AT518757A1 - Method for processing flat, in particular sheet-shaped, workpieces, device and laser cell for carrying out the method - Google Patents

Abstract

The invention relates to a laser cell (2), to a device and to a method for processing flat, in particular sheet-shaped, workpieces (3), in which the workpiece (3) is conveyed via a transport and / or fastening device (9) in a processing space (13 ) of a laser cell (2) is inserted or supplied and positioned, whereupon a machining of the workpiece (3) by a laser (16). Subsequently, the workpiece (3) is conveyed or removed from the processing space (13). In the processing space (13), the workpiece (3) is fixed so that this only on the side edges (25,26), in particular in a range up to 1 cm from the side edge (25,26), fixed and preferably tensioned, wherein a bottom (20) of the workpiece (3) is completely floating freely or positioned without a blade.

Description

Method for processing flat, in particular sheet-shaped, workpieces, device and laser cell for carrying out the method

The invention relates to a method for machining workpieces, to a device for carrying out the method, and to a laser cell as described in the preambles of claims 1, 15 and 23.

From the general state of the art installations are known in which a laser system is coupled or equipped with a turning table or sliding table or belt conveyor. In this case, the turning table or sliding table is guided through the processing space, wherein the workpiece is placed and positioned on one side of the laser system at the turning table or sliding table, whereupon the turning table or sliding table is adjusted such that the workpiece aligned thereon is positioned in the processing space. Subsequently, the machining of the workpiece via the laser in the processing room can be carried out, wherein after completion of the processing of the turning table or sliding table is in turn adjusted, so that the now machined workpiece is moved out of the processing room. In this case, the machined workpiece is preferably pushed on the opposite side for depositing the workpiece.

The disadvantage of such a system that at a turning table several workpieces are placed simultaneously next to each other, which are then processed sequentially. Furthermore, it is thus necessary that at least one employee must constantly work on the system to hang up and remove workpieces.

Furthermore, systems are known in which an automatic processing of workpieces is possible, in which a workpiece is removed from a feeder individually via a transport and / or fastening device and conveyed into the processing space. In the processing room, the workpiece is placed on a base plate or on support elements and fixed during processing under the laser. Subsequently, the

Workpiece in turn transported away via the transport and / or fastening device and stored in a stacker, so that a new workpiece can be introduced. The disadvantage here is that in such systems, the waste from the workpiece is not separated, but still remains fixed by a bridge on the user's workpiece, so that then the waste must be removed manually by an employee or an additional device. This results in very high costs and at the same time a very long production time until a high number of workpieces are completed.

The object of the invention is to provide a method for processing flat, in particular sheet-shaped, workpieces, a device and a laser cell for carrying out the method, in which the handling is significantly improved and the processing time for a workpiece are significantly shortened. Another object is to remedy the disadvantages of the prior art as possible and to ensure a long trouble-free operation.

The object of the invention is achieved by a method such that in the processing space, the workpiece is fixed so that it is only at the side edges, in particular in a range up to 1 cm from the side edge, attached and preferably tensioned, with a bottom of the workpiece is completely free floating or positioned sheet-free.

It is advantageous here that no reflections of the laser beam, which are caused, for example, when the laser beam strikes a base plate or supporting elements, can occur during cutting of the workpiece, so that unwanted destruction or damage by the reflections is reliably avoided. In particular, the quality of the cutting edge on the workpiece is substantially impaired in reflections. Furthermore, troublesome traces of smoke on the back of the workpiece at the support points are avoided. Furthermore, it is advantageous that thereby the cut-out waste can fall vertically downwards and thus there may be no disturbances, especially for entrainment, during removal from the processing room, as often in the prior art by the support surface or support points, in particular support elements or floor slabs, that is the case. The waste often sticks at an angle or hooks up, as it can not fall undisturbed downwards, so that a disturbance is caused during removal or even the workpiece is damaged. According to the invention, a method or device is provided in which the utility and waste of the workpiece in

Processing space is safely separated. Likewise, the waste parts can be easily sorted thereby

The measures are advantageous in which preferably an automatic machining of the workpiece takes place, in which one or more workpieces are deposited on an offshoot, whereupon a single workpiece is taken from an alignment station and aligned and the workpiece from the alignment station via a drive, in particular a vacuum drive, is transferred to the transport and / or fastening device, whereupon the workpiece is transported in the processing room for editing and is then transferred from the processing room to a stacker. This ensures that a very large number of workpieces can be processed fully automatically in succession, with this only an untrained personnel for loading and unloading of the workpieces is needed. However, this must ensure a very high level of process reliability in order to enable batch processing of, for example, 1,000 sheets of paper without disruption.

Of advantage are the measures in which during the machining of the workpiece already another workpiece is removed from the investor and is aligned over the alignment station. This ensures that the cycle time for the machining of the workpieces is substantially increased, since at the same time a new workpiece can be introduced during the removal of the finished workpiece.

But there are also the measures of advantage in which a manual processing of the workpiece takes place, in which the workpiece is placed over a safety door in the processing room on a bottom plate or support elements, whereupon in the manual activation of the machining of the workpiece or automatically when closing the Safety door, the workpiece via the transport and / or fastening device, the workpiece is fixed and optionally positioned, whereupon the bottom plate or the support elements are lowered or the workpiece is raised via the transport and / or processing device and the processing of the workpiece is carried out, whereupon the base plate or the support elements are moved back to the original position and the attachment of the workpiece via the transport and / or processing device is released. It is thereby achieved that by using a bottom plate or supporting elements, a manual insertion of the sheet-shaped workpiece is possible and still in the process due to the lowering or adjustment of the bottom plate or the support elements, a sheet-free or floating attachment of the workpieces to avoid reflections and safe separation of the benefits and waste of the workpieces is possible. In such a procedure, however, it is necessary that the transport and / or processing device can be opened and closed in any position to secure the workpiece securely. It is also possible that in addition to the automatic transport a manually operable holding device can be arranged or used in the processing room, so that when inserting the workpiece, the workpiece is fixed on this manual holding device, so held securely when lowering the bottom plate or the supporting elements workpiece becomes.

Advantageously, the measures in which a waste is preferably separated from the use of the workpiece in the processing room. This ensures that post-processing to extract the waste is avoided. Thus, the manufacturing cost of the workpiece is significantly reduced while shortening the completion time.

The measures are advantageous in which in the transport and / or fastening device the workpiece is grasped on two sides via gripping elements of a gripping chain and the workpiece is clamped via the gripping chains, whereupon the workpiece is transported and positioned in the processing area. This ensures that at the same time a transport over the gripping chain and an attachment via the gripping elements on the gripping chain for the workpiece is possible, with a mechanical coupling of the gripping elements and the gripping chain is present and thus a very high process reliability is achieved. The very high process reliability is necessary insofar as in such systems often several hundreds of workpieces are placed on a stack on the feeder, which must be processed automatically succession without interference.

