DE3442466A1 - Method and apparatus for producing elongated wooden articles profiled at both ends - Google Patents

Abstract

Method of producing elongated wooden articles profiled at both ends and in each case having a desired length, in particular frame parts for windows and doors, in which method elongated wooden workpieces are fed to an end-profiling machine and are positioned therein in their longitudinal direction relative to at least one profiling tool and are conveyed transversely to their longitudinal direction and in the process are profiled at their ends, preferably by routing, the positioning and transverse conveying being carried out with workpieces cut to the respective desired length.

Description

Method and apparatus for manufacturing

of elongated wooden objects profiled at both ends Die Invention first relates to a method of making both ends profiled elongated wooden objects each of the desired length, in particular Frame sections for windows or doors, in which elongated wooden workpieces a End profiling machine fed and therein relative to at least one profiling tool positioned in their longitudinal direction and conveyed transversely to their longitudinal direction and are profiled at their ends, preferably by milling.

The invention also relates to a device for performing the Method, with an end profiling machine, in which a cross conveyor for Conveying the workpieces across their length, at least one Tool unit arranged to the side of the transverse conveyor device and a positioning device for positioning the workpiece to be machined in its longitudinal direction are provided relative to the tool assembly.

In known methods and devices of the specified type set the desired length for the finished wooden object in that the Workpieces with excess length are entered into the end profiling machine and before each profiling process in the positioning determined and specified for profiling by means of a the saw associated with the profiling tool in question are shortened; it closes If the workpiece remains unchanged in the relevant positioning, the Often the finished profiled end then serves as a zero length dimension for a subsequent machining of the other end of the workpiece, being in the same Way the workpiece is set in a certain longitudinal position and in the set State transported in the transverse direction and abbreviated again one after the other and is profiled.

In this well-known way of working, one obviously starts from the imagination from that by maintaining a fixed longitudinal position of the workpiece during the shortening and the one immediately afterwards on the same tool assembly Profiling ensures that the profiling depth is only due to the relative position is determined by profiling and sawing tools. So that the working method described is possible for all workpieces, the workpieces must enter the end profiling machine have sufficient excess length and must be shortened of the first Part of the excess length can be left at the end for shortening the second end, so that the shortening process can be carried out cleanly at the other end.

The idea that the end of the The workpiece is abbreviated one after the other when the workpiece is fixed in the longitudinal direction and must be profiled, has been established in the professional world for years, and accordingly Known end profiling machines always have tool assemblies that are based on as much as possible a shortcut saw and an associated profiling tool.

The working method described offers the one already mentioned fundamental advantage that between the abbreviations determining the desired length and profiling does not take into account workpiece movements in the longitudinal direction of the workpiece need to be, but are to change to other profiling depths and desired Lengths relatively many and cumbersome positioning movements between the Abbreviation tool and the profiling tool required; when working on both sides End profiling machines are correspondingly more positioning devices for the abbreviation and profiling tools required.

There is also the disadvantage that counter-timbers that are on the Cross conveyor are attached, depending on the setting of the Cutting tool can be sawn off to different lengths; this leads to tenoning this means that the counter timber is sawn off to the shortest tenon length and when cutting longer pins of the same basic profile no longer fully support the pins can. In addition, shortening creates a relatively large amount of waste.

The present invention is based on the object of a kind of mutual To create end machining in which the change between different profiling depths and desired lengths possible more easily and quickly and a higher working speed can be achieved.

According to the invention, this object is achieved with regard to the method solved with a method of the type specified at the outset, which is characterized is that in the end profiling machine the positioning and cross conveying with on the each desired length of cut-to-length workpieces is carried out.

Accordingly, with regard to the device, the object is achieved according to the invention solved with a device of the type specified above, which is characterized is that the positioning device for positioning workpieces that are already are cut to the desired length, and for reference to an end face of the workpiece is set up.

