DE102020121446A1 - Workpiece processing system and method for operating a workpiece processing system - Google Patents

Abstract

A workpiece processing system for processing and/or producing a workpiece edge (48a-b) on a panel-shaped workpiece (40) comprises a detection device (38) controlled by a control and regulating device (36) for automatically detecting at least one property of a workpiece edge (48a-b ). The detection device (38) has an image detection device (52), with a viewing axis (56a-b) of the image detection device (52) in the area of the workpiece edge (48a-b) being directed at an area of the workpiece edge (48a-b) to be recorded and is at least approximately orthogonal to a plane (58) of the plate-shaped workpiece (40).

Description

The invention relates to a workpiece processing system and a method for operating a workpiece processing system according to the preambles of the independent claims.

the DE 10 2017 103 867 A1 discloses a method for operating a machine tool in which, during a machining operation, a process variable, for example a feed rate, a quality variable resulting from the machining operation on the workpiece, for example an optical quality, a variable that characterizes the workpiece used, for example a material, and a Time size of the tool, such as a previous operating time, are linked to a record. the DE 36 33 089 A1 discloses an arrangement for testing the quantum quality of plate-shaped semi-finished products. For this purpose, a light beam is directed onto an edge using a halogen light source and the scattering is recorded using a camera.

Proceeding from this, it is the object of the present invention to provide a device and a method which enable the production of high-quality workpieces cost-effectively and with a high cycle rate.

This object is achieved by a workpiece processing system and a method having the features of the independent claims. Advantageous developments of the invention are specified in the dependent claims.

The workpiece processing system according to the invention has the advantage that it can be used to determine the quality of a workpiece edge generated during processing in a fully automated manner and immediately. This makes it possible to react to the previously determined quality during a subsequent processing operation and either increase the cycle rate (if the quality is "too good") or reduce the cycle rate or change other operating parameters (if the quality is "too bad"). . If necessary, it can also be arranged that the workpiece is produced again if the quality is "too bad". A technology for determining the processing quality is used that can reliably record the quality of a processed or manufactured workpiece edge.

In concrete terms, this is achieved by a workpiece processing system for processing and/or producing a workpiece edge on a plate-shaped workpiece. This can, for example, be a panel dividing system for dividing at least one panel-shaped workpiece. Such panel dividing systems are known, for example, in the form of panel dividing saws with which, for example, parts for the production of pieces of furniture can be produced. The workpiece processing system according to the invention comprises a feed table on which the plate-shaped workpiece lies and from which it can be fed to a processing device by means of a conveyor device, for example by means of a program slide with collets.

The processing device can preferably be a sawing device or a sawing unit. The workpiece processing system can also include a removal table onto which the workpiece processed by the processing device is conveyed and from which it can either be fed back to the processing device for a further processing operation or from which it can be removed and, for example, stacked.

A control and regulating device of the workpiece processing system according to the invention serves to control and regulate the operation of the workpiece processing system. This operation can preferably run fully automatically, for example using a robot which can also be controlled by the control and regulating device and which handles the panel-shaped workpiece in particular when it is lying on the removal table.

The workpiece processing system according to the invention comprises a detection device controlled by the open-loop and closed-loop control device for automatically detecting at least one property of a workpiece edge processed and/or produced by the processing device. In this case, the detection device comprises at least one image detection device, for example a camera with a CCD sensor. A line of sight of the image capturing device is directed at least in the area of the edge of the workpiece to an area of the edge of the work piece to be captured, the line of sight being at least approximately orthogonal to a plane of the plate-shaped work piece. In the case of a horizontally lying, plate-shaped workpiece, the image acquisition device thus observes the workpiece edge from above or below, so that an optimal assessment of the quality of the workpiece edge is made possible.

In particular, outliers in a coating in the area of the workpiece edge can be detected in this way and qualified according to size and number. A waviness of the generated workpiece edge can also be detected and qualified. Overall, an evaluation can also provide a quality indicator or quality indicator size can be determined, by means of which a simple decision can be made as to whether an operating parameter of the workpiece processing system should be changed and/or whether the assessed workpiece has to be produced again.

In a development, it is proposed that the detection device is arranged in the area of a removal table, preferably attached to the removal table or integrated into it. In this way, the integration of the detection device into the workpiece processing system is possible without major interventions in the design of the workpiece processing system being necessary. It may even be possible to retrofit existing workpiece processing systems with a detection device. In addition, this positioning of the detection device does not affect the course of the process in the workpiece processing system, or at least only to a small extent.

