DE2300432A1 - METHOD AND DEVICE FOR CUTTING LAYERED MATERIALS - Google Patents

Description

Pö '«nio3weu ο ο η η / Q Dipl.! Rg. SAcrd tfüler-B8nier £ O U U ^ J Z

K = L-Lg. ikis-Hänrich Way ierliii-Dohlem, PodbidsSdailea 68

Berlin, January 3, 1973 22 961

Gerber Garment "ecimolosy Inc. G48-17I B

Hartford, Conn.
United States

Method and device for cutting laminated fabrics

The invention relates to a method and a device for Cutting of layered materials on top of each other, and in particular a method and apparatus in which a reciprocating cutting tool is controlled with Stroke speed when moving or guided along a cutting line through a support made of layered material Cutting edge is driven, whereby the layer material, for example, can consist of materials that are used for the production of Clothes, upholstery material or the like. Be used.

The use selbstätiger control means for cutting a large number of pattern pieces of layers of materials, such as textiles, from which garments, upholstery coverings and similar items manufactured v / ground, is the prior art by the U.S. Patent No. 5 ^l i95 492 known. In the cutting mechanisms disclosed there, a reciprocating cutting knife is moved up and down, generally perpendicular to the sheet material, and at the same time the cutting edge of the cutter is advanced and

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is guided along a predetermined cutting path by a digital or analog operating control device. The control device takes its basic commands from a storage medium, e.g. a punched card or a magnetic tape, on the the program for trimming is recorded. When reading the tape, the control device translates the basic commands through which put the cutting knife into operation and on a desired cutting line that forms the periphery of the pattern part represents, is guided along in cutting engagement with the fabric support. Because of the speed and accuracy with which the automatic trimmers produce a large number of pattern pieces from one of several Cutting layers of existing stacks of fabric enjoy Such a device is widely used, and is particularly advantageous for the clothing industry, v / o a large one Quantity of different pattern pieces are required.

When dipping a reciprocating cutting knife into a layer of laminate made of textiles, for example, and at its stroke-wise advance along a cutting line, the cutting knife being pulled out of the fabric layer during each stroke sequence and is immersed in it again, it must be ensured that the lifting speed is sufficiently high, so that the 'forward movement of the cutting knife is not faster is when the blade moves up and down and a process sometimes referred to as "quilting" occurs. When "stepping" the fabric is not completely severed at every point along the cutting line because the cutting knife during a The lifting sequence carried out by him was advanced too quickly and the fabric under the Schneideraaeaer when it was withdrawn passes without it being cut. The parameters,

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which determine the upper limit at which the up and down rated cutting edge can be advanced without a The quilting effect occurs, depend on the blade width, the stroke length of the blade and de: .- stroke speed. The hacky one The upward and downward movement of the blade is compared to a shorter stroke with the cutting knife resistant ir.i fabric remains preferred, especially when using thermoplastic vinyls or similar Materials rait low melting temperatures, v / eil the lead or the cutting edge in which the blade is moved back and forth, with a larger section of the cutting blade during each Stroke sequence is brought into contact and the heat generated by friction between the blade and the fabric is dissipated from the blade v / can earth. As a result, there is better heat transfer and there is less risk that the tissues will separate heat up to an elevated temperature and thus melt when the cutting knife is guided along the cutting line.

It is therefore understandable that in order to avoid "quilting" In the case of a cutting device with a fixed stroke rate and stroke speed, this stroke speed must be chosen so that a maximum feed speed of the cutting knife through the layers of fabric is given. The drive motor and the drive gear to carry out the lifting movement of the cutting knife are therefore with a view to a maximum feed rate of the cutting knife and not, as in the past, where the cutting knife is constantly with was operated at the planned speed. When choosing a fixed stroke rate it is necessary to consider the fact take into account that certain materials melt if the back and forth movement of the cutting knife causes excessive heat

