WOODWORKING DEVICE AND METHOD FOR OPERATION OF SUCH

Description

[0001] The invention relates to a woodworking device according to the preamble of claim 1 and a method for operating such a device.

[0002] In known woodworking equipment 1, such as those used in Figure 1shown and known, for example, from EP 3 281 755 A1, machining heads are used. These can be so-called drilling heads 44 with a plurality of drills that create a specific drilling pattern in a workpiece. Machining heads within the meaning of the invention can, however, also be saw heads with a grooving saw that is capable of creating a groove in the workpiece. If a drilling head or bores are mentioned below, these statements also apply mutatis mutandis to a machining head in general and, above all, to one in the form of a saw head and the grooves created in the workpiece by sawing. In the example shown, the drilling head 44 is mounted on a support crossbeam 41 of a drilling head carrying device 4 so that it can be displaced in the Y direction. The workpieces W1, W2 are aligned on a reference line R and advanced in the X direction in a workpiece transport plane 53, being fed in at P1 and discharged at P2.In the example shown, the workpiece transport plane is parallel to the floor on which the woodworking device 1 is set up. However, there are also vertical machines in which the transport plane 53 runs vertically to the floor. The plate-shaped workpieces W1 and W2 are then transported with their flat sides perpendicular to the floor. A transport device is used to feed the workpieces W1, W2, which in the example shown is represented by the grippers 31 - 34 movable in the direction X. The support cross member 41 spans a support device 5, which can be designed as a table, for example, between the two long sides 51 and 52 of the transport plane 53. The support cross member 41 is in turn mounted on a bearing 42, 43, which is preferably movable in or against the feed direction X, so that the support cross member can move in the direction X.Via a control system 2, an incoming workpiece W1, W2 is machined by means of the drilling head 44 mounted on the support traverse 41, whereby drilling patterns are created, as shown for example in the . Figures 2A to 3B are shown.

[0003] In Figure 2A The arrangement of the drilling head 44 over a workpiece W1 is shown. In the example shown, five holes (black dots) arranged one above the other in the Y-direction are drilled into the workpiece W1. These holes lie on a reference line R at a defined distance from the trailing edge 7 of the workpiece W1. Figure 3A a finished workpiece W1 is shown, in which a corresponding drilling pattern with four holes lying one above the other is shown both in the area of the trailing edge and in the area of the leading edge.

[0004] However, it becomes more problematic when the edges 7 of the workpiece W2 form an angle other than 90° to the feed direction X. This slight inclination is particularly noticeable in the Figure 2B and 3B In such a case, the use of the Figure 1 device shown may result in - as shown in Figure 3Bshown - although all holes lie on a line L with respect to the feed direction X and the transverse direction Y, the distance to the edge varies. The problems described also apply analogously to grooves cut into the workpiece by saw heads or grooving saws. The problems mentioned cannot be solved even if the unit in question is itself pivotably mounted, as is known, for example, from EP 0 608 746 B1, EP 0 933 903 B1, DE 102 44 838 B4 or WO 94 / 04309 A1. In the known devices, a drilling unit or a saw is pivotably mounted on a support crossbeam of a gantry, so that the unit can be rotated relative to the support crossbeam. With this configuration, however, it is not possible to align a multiple drilling head or a grooving saw to an inclined edge of the workpiece.A saw blade positioned at an angle to the feed direction in this way would then be unable to perform a saw cut parallel to the beveled edge of the workpiece when guided in the longitudinal direction of the support crosshead, because the unit would not be guided parallel to the workpiece edge. This problem also arises with a multiple drilling head, because moving the multiple drilling head perpendicular to the feed direction would change the distance of the drilling pattern from the edge across the workpiece.EP 0993 903 B discloses a woodworking device with a processing head, a support device which is designed to support the workpieces, a processing head carrying device, with a support cross member which spans at least part of the workpiece plane of the support device and on which the at least one processing head is arranged, wherein the support cross member is pivotally mounted about a real or imaginary pivot axis which runs perpendicular to the feed direction of the workpiece.

[0005] The object of the present invention is therefore to further develop a woodworking device of the type mentioned at the outset in such a way that drilling patterns or grooves can also be introduced into workpieces with edges that run obliquely relative to the feed direction, in which the holes or grooves have a defined constant distance from the leading or trailing edge.

[0006] This object is achieved by a woodworking device having the features of claim 1 and a method having the features of claim 11. Advantageous embodiments can be found in the subclaims.

