EP4008507A1 - Method for sawing at least one workpiece - Google Patents

Abstract

Method for sawing up at least one workpiece (1), the workpiece (1) being sawn up according to a cutting plan (2) by means of at least one cut-off saw (4) of a panel dividing system (5), the cutting plan (2) having a first cutting line (6) or several has mutually parallel first cutting lines (6) and a second cutting line (7) or several mutually parallel second cutting lines (7), the second cutting line(s) (7) in the cutting plan (2) running orthogonally to the first cutting line(s) (6). , and wherein the workpiece (1) is first sawed into workpiece strips (8) along all first cutting lines (6) of the cutting plan (2) and then the workpiece strips (8) are cut into workpiece parts (9 ) are sawn up, the workpiece (1) along at least one hem line (10) of the cutting plan (2) running parallel to the second cutting line(s) (7) by means of a trimming tool (11) of the panel dividing system ( 5) is trimmed before the workpiece (1) is sawed along the first cutting line (6) or the first of the first cutting lines (6).

Description

The present invention relates to a method according to the preamble of patent claim 1.

In the prior art, for example, it is from the EP 2 422 944 B1 It is known to first saw a workpiece in the form of a plate or a stack of plates along first cutting lines of a cutting plan into workpiece strips and then to saw these workpiece strips along second cutting lines of the cutting plan into workpiece parts. The first cutting lines run orthogonally to the second cutting lines in the cutting plan. All sawing processes are carried out first along the first cutting lines and then the sawing processes along the second cutting lines. In the EP 2 422 944 B1 is spoken of a first and a second process section. In the first stage of the process, all sawing processes are carried out along the first cutting line, and in the second stage of the process, all sawing processes are carried out along the second cutting line.

The workpieces to be sawn usually have to be trimmed at their edges, since the outer edges of the original raw panels are often damaged and are usually never sufficiently straight and clean.

In the EP 2 422 944 B1 These trimming processes are performed together with the first cutting lines in the first process section and together with the second cutting lines in the second Process section carried out. This also corresponds to a common procedure in practice.

The object of the invention is now to optimize generic methods in such a way that the division of the workpieces into workpiece strips and then into workpiece parts takes place as quickly and efficiently as possible.

The invention proposes a method according to patent claim 1 for this purpose.

It is therefore provided according to the invention that the workpiece is trimmed along at least one hem line of the cutting plan running parallel to the second cutting line(s) using a trimming tool of the panel dividing system before the workpiece is sawed along the first cutting line or the first of the first cutting lines.

It is therefore a basic idea of the invention to carry out at least one trimming process along a hem line parallel to the second cutting lines before starting to saw the workpiece along the first cutting line or, if the cutting plan has several first cutting lines, the first of the first cutting lines into workpiece strips. As a result, a straight and clean outer edge is produced on the workpiece with a single trimming operation along a single hem line before the sawing along the first cutting line(s), which means that all workpiece strips already have a trimmed, clean outer edge after the workpiece has been sawed along the first cutting line or lines. This saves having to carry out these trimming processes on each individual workpiece strip together with sawing along the second cutting lines, as is usual in the prior art. This leads to a significant time optimization when dividing the workpiece according to the cutting plan.

The cutting plan can have a single first cutting line or a plurality of first cutting lines parallel to one another. The formulation first cutting line(s) includes both possibilities; in this case one could also speak of the at least one first cutting line. When speaking of all first cutting lines, this is precisely this single first cutting line if the cutting plan has only one single first cutting line. If the cutting plan has several first cutting lines, these are all first cutting lines. The first cutting line(s) is or are preferably straight or, in other words, linear over their respective total extent. The same applies to the second cutting lines.

The workpiece on which the method according to the invention is carried out can be a previously unprocessed raw panel or a stack of such previously unprocessed raw panels, such as are commercially available. However, the workpiece can also be a panel or a stack of panels on which processing steps have already been carried out in advance using the panel dividing system or another tool or another machine. For example, the work piece can also be panels or stacks of panels from which parts of the raw panel or stack of raw panels have already been cut off in advance, e.g. Examples of this are described in detail below.

In the method according to the invention, one could saw up of the workpiece along the first cutting line or the mutually parallel first cutting lines as the first method section and sawing the resulting workpiece strips along the second cutting line or the second cutting lines as a subsequent second method section. In this terminology, the trimming of the workpiece according to the invention would then be carried out along the at least one hem line running parallel to the second cutting line or lines by means of the trimming tool before the first method section.

As is known per se, it is preferably provided that the panel dividing system with which the method according to the invention is carried out has a workpiece support table on which the workpiece, the workpiece strips and also the workpiece parts lie and are transported while the various steps of the method are carried out . Advantageously, known feed devices of the panel dividing system are used to transport the workpiece as well as the workpiece strips and the workpiece parts. As is known per se, these feed devices can have grippers with which they can grip the workpieces, the workpiece strips or the workpiece parts in order to transport or move them on the workpiece support table. If necessary, rotating devices known per se can also be used in the method according to the invention, with which the workpiece or the workpiece strips or the workpiece parts can be rotated in order to align them accordingly for a subsequent sawing process or other processing process. This is also known per se. Subsequent to the sawing of the workpiece strips into the workpiece parts along the second cutting line or the second cutting lines, the so The workpiece parts produced are either already in the required end format or can be further divided. As is known per se, third cuts, fourth cuts, etc. can also be carried out on the workpiece parts, as will also be explained in more detail below by way of example.

Preferred embodiments of the invention provide that a seam to be separated from the workpiece during trimming is completely comminuted into dust and/or chips by the trimming tool during trimming. With these variants, no waste strips are produced during trimming that then have to be disposed of. It is rather the case that the entire hem is comminuted to such an extent during trimming that it is present as dust and/or shavings and can be sucked off if necessary.