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generated in the fabric layer. Locally occurring overheated Places on the cutting path can occur where the feed of the cutting knife is interrupted or v / o the feed speed of the cutting knife due to the limitations of the cutting mechanism became. For example, when using a cutting knife around curves that have a small radius, or on a very short one When a section or segment is advanced, it is common practice to reduce the cutting blade advance speed. in order to maintain an exact path guidance along the cutting path and an excessive or avoidable wear the mechanical components of the cutting mechanism. With a projected high stroke rate of the cutting knife to make quick traverses on the straight sections of the cutting path, it is possible to use Excessive V / poor due to certain points along this path, namely where the feed speed is reduced the longer frictional contact between the situation and the fast up and down moving blade is generated in the layer of fabric. The excessive heat can cause different layers of the fabric melt as well as "melt over the cut itself, so that the pattern parts are not completely separated from each other and from the rest of the tissue. In addition, the material itself can be damaged and thereby become worthless for the intended end product. It should be noted that there is a tradeoff in stroke rate with a usable traverse speed and avoiding the melting process at low feed speed must be made in a system in which the cutting knife is driven at a constant lifting speed becomes, and that consequently the performance of a cutting mechanism

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may not be optimal in such a system.

It is therefore the object of the invention to create a cutting system in which the cutting knife has an adjustable lifting speed is moved back and forth and in which the lifting speed during the advance of the cutting knife on the web according to the feed speed of the cutting knife and the material or the geometric course of the Cutting path is regulated.

The invention thus provides a method and an arrangement for cutting an overlay made of laminated materials along a path defining the periphery of the pattern piece. One with one along the leading edge The cutting edge provided with the blade extending in a manner generally parallel to the cutting edge and sifting perpendicular to the layer of material by means of a stroke-like operation, e.g. by a regulating motor and a Crank mechanism, moved back and forth. By controlled drive means for mutual displacement of the reciprocating Cutting blade and the layer of fabric, the cutting edge of the blade or the cutter along the cutting path is in cutting Engaging with the material of the fabric layer is advanced at a controlled feed rate. The drive means for Moving the blade also has means for rotating the cutting knife about one in the same sight as that Cutting edge running axis, around the cutting knife in sighting of the front and rear edge with the direction of the Keep the cut aligned along the path. The means for performing the reciprocating motion of the cutting knife are equipped with control means to regulate the lifting speed of the

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when guiding on the cutting path along moving cutting knife tied together. The lifting speed is generally set in such a way that it increases with the increasing feed speeds increases and also decreases with decreasing feed rates. The cutting machine in which the control means are used to regulate the lifting speed becomes more versatile because the full Capacity of the system comes into play and is used. This means that the fabric layer can be crossed very quickly can be performed without the occurrence of the process known as "quilting" and without the one difficult cutting line The blade that is guided along it generates excessive heat and thereby causing a melting between the layers of the fabric layer.

Some exemplary embodiments are shown in the drawings.

Show it:

Fig. 1 is a perspective view of an embodiment of the cutting system according to the invention,

Fig. 2 is a detail in cross section of the cutting system of FIG. 1 along the cutting line, in which the reciprocating cutting blade in cutting engagement with that on a table with pierceable The layer of fabric lying on the bed is shown,

3 shows a detail in plan view of a layer of material and a typical section of the cutting path traversed by the cutting knife,

^L V shows a block diagram of a generally complete cutting system for carrying out the task according to the invention,

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Fig. 5 is a flow chart in the data processor

the logical links contained in Fig. h,

Figure 6 is a schematic diagram of one embodiment according to the invention and

7 is a diagram of a further embodiment according to the invention.

Figures 1 and 2 show the cutting system in general, which is used to carry out the cutting of a layer of material consisting of laminates according to the invention. The plant, which is identified by the reference numeral 10, has a cutting table 12, a cutting tool in the form of a reciprocating cutting knife 1 * l ·, one of an X-carriage 16 and a Y-carriage 18 for moving the cutting knife in the -X- or Y- view over the cutting table 12 existing carriage guide and a control unit 20, which generates control signals for the cut from a cutting program stored on magnetic tape 22. The basic commands on the tape 22 are converted into control signals by the control unit 20. The control signals are fed to the X-carriage 16 via a control cable 2h and distributed to the various components on the carriage 16 and 1o including the drive motor for the cutting knife 1 * t, so that the desired pattern piece is made from a layer of material L lying on the table 12 Laminates is cut to size. The sheet material can be used to make clothes or posters and the like.