[0007] The woodworking device according to the invention is used for processing panel-shaped workpieces made of wood or wood substitutes and has at least one processing head. This can be a drilling head with a plurality of drilling tools for simultaneously drilling a plurality of holes in a workpiece or a saw head with a grooving saw for creating a groove in a workpiece (W1, W2). Furthermore, a support device, preferably a table, is provided, which is designed to support the workpieces. The woodworking device also has a transport device, which can be, for example, a conveyor belt, linearly displaceable grippers or suction cups, or a transport chain. The transport device moves the workpieces on or at the support device along the feed direction in a workpiece transport plane.When the woodworking device according to the invention is designed as a vertical machine, this workpiece transport plane generally runs perpendicular or approximately perpendicular to the ground, e.g. tilted by an angle of 0 to 30° relative to the vertical, while in another embodiment of the woodworking device it is also possible, for example, to design the woodworking device such that the transport plane runs parallel to the ground.

[0008] In addition, the woodworking device has a machining head support device, preferably a gantry. This machining head support device has a support crossbeam spanning at least part of the workpiece transport plane of the support device, preferably in a direction transverse to the feed direction, on which the at least one machining head is arranged. The machining head preferably has a plurality of drills with which a predetermined drilling pattern can be created in the workpiece or - as indicated - a grooving saw for creating a groove in the workpiece. Spanning at least part of the workpiece transport plane means that the support crossbeam must be long enough to allow the machining head to be moved across the entire spatial extent of the workpieces to be machined. In other words, the machining head should be able to reach the entire surface of a plate-shaped workpiece.

[0009] According to the invention, it is now provided that the support cross member is pivotably mounted about a real or imaginary pivot axis running perpendicular to the feed direction and perpendicular to the workpiece transport plane of the workpiece.

[0010] In this way, the support crosshead and thus ultimately also the machining head can be pivoted parallel to the workpiece transport plane. In this respect, it is possible to rotate the drilling pattern parallel to the workpiece transport plane and thus adapt it to a workpiece edge that runs diagonally to the transport direction, so that all holes are at a defined distance from the edge. Advantageously, the support crosshead can be pivoted in a first pivoting direction and / or in a pivoting direction opposite to the first pivoting direction by angles in the range from greater than 0° to 10°, preferably up to 5°, most preferably up to 3°, compared to a zero position in which the main longitudinal extension direction of the support crosshead runs parallel to the transverse direction and perpendicular to the feed direction. Small pivoting angles are generally required, since the pivoting of the support crosshead is preferably a fine adjustment.

[0011] For this purpose, the woodworking device preferably has a control system which is designed to control at least one drive or a plurality of drives which cause the support cross member to pivot about the pivot axis.

[0012] Advantageously, a workpiece detection device is arranged upstream of the machining head support device, which detects the external shape of an incoming workpiece, in particular the angle of a narrow side of the workpiece to a predetermined reference line. An incoming workpiece can be measured in such a way that the control system can then pivot the support crosshead accordingly using this information. Technically, this can be implemented by the control system communicating with the workpiece detection device in such a way that the workpiece detection device forwards the external shape of the workpiece it has determined to the control system in the form of data. In response to the data thus received, the control system determines a corresponding pivot angle for the support crosshead and controls the drive so that this causes the support crosshead to pivot about the pivot axis by the previously determined pivot angle.

[0013] Of course, it is also possible to process data stored in advance in the control system regarding the dimensions and / or angles to a reference line or reference plane of the incoming workpieces and to set an angular position of the support traverse accordingly.

[0014] Advantageously, the machining head is displaceably mounted along the support cross member so that drilling patterns or grooves can be introduced at all positions on the workpiece according to the corresponding specifications. Alternatively or additionally, it can be provided in particular that the machining head is designed to be displaceable in the direction of the workpiece transport plane or away from it, in particular linearly. Alternatively or additionally, it can be provided that the support cross member is displaceably mounted on a machine bed of the woodworking device or on the machine bed or on bearing cross members mounted immovably relative to a support floor. The invention is therefore also suitable for vertical machines in which the plate-shaped workpieces are guided upright through the woodworking device.

[0015] According to a further preferred embodiment, the support cross member can have a main longitudinal extension dimensioned such that the support cross member spans the support device, preferably in a direction transverse to the feed direction, by at least 50%, preferably 70%, and most preferably completely. The invention is primarily used in gantry machines in which the cross member of the gantry is simultaneously the support cross member.

[0016] Furthermore, the machining head can be mounted on the support traverse in a rotationally fixed manner. Unlike fixtures with a swivel head, the machining head does not require any independent pivoting due to the pivotability of the support traverse.

[0017] The support cross member can also be rotatably mounted directly on a machine bed of the woodworking device or directly on bearings arranged on the machine bed or a support floor.