According to the invention, there is no longer any shortening (sawing) during cross conveying, but only profiled. As a result, they can come into action during cross conveying Tool assemblies be constructed more simply; in particular, they can be free of abbreviation tools and positioning movements between components of one and the same tool assembly omitted. Since the supplied workpieces are cut to length and, accordingly, smooth end faces can do the positioning required for profiling in the longitudinal direction of the workpieces is made with reference to each of the two end faces of the workpieces will. It is in cases where the profiling is carried out one after the other on the first and the second end of the workpiece takes place, particularly advantageous if the workpiece positioned relative to the profiling tools with reference to its second end will. You then do not need the finished profiled first end as a stop To use formation of a length zero value; in this from the prior art known working method, it can happen that the finished profiled end when striking is damaged and / or forms a stop surface that is too small and / or processing errors that make the length zero value formed by the stop unsafe.

In an embodiment of the invention, it is expedient that the workpieces during their feeding to the end profiling machine on each desired length can be cut. Storage is not required, the lengths of the workpieces can be selected directly according to current requirements and you only need a single saw, so that the construction costs are low is. The end profiling machine is no longer used for shortening as it was before and profiling, but only used for profiling, and the abbreviations and Cutting to length is relocated to the loading process of the end profiling machine.

This separation between sawing and profiling is also a more liberal design of the sawing and profiling tools possible. It is in the generally be expedient to the workpieces as they are being fed to the end profiling machine to promote in their longitudinal direction.

This corresponds to the state of the art. In the present invention this has the advantage that the cutting to length work taking place during feeding be carried out on a continuous strand of workpieces or semi-finished products can, so complex movement devices for the workpieces are not required are.

In particular, the workpieces can be conveniently used several times longer semi-finished products can be cut to the desired length. This is needed you only have one saw cut per workpiece, and the waste is very little.

It is particularly useful if the cutting to length is started in cycles stationary Work pieces. It is relatively easy to advance the brought up To interrupt workpieces for cutting to length; this has the advantage a higher cutting accuracy. Furthermore, on the stationary workpiece further work can be carried out easily; at all when cutting to length or between the cutting to length and the end profiling machine, further operations on the workpieces be carried out so that the end profiling machine is free of additional tools remain.

The separation provided according to the invention between lengths and End profiling enables an optimal design of the corresponding devices and higher working speeds for both cutting to length and final profiling, so that overall a higher working speed can be achieved.

In the device according to the invention, a particularly simple one is obtained robust construction and precise operation in a configuration in which how in the prior art, a loading device connected upstream of the transverse conveyor device it is provided in which output workpieces are conveyed in their longitudinal direction; According to the invention, the loading device has a cyclic one Cutting device with a sawing tool and one relative to it in the longitudinal direction of the tool effective positioning drive. In this way the positioning drive forms part of the cutting device for moving the workpieces to the end profiling machine Longitudinal conveyor devices that are required anyway.

The cutting device can be arranged in a stationary manner.

It is particularly advantageous if the positioning drive is a part the positioning device forms and the finished cut workpiece in a for the profiling suitable longitudinal position of the cross conveyor is available represents. This results in a further simplified design with higher operational reliability.

As already mentioned above, in the loading device further adjustable processing tools can be provided, in particular caulking, Drilling or milling units, so that during loading, that is outside of the end profiling machine, further work can be carried out on the workpiece. It is particularly useful if the input of the end profiling machine is a Intermediate station for the further processing of the cut workpieces is. Since at this point the workpieces are already cut to length and preferably Position-specific further processing can be stopped during further processing can be carried out with high accuracy.

The invention offers particular advantages in so-called right-left machines, in which the end profiling machine one in the cross conveying direction against the tool assembly offset second tool unit for the end profiling of the second end of the Has workpiece and between the two tool units a part of the Positioning device forming longitudinal transport device is provided, which the workpiece profiled at its first end into one for profiling the second End positioned by means of the second tool assembly suitable longitudinal position; According to the invention, the longitudinal transport device has one at the second end of the workpiece attacking and retractable after the positioning longitudinal transport has ended Slide open. This design is possible1 because the second one, which has not yet been profiled The end is already cut to length and a smooth one, as a reference value for determining the length Has a suitable face. In this embodiment, the end of the Positioning of the workpiece before the second final profiling is not the same as with the stand the technology by a cooperating with the already profiled first end Stop, but determined by the slide. This means that they are already further ahead Avoided possible errors mentioned, which can stem from the fact that the already profiled first end does not represent a defined surface for the stop and / or Has processing errors and / or damaged when striking will.

