WO2020234346A1

WO2020234346A1 - Combined grinding and brushing device

Info

Publication number: WO2020234346A1
Application number: PCT/EP2020/064065
Authority: WO
Inventors: Rainer GULDE; Michael RIEGGER
Original assignee: Hartmetall-Werkzeugfabrik Paul Horn Gmbh; Riegger Diamantwerkzeuge Gmbh
Priority date: 2019-05-20
Filing date: 2020-05-20
Publication date: 2020-11-26
Also published as: EP3787835B1; EP3787835A1; EP3787835C0; DE102019113317A1

Abstract

Combined grinding and brushing device that defines an axis of rotation (22) about which the combined grinding and brushing device (10) is rotated during the use thereof, wherein the combined grinding and brushing device (10) has a main body (24) that is configured substantially in the form of a disc, ring or plate and extends in a circumferential direction about the axis of rotation (22), wherein the main body (24) has, in a first region (42), an abrasive layer (32) that is arranged directly on the main body (24) and extends in the circumferential direction at least partially about the axis of rotation (22), and wherein the main body (24) has, in a second region (44) spaced apart from the first region (42), a brush (34) that is arranged directly on the main body (24) and extends in the circumferential direction at least partially about the axis of rotation (22).

Description

Combined grinding and brushing device

The present application relates to a combined grinding and brushing device which defines an axis of rotation about which the combined grinding and brushing device is rotated in use. In addition, the present invention relates to a machine tool for machining workpieces with the aid of the combined grinding and brushing device according to the invention.

Grinding wheels are used in the processing industry, for example. For edge and

Surface treatment of materials with high hardness values, such as hard metal or cermet, are used. The grinding disks used to machine these hard materials usually have diamond and / or CBN-containing grinding materials as the grinding material, the hardness of which is greater than the hardness of the material to be machined. Exemplary workpieces to be machined, in which an edge and surface Machining is carried out by grinding, are hard metal indexable inserts, which are mostly made from sintered blanks. These hard metal indexable inserts are preferably ground on fully automatic CNC peripheral grinding machines in such a way that sharp and sharp edges can be produced.

Because of the often complex geometry of the indexable inserts to be machined and because of the demand for large numbers of pieces, grinding machines designed specifically for indexable insert manufacture are mostly used in the grinding machining process. Such grinding machines are from various manufacturers, e.g. from Agathon AG (https: // a

), offered. A large number of grinding wheels are also available on the market from these manufacturers, which, for example, are designed with special diamond or CBN grinding rings and are preferably available in a diameter range of 250 to 400 mm.

Such slip rings are usually set up to the peripheral surfaces as well as the

To grind the cutting edges of the geometrically complex indexable inserts. After grinding the circumferential surfaces and cutting edges, these are considered to be sharpened, but in the sharpened state they are not yet suitable for use in a turning or milling tool, since the ground cutting edges would be destroyed (worn) upon initial contact with the hard workpiece surface. Such wear can be explained using the example of a knife blade that is struck on a stone, where such an action would cause the knife blade to become dull immediately.

Due to the aforementioned problem, it is therefore necessary to increase the stability and thus the stability of the cutting edges for the later machining of workpieces. This additional processing step is generally referred to as edge preparation. The edge preparation has the advantage that an additional coating (e.g. a CBN coating) applied to the cutting inserts develops a better adhesive effect on the edges optimized by the edge preparation. Usually, in the edge preparation of the cutting edges, they are rounded (rounded off) by an additional processing step of brushing, blasting or drag grinding.

[0007] E.g. are used in a wet blasting process to deburr the cutting edges of

Indexable inserts The indexable inserts to be machined are threaded onto a rod via a preferably present central bore in the indexable inserts, a predetermined distance being maintained between the threaded indexable inserts. For this purpose, so-called spacer bushings or spacers are usually used, each of which is threaded between two adjacent indexable inserts. A rod equipped in this way is clamped onto a so-called planet wheel below. Then, depending on the result to be achieved, the nozzles of the automatic wet blasting machine are set at a predetermined angle to the cutting edges of the indexable inserts to be blasted. While driving past the cutting edges of the indexable inserts to be treated at a predetermined speed, the nozzles "shoot" a water-silicon mixture jet or a water-aluminum oxide mixture jet at a predetermined pressure at the cutting edges to be blasted. The cutting edges are rounded off by high pressure irradiation.

A disadvantage of the wet blasting method results from the fact that it is due to the

Preparation, ie the threading of the workpieces and spacer sleeves, is associated with a high expenditure of time (and thus high costs). In addition, it is necessary to use different grain sizes of silicon carbide or high-grade corundum in order to achieve different quality levels of the cutting edges. This has the particular disadvantage that when there is a demand for different quality levels, the jet mixture of water and jet medium (e.g. silicon carbide or aluminum oxide) has to be exchanged, which is also associated with a high expenditure of time and therefore high costs, since the entire machine is Further use must be cleaned in order to weed out the remains of the previous blasting mixture. Due to these negative effects of (wet) blasting, this edge preparation process should not be considered in the following. Another frequently used edge preparation process is the above-mentioned brushing

ground cutting edges, with the cutting edges of the indexable inserts being rounded by means of an abrasive brush in such a machining step.

Common brushes available on the market are, for example, so-called plate brushes or round brushes, which are used for the purpose of rounding edges. Brushing is usually done by hand, machine or robot-controlled, the two last-mentioned partially or fully automatic brushing methods being discussed later.

In the so-called (manual) brushes to be processed

Indexable inserts are moved past a rotating brush by hand at a specific setting angle and contact pressure. Due to this manual processing, the properties of the cutting edges and surfaces to be achieved are sometimes very different, whereby, for example, the processing result depends directly on a variation in the contact pressure, the angle of attack and the contact time between the brush and the workpiece. Thus, the quality of the machined surface or cutting edge can vary, for example, depending on the skills of the operator, which is noticeable for an end customer in a variation in the wear resistance or service life of the indexable insert.