[0018] The invention further relates to a method for operating the woodworking device described above, in which the following steps are carried out: Placing a workpiece and transferring it to the support device, preferably by placing it on a table of the support device; aligning the workpiece relative to a reference line; pulling in the workpiece; detecting and / or reading data relating to the external shape of the workpiece, in particular the angle of at least one side of the workpiece to the reference line; transporting the workpiece by means of the transport device in a feed direction (X) within a workpiece transport plane to the machining head support device; adjusting a pivoting angle of the support crosshead as a function of the previously determined or read-out data and creating a plurality of bores corresponding to a predetermined drilling pattern or a groove in the workpiece by means of the machining head.

[0019] The invention will be explained below by means of exemplary embodiments using the Figures 4 to 6A explained in more detail.

[0020] The Figures 1 to 3B illustrate the state of the art described above. Figure 1 shows a plan view of a woodworking device according to the prior art. Figure 2A shows a top view of a plate-shaped workpiece with an edge perpendicular to a reference line when creating a drilling pattern. Figure 2B shows a top view of a plate-shaped workpiece with an edge not perpendicular to a reference line when creating a drilling pattern. Figure 3A shows a top view of a plate-shaped workpiece with an edge perpendicular to a reference line after creating a drilling pattern. Figure 3B shows a first plan view of a plate-shaped workpiece with an edge not perpendicular to a reference line after creating a drilling pattern. Figure 4 shows a plan view of a woodworking machine according to a first embodiment of the invention. Figure 5shows a side view of a woodworking machine according to a second embodiment of the invention. Figure 6A shows a plan view of a plate-shaped workpiece with an edge perpendicular to a reference line after creating a drilling pattern using a woodworking machine according to the invention. Figure 6B shows a plan view of a plate-shaped workpiece with an edge inclined to a reference line after creating a drilling pattern using a woodworking machine according to the invention.

[0021] Firstly, it should be noted that in order to avoid repetition, the components of the device according to the invention described above and the reference numerals used in the Figures 1 to 3Bhave the same meaning as in the following description of the embodiments according to the invention. In this respect, the following also applies: Where reference is made to a drilling head or bores, these statements also apply mutatis mutandis to a machining head in general, and especially to one in the form of a saw head, as well as to the grooves cut into the workpiece by sawing.

[0022] A first embodiment of the woodworking device 1 according to the invention is shown in Fig. 4 A classic design is shown, in which the support device 5 is, in the simplest case, a table on which the workpieces W1 and W2 are placed and moved in the feed direction X in the transport plane 53. In this respect, Fig. 4a plan view of the woodworking device 1. A workpiece W1, W2 is accordingly fed in the direction P1 and placed on the table 5 and transported in the feed direction X in a workpiece plane 53 to a processing head carrying device 4 via transport devices 31 - 34 (e.g. in the form of grippers or suction clamps) displaceable in the feed direction X. This comprises a support cross member 41, which is mounted on bearings 42 and 43 and carries the processing head 44, which can preferably be displaced parallel to the support cross member 41. According to the invention, this support cross member 41 can be pivoted about the axis A, as indicated by the double arrow P3.A workpiece detection device 8 is arranged upstream of the machining head support device 4, which is coupled to the controller 2 and preferably carries a camera or a scanner 81, which detects an incoming workpiece W1, W2 and in particular determines whether leading or trailing edges of the workpiece are at an angle to a reference line R. This information is then passed on to the controller 2, which pivots the support crosshead 41 about the real or imaginary pivot axis A in accordance with the angle between an edge of the workpiece W1, W2. The drilling head 44 is thus also pivoted accordingly, so that the drilling pattern adapts accordingly. The workpieces resulting from this procedure can be found in the . Fig. 6A(vertical edge 7) and 6B (edges 7 running obliquely to the reference line R). The woodworking device 1 according to the invention can thus ensure that the holes 6 lie on the specified lines L due to the pivotable support cross member 41.

[0023] Accordingly, this is also possible with vertical machines, such as those from Fig. 5 can be seen. Shown here is a side view of a further embodiment of the woodworking device 1 according to the invention. The workpieces W1, W2 are transported with their surfaces perpendicular to the ground in the feed direction. Accordingly, the transport devices 31-34 must be designed for such transport. This requires, as in the example according to Fig. 4that the support cross member 41 of the drill head carrying device 4, which can also be pivoted about a virtual or imaginary pivot axis A in the direction of arrow P3, must be pivotable in a plane parallel to the workpiece transport plane 53. In the example shown, this is preferably implemented such that the support cross member 41 is pivotally mounted on bearing sections 45, 46 which are displaceable in the direction of the straight double arrows in the direction Y. The bearing sections 45, 46 are each displaceably mounted in the direction Y via the controller 2 along the bearing cross members 47, 48 extending in the direction Y. If the bearing sections 45, 46 can be displaced via the controller, preferably independently of one another, each point on the surface side of the workpiece W1, W2 can be approached and machined by the machining head 44 which is displaceable along the support cross member 41.In addition, an angular position of the support crossbeam to the reference line can be set according to control 2.