In other variants of the method, however, it can also be provided that a waste strip is separated from the workpiece during trimming by means of the trimming tool and this waste strip is fed to a waste disposal device of the panel dividing system. But even then, the waste strip is a residue or waste that is disposed of. Corresponding waste disposal devices can have corresponding shredders or other shredding devices known per se, with which the strip of waste is then further shredded. In any case, material separated from the workpiece during trimming is always waste, which is disposed of. Waste strips separated from the workpiece during trimming are therefore never sawed into any format that can be reused.

The trimming tool can be a milling cutter or the like. However, preferred embodiments provide that a trimming saw is used as the trimming tool for the panel sizing system. It can be a circular saw, for example. In the variants in which the hem cut off from the workpiece during trimming is completely comminuted into dust and/or chips, the cutting width of the trimming saw is advantageously greater than the maximum width of the hem to be cut off. In the variants in which waste strips are produced during trimming and then fed to the waste disposal device, the trimming saw has a smaller cutting width, at least in some areas, than the hem to be separated from the workpiece.

Preferred variants provide that the workpiece is trimmed by the trimming tool along the hem line on the way to the sawing line. Provision is particularly preferably made for the workpiece to be transported in a direction orthogonal to the sawing line on the way to the sawing line. In this context, it is also advantageous if the trimming tool is arranged at a distance from the sawing line along which the separating saw can be moved, with which the workpiece is sawed along the first cutting line(s).

The trimming tool can be stationary. In such cases, the workpiece is pushed along the trimming tool by a feed device on the way to the saw line, for example, and trimmed along the hem line. In other configurations, however, the workpiece can also be held stationary during the trimming process. In this case, the trimming tool is then moved along the workpiece. Both variants are explained in more detail below in the description of the figures.

The inventive method can be based on a wide variety Panel dividing systems are carried out. It is possible, for example, to carry out the method according to the invention on a panel dividing system which has only a single cutting saw that can be moved along a single sawing line. In this case, the method according to the invention advantageously provides that the sawing of the workpiece along the first cutting line(s) is carried out with the same separating saw that can be moved along the sawing line as the workpiece strips are sawed along the second cutting line(s), and the workpiece strips before the sawing along the second cutting line(s) by means of a return device of the panel dividing system from an area behind the sawing line to an area in front of the sawing line. The return of workpiece strips or workpiece parts from an area behind a sawing line to an area in front of a sawing line by means of a return device is known per se in the prior art, for example from the document mentioned at the outset. Such return devices may include powered roller tables, conveyor belts, feed devices with grippers, or the like. Rotating devices for rotating the workpiece strips and/or workpiece parts can also be integrated into such return devices. Such rotary devices are also known per se. The return devices can be designed in such a way that they return the workpiece strips laterally around the sawing line from the area behind the sawing line to the area in front of the sawing line. However, the return devices can also include lifting devices such as robot arms, gantry cranes or the like or be formed from them. In such configurations, it is then possible to move the workpiece strips across the sawing line from the area behind the sawing line to the area in front of the sawing line to lift. Such return devices are also known per se in a wide variety of configurations.

Of course, methods according to the invention can also be carried out on panel dividing systems in which two or more cutting saws can be moved along a sawing line at a distance from one another. If the method according to the invention is implemented on such panel dividing systems, it can be provided, for example, that the workpiece is sawed along the first cutting line(s) with the dividing saw of the panel dividing system that can be moved along the saw line, and the workpiece strips are cut along the second cutting line(s) with another one along it another sawing line, moveable, cut-off saw of the panel dividing plant.

Irrespective of how many dividing saws and sawing lines the respective panel dividing system on which the method according to the invention is carried out has, it is advantageously provided that the respective dividing saw can be moved along the respective sawing line with a saw carriage. The cutting saw can have a rotating circular saw blade. This can be preceded by a scoring saw blade. In any case, the cut-off saw or the saw blade can be lowered in the saw carriage and raised above the respective support plane of the workpiece support table in the area of the saw line. The sawing lines are preferably linear or straight in each case. Above the respective sawing line there is advantageously at least one pressure bar or at least another pressing device with which the workpiece, the workpiece strips or the workpiece parts can be pressed onto the workpiece support table in the area of the sawing line during the sawing process. This is also known per se and does not need to be explained further. The As is known per se, cutting saws and/or pressure beams can be assigned appropriate suction devices for sucking off chips and/or dust. This is also known per se.

Particularly preferred variants of the method according to the invention provide that the workpiece strips for sawing are transported along the second cutting line(s) with their already trimmed end in front to the sawing line or to the further sawing line. This has the advantage that at least one workpiece part is produced along a second cutting line during each sawing process. In terms of speed, this is a significant difference compared to the prior art, since there a trimming process must generally be carried out at least once on each workpiece strip before workpiece parts that can be used further can be produced from the workpiece strip by corresponding sawing processes along the second cutting lines.