Because of these quality differences in the purely manual processing are in

Large series often use special devices that enable semi-automatic brushing of the indexable inserts. A worker holds the insert to be machined against the brush with the aid of the device for a period of, for example, two to five seconds (depending on the degree of edge rounding) per cutting edge and presses the cutting edge to be machined against the brush coating.

Particular difficulties arise with manual brushing when filigree components, for example with a size of 4 mm, are to be manufactured, since in such a case highly specialized workers with a high degree of work experience are required to create surfaces or surfaces suitable for an end customer. To ensure cutting edge qualities. If such a highly specialized employee fails, for example due to absenteeism Illness or vacation, there is a risk of production downtime, through which the economic

Planning security of the production plant is disturbed.

Another disadvantage of manual brushing results from the fact that the brushing takes place on a brush that is arranged separately from the grinding machine, which results in additional transport routes. These additional transport routes increase the risk of improper handling of the indexable inserts, which can lead to damage to the highly sensitive cutting edges. For example, even a slight bump of the indexable inserts during transport (for example due to unevenness or vibrations) is sufficient to lead to breakouts and / or microcracks. Indexable inserts damaged in this way are then no longer suitable for sale to an end customer.

In addition, a special polishing paste is often used with manual brushing

Insert that must be removed from the workpiece surface after brushing.

This results in another negative aspect, since an additional cleaning step is necessary after brushing the cutting inserts.

In addition to the rounding of the cutting edge, the deburring of components, as already mentioned above, is another field of application of brushes that is worth mentioning. In the deburring operation, for example, materials that are particularly prone to burr formation (e.g. molybdenum) are treated after grinding, whereby the same qualitative requirements are not placed on the deburring of workpieces as on the edge preparation of indexable inserts. However, the deburring requires a much higher expenditure of time compared to the edge preparation.

In order to at least partially counter the aforementioned technical disadvantages of manual brushing, machine brushing or robot-controlled brushing is used, for example, in the production of large series. In the case of mechanical brushing, the workpieces to be machined are placed in devices specially developed for this purpose, these devices being custom-made products that only fit a certain type of indexable insert and are only suitable for a certain type of edge preparation are suitable. Because of this, a large number of specially developed devices are also required for a large number of indexable inserts in order to be able to use the advantages of mechanical brushing. In addition, a new device must be developed and manufactured for every customer request with regard to a special edge preparation, which causes high overall development and production costs for the devices.

Another disadvantage of mechanical brushing is that often an abrasive

Additives, such as polishing paste or polishing wax, must be used to ensure the desired surface qualities or cutting edge qualities. Such an abrasive additive leads to a necessary cleaning step of the indexable cutting plates or workpieces afterwards in order to remove the polishing paste or the polishing wax. This in turn results in increased labor and material costs.

An alternative is the so-called. Robot-controlled brushing, in which the to be processed

The workpiece is held against the rotating brush by a robot arm or gripper and is guided past the rotating brush under the same conditions. This type of brushing results in a constant surface or cutting edge quality, but on the other hand has the disadvantage that this type of robotically guided brushing systems are capital-intensive and require a large floor space. Another disadvantage of this fully automatic brushing is that small cutting inserts on the order of a few millimeters cannot be brushed at all or can only be brushed with considerable effort, which is why manual brushing may still be necessary for such filigree indexable inserts.

Thus, robot-controlled brushing systems are only suitable for manufacturing companies with very large quantities, for example when a certain type of indexable insert is to be manufactured in 24/7 operation. In addition, a special specialist is required to operate the robot-controlled brushing system, as the robot arm may have to be reprogrammed depending on the type of edge preparation and the type of indexable insert. In summary, when grinding surfaces and cutting edges by means of a grinding wheel, a further processing step of brushing is generally necessary in order to ensure a desired surface or cutting edge quality and wear resistance for the end customer. The previously known Bürstver drive and devices each show a variety of disadvantages, which must be overcome based on the prior art.

It is therefore an object of the present invention to further develop a device for grinding in such a way that the post-processing process of workpieces can be optimized and, moreover, the quality and wear resistance of the processed workpieces is improved.

According to the invention, the object is achieved by a combined grinding and

Brushing device released, which defines an axis of rotation about which the combined grinding and brushing device is rotated when it is used, the combined grinding and brushing device having a base body. The base body is essentially designed in the shape of a disk, ring, plate, pot or bell and extends in a circumferential direction around the axis of rotation. In a first region, the base body has an abrasive coating which is arranged directly on the base body and extends in the circumferential direction at least partially around the axis of rotation. In addition, the main body has a brush in a second area spaced apart from the first area or adjoining it, which is arranged directly on the main body and extends in the circumferential direction at least partially around the axis of rotation. The brush is preferably an abrasive brush.

[0023] Furthermore, the object according to the invention is achieved by a machine tool,

preferably a rotary grinding machine for machining a workpiece with the combined grinding and brushing device according to the invention.

A major advantage of the inventive combined grinding and

Brushing device is that by arranging a brush on the combined grinding and brushing device, the originally separate working steps of grinding and subsequent brushing takes place. In other words, the edge preparation process, which originally took place after a grinding process and was carried out on a separate machine, is now integrated into the grinding process.

In other words, in the combined grinding and brush device according to the invention, in addition to the abrasive coating provided in the first area of the base body, a brush is provided which is arranged in the second area of the base body. This means that brushing can be carried out immediately after the grinding process on the same (turning) grinding machine, i.e. using the same tool, possible.

Another advantage that comes from the synergetic use of the combined grinding and

Brushing device for grinding and brushing the result is that additional transport routes, which for example harbor a risk of transport damage, can now be omitted. The workpiece to be machined (for example an indexable insert) can be clamped once on the machine tool for machining and first machined by grinding in a first partial work step. In an immediately following second partial work step, the workpiece can be brushed without the need for unclamping or reclamping and transport. The change between grinding and brushing is preferably done only by adjusting (for example by moving along an axis of movement of the machine tool) of the combined grinding and brushing device relative to the workpiece.