Of advantage are the measures in which at least one transport and / or fastening device, in particular one of the gripping chains, is adjusted transversely to the conveying direction. This ensures that an adaptation to a variety of formats of the workpieces can be made manually and / or automatically. Thus, a rapid conversion of the system to be processed on a variety of

Workpieces, for example a paper workpiece with A3 or A4 or A5 format, are easily possible.

But also advantageous are the measures in which the two gripping chains are aligned parallel to each other or the gripping chains are arranged diverging from the insertion of the workpiece to build a voltage on the workpiece.

This ensures that in a parallel orientation, a constant voltage acts on the workpiece on the conveyor line, whereas when the gripping chain apart during the conveyor line a voltage increase is built up on the sheet-shaped workpiece, so that sagging of the workpiece is reliably prevented.

Of advantage are the measures in which the gripping elements for fixing and securing the sheet-shaped workpiece in a defined region of the conveying path at the same time or offset or open. This ensures that the workpiece is securely inserted in the region of the gripping elements and thus the gripping elements capture the workpiece. By using a mechanical system, which is practically coupled with the gripping chain, it is ensured that when changing the conveying speed and the closing of the gripping elements is adjusted accordingly, without the need for any control commands are required.

But there are also the measures of advantage in which the transport and / or fastening device has a higher conveying speed than the conveying speed of the workpiece is at the alignment station. This ensures that the workpiece is pulled taut by the aligner and thus wrinkle-free transported in the processing space inside.

But also advantageous are the measures in which the transport and / or fastening device and / or the laser for machining the workpiece are adjusted relative to each other. This ensures that the workpiece in the processing room is moved back or forth and / or the laser beam is adjusted. Especially with very large workpieces a relative adjustment to each other is of great advantage, since the laser, in particular the 3-axis galvosystem, can be designed for a smaller machining area with high accuracy and quality, since for large workpieces either the workpiece or the laser with the 3rd -

Axis Galvosystem or both are adjusted to each other to allow complete processing.

Of advantage are the measures in which the transport and / or fastening device is formed by a double gripping chain, in which always two chain links run parallel and is connected via a common continuous axle element, arranged on one side with gripping elements. This ensures that an optimal guidance of the gripping chain without sagging of the gripping chain can be created.

But there are also the measures of advantage in which a bottom plate or support members for the workpiece are lowered in the processing room before machining the workpiece to create a so-called floating state of the workpiece during processing. This ensures that the workpiece is supported by the bottom plate or the supporting elements during transport of the workpiece into the processing space, but in the processing of any interfering elements are removed below the workpiece. That is, for example, that the bottom plate or the supporting elements is preferably lowered several centimeters, in particular 10 cm, so that the sheet-shaped workpiece loosely in the processing room and is held only on the side surfaces on the transport and / or fastening device.

Of advantage are the measures in which when machining a very thin, easily destructible paper as a workpiece, lowering of the bottom plate or the support elements during machining of the workpiece can be deactivated. -> Advantage: The tension of the paper can be reduced so that even very thin workpieces can be machined. This ensures that even very thin workpieces that can be very easily tearing processed with such a device or method, in this case the workpiece is less or not tensioned, but is held only by the transport and / or processing device and a Sliding of the workpiece through the bottom plate or support elements is prevented, so that an optimal processing can be done with high quality. It can be said that this results in stress-free machining of the workpiece, whereas with the base plate or support elements lowered, the machining of the workpiece takes place under tension, so that the workpiece can not sag, but forms a very straight and flat surface. If the workpiece were to sag, because of the adjusted focus point, it would not be the same everywhere, especially in the hanging areas, and errors would occur during machining.

Furthermore, the object of the invention is achieved by a device for carrying out the method, in which the workpiece is fixed in the processing space such that it is only at the side edges, in particular in a range up to 1 cm, fixed and preferably stretched, so that a Bottom of the workpiece is completely levitating or is positioned without blades.

The advantage here is that in such a device, a separation from the benefits of the workpiece to the waste of the workpiece already in the processing room safely, because below the workpiece no disturbing parts are present, so that the waste or cut can fall down trouble-free, ie that the sheet-like workpiece is held and tensioned only at the side edges via the transport and / or fastening device and the rest of the workpiece is freely suspended on the underside or arranged without a sheet. A further advantage lies in the fact that, as a result of the passage of the laser beam through the workpiece, it is not possible to strike an element or part directly below the workpiece, from which the laser beam is reflected. In such a system, the laser beam strikes only far below on reflective parts or elements, so that the spot of the laser or the focus is already scattered so far that can cause any destruction or quality-reducing training on the workpiece at a mirror.

An advantage is the design in which the transport and / or fastening device is formed by at least one gripping chain, are arranged on the gripping elements for securing the flat, in particular sheet-shaped, workpiece, and that the workpiece is stretched and secured over the gripping chain. As a result, a mechanical coupling of the drive system, so the chain to the fastening system, so the gripping elements created, so that safe operation is guaranteed.

It is also an embodiment of advantage in which in the transport and / or fastening device, the workpiece is detected and clamped on two sides via gripping elements of a gripping chain, wherein the workpiece is transportable and positioned in the processing area on the gripping chain. This ensures that the workpiece is simply clamped to the side edges and by driving the chain this is the workpiece transported. Here, a very large number of gripping elements can be arranged so that the sum of the clamping forces for the workpiece are very high and thus a very large clamping force can be achieved. This is necessary insofar as a sagging of the workpiece should be avoided, as with sagging workpieces, the focal point for the laser can not be optimally adjusted. In the prior art, this is by the use of bottom plates or support elements on which the workpiece rests during processing, are used.

An advantage is an embodiment in which at least one transport and / or fastening device, in particular one of the gripping chains, is designed to be adjustable transversely to the conveying direction. This makes a quick and easy adaptation to the most diverse formats of the workpiece possible. In particular, after a single manual adjustment via adjustment keys on the display and input element, this position can be stored in order to use it again at a later time. It is of course possible that a variety of such settings can be stored. Preferably, further parameters are stored for the position.

Also advantageous is a design in which the two gripping chains are aligned parallel to each other or that the gripping chains are arranged diverging from the introduction of the workpiece to build a voltage on the workpiece. In a parallel alignment of the gripping chains a constant clamping force is generated on the workpiece, which is advantageous for very sensitive workpieces. If the gripping chains run apart angularly, a tensile force is built up during transportation by the gripping elements, so that the clamping force on the workpiece is increased during transport, which reliably avoids sagging of the workpiece.