Since it is possible with the method according to the invention that the end of the workpiece strip pointing to the sawing line is already trimmed and therefore no longer needs to be trimmed, it is preferably provided that the workpiece strips are positioned very precisely along the first second cutting line or lines before the first sawing process is carried out can become. For this purpose, preferred embodiments of the method provide that the positions of the ends of the workpiece strips pointing to the sawing line or to the further sawing line are determined by means of a position determination device of the panel dividing system before the workpiece strips are sawn into the workpiece parts along the second cutting line(s). With the help of the position determination device, the panel sizing system knows then very precisely where the end of the workpiece strip pointing to the sawing line or to the further sawing line is located, so that the workpiece strip can then be aligned over the sawing line or the further sawing line by means of a correspondingly precisely calculated feed so that the second cut provided in the cutting plan is exact is carried out at the point where it is also intended according to the cutting plan. The position determination device is advantageously integrated into the workpiece support table in the area in front of the respective sawing line or the further sawing line. It can be designed differently. Provision can be made, for example, for at least one mechanical measuring sensor of the panel dividing system or at least one optical measuring system of the panel dividing system to be used as the position determination device. A mechanical probe can be, for example, at least one body, such as a button or a finger, which is deflected when the end of the workpiece strip pointing towards the saw line hits it. Such mechanical probes can be integrated into the workpiece support table, for example, or they can also be arranged above it. For example, light barriers or cameras with appropriate image recognition or the like come into consideration as optical measuring systems. Such technologies are also known per se. However, the position determination device can also be a stop of the panel dividing system. In this case, the end of the workpiece strip pointing to the sawing line or to the further sawing line is moved against this stop in order to precisely determine its position. The stop can then be removed accordingly, for example by lowering or raising, so that the workpiece strip can then be transported further in the direction of the sawing line or in the direction of another sawing line. Provision can be made for the workpiece strips to be stopped in order to determine the position of the ends of the workpiece strips pointing to the sawing line or to the further sawing line. In particular when using mechanical probes or optical measuring systems as a position determination device, however, it can also be provided that the workpiece strips are moved further when determining the position of the ends of the workpiece strips pointing to the sawing line or to the further sawing line. Measurement errors and signal propagation times that may have to be taken into account, as well as signal processing times, can be taken into account when determining the position and, if necessary, included as correction factors.

• Fig. 1 und 2 ein Beispiel für einen Schnittplan und die entsprechende Aufteilung eines Werkstücks gemäß eines Verfahrens wie es aus dem Stand der Technik bekannt ist;
• Fig. 3 und 4 Darstellungen wie der Schnittplan gemäß Fig. 1 und 2 zur Umsetzung eines erfindungsgemäßen Verfahrens modifiziert wird;
• Fig. 5 bis 8 ein anderes Beispiel zur Umsetzung eines Schnittplans mit einem erfindungsgemäßen Verfahren;
• Fig. 9 bis 11 schematisierte Darstellungen zu einer Plattenaufteilanlage mit nur einer Sägelinie auf der das erfindungsgemäße Verfahren umgesetzt werden kann;
• Fig. 12 bis 14 schematische Darstellungen zu einer zweiten Variante einer Plattenaufteilanlage, mit der das erfindungsgemäße Verfahren umgesetzt werden kann;
• Fig. 15 und 16 Darstellungen zu einer abgewandelten Variante basierend auf dem Ausführungsbeispiel gemäß der Fig. 12 bis 14;
• Fig. 17 eine schematische Darstellung zu einer Plattenaufteilanlage mit zwei hintereinander und distanziert voneinander angeordneten Sägelinien, auf der ebenfalls erfindungsgemäße Verfahren durchgeführt werden können und
• Fig. 18 und 19 zwei verschiedene Beispiele, wie Werkstückstreifen zur Durchführung der Sägevorgänge entlang der Zweitschnittlinien einer Sägelinie zugeführt werden können.

Further features and details of preferred embodiment variants of the invention are explained below by way of example on the basis of different embodiment variants. Show it:

• Figures 1 and 2 an example of a cutting plan and the corresponding division of a workpiece according to a method as it is known from the prior art;
• Figures 3 and 4 Representations as per the cutting plan Figures 1 and 2 is modified to implement a method according to the invention;
• Figures 5 to 8 another example of the implementation of a cutting plan with a method according to the invention;
• Figures 9 to 11 Schematic representations of a panel dividing system with only one saw line on which the method according to the invention can be implemented;
• Figures 12 to 14 schematic representations of a second Variant of a panel dividing system with which the method according to the invention can be implemented;
• 15 and 16 Representations of a modified variant based on the embodiment according to FIG Figures 12 to 14 ;
• 17 a schematic representation of a panel dividing system with two saw lines arranged one behind the other and at a distance from one another, on which the method according to the invention can also be carried out and
• 18 and 19 two different examples of how workpiece strips can be fed along the second cutting lines of a sawing line to carry out the sawing processes.

Based on Figures 1 and 2 the procedure as is customary in the prior art will now first be described by way of example. is shown in 1 a top view of a workpiece 1 in the form of a previously unmachined raw panel 31. Of course, the workpiece 1 could just as easily be a corresponding stack of raw panels 31. The cutting plan 2 is shown projected onto the workpiece 1 . It shows the first cut lines 6 and the second cut lines 7, but also the other hem lines 28 and, for example, also third cut lines 29 and a fourth cut line 30. Sawing along the first cut lines 6 creates the workpiece strips 8. These are then cut by sawing along the second cut lines 7 sawed into the workpiece parts 9. Like in 1 cutting plan 2 shown as an example, some of the workpiece parts 9 produced in this way are then optionally further sawed along the third cutting line 29 and also the one fourth cutting line 30, as is the case in the form of so-called third and fourth cuts is known per se. In 1 , as well as in the Figures 2 to 8 , the final formats are shown in white. All shaded areas are waste pieces. In the prior art, all trimming processes are carried out along the other hem lines 28 together with the first cutting lines 6 or the second cutting lines 7 . According to the present example 1 If the workpiece 1 is first fed in direction 20 to a corresponding sawing line 3 to carry out the sawing processes along the first cutting lines 6, then the sawing or trimming processes are carried out one after the other along a front other hem line 28 parallel to the first cutting lines 6, along the first cutting lines 6 and then a rear other hem line 28 parallel to the first cutting lines 6 worked off as known per se. As a result, the situation is then in accordance with the state of the art 2 before, in which the individual workpiece strips 8 are already separated from one another and the other hems 55 are also already separated by the trimming processes along the other hem lines 28 parallel to the first cut lines 6. With this procedure according to the prior art, other hems 56 remain on both opposite ends of each workpiece strip 8, which in the prior art on each workpiece strip 8 have to be separated separately together with the sawing processes along the second cutting lines along the other two end hem lines 28. This means that, in the prior art, another seam 56 has to be separated separately on each workpiece strip 8 on both end sides.