In a further development of this, it is proposed that the detection device can be moved automatically from a rest position to a working position and back, with it being arranged below a support level of the removal table in the rest position and being arranged in the working position in such a way that it has the property of the workpiece edge of a Removal table lying workpiece can detect. Thus, the detection device does not or hardly appears in the lowered state, so that the operation of the workpiece processing system remains undisturbed or unaffected. In particular, the handling of workpieces on the removal table, either by an operator or by a robot, can remain at least largely unaffected by the detection device. Only when the quality of a workpiece edge is to be recorded is the recording device automatically moved into the working position under the control of the control and regulation device.

In a further development it is proposed that the detection device for detecting the property of the workpiece edge can be moved longitudinally to the workpiece edge, it preferably having a drive device which can move the detection device longitudinally to the workpiece edge while the detection device detects the property of the workpiece edge. This enables a larger area of the workpiece edge to be detected, which improves the reliability of the assessment of the quality of the workpiece edge.

In a further development it is proposed that it has a fixing device which can fix the workpiece while the detection device detects the property of the workpiece edge. This development also improves the informative value of the quality of the workpiece edge assessed by the detection device.

In a further development, it is proposed that the image acquisition device has at least two CCD sensors, which are arranged on opposite sides of the workpiece relative to the plane of the plate-shaped workpiece, so that a first line of sight of the first CCD sensor points to a first edge of the workpiece and a second line of sight to the second CCD sensor is aimed at a second workpiece edge that is adjacent and parallel to the first workpiece edge. This permits comprehensive qualification of the workpiece edge of the plate-shaped workpiece produced during processing. This takes into account the fact that the plate-shaped workpieces practically always have a discrete thickness and thus a workpiece edge has two workpiece edges.

In a further development of this, it is proposed that the detection device comprises an illumination device, with a beam axis of the illumination device in the area of the workpiece edge being directed at the area of the workpiece edge to be recorded and at least approximately in the plane of the plate-shaped workpiece and at least approximately orthogonally to a longitudinal extension the edge of the workpiece. The beam axis of the illumination device is thus essentially orthogonal to the viewing axis of the image acquisition device, whereby outliers and ripples of the workpiece edge are made particularly visible, which in turn improves the quality of the assessment of the workpiece edge. In addition, a detection device that is independent of external influences, for example the daylight that is present at the moment, is created, as a result of which reproducible results can be achieved when assessing the quality of workpiece edges. The lighting device preferably generates a light beam that is focused on the edge of the workpiece. A preferably white LED or a halogen lamp can be used as the light source, for example. The use of a laser is also conceivable.

In a development of this, it is proposed that the lighting device has at least two light sources, with a first beam axis of the first light source being directed at the first workpiece edge and a second beam axis of the second light source being directed at the second workpiece edge. Particularly in the case of workpieces with a significant thickness and thus workpiece edges that are clearly spaced apart from one another, this leads to more reliable results in the workpiece edge processed by the processing device Recording the quality. It is also fundamentally conceivable that only a single light source is used, but its light is split into a number of beam axes that are separate from one another, for example by means of mirrors or optical waveguides. It is also conceivable that the separation into a plurality of beam axes that are separate from one another takes place by appropriately aligning individual segments of the light source, for example by the light source having individual LEDs that can be appropriately aligned

In a further development, it is proposed that the image acquisition device comprises a CCD sensor whose viewing axis is initially not aligned orthogonally to the plane of the workpiece, and has at least one deflection device for the viewing axis, which has the viewing axis of the CCD sensor in the area of the workpiece edge orthogonally to the plane of the workpiece to the edge of the workpiece. With this configuration of the workpiece processing system according to the invention, the CCD sensor can be arranged at virtually any point, for example a protected point, of the workpiece processing system. In this case, the deflection device can have one or more mirrors, but optionally also, for example, a light guide.