A design is advantageous in which the transport and / or fastening device and / or the laser for machining the workpiece are designed to be adjustable relative to each other. As a result, the design of the system can be adapted to the quality requirements, since the laser no longer has to cover the entire area, but the laser, in particular the 3-axis galvosystem, and / or the workpiece are adjusted to one another during processing outside its range, so one

Editing is possible. As a result, the size and cost of the laser system, in particular the laser and the 3-axis galvosystem, significantly reduced.

Another advantage is an embodiment in which the transport and / or fastening device is formed by a double gripping chain, in particular a double chain, in which always two chain links are parallel and connected by a common continuous axle element, arranged with gripping elements arranged on one side , This will not create a safe transport system without sagging the gripping chain. Preferably, the gripping chain is attached tension-free as possible to allow trouble-free operation.

But it is also an embodiment of advantage in which a bottom plate or support elements for the workpiece is formed lowerable in the processing space, preferably before the processing to achieve a so-called floating state of the workpiece or blade-free workpiece assembly, the bottom plate or the support elements is lowered or are , This ensures that the waste can fall unhindered down and at the same time no reflections of the laser can occur directly below the workpiece.

Moreover, the object of the invention is achieved by a laser cell, in which the workpiece is fixed in the processing space such that it is only on the side edges, in particular in a range up to 1 cm, fixed and preferably tensioned, so that a bottom of the workpiece is completely free floating or is positioned without blades.

The advantage here is that when penetrating the laser, in particular the laser beam, on the underside of the workpiece no reflective elements are present. The laser beam radiates far into a shaft, so that the focal point when hitting a material is already so large that no damage or quality impairments can occur more. Furthermore, it is advantageously achieved that a complete separation of the waste from the use of the workpiece can be accomplished, i.e. that the waste is completely cut out so that it can fall down into the shaft without interference. This also prevents the material from breaking down on the workpiece, which is usually caused by interference contours, such as a base plate or a supporting element. This results in a very significant advantage, since the waste in the processing room is separated from the use of the workpiece, usually no reworking on the workpiece longer required, so that high costs can be saved and short production times can be achieved.

An advantage is an embodiment in which the laser is formed by a CO2 laser. This ensures that a commercially affordable laser can be used and a variety of different materials can be processed.

But it is also a training advantage in which the processing space is designed to separate the waste from the benefits of the workpiece. As a result, a post-processing of the workpiece is saved.

However, an embodiment is also advantageous in which a shaft for receiving the waste is arranged in the processing space, in particular between the transport and / or fastening system. This ensures that a very large amount of waste can be collected in the shaft, which can be removed via a residual drawer. Thus, a long-term operation of the system is possible because the placement of the workpieces at the feeder, the removal of the workpieces on the stacker and the emptying of the waste through the remaining drawer during operation of the system, in particular the laser cell is possible.

Finally, an embodiment is advantageous in which the transport and / or fastening device is formed by a gripping chain and gripping elements attached thereto. As a result, an attachment of the workpiece and a transport of the workpiece in a single operation is simultaneously made possible. Due to the mechanical coupling, a high process reliability of the laser cell is achieved.

As to the previously discussed advantages, it should be understood that these may be applicable to other features of the invention, but are not presented each time to avoid repetition.

The invention will now be described in the form of embodiments, it being understood that the invention is not limited to the illustrated and described embodiments or solutions.

Show it:

1 is a schematic representation of a device with a laser cell to,

Processing of flat, in particular sheet-shaped, workpieces;

Fig. 2 is a front view of the device with the safety door open according to Fig. 1;

3 is a perspective view of the device with degraded upper part of

Laser cell of Figure 1 for better representation of the workpiece transport. 4 shows a perspective view of a chain drive for the device;

5 shows a perspective view of a section of the chain drive, in a simplified schematic representation;

6 shows a side view of a guiding and / or supporting device for the

Chain drive of the device;

7 shows a side view of a gripping chain with gripping elements of the chain drive;

8 is a perspective view of another embodiment of the

Device with a bottom plate in the processing space of the laser cell, in a simplified, schematic representation;

9 is a perspective view of another embodiment of the

Device with supporting elements in the processing space of the laser cell, in a simplified, schematic representation;

10 shows a perspective view of the device of FIG. 9 with lowered supporting elements in the processing space of the laser cell, in a simplified, schematic illustration according to FIG. 9; FIG.

11 is a perspective view of the device of FIG. 8 with an angular, lowered base plate in the processing space of the laser cell, in a simplified, schematic representation.

By way of introduction, it should be noted that in the various embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals and component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the described figure and are mutatis mutandis transferred to the new situation in a change in position. Also, individual features or combinations of features from the illustrated and described embodiments may represent separate inventive solutions.

1 to an embodiment of a device 1 with a laser cell 2 for processing a flat, in particular sheet-shaped, workpiece 3 is shown, in this embodiment, for automatic processing and feeding of the workpiece 3, a feeder 4 for stacking the workpieces. 3 , an alignment station 5 for straight feeding of the workpiece 3 and a destacker 6 for receiving the processed workpieces 3 are arranged. Flat workpieces 3 are e.g. Papers, coated papers, films, laminates, cardboard, etc., using as laser processing e.g. Mark, engrave and cut can be performed.

In such a device 1, automatic processing of the workpiece 3 is preferably carried out, in which one or more workpieces 3 are deposited on the feeder 4 (shown by dashed lines), whereupon a single workpiece 3 is picked up by a removal device 7 on the feeder 4 or directly by the alignment station 5 is removed. The workpiece 3 is conveyed in the alignment station 5 via a drive, in particular a vacuum drive 8, to a transport and / or fastening device 9, wherein in the alignment station 5 the workpiece 3 is aligned with a stop surface 10, so that the workpiece 3 is always straight in the laser cell 2 is introduced. For this purpose, first a section 11 of the abutment surface 10 extends at an angle, whereupon a further section 12 follows before the transfer to the transport and / or fastening device 9 with a straight course. However, it is possible that only one stop surface 10 is arranged with a straight course. The longer the rectilinear portion 12 of the abutment surface 10 is formed, the longer workpieces 3 can be processed by the device 1, in particular the laser cell 2, since the workpiece 3 must rest completely against the rectilinear portion 11 to be conveyed straight into the laser cell 2 to be able to. At the end of the alignment station 5, the workpiece 3 is taken over by the transport and fastening device 9, as can be better seen in Fig. 3. The workpiece 3 is thus transported in the aligned state into a processing space 13 of the laser cell 2 for processing. After machining, the workpiece 3 is transferred from the processing room 13 to the stacker 6 and stored. At the stacker 6, the workpieces 3 are stacked one above the other. In such a system, it is possible that already during the machining of the workpiece 3, a further workpiece 3 is removed from the feeder 4 and is aligned via the alignment station 5. As a result, the next conveying path to the processing space 13 is shortened, since the workpiece 3 is in waiting position at the alignment station 5 in front of the laser cell 2. It is also possible for a further workpiece 3 in the laser cell 2 to be in the waiting position already during the machining of the workpiece 3.