The associated effort is now reduced in the invention in that the workpiece 1 is cut along at least one parallel to the second cutting line or lines 7 running hem line 10 of the cutting plan 2 is trimmed by means of a trimming tool 11 of the panel dividing system 5 before the workpiece 1 is sawed along the first cutting line 6 or the first of the first cutting lines 6 . The procedure according to the invention is exemplified in the Figures 3 and 4 shown. 3 13 again shows the workpiece 1 in the form of a raw panel 31 that has not yet been machined with the cutting plan 2 according to the invention projected onto it. The first cutting lines 6 and second cutting lines 7 of this example according to FIG Figures 3 and 4 are the same as in Figures 1 and 2 . However, the essential difference is that the trimming process is carried out along the hem line 10 before the workpiece 1 is sawed along the first cutting lines 6 . By means of this trimming process along the hem line 10, a hem 12 is severed in one step on one side of all the workpiece strips 8 that are produced later. Only then is the workpiece 1 sawed along the first cutting lines 6 into the workpiece strips 8. 4 shows the state in which the hem 12 has already been severed along the hem line 10 and then the workpiece 1 has been sawn into the workpiece strips 8 along the first cutting lines 6 and the other hem lines 28 parallel thereto, with the other hems 55 already having been severed. The advantage over the prior art is that, in contrast to the prior art, no separate trimming process has to be carried out at the ends 23 or 27 of each workpiece strip 8 . When sawing the respective workpiece strips 8 along the second cutting lines 7 , one trimming process along one of the other hem lines 28 parallel to the second cutting lines 7 is saved in comparison to the prior art.

Based on Figures 5 to 8 an example will now be explained at before carrying out the method according to the invention on the raw panel 31 or on the stack of raw panels 31, other processing operations are first carried out before the result of this is the workpiece 1, which is then further sawed up with the method according to the invention. In the example specifically shown here, a trimming process along the rest of the seam line 28 is initially carried out on the raw panel 31 or the stack of raw panels 31 figure 5 and a head cut along head cut line 32 figure 5 is carried out. As in 6 shown, the rest of the hem 34 and the head part 33 separated. The remainder then forms workpiece 1, which is 7 is shown without the head part 33 and without the rest of the hem 34 . The rest of the seam 34 can be disposed of in a manner known per se. As is known per se in the prior art, the head part 33 can be further subdivided.

The remaining workpiece 1 according to 7 is now sawed further according to the invention. In this case, once again, the hem 12 is first severed along the hem line 10 running parallel to the second cutting lines 7 before the workpiece 1 is then further sawed along the first cutting lines 6 into the workpiece strips 8 . 8 shows the state after the trimming process has been carried out along the hem line 10 and the subsequent sawing processes along the first cut lines 6 and the trimming process along the other hem line 28 running parallel to the first cut lines 6. Here too, the procedure according to the invention ensures that each workpiece strip 8 already has at least one end 23 or 27, which is already finished trimmed and is therefore no longer trimmed along the second cutting lines 7 together with the implementation of the sawing processes got to.

9 now shows a highly schematic plan view, obliquely from above, of a first exemplary embodiment of a panel dividing system 5 with which the method according to the invention can be carried out. This is a panel dividing system 5 with only a single sawing line 3 along which a cutting saw 4 can be moved in order to carry out the sawing processes along the first cutting lines 6 and the second cutting lines 7 and the other hem lines 28 . In 9 only the sawing station 38 is shown in a roughly schematic manner. Their essential components are explained below with the help of 10 explained in more detail. In any case, the sawing station 38 contains the sawing line 3 running orthogonally to the direction 20 and the cutting saw 4 which can be moved along this sawing line 3. The panel dividing system 5 according to FIG 9 has, as is known per se, a workpiece support table 35 which extends both in an area 16 in front of the sawing line 3 or the sawing station 38 and also in an area 17 behind the sawing line 3 or the sawing station 38 . In the area 16 in front of the sawing line 3 there is a known feed device 36, which with its known grippers 37 grips the workpiece 1, but also the workpiece strips 8 and the workpiece parts 9 and rests on the workpiece support table 35 to the sawing line 3 and over push the sawing line 3 away in direction 20, but can also pull it back again in the opposite direction to 20. In area 16, i.e. at a distance from and also in front of the saw line 3, the panel dividing system 5 has the trimming station 42, with which the trimming process can be carried out on the workpiece 1 along the hem line 10 according to the invention, before the workpiece 1 is cut along the first cutting lines 6 by means of the cutting saw 4 is sawed up. The structure of the trimming station 42 of this Embodiment is based on the 10 and 11 explained in detail below. The workpieces 1 can be fed into the working area of the feed device 36 by means that are known per se and are not shown here. In the area 16 in front of the sawing line 3, a rotary device 54, which is known per se and is indicated here only by dashed lines, can also be integrated into the workpiece support table 35. This rotating device 54, which is known per se, can be used to rotate raw panels 31, workpieces 1, workpiece strips 8, as well as workpiece parts 9 or other formats resulting from them, about a vertical axis before they are fed to the sawing line 3 to carry out sawing processes, as far as this is necessary. Instead of integrating the rotating device 54 into the workpiece support table 35, robots, gantry cranes or the like, not shown here, arranged above the workpiece support table 35 could also be arranged with corresponding rotating devices in order to rotate the components mentioned before they are fed to the sawing line 3.