The cutting table 12 has a penetrable bed 26, by which the support surface is determined on which the layer material is spread out and laid out as a layer of fabric. This bed 26 can be made of styrofoam blocks or bristle mats,

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into which the cutting knife lh can be guided in and out perpendicular to the support surface and su the layer of laminate spread out thereon, dipping into the penetrable bed around the laminates in the entire depth of the. To cut through the laminate layer, as shown in FIG. 2. The bed 26 can also employ a vacuum system that holds the fabric sheet in place and has multiple channels 30 that extend through the penetrable bed to a vacuum chamber in table frames. A are top or overlay ~ $ h of impermeable material How-a layer of polyethylene is spread over the fabric layer. By sucking in the vacuum through the channels 30 with a pressure lying below the atmosphere is generated on the support surface of the table 12, which in connection with the overlay ^ h keeps the layer of fabric L in a compressed state. la individual id.rd in this regard refer to TJS-PS 3 ^ 95 4-92.

The ¥ agen 16 is used on two gear rods ^ iO, hZ, which extend in the longitudinal direction marked on the edge of the work table 12 as the X-axis. The carriage 16 has an X-drive motor ¥ + which is connected to each gear rod 4θ, k-2 via the gears (not shown) for engagement, so that the X-carriage 16 in the X-direction over the table 1S and can be moved forward. The Υ.-1 / agen 18 is positioned remotely from the carriage 16 via the control rail 50 and the lead screw 52. The rail 50 and the screw 52 extend in parallel alignment between the opposite side ends of the X carriage 16. The Y carriage The drive motor 5 ^ is ^connected to the lead screw 52 and inserted into the carriage 18 via a thread in order to move the carriage 10 in the Y-direction with respect to the X-axis 16 and the table 12. The

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from the displacements of the X and Y carriages 16 and 18, respectively Compound movements resulting parallel to the working surface of bed 26 allow the cutting knife 14 can be guided to any position above the layer of fabric L spread out on the table 12.

The cutter 14 hangs from an adjustable platform 6O carried down from the protruding sin of the Y-post 18. The platform 60 can be grown perpendicular to the work surface be stallt from bed 2o in such a way that the cutting knife is between a raised position lying above the layer of fabric L. and one lowered, in cutting engagement with the sheet of fabric reciprocating and immersed in the bed position, the working position, can be moved back and forth, as shown in FIG. 2. The cutting knife 14 extends from the adjustable platform oO in a generally perpendicular orientation to the work surface and the laminate layer L downwards and is in a lining 62 held, whereby it is rotated relative to the platform 60 about the vertical axis or 0 - axis also perpendicular to the work surface v / can earth. The θ rotations of the chuck 62 and cutting knife 14 are grounded by a 9-drive rotor 64 and a Band carried out with. Pulley öo, the latter denoting Connect the i-iotor 64 to the chuck carrying the cutting knife. This can be done by rotating the cutting knife around the O-axis Move the cutter along the cutting line, with its leading and trailing edge aligned with the cutting line at each Is upright on the track. All drive motors 44, p4 and 64 receive control signals during the cutting process from the control unit 20 to the cutting knife 14 along the desired cutting line in cutting engagement with the Shift laminate layer.

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A variable speed hoist motor 70 is connected to the cutter 14 via a crank or eccentric 71 similar to that described in US Pat. No. 3,477,322 to move the cutter blade back and forth through the laminates and work surface of bed 2.6 to move when. the blade is advanced on the cutting path by the drive motors 44, 5 ¹ +. The control signals for sailing the speed of the lifting motor 70 are also taken from the control unit from a program stored on tape, which will be described in detail below. The lifting movement generated by the cutting knife or the blade 14 by the motor 70 and the transmission is preferably chop-like, the cutting knife being lifted completely out of the fabric layer L during each advancing and retreating sequence. The pusher 72, which can best be seen in FIG. 1, has a central opening 7 through which the cutting knife is moved back and forth. The pusher 72 is also arranged hanging from the adjustable platform Go and slides over the overlay 3 ¹ + that covers the layer of fabric L. The pusher 72 prevents

that the layer material is pulled out with the cutting knife during the upward stroke, which supports the cutting process of the cutting knife. The cutting knife 14 has a sharp cutting edge which extends along the front edge 7G and is advanced on the cutting path following the cutting line program in cutting engagement with the fabric layer. The rear edge Tu of the cutting knife 14 is generally not sharpened, but it can also be sharpened if desired. The lower end of the cutting knife 14 also has two edges, 82, with which the cutting knife can penetrate the layers of fabric during each forward and backward movement when the lifting movement takes place in a chopping manner.