The invention also includes a method for operating a workpiece processing system, which is controlled and regulated by a control and regulating device and in which a panel-shaped workpiece is fed to a processing device and a workpiece edge of the panel-shaped workpiece is processed and/or produced. It is proposed that at least one property of the processed and/or produced workpiece edge is recorded by means of a recording device, the recording device having at least one image recording device, the method also having the following steps: a. Aligning a visual axis of the image capturing device to a region of the workpiece edge to be captured in such a way that the visual axis in the region of the workpiece edge is approximately orthogonal to a plane of the plate-shaped workpiece; b. Creation of at least one image of the edge of the workpiece by means of the image acquisition device with the lighting device switched on; and c. automatic evaluation of the created image and automatic determination of at least one property of the workpiece edge by means of the evaluation.

In a further development of the method according to the invention, it is proposed that it also have the following steps: Aligning a beam axis of an illumination device with the area of the edge to be detected in such a way that the beam axis in the area of the workpiece edge is at least approximately in the plane of the plate-shaped workpiece and at least in is approximately orthogonal to a longitudinal extent of the edge of the workpiece, and creating the image of the edge of the workpiece when the lighting device is switched on.

In a further development it is proposed that the method steps be carried out for different areas of the workpiece edge. This improves the quality of the assessment of the quality of the machined workpiece edge.

In a further development it is proposed that the image capturing device is stationary relative to the processed and/or produced workpiece edge while the image is being created. In order to still be able to capture the largest possible area of the workpiece edge, either the workpiece can be moved relative to the image capture device, or the viewing axis of the image capture device is moved, for example by means of movable mirrors. In principle, however, it is also conceivable for both the image capturing device and the workpiece to be stationary during the image capturing process.

In one development, it is proposed that the image capturing device move relative to the edge of the workpiece while the image is being created and that the lighting device emit a flash-like light pulse to create an image. This further improves the quality of the detection result.

In a further development, it is proposed that at least two images be created, with a first image showing an end area of the workpiece edge (e.g. a corner of the workpiece) and a second image showing an area of the workpiece edge remote from the end area (e.g. a central part lying between two corners). area) depicts. This also serves to improve the quality assessment, since only locally occurring quality values of the workpiece edge can be compensated.

In a further development, it is proposed that the method includes the step: automatic creation of a flow chart by the control and regulation device of the panel processing system, which includes at least steps b and c above. In this way, the process of detecting the quality of the workpiece edge is automatically integrated into the workpiece processing sequence, so that no manual interaction by an operator is necessary.

• 1 eine schematische Draufsicht auf eine erste Ausführungsform einer Werkstückbearbeitungsanlage in Form einer Plattenaufteilsäge;
• 2 einen schematischen Schnitt durch einen Bereich der Werkstückbearbeitungsanlage von 1, mit einer Erfassungseinrichtung mit einer Bilderfassungseinrichtung und einer Beleuchtungseinrichtung;
• 3 eine schematische Draufsicht auf den in 2 gezeigten Bereich;
• 4 eine schematische Seitenansicht des in 2 gezeigten Bereichs;
• 5 eine Darstellung ähnlich zu 1 einer zweiten Ausführungsform;
• 6 eine Darstellung ähnlich zu 1 einer dritten Ausführungsform;
• 7 eine Darstellung ähnlich zu 1 einer vierten Ausführungsform;
• 8 eine Darstellung ähnlich zu 1 einer fünften Ausführungsform;
• 9-12 schematische Seitenansichten auf unterschiedliche Ausführungen von Erfassungseinrichtungen; und
• 13 ein Flussdiagramm eines Verfahrens zum Betreiben der Werkstückbearbeitungsanlage von 1.

Embodiments of the invention will be explained below with reference to the accompanying drawings. Show in the drawing:

• 1 a schematic plan view of a first embodiment of a workpiece processing system in the form of a panel dividing saw;
• 2 a schematic section through an area of the workpiece processing system of 1 , having a detection device with an image detection device and an illumination device;
• 3 a schematic plan view of the in 2 shown area;
• 4 a schematic side view of the in 2 shown area;
• 5 a representation similar to 1 a second embodiment;
• 6 a representation similar to 1 a third embodiment;
• 7 a representation similar to 1 a fourth embodiment;
• 8th a representation similar to 1 a fifth embodiment;
• 9-12 schematic side views of different designs of detection devices; and
• 13 a flow chart of a method for operating the workpiece processing system of FIG 1 .

In the following, functionally equivalent elements and areas in different embodiments bear the same reference symbols. They are usually only explained in greater detail the first time they are mentioned. In addition, not all reference numbers are always entered in the figures for reasons of clarity.