As can be seen without further ado, those according to the invention are suitable The method and the device according to the invention are very good for a fully automatic Way of working. First the desired length and then profiling without any further Changes in length are made, are the positioning movements and their Execution of the necessary control and computing programs simplified.

The invention is illustrated below with reference to exemplary embodiments in Connection with the drawing explained in more detail.

Fig. 1 shows schematically a typical one in an end profiling machine Workpiece machined according to the state of the art.

Fig. 2 shows schematically the workflow in the invention Method during the loading of the end profiling machine according to the invention Contraption.

Fig. 3 shows schematically the use of the invention in a one-sided Machine.

Fig. 4 shows schematically the use of the invention in a double-end tenoner.

Fig. 5 shows the use of the invention in a left-right machine.

Fig. 6 shows schematically one provided with additional tools Loading device of a device according to the invention.

FIG. 7 shows a processed in the loading device according to FIG Workpiece.

FIG. 8 shows a representation similar to FIG. 3, but with one additional detail.

FIG. 9 shows the same representation as FIG. 8, but in a different manner Operating position.

Before closer to the details shown in the drawings is received, it should be noted that each of the features described for itself or in connection with features of the claims that are essential to the invention is.

The workpiece 10 shown in Fig. 1 is profiled at the ends. The maximum milling depth is designated by Zl or Z2. Its nominal length is L and its initial length is denoted Lo. The initial length Lo is dash-dotted indicated. It can be seen that sections Al resp.

A2 must be cut off with a saw before milling. A finished one Workpiece 10 serves e.g. as part of a window or door frame. The ones to be used Workpieces are drawn in a corresponding manner.

In Fig. 2 only a single milling cutter 11 is shown, which to belongs to a milling unit of a final profiling machine.

A one-sided machine can get by with one milling unit; one two-sided machine requires at least two milling units. One tangent to the Circle which is formed by the zero diameter of the milling tool 11 is indicated by 12 denotes and forms the reference line for the processes described below. A saw 13 with a saw blade 14 and a drive 15 is located in one loading device not shown further. The saw is on the side or in adjustable in height, the plane defined by the saw blade 14 is to the reference line 12, on the other hand, is fixed. The distance to the reference line is denoted by K. s called the width of the saw groove.

A semi-finished rod 16 that has already been machined in the longitudinal direction can, has the length 101. It is from a longitudinal conveyor device, not shown with positioning drive to the reference line 12 advanced cyclically. In the upper Illustration of the rod 16 has the rear end of the rod 16 to the reference line the distance X32. It is assumed that the rod 16 is divided into three workpiece lengths with the nominal lengths L1, L2 and L3.

Every workpiece should be milled at each end. Exist accordingly Milling depths Z13 and Z231 Z12 etc.

In the upper representation of the rod 16 there is a section of the front workpiece. The gate is labeled A2. After the saw 13 the Cut, it goes back to the starting position. Then pushes a not shown feed the rod 16 by the workpiece length L3 plus one from the saw blade 14 cut away dimension before performing a second sawing operation. This can be seen in the second illustration of the rod 16 from the top. The first workpiece is now brought to the target length L3. After the sawing operation, the longitudinal conveyor switched on again and pushes the cut first workpiece with the remaining bar into the feeding station, not shown, of the end profiling machine, precisely in position relative to the milling tool 11, i.e. with the desired milling depth. Neither do they Cross conveyor shown conveys the first workpiece now in the direction of arrow 17 through the profiling machine, so that the milling tool 11 machined the right end of the workpiece to the specified milling depth. This initial state is shown in the third illustration from above.

After the first workpiece has been conveyed away transversely, the promotes Longitudinal conveyor the remaining rod by an amount that the middle workpiece can be cut to the desired length. Its front end is already being cut to length of the first workpiece is sawed off flush, therefore does not require any sawing more. The process described continues until the last one is positioned Workpiece in the loading station, with a Section A1 incurs as waste. It is understood that the sections A1 and / or A2 can have length zero if the semi-finished rods are already flush on the ends are sawed off.