A further advantage of the combined grinding and brushing device according to the invention is that the process of machining the workpiece ensures a constant quality independent of the quantity due to the combined tool. In addition, the quality of the brushing is no longer dependent on an operator, as mentioned above, but can take place unmanned in the case according to the invention. This leads in particular to economic production advantages. Another advantage is that the inventive combined grinding and

Brushing device can be used, for example, on a CNC-controlled peripheral grinding machine for processing components and workpieces, with the inventive combination of abrasive coating and brush on the same base body of the combined grinding and brush device processing of the workpieces always at the same angle, pressure and below constant processing time can take place. For brushing in particular, this has the advantage that, for example, there are no quality deviations due to different processing times, different angles of attack and different contact pressures that occurred during manual brushing.

In addition, a machine tool, preferably a CNC-controlled

Peripheral grinding machine, a large number of working parameters, in which the brush can be operated, can be influenced via a (CNC) control. For example, the speed at which the slip ring rotates around its axis of rotation on the peripheral grinding machine can be varied, so that the shape and execution of the rounded edge can be influenced during brushing.

Another advantage is that the inventive attachment of the brush in the second area of the base body of the combined grinding and brushing device and an advantageous embodiment of the brush eliminates a previously common final cleaning operation after brushing on an external machine. Brushing with the combined grinding and brushing device according to the invention is preferably carried out using a cooling medium (for example an oil or an emulsion) which is already used during the grinding.

The brush according to the invention preferably has a dimension specially adapted to the dimensions of the combined grinding and brushing device or the second area of the combined grinding and brushing device, through which a simple attachment of the brush directly in the second area of the base body of the combination ned grinding and brushing device is simplified. The brush is preferably designed as an abrasive brush. In addition, the brush according to the invention preferably has the technically customary properties of conventional ones available on the market Brushes for processing workpieces. It is also advantageous that the brush or the individual brush elements (ie the brush set) have a chemical resistance to the cooling lubricants (for example emulsions or special grinding oils) used in a conventional grinding process.

The phrase “disk-shaped, ring-shaped or plate-shaped” is understood in the present case to mean that the base body preferably has the geometric shape of a disk, a ring or a plate.

The wording "pot-shaped or bell-shaped" is understood to mean that the

The base body has a geometric shape that essentially corresponds to the shape of a pot or a bell. This means that the shape of the base body can also only correspond to a partial area of a pot or a bell.

In the present case, a “disk” is understood to mean a geometric body in the form of a cylinder, the radius of which is many times greater than its thickness. In addition, the disk-shaped base body preferably has a concentric opening, in other words it is preferably configured as a hollow cylinder.

[0035] In the present case, for example, an annular base body can also be a

Design to be understood as a circular base body. The base body is preferably annular in each cross section. However, its outside and / or inside diameter can vary along the axis of rotation. The base body can therefore also have the shape of a hollow truncated cone. This is also considered to be “essentially ring-shaped” here.

In the present case, a plate-shaped configuration of the base body is to be understood, for example, as a continuously configured, preferably cylindrical, plate by which the combined grinding and brushing device is formed.

In practice, however, the base body usually has a somewhat more complex geometry and is not strictly disc-shaped, ring-shaped, plate-shaped, pot-shaped or bell-shaped. In the present case it is therefore called “Essentially disc, ring, plate, pot or bell-shaped”, which is intended to express that the basic geometry of a disc, ring, plate, pot or bell corresponds or at least resembles the overall geometry However, the base body can at least partially deviate therefrom.

In the present case, the “first area” and “second area” are understood to mean two areas which are arranged separately from one another on the base body and can correspond, for example, to partial areas of a total area of the base body.

Both the abrasive coating and the brush are provided directly on the base body of the combined grinding and brushing device, i.e. not distant from this. A configuration is therefore explicitly excluded in which, for example, a round brush and a grinding wheel arranged separately from it are coupled to one another via a common shaft.

In one embodiment, the main body is together with the first area and the second

Area formed in one piece.

This has the particular advantage that the base body of the combined grinding and

Brushing device can be produced, for example, by a single manufacturing process, for example by milling, sintering or injection molding. In other words, the first area and the second area are created directly by the manufacture of the base body and are not attached to it separately.

In one embodiment, the base body has a first partial body and a second partial body connected to the first partial body, the abrasive coating being arranged on the first partial body and the brush being arranged on the second partial body.

This embodiment describes a base body that is made up of two parts

composed, for example. Screwed together. In addition to a releasable fastening, the two partial bodies can also be connected to one another in a non-releasable manner, for example by gluing, welding or soldering. The geometry of the two part bodies can vary differ, with the geometry of the base body according to the overall impression

is furthermore essentially disk-shaped, ring-shaped, plate-shaped, pot-shaped or bell-shaped.

In a further embodiment, the first part of the body is disk, ring, or

designed plate-shaped and the second part of the body is pot-shaped or bell-shaped. A tool interface for connecting the combined grinding and brushing device to a machine tool is provided on the second part of the body.

Although the two partial bodies of the base body are each different from one another

Have geometries, the geometry of the base body is still essentially pot-shaped or bell-shaped according to the overall impression, since the disk-shaped, ring-shaped or plate-shaped configuration of the first part-body in the connected state of the two part-bodies is integrated into the substantially pot-shaped or bell-shaped means is not highlighted by this.

In a further embodiment, the abrasive coating has a metallic and / or

mineral abrasive material.

When designing the abrasive coating, relevant parameters such as the concentration of the cutting material, e.g. represented by predetermined diamond or CBN grain types, and / or optimized by the choice of certain bonding materials so that they are suitable, for example, for grinding a certain hard metal material of the workpiece to be machined. The use of the grinding material to be selected varies depending on the material and hardness of the workpiece to be processed, with a large number of different abrasive coatings with a wide variety of metallic and / or mineral material compositions already available on the market.