A workpiece processing system bears the reference numeral 10 in the figures. In the present example, this is a panel dividing system, namely a panel dividing saw, with which large-format panel-shaped workpieces can be divided. In the present example, it comprises a feed table 12, which can also be formed, for example, by a plurality of parallel roller rails.

A machine table 14 adjoins the feed table 12, which can be designed, for example, as an air cushion table. A saw gap 16 is present in the machine table 14, and a saw carriage with a saw unit is arranged below the machine table 14 (not shown), which can be moved along a saw line 18 indicated by dot-dash lines. In this respect, the saw unit forms a processing device. Above the machine table 14 there is a pressure bar, not shown, which can be moved vertically, so that a workpiece can be clamped between it and the machine table 14 during processing by the saw unit and thereby fixed.

On the opposite side of the machine table 14 from the infeed table 12, a removal table 20 consisting of several individual segments adjoins the machine table and can also be designed as an air-cushion table. A robot 22 is present to the side of the removal table 20 and has a robot arm 24 and a gripping device, for example in the form of a suction traverse 26 . A possible working area of the robot 22 is indicated by a circular dot-dash line 28 . The work area 28 covers part of the unloading table 20, part of the machine table 14 and part of the infeed table 12.

On the side of the feed table 12 and the removal table 20 there is an angle ruler 30 which is used to align workpieces relative to the sawing line 18 . To move and fix workpieces, a portal-like program slide 32 is provided in the area of the feed table 12, on the side of which facing the machine table 14 a plurality of collets 34 are fastened. With these, a rear edge of a workpiece viewed in a feed direction (arrow 35) can be gripped. The program fence 32 can be automatically moved parallel to the feed direction 35 by means of a corresponding drive, as a result of which a workpiece gripped by the program fence 32 can be positioned relative to the sawing line 18 .

The workpiece processing system 10 also includes a control and regulating device 36. This can include, for example, one or more computers with appropriate microprocessors and memories, on which program code for executing specified method steps is stored. For this purpose, the control and regulating device 36 can have communication interfaces (not shown in the drawing) with which it communicates with an operator and/or other control and regulating devices as well as with actuators and drives of the workpiece processing system 10, for example the saw unit, the program fence 32 and the robot 22 can communicate.

The communication interfaces can include, for example, a screen, a keyboard, a microphone, a loudspeaker and, in general, connections for exchanging data. To control and/or regulate the workpiece processing system 10, the control and regulation device 36 receives signals from a large number of sensors, which are also not shown here.

The workpiece processing system 10 also includes a detection device 38, which is used in 1 shown embodiment is arranged by way of example in the area of the unloading table 20, specifically in 1 for example, at an edge of the removal table 20 that protrudes or faces away from the machine table 14 .

The detection device 38 is used, in a manner yet to be explained, for the automatic detection of a property characterizing a quality of a workpiece edge of a workpiece that has been machined or produced by means of the processing device. Such a workpiece is in 1 shown lying on the unloading table 20, where it bears the reference number 40. A workpiece edge, on which the said workpiece edge is present, is in 1 labeled 42.

Components of the detection device 38 are described in greater detail, although schematically, in FIG 2 drawn. Likewise is in 2 the workpiece edge 42 of the workpiece 40 lying on the removal table 20 is drawn in greater detail. It can be seen that the workpiece 40 has a core 44 and an upper coating 46a and a lower coating 46b. The core 44 may be made of a particleboard wood material, for example. The coatings 46a-b are typically plastic. A workpiece 40 of the in 2 shown type can be used for example for the manufacture of furniture.

It can be seen that the workpiece edge 42 has an in 2 upper first workpiece edge 48a and an in 2 lower second workpiece edge 48b. The two workpiece edges 48a-b run parallel to one another and perpendicular to the plane of the drawing 2 and are adjacent to each other.

The detection device 38 has an illumination device 50 with a first light source 50a and a second light source 50b. The light sources 50a-b can include halogen light sources, LED light sources and/or laser light sources. Furthermore, the detection device 38 has an image detection device 52 with a first CCD sensor 52a and a second CCD sensor 52b. A first beam axis 54a of the first light source 50a is directed towards the first workpiece edge 48a. A second beam axis 54b of the second light source 50b is directed towards the second workpiece edge 48b. A first viewing axis 56a of the first CCD sensor 52a is directed towards the first workpiece edge 48a, whereas a second viewing axis 56b of the second CCD sensor 52b is directed towards the second workpiece edge 48b.