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According to the invention, the during the cutting process Basic commands to be followed, which determine the cutting line, are taken from a tape 22 and from the control unit 20 translated into bending of the cutting knife to be carried out on the programmed cutting line, while the lifting speed of the cutting knife for the purpose of optimization the cutting process is regulated. Eiae optimization will mainly achieved by the fact that the cutting speed with increasing feed speed on the in general rectilinear sections of the cutting path is increased in order to avoid "quilting", and that the lifting speed with increasing 'feed speed on the relatively irregularly designed sections the cutting path is lowered to prevent the material from melting or the cutting knife and the like Material is excessively heated.

A typical part of a programmed cutting path is shown in the top view of the fabric layer L in FIG. 5. Using this top view are the various changes in the feed rate that usually occur during the cutting process, and the Explains the manner in which the lifting speed is controlled according to the invention. The cutter 14 moves up the generally straight section of the cutting path P to the point A au. The cutting knife can go right up to the point A with maximum feed speed of the carriages 16 and without exceeding the restrictions imposed by the nature of the system, e.g. the Acceleration rates assigned to the X, Y and Θ axes, and without impermissible stress on the mechanical drive parts ,, da

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the changes in the control parameters from point to point on the incisor are relatively small. Both scanned cutting systems could use the maximum programmed feed rate by the compared Lifting speed should be limited, which has been reduced to below the maximum available lifting speed in order to avoid excessive Heating the material at slow feed speeds to prevent. According to the invention, the lifting motor 70 is controlled by the storage tape program so that a maximum or at least one of the maximum feed speed adequate or comparable lifting speed is given without a "stepping" occurring, so that the displacement of the cutting knife with each advance and retreat sequence from the leading to the trailing edge of the Does not exceed the measuring width of the cutting knife. However, the displacement carried out per stroke sequence is preferably located slightly below the blade width of the cutting knife. In the case of the high programmed feed rate There is little danger of the back and forth movement of the cutting knife on the path P between the back and forth movement The blade and the layer of material created heat, hot spots and melting between the layers of fabric or across the cutting line.

Because the angle in the cutting path at point A is larger than the predetermined angle, e.g. 30 °, the cutting knife 1 * f cannot be continuously guided around the corner, without exceeding the capacity of the system. Therefore it is necessary to adjust the feed of the cutting knife in the Near point A to stop the blade from stratifying-

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material and rotate the Q-axis to align with the next section AB lying on the path P before the blade is guided on the path P. A method for carrying out such a sequence with automatic lifting of the cutting knife can be found in the US patent application dated September 23, 1971 (No. 18310?) By the same applicant. If the cutting knife is allowed to make high-speed reciprocating movements before it is pulled out of the sheet material, after it is pushed back into it, 3 dsLL, sheet material near point A can melt According to the invention, the programmed lifting speed of the hotor 70 is reduced to such an extent that no excessive heat is generated and the corners can then be cut to size without difficulty.

The programmed feed rate for the relatively short section AB is significantly lower than the maximum because the V / agen 16 and 18 would not have the maximum speed. If, however, the maximum speed on the part of the V / agen 16 and iodine is still sought, this would represent an excessive load and strain on the mechanical parts and the drive motors of the cutting system. IJach of the invention, the basic write commands from the belt 22 a reduced feed rate and, accordingly, elm reduced stroke speed before that are suitable for short displacements of the blade which fall below a predetermined amount. The feed speed and the lifting speed can, for example, be made proportional to the length of the cutting path section AB

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v / earth. When the blade reaches point B, it will lifted out and rotated as at point A, because again the change in direction of the cutting path is too great to just to be carried out by turning the blade within the layer of fabric.