Fig. 3 shows the extremely schematic representation of a one-sided Tenoning machine with a milling unit 20 on which a milling tool 21 is shown is. The milling unit 20 is stationary. The cross conveyor is of a Running table 22 is formed on which a workpiece can be clamped in position. This is indicated by dash-dotted lines at 23. A counter profile attached to the running table 22 is denoted by 24. A slide table 25 is connected to the running table 22 in aligned with its starting position. He has a slide 26 of a Positioning drive, not shown, is driven in the direction of the double arrow 27

A sawing tool 28 is assigned to the slide table 25, which, in order to make room to create for the saw blade is interrupted in this area. The distance of the Saw blade from the reference line, which passes through the zero diameter of the milling tool 21 is formed (see FIG. 2), is again designated by K. He is bigger than the maximum milling depth Zmax A bar from which several workpieces are cut is automatically fed into the loading device shown in a manner not shown promoted, for example with the help of suitable rollers or conveyor belts. at This conveying process, the rod is placed against the slide 26 with one end. If the rod is fed in in the positioning direction, e.g.

by a conveyor belt according to FIGS. 8 and 9, is the positioning slide e.g. designed to be raised and lowered. The workpiece is advanced so far that the rear end is in front of the positioning slide. The slide 26 has a protruding one Slide section 29. The individual operations are carried out in such a way that as was explained with reference to FIG. Since the device is after Fig. 3 is a one-sided machine, it is necessary after milling a The end and the return of the running table 22 to the starting position, the To turn workpiece 23 over. For positioning, i.e. for setting the current A separate stop is required for the milling depth. Alternatively, the slide can also be used 26 can be selected, which advances the remaining bar so far that when the workpiece is in contact 23 the desired milling depth is set at the front end of the remaining bar. Around to avoid a collision of the counter profile 24 with the remaining rod and to prepare to dimensions Z2> Z1 this is preferably set back by a small amount, before the running table 22 is set in motion again.

Fig. 4 shows a known double-end tenoner 30 with milling units 31 and 32, the distance between which is adjustable. Furthermore, chain tracks 33, 34 is provided, which is also relative together with the associated milling tool are adjustable to each other. The chains contain drivers and counter profiles 35. A loading device is constructed in accordance with that of FIG. 3. There are therefore the same parts have been given the same reference numerals.

In addition, a transfer device 36 is provided in which the Slide 26 enters the cut tool and from which the Doppelendprofilerkettç take over the workpieces without a lateral shift taking place.

In the transfer device 36, the workpieces are with respect to the Milling units 31, 32 already positioned.

The loading device in Fig. 5 is again similar to that of the Figures 3 and 4, so that the same reference numerals are used again. Fig. 5 shows extremely schematic of a so-called "left-right machine" with a first milling unit 40 and a second milling unit 41, each on one side of a cross conveyor 42 are arranged for the workpieces. The milling units 40, 41 are offset from one another in the conveying direction. Line 43 is the input or Loading line on which the workpieces are positioned for the first milling unit 40 be handed over. After the transfer, they are placed on the cross conveyor device 42 clamped so that one end of the workpiece is milled to the desired depth.

After reaching a middle handover line 44 is a clock step the cross conveyor ends and it stops temporarily. On the same Side of the transverse conveyor device 42 like the milling unit 41 is at the level of the middle one Transfer line 44 arranged a longitudinal transport device, of which only one Positioning slide 45 is shown which is actuated by a positioning drive. In the rest position, the positioning slide 45 detects the workpiece on the transfer line 44 the facing end and shifts it a length that the other end of the Workpiece is positioned with respect to the milling unit 41. To that end is on the side of the transverse conveyor device 42 opposite the slide 45 Sliding table 46 arranged.

The workpiece is then placed on the cross conveyor again 42 clamped and driven through the next milling station. At the removal line 47 arrived, the workpiece machined at the ends is removed in a known manner.

In Fig. 6 only the loading device is shown how it is used in the embodiments according to FIGS. The reference signs are again the same.

The sawing tool 28 is adjustable in height. Additionally are the sliding table 25 a drilling unit 50 and a glazing bead miter cutter 51 are assigned. The drilling unit 50 is adjustable in the direction of the double arrow 52 in the longitudinal direction, while the Miter cutter 51 is adjustable in height to get out of the range of longitudinally conveyed workpieces to be driven out. As the saw 28 cuts the conveyed workpieces to the target length length, the workpieces advanced by the positioning slide 26 have relative to the saw 28 a predetermined position, so that it is also with regard to the miter cutter or the drilling tool 50 has a fixed position. Before or after sawing therefore, the desired milling and drilling operations can be performed like this with reference to the workpiece according to FIG. 7 is indicated by mitres 53, 54 and a Blind bore 55. It goes without saying that the positioning slide 26 also has other intermediate positions can be approached to desired machining with the miter router or Drilling unit.