Both the beam axes 54a-b and the viewing axes 56a-b are orthogonal to a longitudinal extent of the workpiece edge 42, which is in 2 perpendicular to the drawing plane. It can be seen that the two viewing axes 56a-b of the CCD sensors 52a-b of the image acquisition device 52 are orthogonal to a center plane 58 of the plate-shaped workpiece 40, and it can be seen that the two CCD sensors 52a-b are relative to the center plane 58 of the plate-shaped workpiece 40 are arranged on opposite sides of the workpiece 40.

The basic principle of operation of the detection device 38 is similar to that which is shown in FIG DE 36 33 089 A1 is described. Accordingly, light which, for example, from the light source 50a strikes the workpiece edge 48a along the beam axis 54a is reflected there. In the case of outliers in the coating 46a and other edge breakouts, the micro-areas produced in this way with different inclinations act as reflectors for the incident light. If such a microsurface were inclined by 45°, the light would be reflected perpendicularly to the beam axis 54a in the direction of the viewing axis 56a. The intensity of the reflected light can be measured by means of the CCD sensor 52a, which allows a precise conclusion to be drawn about the geometric shape of the workpiece edge 48a. In this way, the quality of the workpiece edges 48a-b produced by the sawing unit can be detected by means of the detection device 38 and assessed by corresponding algorithms in the control and regulation device 36 .

How out 3 As can be seen, the entire detection device 38 can be automatically moved parallel to the workpiece edge 42 by means of a drive device (not shown), which is also controlled by the control and regulation device 36 . this is in 3 indicated by a double arrow 60. For this purpose, the detection device 38 is movably guided or mounted, for example, on a linear guide 62 . The movement preferably takes place while the detection device 38 detects the property of the workpiece edges 48a-b by means of the lighting device 50 and the image detection device 52 .

How out 4 can be seen, the entire detection device 38 can automatically, ie by means of a corresponding remote-controlled motor drive device, are moved from a rest position to a working position and back, according to the in 4 drawn double arrow 63. In the in 4 The detection device 38 is located below a support plane 64 of the unloading table 20 by a rest position indicated by a box drawn with a solid line 4 on the other hand, by a working position indicated with a dashed line box, the detection device 38 is arranged so that it can detect the property of the workpiece edges 48a-b of the workpiece edge 42 of the workpiece 40 lying on the unloading table 20, as described above.

The detection device 38 preferably assumes the rest position when detection of a property of the workpiece edges 48a-b of a workpiece 40 lying on the removal table 20 is not desired. This is the case, for example, when the workpiece 40 is to be handled either by the robot 22 or by an operator on the removal table 20 . This occurs, for example, when the workpiece 40 is to be fed back to the sawing line 18 for a further processing operation by the sawing unit.

In order to ensure that the workpiece 40 does not move in an undesired manner during the detection of the property of the workpiece edges 48a-b by the detection device 38, the workpiece 40 can be fixed on the removal table 20 by means of a fixing device 66 on the removal table 20. The fixing device 66 is in the 3 and 4 indicated schematically. As an alternative or in addition to this, in an embodiment that is not shown, the fixing device can also be integrated into the detection device and/or the suction traverse.

At the in 5 Drawn alternative embodiment of a workpiece processing system 10 is the detection device 38 in the area of the feed table 12 and there in turn in the area of the angle ruler 30, so laterally arranged. The workpiece 40 is fixed here while the workpiece edges 48a-b are detected by the detection device 38 by means of the program slide 32 and the collets 34 and by means of a movable aligner 68, which can press the workpiece 40 in the lateral direction against the angle ruler 30. This also makes it conceivable that the detection device 38 is stationary at least during the detection process, whereas the workpiece 40 is moved by the program carriage 32 parallel to the feed direction 35 while the detection device 38 is detecting the workpiece edges 48a-b.

At the in 6 Drawn alternative embodiment of a workpiece processing system 10 is the detection device 38 in the area of the removal table 20, but there laterally in the area of the angle ruler 30 is arranged. A workpiece 40 lying laterally on the removal table 20 can thus be detected by the detection device 38 . If desired, relative movement between the workpiece 40 and the detection device 38 can be effected either by movement of the detection device 38 along the angle ruler 30 or by movement of the workpiece 40 by an operator or by the robot 22 . It is also conceivable, but not shown, for a drive for positioning the workpiece to be integrated into the detection device, by means of which the said relative movement between the workpiece and the detection device can be brought about.