The section with a relatively small radius which, due to the inertia loads and other restrictions of the system, can not be traversed at the maximum ■ feed speed. In addition, the accuracy with which the cutting knife follows a desired cutting line decreases as the system approaches the performance limit, since deviations from the cutting line lead to an unacceptable outer line when moving quickly , which is determined by the stored tape program, is reduced to maintain accurate tracking, while at the same time the lifting speed is reduced so that no melting occurs. When the blade reaches point C, a new command for maximum feed and for a new lifting speed is sensed, so that the blade can then continue at high speed on the almost straight section beyond point C. i ■

From the above description it can be seen that a method of cutting a sheet material Material layer is disclosed here, in which the lifting speed of the cutting knife is regulated in accordance with the feed speed on the cutting path, in turn the Feed rate mainly by the course or

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the outer line of the cutting path is determined. The method can be carried out with arrangements of different embodiments. As previously mentioned, the feed rate and stroke rate commands are recorded separately on the storage tape 22 for processing by the control unit during the cutting operation. A data processing system which can create programs with commands for both the feed rate and the stroke rate is shown in Fig. K.

The cutting program is first created by using a separating cut marker oO or a layout is being prepared that contains the outlines of the pattern pieces as they come from cut out of the layer of fabric. The marker is then fed to a size adjuster or analog-digital converter 82 and the outer lines of the individual sample pieces are then drawn either by hand or by a line follower, see above that the point data forming the outer lines are generated as a sequence of digits that either directly correspond to a Data processor 8A- supplied or recorded on tape that will later be used by the data processor.

The data processor GA- is preferably a memory-programmed one Computer that receives point data and creates the cropping program as a sequence of basic commands issued by the control unit be understood. The basic commands are transmitted from the processor 8A- to the recorder 86, which the commands is stored on an initially empty or unwritten tape 22. The tape is then inserted into the reader's control unit 20 and the basic commands from the tape are converted into control signals that can be used during the cutting operation

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Cutting mechanism 88 transmitted from the drive motor en, the cart, the cutting table and the cutting knife the arrangement marked in Fig. 1 with the reference number 10 ordered.

If the data processor 84 receives the digitized P _u nktdaten that stored in the processor program determines the feed speed and the stroke speeds which are compatible with the cutting mechanism 88, and generates the basic instructions for the empty storage tape. Fig. 5 is a. Flow diagram of a stored program part for generating the feed rate and the lift rate commands. At the input point 90 of the program part, the input data including the digitized point data are received during the creation of a cutting program. The first matter to be determined in the program part relates to the question of whether the cutting knife is in the raised position and out of engagement with the layer of fabric, which is represented by block 92. When the blade is up, a notice for reduced lifting speed is recorded on the empty program tape , as at 3h. A reduced lifting speed of the blade withdrawn from the material layer reduces the wear and tear on the blade and the components carrying it, i.e. during the time in which no productive cutting process is being carried out. The reduced lifting speed is taken from one of several parameter cards 95, which are introduced into the data processor before the processor is put into operation and on which the various information presented, including the re-

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reduced lifting speed when the fabric layer is pulled out Blade, are registered. After block 96, another matter to be clarified relates to from the material situation pulled out blade the question of whether the displacement Δ Ζ, Δ Υ below the predetermined amount of AD., E.g. 2.3 "- cm, which is also taken from a parameter map became. Even if the blade is pulled out of the fabric, it is desirable to adjust the speed of advance or displacement then to bring it below a maximum value or to reduce it if rather short shifts are required, so that the load on the cutting mechanism is reduced. If the shift is more than 2.5 · + cm, no feed command is issued given and the program part then exits via block 93, without a related to the pre-stroke speed Generate basic command. However, if the displacement is less than 2.5 cn, it is the commanded feed rate the amount Λ Χ, Δ Y proportional (block 100), and this part of the program exits via block 102. It is assumed here that the carriages 16 and 18 are moving the blade at maximum feed rate unless a feed rate command is recorded on the tape.

In the case of one lowered IC sling 1 ² F which is in cutting engagement with the fabric layer, a different logic operation is started from block 92. In the Ηϊητ view of the crossing of the cutting blade P in FIG. 5, it was mentioned that several considerations relating to the geometric course of the cutting path are taken into account in influencing the speed of the blade moved along the cutting path. One of these considerations is represented by block 10 ¹ I-. V / enn, as at point A in Fig. Jj, the sighting

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OK

change is above a certain amount A, which was taken from the parameter card, and a lifting of the blade is requested, the feed is stopped and a reduced lifting speed previously recorded on the parameter card put on the program tape in order to keep the lifting speed lower until the corner of the lifting and turning the blade has been cut to the end of the corner machining program part concerned.