In the area 16 in front of the sawing line 3 , the panel dividing system 5 has a position-determining device 22 in the form of a stop 26 . This stop 26 can, as in 9 shown, are extended over the support plane 21 of the workpiece support table 35, so that workpiece strips 8 can be driven against this stop 26 to determine the position, as explained further below. However, the stop 26 can also be lowered below the support plane 21 of the workpiece support table 35 so that the workpiece strips 8 can then be moved over it.

The panel dividing system 5 according to 9 points immediately behind the sawing station 38 a waste disposal 39 known per se. Such waste disposal systems 39 with waste flaps and a corresponding discharge device and shredding device for waste are known per se, so that a schematic representation is sufficient in this regard as well. Waste disposal 39 can be used to remove and dispose of waste pieces produced during sawing processes with the cutting saw 4, such as the other seams 55 and 56, but also waste produced during the sawing processes along third cutting lines 29 or fourth cutting lines 30, from the material flow immediately after the sawing line 3.

In area 17 of the workpiece support table 35 behind the saw line 3 or behind the sawing station 38, the workpiece strips 8 or workpiece parts 9 or other formats that accumulate there can be fed by the robot 40 either to the discharge area 41 or to the return device 15, depending on whether they are further processed have to be or already represent a desired final format. If necessary, the robot 40 can also rotate these formats about a vertical axis. In the prior art, gripping devices for such robots 40 are known which can grip, lift, transport and set down as well as rotate not only a single plate but also a stack of plates. Instead of the robot 40, rotating devices 54 or other conveying devices that can carry out a sorting function could also be built into the workpiece support table 35 in the area 17. All of this is known per se in the prior art and does not need to be explained further. Of course, the transport, sorting and possibly also the turning function of the robot 40 could also be performed by a corresponding gantry crane behind the sawing station 38 . the In any case, return device 15 is always used when workpiece strips 8, workpiece parts 9 or other formats from area 17 behind sawing line 3 have to be transported back to area 16 before sawing line 3 for further processing. As is known per se, the return device 15 can be a conveying device leading around the sawing line 3 or sawing station 38, possibly with corresponding rotating devices. Instead of these variants of the return device 15 shown schematically here, corresponding robots or gantry cranes could of course also be used to lift the workpiece strips 8, workpiece parts 9 or other formats to be returned over the sawing station 38 or the sawing line 3 from the area 17 to the area 16 .

the 10 and 11 now show further details of the panel dividing system 5 according to FIG 9 in area 16, particularly in the area of trimming station 42, and in the area of sawing station 38. 10 shows a schematic longitudinal section parallel to direction 20. 11 shows a schematic cross-section orthogonal to direction 20. In 10 the known components of the sawing station 38 are shown schematically on the right-hand side. The saw carriage 48 can be seen, in which the cut-off saw 4, designed here as a circular saw blade, is mounted. As is known per se, the cut-off saw 4 can be raised and lowered in the saw carriage 48 so that it protrudes beyond the support plane 21 of the workpiece support table 35 for sawing and, if necessary, can also be lowered below this support plane 21 . A scoring saw blade, which is not shown here but is known per se, can be arranged in front of the cutting saw 4 . The cut-off saw 4 is possibly together with the scoring saw blade with the saw carriage 48 along the sawing line 3, as is known per se. The sawing line 3 is in accordance with the illustration 10 normal at the leaf level. Above the sawing line 3 in the sawing station 38 is a pressure beam 43 which, as is known, is used to press the workpieces 1, workpiece strips 8 or workpiece parts 9 or other formats to be sawn onto the workpiece support table 35 during the sawing process. Dust and shavings produced during the sawing processes can be disposed of by appropriate suction devices, as is known per se in the prior art, without this being shown separately here.

10 It can also be seen that the workpiece support table 35 realized here has a sequence of rollers 45 on which the workpieces 1, workpiece strips 8, workpiece parts 9 and other formats can be shifted with little friction. Instead of this, of course, known air cushions, bristles or the like could also be used to implement a support plane 21 of the workpiece support table 35 that is as low-friction as possible.

In the embodiment according to the Figures 9 to 11 the trimming station 42 is stationary. The trimming tool 11 arranged in this trimming station 42 is a circular saw blade in this exemplary embodiment. Alternatively, of course, a milling head or the like could also be used as the trimming tool 11 . In the exemplary embodiment shown, a scorer saw blade 44 known per se is arranged in front of the trimming tool 11 in order to ensure the cleanest possible edge during the trimming process. In this exemplary embodiment, there is a cover 46 over the trimming tool 11 and the scoring saw blade 44. Over the Suction socket 47 of the covering hood 46 can be used to suck off chips and/or dust produced during the trimming process from the covering hood 46 by means of a suction device, not shown here. In this embodiment, the workpiece to be trimmed 1 by means of the in 10 Drawn rails 49 movable feed device 36 pushed past the stationary running trimming station 42 in order to realize the trimming process. In 11 It is easy to see that in this exemplary embodiment the trimming tool 11 has a cutting width which is greater than the width of the hem 12 to be cut off during the trimming process. This ensures that the seam 12 to be separated from the workpiece 1 is completely comminuted into dust and/or chips by the trimming tool 11 during trimming and can therefore be completely sucked off. In this exemplary embodiment, no waste strips or the like have to be disposed of. The direction of rotation of the saw blade used as the trimming tool 11 can be selected such that the workpiece 1 is pressed onto the workpiece support table 35 by the trimming tool 11 itself during trimming. In addition or as an alternative to this, however, other means can also be used in order to press the workpiece 1 onto the workpiece support table 35 during the trimming process. For example, these can be skids or rollers, preferably arranged on the cover hood 46 .