In a further embodiment, the base body has an opening extending centrally around the axis of rotation, an inner border of the base body surrounding the opening having a smaller radial distance from the axis of rotation than an outer border of the base body. With this formulation, the preferred cross-sectional shape of the

combined grinding and brushing device (viewed in a cross section orthogonal to the axis of rotation) described. The cross-sectional shape is preferably circular, that is to say has a smaller inner circle diameter than the outer circle diameter. In other words, that means that the circular inner border of the circular disk-shaped cross section is smaller than the circular outer border. This configuration not only includes hollow cylindrical designs of the base body, but also, for example, tapered designs with respect to the axis of rotation, i.e. Includes hollow cone-like or truncated cone-like designs of the base body.

In a further embodiment, a radially outer edge of the abrasive coating ends flush with the outer edge of the base body.

Here is the outer edge of the abrasive coating and the outer edge of the

The base body is preferably circular and has the same distance from the axis of rotation, which defines that the abrasive coating arranged in the first area does not protrude with its outer edge over the base body of the combined grinding and brushing device in the radial direction. In this embodiment, the first area of the base body is preferably an annular area, the inside diameter of which is larger than the inside diameter of the base body and the outside diameter of which corresponds to the outside diameter of the base body.

In a further embodiment of the invention, the combined grinding and

Brushing device rotationally symmetrical to the axis of rotation.

The term "rotationally symmetrical" here includes both rotationally symmetrical

Design of the combined grinding and brushing device (360 ° rotational symmetry) as well as an angle-dependent rotationally symmetrical design of the combined grinding and brushing device (e.g. 90 °, 120 ° or 180 ° rotational symmetry).

This has a particular advantage for the production of the combined grinding and

Brush device, since with a rotationally symmetrical design the individual finished operations can be carried out in a simplified manner. In addition, a rotationally symmetrical design of the combined grinding and brushing device has the advantage that the user does not have to pay attention to its specific positioning when using the combined grinding and brushing device, but rather the combined grinding and brushing device in every position for use, ie for processing the workpiece, it is settable.

In a further embodiment, the first area has a first radial distance from the axis of rotation and the second area has a second radial distance from the axis of rotation, the first radial distance being unequal to the second radial distance.

In this embodiment, the first area and the second area therefore do not overlap, that is to say are provided on the base body at a distance from one another. However, the two areas can directly adjoin one another.

This configuration guarantees that the partial work steps of grinding and brushing are clearly separated from one another by the geometric arrangement of the abrasive coating and the brush on the combined grinding and brushing device. A change between grinding and brushing can be made possible by moving the combined grinding and brushing device along at least one axis of movement of the machine tool.

In a further embodiment, an effective area of the abrasive coating defines a first one

Plane that is oriented transversely to the axis of rotation. Preferably, but not necessarily, the first plane is oriented orthogonally to the axis of rotation.

The term “transversely” is understood here to mean any orientation that is not parallel. This includes, but is not limited to, an orthogonal alignment. “Cross” should therefore not be confused with “vertical”, but rather means an orientation at an angle other than 0 °. In the present case, the term “effective area” refers to the area of the abrasive coating

understood that comes into direct contact with the workpiece surface when grinding a workpiece. This formulation includes that the abrasive coating has individual grains that protrude in the direction of the workpiece surface. In other words, in the first level there are a large number of potential contact points of individual grain sizes of the abrasive coating with a workpiece surface to be processed.

In a further embodiment, the brush has at least a first part brush and a second part brush which are arranged in different segments along the circumferential direction in the first area on the combined grinding and brushing device.

The segmentation of the brush into individual partial brushes has the particular advantage that the attachment of the brush in the second area of the base body of the combined grinding and brush device is simplified, since the brushes do not have to be manufactured to fit the second area. The brush is thus composed of individual brush sections or segments, as seen along the circumferential direction, which are preferably arranged in the second area at a distance from one another in the circumferential direction.

In a further embodiment, the brush has a plurality of one another

spaced brush elements which are each fastened with a first end to the base body and with a second end opposite the first end protrude from the base body in such a way that the free ends come into contact with the surface of the workpiece to be brushed during brushing of a workpiece to step.

This embodiment describes in particular that under the term “brush” no

A continuous block is to be understood, but that a brush consists of a large number of brush elements ("brush hairs") that are separated from one another. The Bürstenele elements are preferably made of metal (e.g. steel) or nylon. Starting from the second area of the base body, the individual Bürstenele elements do not necessarily have to be aligned in the same direction, i.e. parallel to one another. but can also be different angles of inclination to one another, for example

exhibit.

In one embodiment of the invention, at least some of the free ends of the brush lie in a second plane which is parallel to the first plane in which the active area of the abrasive coating lies.

According to this embodiment, the brush and the abrasive coating are therefore parallel to one another

arranged. In order to switch from grinding to brush processing, the workpiece to be processed and / or the combined grinding and Bürstenvor direction must therefore only be adjusted along one axis, for example in the radial direction.

In a further embodiment, the first plane is offset from the second plane along the axis of rotation.

According to this embodiment, the brush and abrasive coating are thus arranged parallel to one another but offset from one another along the axis of rotation. To switch from grinding to brush processing, the workpiece to be processed and / or the combined grinding and brushing device must therefore be adjusted along two axes, for example in the radial direction and axial direction.

In a further embodiment, at least some of the free ends lie on one

Lateral surface that is aligned transversely to the first plane.

For example, in this embodiment, the abrasive coating can be on a circular ring

Be arranged cross-sectional area of the base body. In contrast, the brush can be arranged on a lateral surface oriented transversely to the annular surface on the inner or outer edge.

According to this embodiment, the lateral surface is preferably aligned parallel to the axis of rotation and orthogonally to the first plane. In other words, the abrasive coating is in this Ausgestal device on one face of the combined grinding and brush Arranged device, which is oriented orthogonally to the axis of rotation, whereas the

Brush is arranged on an inner or outer edge of the combined grinding and Bürstenvor direction, which is aligned parallel to the axis of rotation.

In a further embodiment, the brush elements are at least partially directed radially inwards or outwards.

With this arrangement, in particular, attaching the brush to a

Understood outer jacket surface and / or inner jacket surface of the base body.