The program part for corner machining can also have a Command to resume the feed and lift speeds deliver in order to restore the feed and lift speeds to return to their maximum values, v / if it is assumed that further conditions such as the length of the next leg is compatible with such a command. When the feed is stopped and a command for a reduced Lifting speed is generated at block 10b, this part of the program leaves at block 108.

If there is a change in direction of less than A, v / o, i.e. no lifting and turning of the blade is required, further considerations relating to the feed and lifting speed are examined. In block 110, the question of the length of the subsequent section is considered, ί / eiin this rope section is below the previously selected amount Δ D ₂ , e.g. 2, '5 ¹ V cn, which was taken from the parameter cards, a reduced, Δ X, Δ Y proportional feed and stroke speed to the storage belt and the program part exits via block 11-1, in a very similar way to the program generated above in blocks 100 and 102.

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If it is further assumed that the conditions of blocks 10'l and 110 do not prevail, the question relating to the subsequent section of the cutting path is examined with regard to the restrictions on the part of the equipment, which are also shown in the parameter maps are entered, which is represented by block 116. If, for example, the blade is at point B in the cutting path in FIG. 3, a reduced feed and stroke speed along the section of a relatively small radius of curvature may be necessary in order to maintain accuracy and to remain within the range of the equipment's performance. Both the desired feed rate and the lifting speed are taken from the data previously entered by the data processor via the parameter cards. As in block 11u, before exiting this program part ^ at 120 the corresponding commands for reduced feed and stroke speed are then given. It can be seen that the stroke speeds commanded by blocks 106 and 11 <3 may be the same or different depending on the conditions to be met as the blade is advanced along the cutting path.

If none of the conditions precisely determined by blocks 10k, 110 and 116 are met when the blade is lowered, the program part exits at block 122. If there are no feed or speed commands programmed on the tape, the blade is moved along the cutting path at the maximum feed speed and the corresponding lifting speed.

In this way, the data processor '6k and recorder

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creates a program tape that contains both the advance and stroke speed commands. When the control unit 20 receives the basic instructions from the program tape, ^z by the cutting mechanism 80, the blade 1 'f on the cutting path with varying feed rates and controlled lifting speeds advanced so that an optimum Schneiuevorgang is achieved while maximizing utilization of the hardware without overheating or Melting of the layer material

entry. While changing the feed rate Un the lifting speed is mainly determined by the course of the cutting blade, the lifting speed changes iu generally with the feed rate. With increasing feed speed iiimr.it the lifting speed also to, but not necessarily in the same proportional ^ ratio, as the displacement of the blade not necessarily at all feed rates during an advancing and declining sequence of the blade must remain constant. At the same time, the lifting speed is reduced when the feed speed is reduced XiB in general, although not necessarily in the proportional ratio.

Fig. 6 shows an embodiment of the cutting mechanism, which is designed such that it can be operated via a memory tape that the programmed Contains commands for both the feed rate and the stroke rate, as described with reference to Figures * t and 5.

The control unit 20 is on the drive wheel 130 with the X-carriage, via the drive wheel 1J> 2 with the Y-carriage and via the

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Drive wheel 13 ^ in connection with the motor 1J ^ h in order to transmit movement commands to the blade Ik. The X drive wheel or driver I30 excites the X drive motor kk and similarly the Y drive motor y \ is excited by the driver 132 so that the total movement of the movements generated by the motors kk and 5k in the X and Y axes, the blade 1 *! · can reach any point on the table 12. Similarly, at the same time the driver "]? K energizes the drive motor 6k to rotate the blade and align it in sight of the cutting path when the blade is lowered for cutting engagement with the fabric sheet, if the invention is also received by the control unit 20 Lifting speed commands from the programmed belt and supplies lift driver I36 with lifting speed control signals.