It is also possible that for very large, especially long, workpieces 3, these are not completely introduced into the processing space 13 for processing, but that they can be tracked during processing accordingly, ie that in very long workpieces 3 a part of the workpiece 3 protrudes from the laser cell 2 and this is automatically tracked during the process, the front first processed area of the workpiece 3 is passed to the destacker 6 accordingly.

But it is also a manual machining operation instead of the previously fully automatic described machining operation possible or can be set in the device 1 both an automatic and a manual machining operation, in which case the plant for manual processing is shown in Fig. 2. A manual machining of the workpiece 3 can for example take place such that the workpiece 3 via a safety door 14 in the processing space 13 on a bottom plate 15a or support members 15b, as shown and described in a further embodiment of FIGS. 8 to 11 and in this Embodiment of Fig. 1 to 7 can be adopted, is stored, whereupon in the manual activation of the machining of the workpiece 3 or automatically when closing the safety door 14, the workpiece 3 via the transport and / or fastening device 9, the workpiece 3 is fixed and optionally positioned is, whereupon the bottom plate 15a or the support members 15b are lowered or the workpiece 3 is raised via the transport and / or processing device 9 and the machining of the workpiece 3 takes place, whereupon after completion of the processing process, the bottom plate 15a or the support elements 15b back into the originally original position can be adjusted and the attachment of the workpiece 3 via the transport and / or processing device 9 is released. Subsequently, the workpiece 3 can be removed by opening the safety door 14 and optionally a new workpiece 3 are inserted. In this case, it is also possible for the bottom plate 15a or the support elements 15b to be automatically moved from a lowered rest position to a support position when the safety door 14 is opened, so that the workpiece 3 can be laid flat with the transport and / or fastening device 9. With such a design, the bottom plate 15a or the support elements 15b will be lowered, for example, up to 10cm. For the sake of order, it should be noted that in Fig. 2, the reference numeral 15 has been used in place of the bottom plate 15a or support members 15b, since in the device 1 in Figs. 1 to 7 both systems can be used and thus a general reference numeral 15 was used ,

In the case of the laser cell 2 used, a laser 16 with a 2- or 3-axis galvosystem 17 is used, the detailed structure not being discussed in more detail, since this can be known and taken from the prior art. It is merely pointed out that the construction of the device 1 comprises at least the laser cell 2 and preferably a display element connected thereto, in particular a computer, wherein the laser cell 2 with the processing space 13 for positioning the workpiece 3 via the transport and / or fastening device 9, with at least one radiation source in the form of the laser 16 with corresponding deflection elements and focusing unit for the laser 16 mounted above the processing space 13, and with a control unit 18 which is integrated, for example, in the top 19 and / or bottom 20 of the laser cell 2 for reception is formed on an external component, in particular on the display and input element 21, data, in particular a graphic and / or text, and controlling the beam source or the laser 16 is formed. As laser 16, a CO2 laser is preferably used, so that a wide range of materials such as acrylic, paper, cardboard, MDF, polystyrene or foam can be engraved and / or cut.

A detailed description of the 3-axis galvosystem 17 is omitted, since this is known from the prior art and can be used. However, what is essential in the case of the laser cell 2 is that the entire laser system, that is to say the laser 16 and the 3-axis galvosystem 17, can be adjusted transversely and / or longitudinally to the transport direction of the workpiece 3. This ensures that a larger area can be covered with very high accuracy for the machining of the workpiece 3, since the 3-axis galvosystem 17 does not have to cover the entire processing area. For example, in a transverse displacement of the laser 16 and / or 3-axis galvosystem 17 very wide workpieces 3 can be processed or it can be used with very small marking fields, the engraving and cutting quality is very high, since the 3-axis galvosystem 17 must not be able to cover the entire processing space 13, but is designed only over a sub-area and is moved accordingly.

Furthermore, it is also possible with the device that a laser processing on-the-fly or in clock mode is possible. For very long workpieces, the machining of the workpiece 3 can be done in several steps. In particular, it is possible that the transport and / or fastening device 9 moves forwards or backwards or can be adjusted.

In Fig. 3, some parts, in particular of the upper part 19 of the laser cell 2, the feeder 4 and the destacker 6, disassembled in the device 1 in order to better represent and describe the essential transport path for the workpiece 3. As can be seen form the vacuum drive 8 and the transport and / or fastening device 9 a straight, preferably flat, surface, so that the workpiece 3 can be easily from the vacuum drive 8 to the transport and / or fastening device 9 slide and passed.

It is now essential that the transport and / or fastening device 9 is formed such that it on the one hand the workpiece 3 is fixed and held on tension and on the other hand at the same time allows a promotion of the workpiece 3 by the laser cell 2. According to the invention, in this embodiment of FIGS. 1 to 7 there is no base plate 15a or supporting elements 15b in the laser cell 2, as shown in the exemplary embodiments of FIGS. 8 and 9, so that a waste 22 is separated from the utility 23 of the workpiece 3 can. In the embodiment shown, the waste 22 falls in the laser cell 2, in particular in the processing room 13, directly into a slot 24 below and between the transport and / or fastening device 9. In the processing room 13, the workpiece 3 is fixed so that this only on Side margins 25,26, in particular in a range up to 1 cm from the side edge 25,26, fixed and preferably tensioned, wherein a bottom 27 of the workpiece 3 on the shaft 24 completely free floats or is positioned without blades. This ensures that the waste 22 can fall down trouble-free and not, as in the prior art, disturbing support elements 15b or bottom plates 15a are in the way where the waste 22 can get caught and thus can not be transported to the outside or the workpiece 3 is destroyed or damaged during transport to the outside by stuck waste 22. The prior art avoids this problem mostly in that small webs between waste 22 and benefits 23 are left standing when cutting, so that the waste 22 remains fixed in the workpiece 3 and must be subsequently removed manually. Such a procedure is not necessary in the inventive solution, since the waste 22 can fall directly into the slot 24 down without the disturbing contours in the way.

Through the shaft 24 is further achieved that in the processing region of the laser 16, this can not be reflected, since when penetrating the laser beam from the laser 16 this below the workpiece 3 now in the slot 24 radiates down and thus no negative impact on the workpiece 3 can exercise, whereas in the prior art below the workpiece 3 support elements or support elements 15b and bottom plates 15a are arranged, to which the laser beam of the laser 16 strikes when cutting the workpiece 3 and thus directly below the workpiece 3, the laser beam can be reflected so that the cutting contours are damaged because the laser beam still has a very small focus point.