Claims

1. Woodworking device (1) for processing plate-type workpieces (W1, W2) of wood or wood substitutes, having at least one processing head (44) wherein the processing head is a drilling head (44) with a plurality of drilling tools for simultaneously introducing a plurality of bore holes (6) into a workpiece (W1, W2) or a sawing head with a grooving saw for introducing a groove into a workpiece (W1, W2), a supporting device (5), preferably a table (5), which is configured to support the workpieces (W1, W2), a transport unit (31-34) which moves the workpieces (W1, W2) on the supporting device (5) along the feed direction (X) in a workpiece transport plane (53), a processing head carrying device (4), preferably a portal (4), having a support crossbeam (41) which spans the at least one part of the workpiece transport plane (53) of the supporting device (5), preferably in a direction (Y, Z) transversely to the feed direction and on which the at least one processing head (44) is arranged, wherein the support crossbeam (41) is mounted for pivotal movement about a real or imaginary pivot axis (A) running perpendicular to the feed direction (X) and perpendicular to the workpiece transport plane (53) of the workpiece (W1, W2).

2. Woodworking device (1) according to Claim 1 characterised in that it has a control (2) which is configured to control at least one drive, or a plurality of drives, which activates the pivotal movement of the support crossbeam (41) about the pivot axis (A).

3. Woodworking device (1) according to Claim 1 or 2 characterised in that the processing head (44) is mounted in displaceable manner along the support crossbeam (41) and / or the support crossbeam (41) is mounted in displaceable manner on a machine bed of the woodworking device (1) or on bearing crossbeams (47, 48) which are mounted immovable on the machine bed or opposite a support base.

4. Woodworking device (1) according to one of the preceding claims characterised in that the support crossbeam (41) has a main longitudinal extension direction which is measured such that the support crossbeam (41) spans the supporting device (5) up to at least 50%, preferably up to 70% and most preferably completely, preferably in a direction (Y, Z) transversely to the feed direction.

5. Woodworking device (1) according to one of the preceding claims characterised in that the processing head carrying device (4) is mounted behind a workpiece capture unit (8) which captures the exterior form of an incoming workpiece (W1, W2), in particular the angle of a narrow side (7) of the workpiece (W1, W2) to a predetermined reference line (R).

6. Woodworking device (1) according to Claims 2 and 5 characterised in that the control (2) communicates with the workpiece capture unit (8) in such a way that the workpiece capture unit (8) forwards the exterior form of the workpiece (W1, W2) determined by it in the form of data to the control and the control in response to the data thus received determines a corresponding pivotal angle for the support crossbeam (41) and controls the drive so that the latter activates the pivotal movement of the support crossbeam (41) about the previously determined pivot angle about the pivot axis (A).

7. Woodworking device (1) according to one of the preceding claims characterised in that the processing head (44) is configured to move in the direction of the workpiece transport plane (53) or away from the latter, in particular in linear manner.

8. Woodworking device (1) according to one of the preceding claims characterised in that the processing head (44) is mounted secured against rotation on the support crossbeam (41).

9. Woodworking device (1) according to one of the preceding claims characterised in that the support crossbeam (41) is mounted in rotatable manner directly on a machine bed of the woodworking device (1) or directly on bearings mounted on the machine bed or a support base.

10. Woodworking device (1) according to one of the preceding claims characterised in that the support crossbeam (41) is capable of moving in relation to a neutral position, in which the main longitudinal extension direction of the support crossbeam (41) runs parallel to the transverse direction (Y) and perpendicular to the feed direction (X), in a first pivot direction or / and in a second pivot direction opposite the first pivot direction, about an angle in the range from greater than 0° to 10°, preferably up to 5° and most preferably up to 3°.

11. Method for operating a woodworking device (1) according to one of the preceding claims characterised by the following steps: - delivering a workpiece (W1, W2) and transferring it to the supporting device (5), preferably by placing it down on a table of the supporting device (5); - aligning the workpiece (W1, W2) relative to a reference line (R); - drawing in the workpiece (W1, W2); - capturing and / or reading data relating to the exterior form of the workpiece (W1, W2), in particular the angle of at least one side (7) of the workpiece (W1, W2) to the reference line (R); - transporting the workpiece (W1, W2) by means of the transport unit (31-34) in a feed direction (X) within a workpiece support plane (53) to the processing head carrying device (4); - adjusting a pivot angle of the support crossbeam (41) in dependence on the previously determined or retrieved data; and - introducing a plurality of bore holes (6) according to a predetermined drilling pattern or at least a groove into the workpiece (W1, W2) by means of the processing head (44).