7 shows a modified embodiment of the invention which operates independently of any lifting speed commands on a storage tape or is operated with tapes which do not contain any lifting speed data. In this exemplary embodiment according to the invention, only commands for the X, Y and Q movements are transmitted from the control unit 20 to the respective drivers I30, 132 and 13 ^ -. The driver attract their respective Iiotoren to the desired displacement of the blade "\ k by the fabric layer in the same V / else cause, as is the case with that described with respect to FIG. 6, movement of the blade Vi- In FIG. 7, the information for the feed speed is taken from the X and Y movement commands ^{by an X tachometer 1 2 K) and a Y tachometer 1'Ϊ2.}

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the blade lh is calculated. Former circuit i ¥ t the composite feed rate, a stroke speed signal corresponding to the composite feed rate being given to the driver 136 in order to regulate the stroke speed of Iotor 70. This circuit 1 " ^{I 2} I- can always provide a selected minimum lifting speed, so that the sharp ropes can be cut out, as at A in FIG. 3". The circle .1 ¥ | - can also be adjustable or provided with a lousy program so that the ratio of feed and stroke speed can be changed for cutting different i-i-materials, some of which are more heat-sensitive than others.

Although the invention has been described in several preferred exemplary embodiments, it is, of course, that further changes both iia with regard to the procedural steps as well as with respect to the components of the system can be carried out without therefore the 3aliiaen of the invention to leave. In particular, the size of the lifting speeds can be changed by limited amounts by adding a Elan sequence of the preselected lifting speeds for the various prescrubbing rates and other cutting conditions will. Another possibility is to change the feed rate according to a continuously variable To regulate the plan sequence of the lifting speeds, so that the lifting speed of the blade according to the requirements the cutting path can be continuously adapted and changed. In the exemplary embodiment described, a Hegel motor for the reciprocating blade with one stroke. of fixed $ 5r length used to set the lifting speed to change the blade. However, the idea of discovery also comes

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sur valid if a constant stroke rate is maintained and the Uadius of the crank that generates the lifting movement is changed. Although a motor with adjustable speed the structure of the system is made much simpler and is therefore preferable for reasons of construction a shortened stroke of the blade while maintaining a constant one

Lifting speed also leads to less heat generation between the blade and the sheet material. According to the idea of the invention, a lifting motor can also be used in the cutting system variable speed as well as a variable stroke drive gear can be used. It illuminates from this, that the use of the expression stroke speed not exclusively on the speed of the there and then Iierbe './ egU2g the blade is related, but also the reduced relative affection of the blade and the layer material uafasGt, which is a shortening in the length of the stroke of the blade

Patent claims :

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Claims (1)