In a further embodiment, the brush is releasably attached to the base body.

This embodiment has the particular advantage that the releasable attachment of the brush covering to the base body means that it can be replaced after a defined period of use or wear, regardless of the service life of the abrasive covering. This means that the abrasive coating can be changed independently of changing the brush, which means that the maximum service life can be guaranteed in both cases.

In a further embodiment, the brush is materially bonded to the base body

connected.

A cohesive connection can be particularly advantageous when the

Brush is exposed to strong shear forces (i.e. strong forces orthogonal to the longitudinal orientation of the individual brush elements) during use and the brush is to be prevented from becoming detached due to shear. The brush can for example be soldered, welded or glued to the base body.

In a further embodiment, the abrasive coating is integral with the base body

connected. Such an integral connection between the base body and the abrasive coating can be achieved, for example, by the sintering process, a mixture of substances which forms the abrasive coating being connected to the base body by sintering. In addition, it is also conceivable that the base body is made entirely from the mixture of substances used for grinding, for example by means of a sintering process, in which case the abrasive coating is an integral part of the base body.

It is understood that the above and below still to

explanatory features can be used not only in the respectively specified combination, but also in other combinations or alone, without departing from the scope of the present invention.

Exemplary embodiments of the invention are shown in the drawings and are explained in more detail in the following description. Show it:

1 shows an exemplary embodiment of a machine tool for machining a workpiece with a first exemplary embodiment of the combined grinding and brushing device according to the invention;

FIG. 2 shows a detailed view of the machine tool shown in FIG. 1;

3 shows a sectional view of the first exemplary embodiment of the combined grinding and brushing device according to the invention;

4 shows a front view of the first exemplary embodiment of the combined grinding and brushing device;

Fig. 5 is a perspective view of the first embodiment of the combined grinding and brushing device;

6 shows a detailed view of the sectional view shown in FIG. 3 of the first exemplary embodiment of the combined grinding and brushing device; 7 shows a sectional view of a second exemplary embodiment of the combined grinding and brushing device according to the invention;

8 shows a plan view of the second exemplary embodiment of the combined grinding and brushing device;

Fig. 9 is a perspective view of the second embodiment of the combined grinding and brushing device;

Fig. 10 is a detailed view of the sectional view shown in Fig. 7 of the second Ausfüh approximately example of the combined grinding and brushing device;

11 shows a sectional view of a third exemplary embodiment of the combined grinding and brushing device according to the invention;

Fig. 12 is a plan view of the third embodiment of the combined grinding and

Brush device;

Fig. 13 is a perspective view of the third embodiment of the combined grinding and brushing device;

14 shows a detailed view of the sectional view shown in FIG. 11 of the third exemplary embodiment of the combined grinding and brushing device;

15 shows a sectional view of a fourth exemplary embodiment of the combined grinding and brushing device according to the invention;

16 shows a plan view of the fourth exemplary embodiment of the combined grinding and brushing device; Fig. 17 is a perspective view of the fourth embodiment of the combined grinding and brushing device;

18 shows a detailed view of the sectional view shown in FIG. 15 of the fourth exemplary embodiment of the combined grinding and brushing device;

19 shows a sectional view of a fifth exemplary embodiment of the combined grinding and brushing device according to the invention;

20 shows a plan view of the fifth exemplary embodiment of the combined grinding and brushing device;

21 is a perspective view of the fifth embodiment of the combined grinding and brushing device;

22 shows a detailed view of the sectional view shown in FIG. 19 of the fifth exemplary embodiment of the combined grinding and brushing device;

23 shows a sectional view of a sixth exemplary embodiment of the combined grinding and brushing device according to the invention;

24 shows a plan view of the sixth exemplary embodiment of the combined grinding and brushing device;

Fig. 25 is a perspective view of the sixth embodiment of the combined grinding and brushing device;

FIG. 26 shows a detailed view of the sectional view of the sixth shown in FIG. 23

Embodiment of the combined grinding and brushing device; 27 shows a sectional view of a seventh exemplary embodiment of the combined grinding and brushing device according to the invention;

28 shows a plan view of the seventh exemplary embodiment of the combined grinding and brushing device;

29 is a perspective view of the seventh embodiment of the combined grinding and brushing device; and

FIG. 30 shows a detailed view of the sectional view of the seventh exemplary embodiment of the combined grinding and brushing device shown in FIG. 27.

1 shows a machine tool with an exemplary embodiment of a

Combined grinding and brushing device according to the invention, the machine tool being identified in its entirety by the reference number 100. The combined grinding and brushing device according to the invention is identified by the reference number 10.

The machine tool 100 is preferably one

Peripheral grinding machine, more preferably a CNC-controlled peripheral grinding machine that is used for machining workpieces. In the present case, a workpiece 12 to be machined is represented by an indexable insert 12 which is spiked onto a workpiece carrier 14 of the machine tool 100. The indexable insert 12 is mounted on a mandrel-like attachment of the workpiece carrier 14 and aligned with respect to the combined grinding and brushing device 10 in such a way that machining of a cutting edge 16 of the indexable insert 12 is made possible by the combined grinding and brushing device 10 (see FIG. 2). The workpiece carrier 14 or the indexable insert 12 is set at a predefined setting angle relative to the combined grinding and brushing device 10 in order to enable a predefined machining of the cutting edges 16 of the indexable insert 12. The combined grinding and brushing device 10 is mounted on the machine tool 100 via a tool interface 18, with the combined grinding and brushing device 10 being mounted on the tool interface 18 via fastening screws 20 in the present case (see FIG. 2). During the machining, the combined grinding and brushing device 10 rotates about an axis of rotation 22.

The combined grinding and brushing device 10 has a base body 24 which is essentially designed in the shape of a disk, ring or plate. In the present case, the base body 24 is designed essentially in the shape of a ring or disk. More precisely, it has the shape of a hollow truncated cone. The base body 24 can, for example, be made of a metallic material.