At the in 7 Drawn alternative embodiment of a workpiece processing system 10 is the detection device 38 in the area of the machine table 14, there in turn laterally and / or above arranged.

At the in 8th Drawn alternative embodiment of a workpiece processing system 10, the detection device 38 is arranged in an area 70 separate from the feed table 12, the machine table 14 and the removal table 20, which can be, for example, an intermediate buffer or a storage area. This separate area 70 is in 8th arranged for example in the vicinity of the robot 22 and the unloading table 20 . However, it is also conceivable that this area 70 is arranged more to the side of the feed table 12 or to the side of the machine table 14 .

the 9-12 show various possible configurations of the detection device 38. In 9 For example, the detection device 38 includes an image detection device 52 with two CCD sensors 52a-b, but only a single illumination device 50 with a single light source 50a, which is aimed overall at the workpiece edge 42 of the workpiece 40.

In the variant of 10 the image acquisition device 52 comprises only a single CCD sensor 52a, with which only the upper first workpiece edge 48a can be observed.

The variant of 11 the image acquisition device 52 again includes only a single CCD sensor 52b, with which only the lower second workpiece edge 48b can be observed.

In the variant of 12 the image capturing device 52 again includes only a single CCD sensor 52a, the viewing axis of which, however, is not aligned orthogonally to the center plane 58 of the workpiece 40 in the region of the CCD sensor 52a. Instead, the single CCD sensor 52a is arranged to the side of the edge of the workpiece 42 in the center plane 58 . However, the detection device 38 has two deflection devices 72, in the present example in the form of mirrors, with which the viewing axis 56a or 56b can be aligned orthogonally to the center plane 58 of the workpiece 40 on the workpiece edges 48a-b of the workpiece edge 42.

A method for operating the workpiece processing system 10 using the detection device 38 is described below and with reference to the flowchart in FIG 13 described.

After a start block 74, the panel-shaped workpiece 40 is fed to the processing device in the form of the saw unit in a function block 76 by means of the program fence 32 and/or the robot 22 and the workpiece edge 42 is produced with the workpiece edges 48a-b. Then, in a function block 78 , the workpiece 40 is fed with the workpiece edge 42 to the detection device 38 . In a subsequent function block 80, the viewing axes 56a-b of the image capturing device 52 are aligned with the areas of the workpiece edges 48a-b to be recorded in such a way that they are approximately orthogonal to the center plane 58 of the workpiece 40 in the area of the workpiece edges 48a-b.

In a subsequent function block 82, the beam axes 54a-b of the light sources 50a-b of the lighting device 50 are aligned with the areas of the workpiece edges 48a-b to be detected in such a way that the beam axes 54a-b in the area of the workpiece edges 48a-b are approximately in the center plane 58 of the workpiece 40 and orthogonal to the longitudinal extent of the workpiece edges 48a-b. It is understood that the light sources 50a-b may be in a fixed relationship relative to the CCD sensors 52a-b such that when the light sources 50a-b are aligned, the CCD sensors 52a-b are automatically aligned as well.

In a function block 84, a plurality of images of the workpiece edges 48a-b are then created by means of the image acquisition device 52 with the lighting device 50 switched on. For this purpose, the detection device 38 is moved relative to the workpiece edges 48a-b parallel to them, and the lighting device 50 emits a flash-like light pulse to create an image. Alternatively, the lighting device 50 can also emit permanent light. At least two images are created, with a first image having an end area 86 (see 3 ) of the workpiece edges 48a-b and a second image of a middle region 88 remote from the end region (see also 3 ) of the workpiece edges 48a-b.

In a function block 90, the created images are then automatically evaluated and a property of the workpiece edges 48a-b or the workpiece edge 42 is automatically determined by the control and regulation device 36, for example in the form of a quality index. The method ends in a function block 92.

It is conceivable that already at the beginning of the process, i.e. immediately after the start block 74, the control and regulating device 36 creates a flow chart according to which the workpiece 40 is divided by the sawing unit in such a way that the quality of the workpiece edges is measured at suitable times 48a-b can be determined according to the function blocks 78-90. This has the advantage that the recording can be carried out in a comparatively time-neutral manner and in parallel with other processing steps.