However, in order for such a solution to be able to be used with a slot 24, a special transport and / or fastening device 9 is necessary, which in the embodiment shown is used by a gripping chain 28 with gripping elements 29, as shown in detail in FIG , However, it should be pointed out for the sake of form that the implementation of the transport and / or fastening device 9 can also take place elsewhere, for which purpose always an attachment, tension and transport of the workpiece 3 is necessary. As can be seen in Fig. 3 and the following figures, in the embodiment always two gripping chains 28 are used for both side edges 25,26 of the workpiece 3, but also a training with only one gripping chain 28 and another fastening device, such as a clamping device, possible is in which, for example, the clamping elements are moved by driving the gripping chain 28.

When conveying the workpiece 3 from the vacuum drive 8 to the transport and / or fastening device 9, in particular the two gripping chains 28, a straight, preferably flat, course is formed, so that the workpiece 3 can be transferred bumpless. In the transport and / or fastening device 9, the workpiece 3 is grasped and tensioned on two sides via the gripping elements 29 of the gripping chain 28, whereupon the workpiece 3 is transported and positioned in the processing region 13. By means of the transport and / or fastening device 9, in particular the gripping chains 28, the workpiece 3 can be moved forwards or backwards during the machining process, but preferably machining takes place in a stationary position. Furthermore, it is possible for at least one transporting and / or fastening device 9, in particular one of the gripping chains 28, to be displaced transversely to the conveying direction 30, as shown by an arrow 30, in order to adapt it to the most varied formats of the workpieces 3 manually and / or. or to be able to make automatically.

In Fig. 4, a chain drive 31 of the transport and / or fastening device 9 is now shown in more detail from the device 1, wherein in Fig. 5, an enlarged section 32, which is marked with a dashed circle in Fig. 4, is shown. In this case, the chain drive 31 on a mounting frame 33 for attachment and storage of axles and other elements, and a bottom elements 34 for attachment in the laser cell 2. It can also be seen that the bottom elements 34 are arranged only at the edge region of the preferably plate-shaped mounting frame 33 so that in the central region 35, which corresponds to the processing space 13 for the laser 16, is free and no interference or interference contours are present, so the waste 22 unhindered down through the chain drive 31 can fall into the slot 24.

For receiving the gripping chain 28 now gears 36 are provided, the gears 36 are arranged on a guide shaft 37. The guide shaft 37 has guide grooves 38, in the form-fitting guide knobs (not shown) of the gear 36 engage. This ensures that the gear 36 can be moved along the guide axis 37, wherein the non-positive coupling takes place during a rotational movement of the guide shaft 37 via the guide groove 38 and guide knobs on the gears 36. However, to put the gear 36 in a rotational movement, one of the two guide shafts 37 is connected to a drive motor 39, so that when energized by the drive motor 39, the guide shaft 37 is set in rotation and thus the gripping chains 28 are set in motion via the gears 36 , It is pointed out for the sake of form that in the embodiment shown, a double-membered gripping chain 28 is used, so that the gears 36 are correspondingly designed as double gears 36. Of course, it is also possible that only a simple gripping chain 28 can be used. For the transverse adjustment of the transport and / or fastening device 9, in particular the gears 36 for the gripping chains 28, a preferably two adjusting devices 40, in particular a spindle drives 41, consisting of spindle shaft 42, spindle drive 43 and an adjusting motor 44 parallel to the two guide axis 37 , provided, wherein the adjusting device 40 is rigidly or fixedly connected for example via a connecting elements 45 with the gears 36. If the adjusting motor 44 is activated or sent to this data over the length of the adjustment, in particular the adjustment, it activates the spindle drive 41, so that the spindle drive 43 shifts along the spindle shaft 42 and thus by the connection of the spindle drive 43 with a gear 36 via the connecting elements 45 now the gear 36 along the guide axis 37 is moved. In the embodiment shown, the spindle drives 43 are connected to only one gripping chain 28, so that only this one gripping chain 28 is transversely adjustable. Of course, it is also possible that 41 other systems from the prior art can be used instead of the spindle drive.

Furthermore, it is provided in the chain drive 31 that the gripping chains 28, in particular with the individual chain links 46, connected gripping elements 29 are mechanically opened and closed, including with the gears 36, a pressure roller 47 is coupled to open the gripping elements 29. In this case, the gripping elements 29 are guided over the pressure rollers 47, so that the pressure roller 47 builds up a corresponding pressure on the gripping elements 29 and these are thus opened, as will be described later in detail to Fig. 6. Furthermore, it can still be seen in FIG. 4 that further amplification and / or auxiliary elements 48 are arranged.

In the device 1, the chain drive 31 has the task of fastening, transporting and preferably tensioning the workpiece 3, in order to prevent sagging of the flat, preferably sheet-shaped, workpiece 3. For this purpose, the two gripping chains 28 are aligned parallel to each other via the chain drive 31, so that a constant tension on the workpiece 3 is generated or it can increase the clamping force gripping chains 28 angularly diverging, ie, that a distance 49 of the gripping elements 29 and thus the gripping chains 28th at the beginning of conveying the transport and / or fastening device 9 is aligned with the width of the workpiece 3, whereas the other gears 36 and thus the gripping elements 29 at the output of the chain drive a slightly wider distance 50, so that the gripping chains 28 run apart, causing during the Transportes the voltage on the workpiece 3 is increased because the gripping elements 29 pull the workpiece 3 to the outside. The chop-shaped gripper element 65 of the gripper 64 may be provided with a plastic cap or the support surface 62 with a plastic layer in order not to mechanically injure the workpiece 3

However, in order for a safe transport of the workpiece 3 without sagging is possible, it is necessary that the chain drive 31 is equipped with corresponding guide and / or support device en 51, which are attached for example to the mounting frame 33. The guiding and / or supporting device 51 embeds the gripping chain 28 in the conveying direction 30 so that the gripping chain 28 and in particular the gripping elements 29 themselves likewise can not sag. This is essential insofar as the chain tension of the gripping chain 28 can thereby be kept as low as possible, ie a tension-free fastening of the gripping chain 28 is made possible. It is only necessary that the guiding and / or supporting device 51 is arranged only on the sheet-guiding side of the gripping chain 28 and on the opposite side of the gripping chain 28 is arranged freely suspended between the gears 36. However, it is also possible that to build a defined chain tension a spring-mounted gear (not shown) is arranged in the exposed area, as is known from the prior art.

A detailed detail of an exemplary embodiment of the guiding and / or supporting device 51 is shown in FIG. 6, wherein the area following the toothed wheels 36 with still open gripping elements 29 is shown. Furthermore, in Fig. 7, the gripping chain 28 is shown with the attached gripping member 29 in detail.