As far as FIGS. 8 and 9 coincide with FIG. 3, the same reference numerals are used used. Instead of a sliding table, a conveyor belt 60 is provided, which according to both directions is recoverable. This is on the long side Workpiece 23 against a ruler 61, which is also provided in FIG. 3.

On the side of the saw opposite the positioning slide 26 28, a sliding portion 62 is provided.

It can also be formed by a conveyor belt that synchronously is driven with the conveyor belt 60.

After the workpiece 23 has been positioned on the running table 22 it is clamped e.g. by means of clamping rams, which are indicated by dashed lines at 64 (Fig. 8).

Then conveyor belt 60 and slide 26 travel together in the direction Arrow 65 back to free space for the counter profile 24 when the running table 22 Advances.

Claims (14)

Claims 1. A method for producing profiled at both ends elongated wood objects of the desired length, in particular frame parts for windows or doors, in which elongated wooden workpieces of an end profiling machine fed and therein relative to at least one profiling tool in its longitudinal direction positioned and conveyed transversely to their longitudinal direction and thereby at their ends be profiled, preferably by milling, characterized in that the positioning and cross conveying is carried out with workpieces cut to the required length in each case will. 2. The method according to claim 1, wherein the profiling successively takes place at the first and the second end of the workpiece, characterized in that that the workpiece with reference to its second end relative to the profiling tool is positioned. 3. The method according to claim 1 or 2, characterized in that the Workpieces - while they are being fed to the end profiling machine, to the desired one Length can be brought. 4. The method according to claim 3, characterized in that the workpieces conveyed in their longitudinal direction while they are being fed to the end profiling machine will. 5. The method according to claim 4, characterized in that the workpieces cut to length from a semi-finished product that is several times longer will. 6. The method according to any one of claims 3 to 5, characterized in, that the cutting to length takes place cyclically on stationary workpieces. 7. The method according to any one of claims 3 to 6, characterized in, that in the cutting to length or between the cutting to length and the end profiling machine more Operations are carried out on the workpieces. 8. Device for performing the method according to one of the preceding Claims, with a final profiling machine, in which a transverse conveyor for Conveying the workpieces transversely to their longitudinal direction, at least one to the side Tool assembly arranged across the conveyor and a positioning device for positioning the workpiece to be machined in its longitudinal direction are provided relative to the tool assembly, characterized in that the Positioning device for positioning workpieces that have already been cut to the required length and is configured to refer to an end face of the workpiece. 9. Apparatus according to claim 8, characterized in that the tool assembly is free of shortcut tools. 10. The device according to claim 8 or 9, with one of the cross conveyor upstream loading device, in the output workpieces in their longitudinal direction be promoted, characterized in that the charging device is cycled working cutting device with a sawing tool (28) and one relative to it Has effective positioning drive in the longitudinal direction of the workpiece. 11. The device according to claim 10, characterized in that the Positioning drive forms part of the positioning device and the finished cut Workpiece in a longitudinal position suitable for profiling the cross conveyor provides. 12. Apparatus according to claim 10 or 11, characterized in that that the loading device has further adjustable processing tools (50, 51), in particular mortising, drilling or milling units. 13. The apparatus according to claim 12, characterized in that the Entrance of the end profiling machine an intermediate station for further processing the finished cut workpieces is connected upstream. 14. Device according to one of claims 8 to 13, wherein the end profiling machine a second tool assembly offset in the transverse conveying direction against the tool assembly for the end profiling of the second end of the workpiece and between the two tool assemblies a longitudinal transport device forming part of the positioning device is provided that the profiled at its first end workpiece in a for the profiling of the second end by means of the second tool assembly is suitable Positioned longitudinal position, characterized in that the longitudinal transport device (45) one that engages the second end of the workpiece and positions it after the end of the positioning Has longitudinal transport retractable slide (45).