It is also conceivable that the detection device 38 is stationary in the function block 84 and does not move relative to the workpiece 40 .

It is also understood that if the image capturing device 52 has only a single CCD sensor, the quality of only a single workpiece edge 48a or 48b can also be captured or determined, if appropriate.

So that the measuring process can be integrated into the production process with as little loss of time as possible, the control and regulation device can select workpieces in advance based on the pending cutting plans to record the quality at the workpiece edge.

It is advantageous, for example, to use a last strip-shaped workpiece in the first dividing step of a plate-shaped starting workpiece or a respective last sub-workpiece when dividing a strip-shaped workpiece to detect the quality at the workpiece edges. In this case, the workpiece to be checked is positioned in the detection device by the operator or the robot, for example by means of the suction traverse, and fixed by the fixing device.

While the quality of the workpiece edges is recorded by the recording device and automatically assessed by the control and regulation device is, the operator, the robot and the workpiece processing system can already perform other process steps in the production process of the workpiece processing system. Thus, at the same time as the detection and evaluation of the quality of the workpiece edges by the detection device and control and regulation device, further workpieces can already be produced or other partially or completely processed workpieces can be handled by the operator or the robot on the infeed or removal table. Consequently, the detection and evaluation of the quality of the workpiece edges can be integrated into the production process of the workpiece processing system without too great an influence on the productivity of the workpiece processing system.

In order to keep the effort involved in feeding the workpieces and detecting the quality of the workpiece edges by the detection device as low as possible, certain rules for the targeted selection of workpieces to be checked in the forthcoming production sequence are stored in the control and regulating device. For example, only workpieces in the production sequence are selected to record the quality of the workpiece edges if workpieces are to be produced from a plate material that differs from the previous section of the production process and/or a certain interval of a time variable of the tool, for example the operating time, in a corresponding forecast this amount of time is exceeded.

Reference List

10

workpiece processing plant

12

infeed table

14

machine table

16

saw gap

18

saw line

20

unloading table

22

robot

24

robotic arm

26

suction traverse

28

Workspace

30

angle ruler

32

program slider

34

collets

35

feed direction

36

control and regulation device

38

detection device

40

workpiece

42

workpiece edge

44

core of the workpiece

46a-b

Coatings of the workpiece

48a-b

workpiece edges

50

lighting device

50a-b

light sources

52

image capture device

52a-b

CCD sensors

54a-b

beam axis

56a-b

lines of sight

58

midplane

60

Double arrow movement during capture

62

linear guide

63

double arrow 4

64

support level

66

fixing device

68

organizer

70

Section 8th

72

deflection devices

74

begin

76

manufacturing edges

78

Feeding to the detection device

80

Aligning the visual axes

82

Align the beam axis

84

creating the images

90

Determine the property

92

end

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102017103867 A1 [0002]
• DE 3633089 A1 [0002, 0040]

Claims (16)