A grinding with the combined grinding and brushing device according to the invention

10 takes place by a predefined setting of the indexable insert 12 at a predefined setting angle relative to a grinding layer 32 arranged on the base body 24 of the combined grinding and brushing device 10. The grinding layer 32 is in the case shown in FIGS Grinding and brushing device 10 is provided, the precise positioning of the Schleifbe lay 32 in the description of Fig. 3-6 will be discussed in more detail.

In addition, a brush 34 is arranged on the base body 24, on the exact

Positioning is also discussed in the description of the following figures.

The machine tool 100 can preferably be moved via a control unit (not shown) at least along a first axis of movement 26 in order to enable relative adjustment with respect to the workpiece 12, at least along the first axis of movement 26. In the present case, the machine tool 100 is set up to be movable along three mutually orthogonal movement axes 26, 28, 30 relative to the workpiece 12 or relative to the workpiece carrier 14. In other exemplary embodiments not shown here, for example, the workpiece carrier 14 can also move with respect to the combined grinding and brushing device 10 be moved along at least one direction of movement. To rotate the combined grinding and brush device 10 or the tool holder 18 about the axis of rotation 22, an electric motor, not explicitly shown here, can be used, for example, which is preferably controllable over a large speed range.

In Figures 1 and 2, the combined grinding and brushing device 10 is opposite to that

Indexable insert 12 positioned along first axis of movement 26 such that cutting edge 16 of indexable insert 12 can be brushed by brush 34 arranged on base body 24 of combined grinding and brushing device 10. The brushing is the second partial processing step in the processing of the cutting edge 16 and takes place after a first partial processing step of grinding, in which the indexable insert 12 is positioned along the first axis of movement 26 such that it can come into contact with the abrasive coating 32.

In Fig. 3 to 6 is a first embodiment of the combined according to the invention

Grinding and brushing device 10 shown in different views. The combined grinding and brushing device 10 is in the present case designed to be rotationally symmetrical to the axis of rotation 22. The base body is essentially disk-shaped or ring-shaped, that is to say has the shape of a disk or a ring in a cross-sectional area running orthogonally to the axis of rotation 22. The base body 24 is designed in particular in the shape of a hollow truncated cone. It has an opening 36 extending centrally around the axis of rotation 22. The opening 36 defines a circumferential inner border 38 of the base body 24. The inner border 38 has a smaller radial distance from the axis of rotation 22 than a circumferential outer border 40 of the base body 24.

As can be seen in particular in FIG. 6, it points in the circumferential direction around the

The base body 24 extending around the axis of rotation 22 has a first region 42 and a second region 44 spaced apart from the first region 42. The first area 42 is at a first radial distance ri from the axis of rotation 22. The second area 44 is at a second distance r ₂ from the axis of rotation 22, where ri is greater than r ₂ . The abrasive coating 32 is arranged in the first region 42 of the base body 24. The brush 34 is arranged in the second region 44 of the base body 24. The abrasive coating 32 is according to the first exemplary embodiment accordingly further outwards than the brush 34, so that it surrounds the brush 34.

In the present case, the first region 42, in which the abrasive coating 32 is arranged, defines an annular surface. The second area 44, in which the brush 34 is arranged, is also designed as an annular surface in the first exemplary embodiment, which is set back in the axial direction to the axis of rotation 22 compared to the annular surface of the first area 42.

In the present case, the abrasive coating 32 is designed as a continuous circular ring-shaped block, which preferably has a metallic and / or mineral abrasive material. It ends flush with the outer border 40 of the base body 24 and has an active area which comes into contact with a surface of this workpiece 12 when a workpiece 12 to be machined is being ground. This effective area defines a first plane E1 which is oriented transversely, in the present case orthogonally, to the axis of rotation 22. In principle, it is also possible in other exemplary embodiments, not shown, for the working area of the abrasive coating 32 and thus the plane E1 defined by it to be aligned parallel to the axis of rotation 22 or at an acute or obtuse angle to it.

The brush 34 has at least a first part brush 34a and a second part brush 34b, which are arranged in different segments along the circumferential direction in the second region 44 on the combined grinding and brushing device 10.

According to the first exemplary embodiment shown in FIGS. 3-6, the brush 34 has, more precisely, a plurality of first and second partial brushes 34a, 34b which are each segmented in the second area 44 along the circumferential direction.

The brush 34 or the part brushes 34a, 34b has or have a plurality of

brush elements 46 spaced apart from one another, which due to their very small dimensions (in the range of a few tenths of a millimeter to millimeters) are not shown in detail in the figures. The brush elements 46 are with a first end 48 attached to the base body 24. With a free end 50 opposite the first end 48, the plurality of brush elements 46 protrudes from the base body 24 in such a way that the free ends 50 come into contact with a surface of the workpiece 12 to be brushed while the workpiece 12 is being brushed. The surface of the workpiece 12 to be brushed can be, for example, the cutting edge 16 shown in FIG.

The brush 34 or the partial brushes 34a, 34b can, for example, be connected to the base body 24

be firmly bonded or be releasably screwed to this force-fit.

In the present case, at least some of the free ends 50 of the brush elements 46 lie on a second plane E2 running orthogonally to the axis of rotation 22. In the first exemplary embodiment, this second level E2 is equivalent to the first level E1.

Brush 34 and abrasive coating 32 are thus arranged next to one another and the free ends 50 of the plurality of brush elements 46 are at the same height as the effective area of abrasive coating 32 with respect to the axial direction defined by the axis of rotation 22 be offset from one another along the axis of rotation 22.

The first region 42 of the base body 24, in which the abrasive coating 32 on the base body

24 is attached, lies in the present case in a third plane E3 which extends orthogonally to the axis of rotation 22. The second area 44, in which the brush 34 is attached to the base body 24, lies in a fourth plane E4, which is set back in the axial direction, that is to say along the axis of rotation 22, with respect to the third plane E3. The third plane E3 runs parallel to the fourth plane E4. Thus, both planes E3 and E4 are oriented orthogonally to the axis of rotation 22 in the first exemplary embodiment.