The guiding and / or supporting device 51 in this case has a base element 52 and side element 53, via which the guiding and / or supporting device 51 can be fastened. On the bottom element 52, a sliding body 54,55 are arranged for each chain link 46, on which the chain link 46 rests and corresponding pressure forces can be built to achieve a stable course of the gripping chain 28. Flierzu is attached to the side member 53, a cover 56, on which in turn a further sliding body 57 is arranged. The sliding body 57 is thereby positioned for that chain link 46 that is connected to the gripping element 29, so that this chain element 46 is guided between two sliding elements 55 and 57. The individual sliding bodies 54, 55 and 57 can have a height-adjustable sliding element 58.

Furthermore, a support element 59 for a base body 60 of the gripping element 29 is fixed on the bottom element 52, so that a support surface 61 of the base body 60 can be supported thereon. The base body 60 further has a bearing surface 62 for the workpiece 3, which, however, serves for supporting on a supporting element 63 which is fastened to the base element 52 at the same time. The gripping chain 28 with the gripping element 29 is inserted into the guiding and / or supporting device 51 in such a way that the sliding member 58 of the sliding body 54 presses the chain link 46 in the direction of the cover element 56, so that the support surface 62 points downwards in the direction of the rigid, fixed construction Bottom member 52 is pressed and thus pressed on the support member 63. By such a slight tension of the gripping chain 28 is achieved that they can not sag over the entire conveying path of the chain drive 31, but is guided safely, since the support surface 62 rests on the support element 63 over the entire area. The further sliding bodies 57 and 58 are set in such a way that they allow only a very small free space for the chain link 46, so that only a slight movement of the gripping chain 28 is possible. This serves primarily for positioning the height of the support surface 62. The end region 69 of the gripper element 29 serves to position the chain perpendicular to the running direction. The end region 69 of the gripper element 29 is guided between the main body 59 and the support element 63.

However, in order to fix the workpiece 3 with the gripping element 29, the gripper 29 has a gripper 64, wherein the gripper 64 is formed in the illustrated embodiment as an independent component, ie, that the gripping member 29 in the illustrated embodiment of two components, namely once through the main body 60 and once by the gripper 64 is formed. It is essential here that the gripper 64 is movably arranged so that it can be opened and closed, wherein between the base body 60, in particular the support surface 62, and a preferably chop-shaped gripping member 65 of the gripper 64, the workpiece 3 is clamped, ie, that at closed gripper 64 and inserted workpiece 3, the end portion of the gripper 64, in particular the gripping member 65, presses against the support surface 62 of the base body 60 and thus the workpiece 3 is clamped, in order to achieve a very high fastening force preferably with each chain link 46, a gripping element 29th is attached. The attachment is shown in broken lines in Fig. 6.

Of course, it is possible that only at every second or third chain link 46 or depending on the required fastening force on certain selected chain links 46, a gripping member 29 is arranged.

The gripper 64 is arranged in the base body 64 such that it protrudes through a slot (not shown) located in the support surface 62 and a preferably chack-shaped upper part 66 is arranged with the gripping element 65 above the support surface 62, wherein a spring element arranged on the shaft 67 68 holds the gripper 64 in position by the spring element 68 pushes the upper part 66 upwards. The spring element 68 may be formed from a wound steel spring, a resilient plastic or the like. The shaft 67 further extends into and through a receiving region 69 in the base body 60, wherein the receiving region 69 has an opening (not shown), through which an end portion 70 of the shaft 67 extends below the base body 60 to the outside. This makes it possible that a force is exerted on the end portion 70 via a pressure element 71 or by the pressure roller 47, the gripping member 29, in particular the gripper 64, against the spring force of the spring member 68 pushes upwards, so that the upper part 66 with the Gripping element 65 according to arrow 72 in the slot to the rear, ie in the direction of gripping chain 28, is pivoted and opened. The gripping element 65 is thereby opened to a defined distance 73. Here, it is essential that the upper part 66 is pivoted in the direction of chain links 46, so that the workpiece 3 can slide freely on the support surface 62 and / or can be lowered. In this case, the upper part 66 is pivoted by a defined distance 74 to the rear, so that sufficient space for feeding the workpiece 3 is present. The main advantage of such a mechanical structure is that to open and close the gripper 64 this must be mechanically guided only via a pressure element 71 and / or pressure roller 47 so that the gripper 64 are automatically opened against the spring force and thus no tax-technical processes necessary are. To close the gripper 64, it is only necessary that no pressure element 71 or no pressure roller 47 is no longer present, so that due to the spring element 68 of the gripper 64 in the closed position, as shown in phantom in Fig. 7, is moved. Such a mechanical solution operates error-free, so that a safe and very long operation of the system is possible.

In the device 1 it is provided that a seamless transition from the pressure roller 47 is provided to the printing elements 71, so that the gripper 64 remains open at the transition. Only at a certain point 75, 76, as shown schematically by a dashed line in Fig. 4, the gripper 64 are closed or opened, wherein in the conveying direction 30 at the point 75, the gripper 64 are closed, whereas at the point 76, the gripper 64 for Transfer of the workpiece 3 to the stacker 6 are opened, that is, that at these points 75,76 the pressure element 71 begins or ends. In this case, it is possible for all grippers 64 to be opened or closed simultaneously or in a time- or position-offset manner, in which case only points 75, 76 need to be defined differently for each chain. For safety, the guiding and / or supporting device 51 is still provided with a protective element 77, so that the gripping chains 28 and the gripping elements 29 are protected from contact.

In the embodiment described above, the transport and / or fastening device 9, in particular the gripping chain 28 with the gripping elements 29, thereby designed or formed so that only a very narrow area on the side edges 25 is required for the attachment of the gripper 64. Preferably, the gripper 64 engages between 1 to 5 mm into the workpiece 3. Furthermore, it is provided that the conveying speed of the transport and / or fastening device 9 is greater than the conveying speed of the vacuum drive 8, so that the workpiece 3 is pulled under tension from the aligner 5 and thus achieves a wrinkle-free and non-sagging attachment of the preferably sheet-shaped workpiece 3 becomes. As described above, the transport and / or fastening device 9 is preferably formed by a double gripping chain 28, in which always two chain links 46 run parallel and is arranged over a common continuous axle element 78 with gripping elements 29 arranged on one side, so that a very rigid construction is achieved.

In the course of the embodiment of FIGS. 1 to 7 described above, it is described that the waste 22 falls from the use 23 of the workpiece 3 in the processing space 13 into the shaft 24 where it is collected or led outwards. However, it is also possible that when cutting out a particular shape, such as a star, this is needed as a benefit 23 and the waste 23 remains attached to the transport and / or fastening device 9, so that the utility 23 falls into the well 24 down or in the shaft 24 is collected on top of each other and the waste 22 is transported to the stacker 6 for removal.