In the following, based on the in Figures 3 and 4 shown cutting plan 2 exemplified, as with the panel dividing system 5 according to Figures 9 to 11 the method according to the invention can be implemented. For this purpose, the in 3 Workpiece 1 shown, be it a single plate or a stack of plates, by known here but not shown means placed on the support plane 21 of the workpiece support table 35 and specifically in front of the trimming station 42. The workpiece 1 is pushed past the trimming station 42 and thus the scoring saw blade 44 and the trimming tool 11 . In this process, according to the invention, the hem 12 is severed along the hem line 10 running parallel to the second cutting lines 7 before the workpiece 1 is sawed along the first cutting lines 6 . In this embodiment, the hem 12 is, as in 11 illustrated, completely reduced to dust and/or shavings. Subsequently, the sawing processes along the first cutting lines 6 and the other hem lines 28 parallel thereto are then carried out in a manner known per se by means of the cutting saw 4 . The workpiece 1 is always pushed far enough over the saw line 3 by the feed device in a manner known per se that the respective first cut line 6 or other hem line 28 to be sawn is positioned exactly for the sawing process on the saw line 3. The other seams 55 occurring during this process are disposed of in waste disposal 39 . The workpiece strips 8 resulting from the sawing processes along the first cutting lines 6 are rotated as far as necessary from the area 17 behind the sawing line 3 by the robot 40 and transported back to the area 16 in front of the sawing line by the return device 15. The workpiece strips 8 are favorably positioned as in 18 shown, aligned so that they point to the saw line 3 with their already trimmed ends 23 and 27 respectively. This has the advantage that with each of the sawing processes now to be carried out along the Second cutting lines 7 in each case a workpiece part 9 arises. In order to carry out the sawing processes along the second cutting lines 7 , the workpiece strips 8 are again gripped by the feed device 36 by means of their grippers 37 . According to the arrangement 18 This gripping then takes place in the area of the other seams 56. The feed device 36 then pushes the respective workpiece strip 8 back in direction 20 towards the saw line 3. The front, already trimmed end 23 or 27 strikes the position determination device 22 designed as a stop 26 , so that at this moment the position of the front end 23 or 27 of the workpiece strip 8 is determined very precisely. With this procedure, the workpiece strip 8 is thus stopped in order to determine the position of the ends 23 pointing to the sawing line 3 . After the stop 26 has then been lowered below the support level 21 of the workpiece support table 35, the workpiece strip can be positioned very precisely by the feed device 36 by further feed in direction 20 and in such a way that the second cutting line 7 to be sawed next is exactly above the sawing line 3 comes to rest and so the sawing process along the second cutting lines 7 can be carried out very precisely.

The workpiece parts 9 produced by sawing the workpiece strips 8 along the second cutting lines 7 can then be fed to the discharge area 41 in the area 17 behind the sawing line 3 by the robot 40 when they have reached their final format. If third cuts have to be sawn along the third cutting lines 29 on individual workpiece parts 9, these workpiece parts 9 are placed back onto the return device 15 by the robot 40, if necessary after appropriate rotation, and are then returned to the area 16, which is then followed in itself the third cuts along the third cutting lines 29 can be carried out in a known manner. If fourth cuts are then still necessary along the fourth cut lines 30, the procedure is again the same as for the third cuts.

To make the cutting plan according to the Figures 5 to 8 with this panel dividing plant according to Figures 9 to 11 according to the invention, the raw board 31 or the stack of raw boards 31 is first inserted in the area 16 and gripped by the feed device 36 with its grippers 17 . When transporting the raw panel 31 or the stack of raw panels 31 in the direction 20 towards the sawing line 3, the trimming process along the other trimming line 28 is then initially stopped at the trimming station 42 figure 5 carried out. The head cut along the head cutting line 32 is then made on the sawing line 3 by means of the cutting saw 4 figure 5 carried out. The rest of the hem 34 is in the panel dividing system according to Figures 9 to 11 in turn completely crushed into chips and/or dust, so that it can be sucked off in the trimming station 42 . The head part 33 is sawed further in a manner known per se, without this having to be explained further. The remaining workpiece 1 according to 7 is now pulled back a little by the feed device 36 into the area of the rotating device 54, rotated there by 90°, gripped again by the feed device 36 with its grippers 37 and transported in direction 20 back to the saw line 3. On the way there, according to the invention, the trimming process along the hem line 10 on the workpiece 1 is first carried out using the trimming tool 11 of the trimming station 42, before the sawing processes are then carried out on the sawing line 3 along the first cutting lines 6 and the parallel other hem lines 28 is carried out. The resulting workpiece strips 8 are then fed back and, if necessary, rotated analogously to the procedure already described, so that the sawing processes can then be carried out on the sawing line 3 along the second cutting lines 7 in a corresponding manner. If the resulting workpiece parts 9 are final formats, they can then be transferred to the removal area 41 . The workpiece part 9, on which a sawing process along the third cutting line 29 still has to be carried out, is fed back accordingly in order to then be able to carry out the third cut.

the Figures 12 to 14 now show an embodiment compared to the first embodiment of FIG Figures 9 to 11 somewhat modified panel dividing system 5 with which the method according to the invention can also be carried out. The differences lie on the one hand in the design of the trimming station 42 and on the other hand in the design of the position determination device 22. These two differences will be discussed below. Otherwise, the above description of the embodiment according to the Figures 9 to 11 referred.

In the case of the trimming station 42, there are two differences from the exemplary embodiment described above. On the one hand, the trimming tool 11 is arranged here together with its scoring saw blade 44 in a trimming carriage 50, with which it can be moved parallel to the direction 20 for carrying out the trimming process. In this embodiment, the workpiece 1 to be trimmed is thus kept at rest during the trimming process by the feed device 36, while the trimming tool 11, which is also shown here as a Circular saw blade is formed, is moved along with the trimming carriage 50 on the workpiece 1, for example for trimming along the hem line 10. The trimming station 42 has a trimming pressure bar 51 for this trimming process, with which the workpiece 1 or another part to be trimmed can be pressed onto the workpiece support table 35 during this trimming process. The suction of the chips and/or the dust produced during the trimming process can take place via suction devices, which are not explicitly shown here but are known per se.