Workpiece processing system (10) for processing and/or producing a workpiece edge (48a-b) on a panel-shaped workpiece (40), in particular panel-dividing system for dividing at least one panel-shaped workpiece (40), comprising a processing device, in particular a sawing device, and a control and Control device (36) for controlling and regulating the operation of the workpiece processing system (10), characterized in that it has a detection device (38) controlled by the control and regulating device (36) for automatically detecting at least one property of a machined and/or produced workpiece edge (48a-b), wherein the detection device (38) has at least one image detection device (52), wherein a line of sight (56a-b) of the image detection device (52) in the region of the workpiece edge (48a-b) points to an area to be detected the workpiece edge (48a-b) is directed and little at least approximately orthogonal to a plane (58) of the plate-shaped workpiece (40). Workpiece processing system (10) according to claim 1 , characterized in that the detection device (38) is arranged in the area of a removal table (20), preferably attached to the removal table (20) or is integrated into it. Workpiece processing system (10) according to claim 2 , characterized in that the detection device (38) can be moved automatically from a rest position to a working position and back, being arranged in the rest position below a support plane (64) of the unloading table (20) and being arranged in the working position in such a way that it Property of the workpiece edge (48a-b) of a workpiece (40) lying on the removal table (20) can be detected. Workpiece processing system (10) according to at least one of the preceding claims, characterized in that the detection device (38) for detecting the property of the workpiece edge (48a-b) can be moved longitudinally to the workpiece edge (48a-b), it preferably having a drive device, which the detection device (38) can move longitudinally to the workpiece edge (48a-b) while the detection device (38) detects the property of the workpiece edge (48a-b). Workpiece processing system (10) according to at least one of the preceding claims, characterized in that it has a fixing device (66) which can fix the workpiece (40) while the detection device (38) detects the property of the workpiece edge (48a-b). Workpiece processing system (10) according to at least one of the preceding claims, characterized in that the image acquisition device (52) has at least two CCD sensors (52a-b) which, relative to a center plane (58) of the plate-shaped workpiece (40), are on opposite sides of the Workpiece (40) are arranged so that a first line of sight (56a) of the first CCD sensor (52a) to a first workpiece edge (48a) and a second line of sight (56b) of the second CCD sensor to a second and to the first workpiece edge ( 48a) adjacent and parallel workpiece edge (48b). Workpiece processing system (10) according to at least one of the preceding claims, characterized in that the detection device (38) comprises a lighting device (50), with a beam axis (54a-b) of the lighting device in the region of the workpiece edge (48a-b) pointing to the edge to be detected area of the workpiece edge (48a-b) and is at least approximately in the plane (58) of the plate-shaped workpiece (40) and at least approximately orthogonal to a longitudinal extent of the workpiece edge (48a-b). Workpiece processing system (10) according to claims 6 and 7 , characterized in that the lighting device (50) has at least two light sources (50a-b), with a first beam axis (54a) of the first light source (50a) pointing to the first workpiece edge (48a) and a second beam axis (54b) of the second light source (50b) is directed towards the second workpiece edge (48b). Workpiece processing system (10) according to at least one of the preceding claims, characterized in that the image acquisition device (52) comprises a CCD sensor (52a) whose visual axis is not aligned orthogonally to the plane (58) of the workpiece (40), and at least one deflection device (72) for the viewing axis (56a) which aligns the viewing axis (56a) of the CCD sensor (52a) orthogonal to the plane (58) of the workpiece (40) to the workpiece edge (48a-b). Method for operating a workpiece processing system (10), which is controlled and regulated by a control and regulating device (36) and in which a plate-shaped workpiece (40) is fed to a processing device and a workpiece edge (48a-b) of the plate-shaped workpiece (40) is processed and/or produced, characterized in that at least one property of the processed and/or produced workpiece edge (48a-b) is detected by means of a detection device (38), wherein the detection device (38) has at least one image detection device (52), the method further having the following steps: a. Aligning a viewing axis (56a-b) of the image capturing device (52) to an area of the workpiece edge (48a-b) to be recorded in such a way that the viewing axis (56a-b) in the area of the workpiece edge (48a-b) is approximately orthogonal to a plane (58) of the plate-shaped workpiece (40); b. creating at least one image of the workpiece edge (48a-b) by means of the image acquisition device (52) with the lighting device (50) switched on; and c. automatic evaluation of the image created and automatic determination of at least one property of the workpiece edge (48a-b) by means of the evaluation. procedure after claim 10 , characterized in that it further comprises the following steps: aligning a beam axis (54a-b) of an illumination device (50) to the area of the edge (48a-b) to be detected in such a way that the beam axis (54a-b) in the area of the workpiece edge (48a-b) lies at least approximately in the plane (58) of the plate-shaped workpiece (40) and at least approximately orthogonally to a longitudinal extent of the workpiece edge (48a-b), and creating the image of the workpiece edge (48a-b). switched on lighting device (50). Method according to at least one of Claims 10 - 11 , characterized in that the method steps are carried out for different areas of the workpiece edge (48a-b). Method according to at least one of Claims 10 - 12 , characterized in that the image capturing device (52) is stationary relative to the processed and/or manufactured workpiece edge (48a-b) during the creation of the image. Method according to at least one of Claims 10 - 12 , characterized in that the image capturing device (52) moves relative to the workpiece edge (48a-b) during the creation of the image and the lighting device (50) emits a flash-like light pulse for the creation of an image. Method according to at least one of Claims 10 - 14 , characterized in that at least two images are created, a first image showing an end area (86) of the workpiece edge (48a-b) and a second image showing an area (88) of the workpiece edge (48a-b) remote from the end area (86). depicts. Method according to at least one of Claims 10 - 15 , characterized in that it comprises the step: automatic creation of a flow chart by the control and regulation device (36) of the panel processing system (10), which comprises at least the above steps b and c.

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