In Fig. 7-30 are six further embodiments of the invention

combined grinding and brushing device 10 shown, in equivalence to the first embodiment shown in Fig. 3-6, four views are shown for each further embodiment. Because of the foregoing, for the further Embodiments only on the distinguishing features with respect to the first

Embodiment received.

In the second embodiment shown in Fig. 7-10, at least some of the free ends 50 of the brush elements 46 on a parallel to the axis of rotation 22 extending lateral surface 52, which extends in the circumferential direction around the axis of rotation 22 around. The first plane E1 is aligned here orthogonally to this lateral surface 52. The brush 34 or at least some of the brush elements 46 of the brush 34 are directed outward in the radial direction in the second exemplary embodiment and project from the base body 24. The free ends 50 of the brush elements 46 thus protrude beyond the outer border 40 of the base body 24 in the radial direction.

In the second exemplary embodiment, too, the brush 34 has at least the first and second partial brushes 34a, 34b, which are arranged in different segments in the second region 44 of the base body 24. The second region 44 lies on a lateral surface of the base body 24 which is aligned parallel to the axis of rotation 22. This jacket surface is an outer jacket surface of the base body 24.

In the second embodiment is for a change between the

Processing step grinding and the processing step brushing in addition to a process of the combined grinding and brushing device 10 along the first movement axis 26 of the machine tool 100, a process along the third direction of movement 30 of the machine tool 100 is also necessary.

In Fig. 11-14 a third embodiment of the slip ring 10 according to the invention is shown. In a manner similar to that described in connection with FIGS. 7 to 10, the brush 34 or the at least two partial brushes 34a, 34b is arranged on a lateral surface. The outer surface defined by the second region 44 is provided on the inside of the circular or hollow truncated cone-shaped base body 24, i.e. forms an inner surface of the base body 24. At least some of the free ends 50 of the brush 34 are also located on a radially inwardly directed outer surface. The brush 34 or the Brush elements 46 of the brush 34 are thus in the radial direction towards the inside

Axis of rotation 22 directed.

15-18 show a fourth embodiment, which is shown in Fig. 3-6, the first

Embodiment is similar, wherein in the fourth embodiment the base body 24 is modified compared to the first embodiment in such a way that the second region 44 is set back from the first region 42 in the axial direction to the axis of rotation 22 by a greater distance than in the first embodiment. In other words, the third level E3 is at a greater distance from the fourth level E4 compared to the first exemplary embodiment. The third plane E3 is aligned parallel to the fourth plane E4 and orthogonal to the axis of rotation 22.

This greater distance between the first area 42 and the second area 44 or between the third level E3 and the fourth level E4 enables the plurality of brush elements 46 of the brush 34 to be longer compared to the first embodiment . E.g. the brush elements 46 of the first embodiment have a length of 6 mm, whereas the brush elements 46 of the second embodiment have a length of 12 mm. Correspondingly, the first region 42 is offset from the second region 44, for example by 6 mm further than in the first exemplary embodiment, in the axial direction relative to the axis of rotation 22.

The free ends 50 of the brush elements 46 close, as in the first

Embodiment, in relation to the axial direction to the axis of rotation 22 flush with the active area of the abrasive coating 32. I.e. in other words, that the first plane E1 and the second plane E2 are axially at the same height with respect to the axis of rotation 22.

19-22 is a fifth embodiment of the combined according to the invention

Grinding and brushing device 10 shown, in which the brush 34 is arranged in a manner similar to that of the first and fourth exemplary embodiments. In the fifth embodiment, however, the brush 34 has, in contrast to this, individual cylindrical brush elements 46 which are each spaced apart and offset from one another in the second region 44 of the base body 24 are arranged. In the case of the first partial brush 34a, the cylindrical brush elements 46 are arranged along a first circle, essentially at equal distances from one another. In the case of the second partial brush 34b, the cylindrical brush elements 46 are arranged along a second circle, essentially at equal distances from one another. The first circle has a larger diameter than the second circle. The brush elements 46 of the first part brush 34a are rotated by an angle around the axis of rotation 22 with respect to the brush elements 46 of the second part brush 34b in such a way that one brush element 46 of the first part brush 34a is arranged between two brush elements 46 of the second part brush 34b. In the present case, the brush elements 46 can, for example, have a large number of brush hairs which are fastened close to one another with the respective first ends 48 in the second region 44 on the base body 24. The two part brushes 34a, 34b are not arranged here, as before, offset from one another in segments along the circumferential direction, but rather offset radially from one another.

In the sixth embodiment shown in Fig. 23-26, the base body 24 is in

Compared to the first to fifth exemplary embodiment, it is dimensioned larger in the axial direction to the axis of rotation 22. The base body 24 has a bell-like configuration with an opening 36 which again runs concentrically around the axis of rotation 22 and has a smaller diameter in comparison to the first to fifth exemplary embodiments. The shape of the bell-like or cup-shaped base body 24 is thus still essentially ring-shaped in a cross section orthogonal to the axis of rotation 22. The base body 24 in the present case has a first part body 24 ‘and a second part body 24 ″ which is detachably connected to the first part body 24‘. The abrasive coating 32 is arranged on the first part body 24 '. The brush 34 is arranged on the second part body 24 ″. In the present case, the first part body is screwed to the second part body 24 ″ by 24. In other exemplary embodiments, the first partial body 24 'can also be connected to the second partial body 24' in a non-detachable manner.

The first part body 24 ‘is designed in the present ring-shaped, can in others

However, embodiments can also be designed in the form of a disk or plate. The second part body 24 ″ is pot-shaped or bell-shaped. On the second part of the body 24 “is a tool interface 18 for connecting the combined grinding and

Brush device 10 is provided on machine tool 100.

In this embodiment of the base body 24 can, for example. On a separate

Tool interface can be dispensed with as an additional component, in such a case the combined grinding and brush device 10 can be fastened directly to the tool interface 18 provided on the second part body 24 ″ of the base body 24, for example by means of assembly screws 54. To fasten the base body 24, it preferably has fastening bores 56. In other words, in this embodiment, the base body 24 forms the cup wheel.