FIGS. 8 to 11 show a further exemplary embodiment in which a bottom plate 15a, according to FIGS. 8 and 11, or a supporting element 15b, according to FIGS. 9 and 10, is now arranged in the processing space 13.

The bottom plate 15a or the support member 15b serve that the workpiece 3 can be placed or stored thereon, ie, that in conveying the workpiece 3 in the processing space, the bottom plate 15a or the support member 15b as support for the transport and processing device 9 in the Resting position according to Figures 8 and 9 are present and thus the workpiece 3 can not sag. This rest position is also used in a manual machining process in which the workpiece 3 is placed over the safety door 14.

Preferably, the base plate 15a or the support member 15b is removed before machining the workpiece 3 with the laser 16, so that the workpiece 3 is again arranged without leaves or floating and thus reflections of the laser 16 or a hanging of the waste 22 are avoided, ie that in the processing space 13, the bottom plate 15a or the support members 15b are lowered for the workpiece 3 before machining the workpiece 3 to create a so-called floating state of the workpiece 3 during processing, as shown in Figs. 10 and 11 can be seen. 10, the support elements 15b was lowered straight down, whereas in the embodiment in Fig. 11, the bottom plate 15a was lowered and angularly adjusted, so that the waste 22 slips in a certain direction, where he removes a residual drawer 79 can be.

Of course, it is possible that when machining a very thin, easily destructible paper as a workpiece 3, a lowering of the bottom plate 15a or the support elements 15b can be deactivated during the machining of the workpiece 3, to avoid sagging of the workpiece 3. In the case of very thin workpieces 3, it is usually not possible to exert very high tensile forces or clamping forces on the workpiece 3, since otherwise it will tear, so that the base plate 15a or the supporting element 15b will support the transport and / or fastening device 9.

However, it is also an embodiment possible, during which the bottom plate 15a or the support elements 15b always the rest position shown in FIG. 8 and 9 remain, for which purpose a simplified transport and / or fastening device 9 can be used. The transport and / or fastening device 9 can be formed by a plurality of conveyor rollers, belt drive or simply by clamping or holding elements in a pure manual application.

Furthermore, it is possible that the gripper 64 is provided with a plastic cap (not shown). This is advantageous when very sensitive material has to be processed.

Furthermore, it is possible that the support surface 62 of the gripper element 29 is provided with a plastic support (not shown). This is advantageous when very sensitive material has to be processed.

In principle, however, the laser cell 2, in particular the embodiments of FIGS. 8 to 11, can also be operated in such a way that the work piece 3 is fixed in the processing space 13 in such a way that it only engages the side edges 25, 26, in particular in an area up to 1 cm, via at least one gripping chain 28 with gripping elements 29 and preferably tensioned, wherein the flat preferably sheet-shaped workpiece 3 rests on a bottom plate 15a or on supporting elements 15b, ie, during operation, the bottom plate 15a or the supporting elements 15b in the rest position are left in accordance with Figures 8 and 9 to prevent sagging of the workpiece 3. In particular, this type of machining has an advantage when very thin, easily rupturable workpieces 3 are to be processed, since no high clamping forces may be exerted by the gripping chains on the workpiece.

In this case, automatic or manual processing, as described previously in FIGS. 1 to 7, is also possible with such a design, ie, the same processes and structures as described in FIGS. 1 to 7 are used in this exemplary embodiment ., so that a repetition is omitted. Only during the machining process, the bottom plate 15a or the supporting elements 15b is not lowered, so that there workpiece 3 rests on it.

Since, when using the base plate 15a or the supporting elements 15b, these are arranged or positioned between the two gripping chains 28, it is necessary that during an adjustment of a gripping chain 28, in particular when the format is reduced, the base plate 15a or the supporting elements 15b be replaced or it is designed for the smallest possible format to be processed. But it is also possible that the arranged between the gripping chains 28 bottom plate 15 a or support members 15 b in size, preferably automatically, be adjusted or adjusted when adjusting the gripping chains 28.

However, it is also possible in this embodiment, that in the processing space 9, the bottom plate 15a or the support members 15b are lowered for the workpiece 3 before machining the workpiece 3 to create a so-called floating state of the workpiece 3 during processing, this before Machining process must be set.

It can therefore be said that in the described invention several embodiments are described, namely - the laser cell 2 with the shaft 24; - The laser cell 2 with lowered base plate 15a or Absturtzelemente 15b during the machining of the workpiece 3; the laser cell 2 with a bottom plate 15a or support elements 15b for supporting the workpiece 3 during processing;

However, the structure of the individual embodiments, in particular of the investor 4, the alignment station 5, the laser cell 2 and the destacker 6 constructed structurally, with only 31 corresponding adjustments were made between the chain drive, so in the description is not a detailed description for each embodiment was created.

For the sake of order, it should finally be pointed out that for a better understanding of the construction of the system 1 and its components or their components, they have been shown partially unevenly and / or enlarged and / or reduced in size.

Furthermore, individual features or combinations of features from the illustrated and described different embodiments may form separate, inventive or inventive solutions.

Claims (28)