The second difference from the embodiment according to the Figures 9 to 11 is in 14 shown. It consists in the fact that in this exemplary embodiment the cutting width of the trimming tool 11 is designed so narrow that a waste strip 13 is separated from the workpiece 1 during trimming and then fed to the waste disposal device 14 of the panel dividing system 5, which is only shown schematically here. the inside 14 For this purpose, separated waste strips 13 slide over the chute 52 into the waste disposal device 14 and are disposed of there, for example as is known per se from the waste disposal 39, and may have been comminuted beforehand.

An alternative to here according to the Figures 12 to 14 realized generation of a waste strip 13 is still in the 15 and 16 shown. Here, too, the trimming tool 11 is moved parallel to the direction 20 together with the scoring saw blade 44 in the trimming carriage 50 during the trimming process. In addition, also in the 15 and 16 the trimming pressure bar 51 for pressing the workpiece 1 onto the workpiece support table 35 during the trimming process. The difference to the variant according to the Figures 12 to 14 but consists in the fact that here, as in 16 As can be seen, the trimming tool 11 has such a large cutting width that the resulting seam 12 is completely comminuted into dust and/or chips during the trimming process, which can then be sucked off via the suction nozzle 47 .

coming back on 12 there is the second difference between the exemplary embodiments according to FIG Figures 12 to 16 for the execution of the panel dividing system 5 according to the Figures 9 to 11 in the type of configuration of the position determination device 22. Instead of in the Figures 9 to 11 realized stop 26 is in the panel dividing systems 5 according to Figures 12 to 16 as a position determination device 22 either an optical measuring system 25 such as a light barrier or a camera system or an arrangement of in 12 illustrated probes 24 realized. The mechanical probes can be measuring fingers or buttons that can be tilted or otherwise passed over, which then emit a signal from the position determination device 22 that is used to determine the position when the already trimmed end 23 or 27 of the workpiece strip 8 is moved over the mechanical probe 24 . With this position determination device 22 it is therefore possible to determine the position of the ends 23 of the workpiece strips 28 pointing to the sawing line 3 while the workpiece strip 8 is moved further away by the feed device 36 via the position determination device 22 . The same is of course possible if the position determination device 22 is an optical measuring system 25 . Of course, stopping the workpiece strips 8 when determining the position with these position determining devices 22 would also be conceivable. In this way, too, the position of the front end 23 or 27 of the respective workpiece strip 8 can be determined very precisely, in order then to be able to position the workpiece strips 8 with their second cutting lines 7 exactly over the sawing lines 3. Delays in the measurement expression that may have to be taken into account can be taken into account by appropriate correction factors, insofar as this is necessary.

Otherwise, with the panel dividing systems 5 according to the Figures 12 to 16 to implement the method according to the invention, the procedure is the same as that for the exemplary embodiment according to FIG Figures 9 to 11 was portrayed.

17 now shows a variant of a panel dividing system 5, in which the workpiece 1 is sawed along the first cutting line 6 with the cutting saw 4, which can be moved along the sawing line 3, in the sawing station 38, and the workpiece strips 8 are cut along the second cutting line 7 with a further, along a further sawing line 18 movable cut-off saw 19 of the panel dividing system 5 are sawed. The further sawing line 18 and the further separating saw 19 are located in the further sawing station 53. They are designed analogously to the sawing line 3 and the separating saw 4 of the sawing station 38, as is shown in FIGS 10 , 13 and 15 is shown schematically and was explained above. When implementing the method according to the invention using the in 17 In the panel dividing system shown schematically, the trimming process is carried out along the hem line 10 and the sawing processes are carried out along the first cut lines 6 and the other hem line 28 parallel thereto, as in the exemplary embodiments already described. The trimming station 42 can be carried out as in all the embodiments already discussed. The workpiece strips 8 produced in this way are then, in the variant according to FIG 17 but no longer fed back from the area 17 behind the sawing line 3 or the sawing station 38 back into the area 16 in front of the sawing line 3 or the sawing station 38 . Rather, it is provided here that the robot 40 feeds the workpiece strips 8, if necessary with appropriate rotation, to the feed devices 36 upstream of the further sawing station 53, so that they grip the workpiece strips 9 with their grippers 37 and carry out the sawing processes along the second cutting lines 7 and the lines parallel thereto other hemline 28 of the other sawing line 18 can perform. The position determination devices 22 for determining the already trimmed front ends 23 or 27 of the workpiece strips 8 are arranged correspondingly in front of the further sawing station 53 . In the exemplary embodiment shown, two feed devices 36 that operate in parallel and independently of one another are provided in front of the further sawing station 53, so that two workpiece strips 8 can be fed parallel and simultaneously next to one another, if necessary with different feeds of the further sawing station 53 and thus also of the further sawing line 18 for carrying out the sawing processes along the Second cut lines 7 and/or other hem lines 28 parallel thereto can be supplied. Of course the in 17 The panel dividing system 5 shown can also be modified in such a way that the further sawing station 53 is preceded by only a single feed device 36 or by more than two feed devices 36 working parallel to one another. The return device 15 leading around the further sawing station 53 can optionally be designed with a rotary device 54 in the manner already described. She will here however, only used for the return of workpiece parts 9 if they have to be sawed further by means of the further sawing station 53 along third cutting lines 29 and possibly fourth cutting lines 30 . When carrying out the method according to the invention with the panel dividing system 5 17 With the exception of the differences mentioned, the procedure can be analogous to that described above for the other exemplary embodiments. In particular, here too, according to the invention, the workpiece 1 can be trimmed along the at least one hem line 10 of the cutting plan 2 running parallel to the second cutting line(s) 7 using the trimming tool 11 before the workpiece 1 is sawed along the first cutting lines 6.