In the sixth embodiment, the brush 34 is fastened to the base body 24 by a plurality of screws 58, whereby a reversible loosening and replacement of the brush 32 is made possible.

27-30 show a seventh embodiment of the combined according to the invention

Grinding and brushing device 10. The base body 24 is essentially bell-shaped in its entirety to the base body 24 of the sixth exemplary embodiment and also has the first part body 24 'and the second part body 24 ″. In this exemplary embodiment, the first part body 24 is not releasably welded to the second part body 24 ″. In other exemplary embodiments, the base body 24 can also be made in one piece and have a bell or top shape. This means that a bell-shaped or pot-shaped configuration of the base body 24 does not require the base body to have the two sub-bodies 24 ‘, 24 ″.

In the seventh embodiment, at least part of the free ends 50 is the

Brush elements 46, however, in turn run on a lateral surface 52 parallel to the axis of rotation 22, which extends in the circumferential direction around the axis of rotation 22. The first plane E1 is oriented orthogonally to the lateral surface 52. The brush 34 or at least some of the brush elements 46 of the brush 34 are in the radial direction directed outwards and protrude from the base body 24. The free ends 50 of the brush elements 46 thus protrude beyond the outer border 40 of the base body 24 in the radial direction. The second region 44 is further spaced apart from the first region 42 in the axial direction compared to the second exemplary embodiment (see FIGS. 7-10), which is due in particular to the dimensioning of the base body 24.

Claims

1. Combined grinding and brushing device (10) which defines an axis of rotation (22) around which the combined grinding and brushing device (10) is rotated when used, the combined grinding and brushing device (10) having a base body (24) which is essentially disc-shaped, ring-shaped, plate-shaped or bell-shaped and extends in a circumferential direction around the axis of rotation (22), the base body (24) having an abrasive coating (32) in a first region (42) ), which is arranged directly on the base body (24) and extends in the circumferential direction at least partially around the axis of rotation (22), and wherein the base body (24) is spaced apart from or on the first region (42) adjoining second area (44) has a brush (34) which is arranged directly on the base body (24) and extends in the circumferential direction at least partially around the axis of rotation (22).

2. Combined grinding and brush device according to claim 1, wherein the base body (24) together with the first region (42) and the second region (44) is integrally formed.

3. Combined grinding and brush device according to claim 1, wherein the base body (24) has a first part body (24 ') and a second part body (24 ") connected to the first part body (24'), wherein on the first part body ( 24 ') the abrasive coating (32) is arranged and the brush (34) is arranged on the second part body (24 ″).

4. Combined grinding and brush device according to claim 3, wherein the first part body (24 ') is designed in the shape of a disk, ring or plate, and wherein the second part body (24 ″) is designed in a pot or bell shape, and where an a tool interface (18) for connecting the combined grinding and brushing device (10) to a machine tool (100) is provided on the second part body (24 ″).

5. Combined grinding and brushing device according to one of the preceding claims, wherein the abrasive coating (32) comprises a metallic and / or mineral abrasive material.

6. Combined grinding and brushing device according to one of the preceding claims, wherein the base body (24) has an opening (36) extending centrally around the axis of rotation (22), one of the opening (36) encircling the inner border (38) the base body (24) has a smaller radial from the axis of rotation (22) than an outer border (40) of the Grundkör pers (24).

7. Combined grinding and brushing device according to one of the preceding claims, wherein a radially outer edge of the abrasive coating (32) is flush with the outer edge (40) of the base body (24).

8. Combined grinding and brush device according to one of the preceding claims, wherein the combined grinding and brush device (10) is rotationally symmetrical to the axis of rotation (22).

9. Combined grinding and brushing device according to one of the preceding claims, wherein the first area (42) has a first radial distance (d ^ from the axis of rotation (22) and the second area (44) has a second radial distance (d ₂ ) from of the axis of rotation, the first distance (d ^ not equal to the second distance (d ₂ ).

10. Combined grinding and brush device according to one of the preceding claims, wherein an effective area of the abrasive coating defines a first plane (E1) which is oriented transversely to the axis of rotation (22).

11. Combined grinding and brush device according to one of the preceding claims, wherein the brush (34) has at least a first part brush (34a) and a second part brush (34b), which in different segments along the circumferential direction in the second area (44) the combined grinding and brushing device (10) are arranged.

12. Combined grinding and brush device according to one of the preceding claims, wherein the brush (34) has a plurality of spaced-apart brush elements (46) which are each attached to a first end (48) on the base body (24) and with a the free end (50) opposite the first end (48) protrude from the base body (24) in such a way that the free ends (50) come into contact with the surface of the workpiece (12) to be brushed while a workpiece (12) is being brushed to step.

13. Combined grinding and brushing device according to claims 10 and 12, wherein at least some of the free ends (50) lie in a second plane (E2) which is parallel to the first plane (E1).

14. Combined grinding and brushing device according to claim 13, wherein the first plane (E1) along the axis of rotation (22) is offset from the second plane (E2).

15. Combined grinding and brushing device according to claims 10 and 12, wherein at least part of the free ends (50) lies on a lateral surface (52) which is oriented transversely to the first plane (E1).

16. Combined grinding and brush device according to claim 15, wherein the jacket surface (52) is aligned parallel to the axis of rotation (22) and orthogonal to the first plane (E1).

17. Combined grinding and brush device according to claim 12, wherein the Bürs tenelemente (46) are at least partially directed radially inward or outward.

18. Combined grinding and brush device according to one of the preceding claims, wherein the brush (34) is releasably attached to the base body (24).

19. Combined grinding and brush device according to one of the preceding claims, wherein the brush (34) is materially connected to the base body (24) a related party.

20. Combined grinding and brush device according to one of the preceding claims, wherein the abrasive coating (32) is integral with the base body (24) verbun the.

21. Machine tool (100) for machining a workpiece (12) with a combined grinding and brushing device (10) according to one of claims 1 to 20