claims: 1. A method for processing flat, in particular sheet-shaped, workpieces (3), wherein the workpiece (3) via a transport and / or fastening device (9) in a processing space (13) of a laser cell (2) inserted or fed and positioned is, whereupon a machining of the workpiece (3) by a laser (16) and then the workpiece (3) from the processing space (13) is conveyed or removed, characterized in that in the processing space (13) the workpiece (3) is fixed so that this only at the side edges (25,26), in particular in a range up to 1 cm from the side edge (25,26), attached and preferably tensioned, wherein a bottom (20) of the workpiece (3) completely is levitating freely or positioned sheet-free. 2. The method according to claim 1, characterized in that preferably an automatic machining of the workpiece (3) takes place, in which one or more workpieces (3) are deposited on a feeder (4), whereupon a single workpiece (3) from an alignment station (5) is removed and aligned and the workpiece (3) from the alignment station (5) via a drive, in particular a vacuum drive (8), to the transport and / or fastening device (9) is transferred, whereupon the workpiece (3) is transported into the processing space (13) for processing and then transferred from the processing space (13) to a stacker (6). 3. The method according to claim 2, characterized in that during processing of the workpiece (3) already a further workpiece (3) from the feeder (4) is removed and aligned over the alignment station (5). 4. The method according to claim 1, characterized in that a manual processing of the workpiece (3) takes place, in which the workpiece (3) via a safety door (14) in the processing space (13) on a bottom plate (15a) or supporting elements (15b ), whereupon during manual activation of the machining of the workpiece (3) or automatically upon closing of the safety door (14) the workpiece (3) is fastened and possibly positioned by the transport and / or fastening device (9) is, whereupon the bottom plate (15a) or the support elements (15b) are lowered or the workpiece (3) via the transport and / or processing device (9) is raised and the machining of the workpiece (3) takes place, whereupon the bottom plate (15a) or the support elements (15b) are moved back to the original position and the attachment of the workpiece (3) via the transport and / or processing device (9) is solved. 5. The method according to one or more of the preceding claims, characterized in that in the processing space (13) preferably a waste (22) from the use (23) of the workpiece (3) is separated. 6. The method according to one or more of the preceding claims, characterized in that in the transport and / or fastening device (9) the workpiece (3) on two sides via gripping elements (29) of a gripping chain (28) detected and the gripping chains (28 ) the workpiece (3) is tensioned, whereupon the workpiece (3) is transported and positioned in the processing area (13). 7. The method according to one or more of the preceding claims, characterized in that at least one transport and / or fastening device (9), in particular one of the gripping chains (28), is adjusted transversely to the conveying direction. 8. The method according to one or more of the preceding claims, characterized in that the two gripping chains (28) are aligned parallel to each other or arranged the gripping chains (28) diverging from the insertion of the workpiece (3) for building a voltage on the workpiece (3) become. 9. The method according to one or more of the preceding claims, characterized in that the gripping elements (29) for fixing and securing the sheet-shaped workpiece (3) in a defined region of the conveying path simultaneously or offset close or open. 10. The method according to one or more of the preceding claims, characterized in that the transport and / or fastening device (9) has a higher conveying speed than the conveying speed of the workpiece (3) at the alignment station (5). 11. The method according to one or more of the preceding claims, characterized in that the transport and / or fastening device (9) and / or the laser (16) for machining the workpiece (3) are adjusted relative to each other. 12. The method according to one or more of the preceding claims, characterized in that the transport and / or fastening device (9) by a double gripping chain (28), in which always two chain links (45) parallel and via a common continuous axle ( 77) is connected with arranged on one side gripping elements is formed. 13. The method according to one or more of the preceding claims, characterized in that in the processing space (9) a bottom plate (15a) or supporting elements (15b) are lowered for the workpiece (3) before machining the workpiece (3) to a so-called Levitation of the workpiece (3) to create during processing. 14. The method according to one or more of the preceding claims, characterized in that when processing a very thin, easily destructible paper as a workpiece, lowering of the bottom plate or the supporting elements during machining of the workpiece can be deactivated. -> Advantage: The tension of the paper can be reduced so that even very thin workpieces can be machined. 15. Device (1) for performing the method according to one or more of claims 1 to 14, comprising at least one laser cell (2) with a processing space (13) for positioning a workpiece (3) and a transport and / or fastening device (9 ) for feeding the workpiece (3) into the processing space (13), wherein preferably a feeder (4) for stacking flat, preferably sheet-shaped, workpieces (3) is arranged, and an alignment station (5) for an individually removed workpiece ( 3) from the feeder (4) is present, and in that a stacker (6) for depositing the machined workpieces (3) is coupled to the laser cell (2), characterized in that in the processing space (13) the workpiece (3) is fixed, that this only on the side edges (25,26), in particular in a range up to 1 cm, fixed and preferably tensioned, so that a bottom (27) of the workpiece (3) is completely levitating or leaf is freely positioned. 16. Device (1) according to claim 15, characterized in that the transport and / or fastening device (9) by at least one gripping chain (28) is formed on the gripping elements (29) for securing the flat, in particular sheet-shaped, workpiece ( 3) are arranged, and that on the gripping chain (28) the workpiece (3) is stretched and fixed. 17. Device (1) according to claim 15 or 16, characterized in that in the transport and / or fastening device (9) the workpiece (3) on two sides via gripping elements (29) of a gripping chain (28) is detected and stretched, wherein the workpiece (3) is transportable and positioned in the processing area (13) via the gripping chain (28). 18. Device according to one or more of the preceding claims 15 to 17, characterized in that at least one transport and / or fastening device (9), in particular one of the gripping chains (28), transversely to the conveying direction (30) is adjustable. 19. Device according to one or more of the preceding claims 15 to 18, characterized in that the two gripping chains (28) are aligned parallel to each other or the gripping chains (28) diverging from the insertion of the workpiece (3) to build up a voltage on the workpiece ( 3) are arranged. 20. Device (1) according to one or more of the preceding claims 15 to 19, characterized in that the transport and / or fastening device (9) and / or the laser (16) for machining the workpiece (3) relative to each other adjustable are. 21. Device (1) according to one or more of the preceding claims 15 to 20, characterized in that the transport and / or fastening device (9) by a double gripping chain (28), in particular a double chain, in which always two chain links (45 ) run parallel and connected by a common continuous axle (77) is formed with arranged on one side gripping elements (29). 22. Device (1) according to one or more of the preceding claims 15 to 21, characterized in that in the processing space (13) a bottom plate (15a) or support elements (15b) for the workpiece (3) is designed to be lowered, preferably before Machining to achieve a so-called floating state of the workpiece (3) or blade-free workpiece arrangement, the bottom plate (15 a) or the support elements (15 b) is lowered or are. 23. Laser cell (2) for engraving, marking and / or marking of workpieces (3), comprising at least one laser cell (2) and a display and input element connected thereto (21), in particular a computer, wherein the laser cell (2) with a processing space (13) for positioning a workpiece (3) via a transport and / or fastening device (9), at least with a radiation source in the form of a laser (16) with corresponding deflection elements and focusing unit, preferably a 3-axis galvo system ( 17), above the processing space (13), and with a control unit (18) for receiving data generated at an external component, in particular at the display and input element (21), in particular a graphic or text, and for controlling the laser is formed, characterized in that in the processing space (13) the workpiece (3) is fixed so that this only at the side edges (25,26), in particular in a range up to 1 cm, b eestigt and preferably is tensioned, so that a bottom (27) of the workpiece (3) is completely levitating or is positioned without a blade. 24. A laser cell according to claim 23, characterized in that the transport and / or processing device for carrying out the method according to one or more of claims 1 to 14 and / or for use in a device according to one or more of claims 15 to 22 is formed , 25. Laser cell (2) according to claim 23 or 24, characterized in that the laser (16) is formed by a CO2 laser. 26. Laser cell (2) according to one or more of the preceding claims 23 to 25, characterized in that the processing space (13) for separating the waste (22) from the utility (23) of the workpiece (3) is formed. 27. Laser cell (2) according to one or more of the preceding claims 23 to 26, characterized in that in the processing space (13), in particular between the transport and / or fastening system (9), a shaft (24) for receiving the waste ( 22) is arranged. 28. Laser cell (2) according to one or more of the preceding claims 23 to 27, characterized in that the transport and / or fastening device (9) by a gripping chain (28) and attached thereto gripping elements (29) is formed.