The position determining device 22 according to FIG 17 can be embodied in all the variants described above with regard to the other exemplary embodiments. Their function corresponds to the function of the position determination devices 22 described for the other exemplary embodiments.

The preferred way of feeding the workpiece strips 8 with their already trimmed end 23 or 27 to the sawing line 3 has already been described above. The same can of course also be done with the exemplary embodiment according to FIG 17 and the additional sawing line 18 and the additional cutting saw 19 that can be moved there. 19 However, FIG. 1 shows that it is also fundamentally possible to feed the workpiece strips 8 to the sawing lines 3 or 18 and the cutting saws 4 or 19 the other way round. Legend for the reference numbers 1 workpiece 29 third cutting line 2 cutting plan 30 fourth cutting line 3 cutting saw 31 raw board 5 panel cutting machine 32 head cutting line 6 first cut line 33 headboard 7 second cutting line 34 other hem 8th workpiece strips 35 workpiece support table 9 workpiece parts 36 feed device 10 hemline 37 gripper 11 trimming tool 38 sawing station 12 hem 39 waste disposal 13 waste strips 40 robot 14 waste disposal device 41 discharge area 42 trimming station 15 return device 43 pressure bar 16 area 44 scoring saw blade 17 area 45 roll 18 another saw line 46 cover hood 19 another cutting saw 47 exhaust nozzle 20 Direction 48 saw carriage 21 support level 49 rail 22 positioning device 50 trimming carriage 51 trimming pressure bar 23 End 52 slide 24 mechanical probe 53 further sawing station 25 optical measuring system 54 rotating device 26 attack 55 other hem 27 End 56 other hem 28 other hem lines

Claims (15)

Method for sawing up at least one workpiece (1), consisting of a panel or a stack of panels, the workpiece (1) being cut according to a cutting plan (2) by means of at least one cutting saw (4) of a panel dividing system (5 ) is sawn up, the cutting plan (2) having a first cutting line (6) or several first cutting lines (6) parallel to one another and a second cutting line (7) or several second cutting lines (7) parallel to one another, the second cutting line(s) (7) in the cutting plan (2) run orthogonally to the first cutting line(s) (6), and the workpiece (1) is first sawed into workpiece strips (8) along all first cutting lines (6) of the cutting plan (2) and then the workpiece strips ( 8) along all second cutting lines (7) of the cutting plan (2) are sawn into workpiece parts (9), characterized in that the workpiece (1) along at least one parallel to the or the second cutting line e(n) (7) running hem line (10) of the cutting plan (2) is trimmed by means of a trimming tool (11) of the panel dividing system (5) before the workpiece (1) along the first cutting line (6) or the first of the first cutting lines (6 ) is sawed up. Method according to Claim 1, characterized in that a seam to be separated from the workpiece (1) during trimming (12) is completely comminuted into dust and/or chips by the trimming tool (11) during trimming. Method according to Claim 1, characterized in that a waste strip (13) is separated from the workpiece (1) during trimming using the trimming tool (11) and this waste strip (13) is fed to a waste disposal device (14) of the panel dividing system (5). Method according to one of Claims 1 to 3, characterized in that the workpiece (1) is sawn up along the first cutting line(s) (6) with the same separating saw (4) which can be moved along the sawing line (3) as the sawing up of the Workpiece strips (8) along the second cutting line(s) (7), and the workpiece strips (8) before sawing along the second cutting line(s) (7) by means of a return device (15) of the panel dividing system (5) from an area (17) behind of the sawing line (3) in an area (16) in front of the sawing line (3). Method according to one of Claims 1 to 3, characterized in that the workpiece (1) is sawed along the first cutting line(s) (6) with the dividing saw (4) of the panel dividing system (5) which can be moved along the sawing line (3) and the workpiece strips (8) are sawed along the second cutting line(s) (7) with a further separating saw (19) of the panel dividing system (5) which can be moved along a further sawing line (18). The method according to any one of claims 1 to 5, characterized in that the workpiece (1) on the way is trimmed to the saw line (3) by the trimming tool (11) along the hem line (10). Method according to Claim 6, characterized in that the workpiece (1) is transported in a direction (20) orthogonal to the sawing line (3) on the way to the sawing line (3). Method according to one of Claims 1 to 7, characterized in that a trimming saw is used as the trimming tool (11) of the panel dividing system (5). Method according to one of Claims 1 to 8, characterized in that the trimming tool (11) is arranged at a distance from the sawing line (3) along which the cutting saw (4) can be moved, with which the workpiece (1) is cut along the first cutting line(s). ) (6) is sawn up. Method according to one of Claims 1 to 9, characterized in that the positions of the ends (23) of the workpiece strips (8) pointing to the saw line (3) or to the further saw line (18) are determined by means of a position determination device (22) of the panel dividing system (5). before the workpiece strips (8) are sawn into the workpiece parts (9) along the second cutting line(s) (7). Method according to Claim 10, characterized in that at least one mechanical measuring sensor (24) of the panel dividing system (5) or at least one optical measuring system (25) of the panel dividing system (5) is used as the position determination device (22). Method according to Claim 10, characterized in that a stop of the panel dividing system (5) is used as the position determination device (22). Method according to one of Claims 10 to 12, characterized in that the workpiece strips (8) are stopped to determine the position of the ends (23) of the workpiece strips (8) pointing to the sawing line (3) or to the further sawing line (18). Method according to one of Claims 10 or 11, characterized in that the workpiece strips (8) are moved further when determining the position of the ends (23) of the workpiece strips (8) pointing to the sawing line (3) or to the further sawing line (18). Method according to one of Claims 1 to 14, characterized in that the workpiece strips (8) for sawing along the second cutting line(s) (7) with their already trimmed end (27) in front of the sawing line (3) or the further sawing line (18) be transported to.

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