-Zk- 2300Λ32 P A T Ξ N T A N S P K U C H 1. A device suitable for cutting laminate fabrics, consisting of sun placing the fabrics on suitable carrier means (12, 26), which represents the work surface for cutting the spread fabrics, and a reciprocating cutting tool (1 * f) with a sharp one a cutting edge extending along an edge side of the blade, characterized by controlled drive means (16, 18, 20) connected to the tool and the support means around the tool and those spread out on the work surface. Shifting laminates against each other with the cutting edge of the blade oriented generally perpendicular to and cutting into engagement with the laminates by reciprocating means (70) associated with the reciprocating cutting tool around the cutting edge of the blade periodically enter and exit the laminates at a controllable speed, while the tool and the laminates are displaced against each other, and by means (20, 136, 1 * tO, IkZ, i ¥ f) for controlling the stroke, the are connected to the lifting movements performing means in order to regulate the variable speed with which the cutting edge periodically enters the laminates and emerges from them. 2. Device according to claim 1, characterized in that means for performing the lifting movements from a motor (70) exist with adjustable speed, which is used to drive the Cutting blade is connected to this and that means 309830/0424 to control the stroke have a motor driver (136) which is connected to the sail motor. 3. Apparatus according to claim 1, characterized in that the lift control means (2Ö, I36) for controlling the variable Speed of the cutting edge this speed as a function of the relative speed of displacement of Control tools and laminates that are generated by the controlled drive means. H. Device according to Claim 1, characterized in that the lifting control means and the controlled drive means have a common program belt (22) which has both feed speed data which determine the speed at which the tool and the laminates are displaced relative to one another and also lifting speed data, which provide increasing lifting speeds with increasing feed speeds. 5. The device according to claim 1, characterized in that the stroke control means (36, 1 ² K), 1 ^ 2, i ¥ l ·) are connected to the controlled drive means (20) in order to receive data that the mutual advance of the Determine the tool and the laminates, and respond to the data in order to generate Hegel signals for the lubricants according to the advance of the tool and the laminates. ΰ. Device according to claim 1, characterized in that the stroke control means have a speed sensor (1 ^ iO, 1 ^ 2) aimed at checking the level signals in accordance with the mutual precondition of './kseug and laminated fabrics . - 26 - 309830/0424 7. Process suitable for cutting laminates, moved back and forth through the cut oyster pieces by guiding a perpendicular to the cutting edge Cutting knife on one of the outer lines of the luster. adjusting path, characterized by mutual shifting the reciprocating cutting blade (1 ^) and the Laminate overlay with controlled feed speeds for guiding the cutting edge (76) along the cutting blade the cutting path (P) in cutting engagement with the fabric support by rotating the reciprocating cutting blade about the axis (9) running in the same direction as the cutting edge, so that the blade is generally aligned with the Cutting direction remains aligned with the cutting path, and by controlling the lifting speed of the reciprocating Cutting blade while walking along the cutting path. 8. The method according to claim 7j, characterized in that during the control process, the lifting speed is regulated as a function of the controlled feed speed. 9. The method according to claim u, characterized in that during the displacement process, the rate of reciprocal displacement of the reciprocating blade and The layer of material is increased and, during the control process, the lifting speed of the reciprocating blade is increased in accordance with the increase in the feed speed increased v / ird. 10. The method according to claim o, characterized in that during the Verscliiebungsvorgang the speed of the mutual Reduced feed of the reciprocating blade and layer of fabric and during the 2egelvorgangs the lifting speed of the forward - 27 - 309830/0424 and moving blade just about the decrease in the feed rate is decreased. 11. The method according to claim 7 _5, characterized in that the stroke length of the reciprocating blade remains constant at each point on the cutting path forming the outer line of the cutting oyster piece. 12. The method according to claim 7, characterized in that In the precedent rule, a planned sequence of preselected, Lifting speeds that are lost in large and unlimited amounts, is determined and the stroke speeds of the reciprocating blade changed by limited amounts so that the previously selected lifting speeds are reached. 13- The method according to claim 7 »characterized in that When sailing, a continuously variable, planned sequence of the lifting speeds is determined and the lifting speed the mn and reciprocating blade is continuously changed, so that the different lifting speeds can be achieved during the cutting process. 14. The method according to any one of the preceding claims 7 to 1j5j, additionally characterized by determining the desired cutting line to be partially cut in the layer material in accordance with the cutting pattern, dm-ch immersion of the cutting edge provided with a cutting edge formed along the cutting edge (1 * 1-) in and through the laminates to be cut in a direction generally perpendicular to them, through controlled mutual displacement of the cutting blade and - 28 - 309830/0424 2300Λ32 the laminates so that the leading edge of the blade is advanced on the desired cutting line by periodic reciprocating movement with respect to the Laminates parallel to the cutting edge with simultaneous feed on the desired cutting line and by control the lifting speed of the cutting blade with simultaneous advance of the cutting edge on the cutting line. 15 · The method according to claim I ¹ I-, characterized by coordinating the lifting speed of the cutting blade with the speed at which the cutting blade on the cutting. line is advanced. 16. The method according to claim 15 »characterized in that the coordination consists in the fact that the lifting speed of the cutting blade increases with increasing feed speed the cutting line increases and the lifting speed of the cutting blade with decreasing feed speed on the Cutting line decreases. 17. The method according to claim 1 ^, characterized in that during the control process, the periodic stroke rate is varied, so that the desired stroke speeds of the cutting edge can be achieved. 18. The method according to claim 17, characterized in that the stroke of the blade is kept constant while the Stroke rate changed. 19. The method according to claim 1 ^, characterized in that the length of the stroke of the blade is changed during the control, so that the desired stroke speeds of the cutting - 29 - 309830/0 4 24 edge can be reached. 20. The method according to claim 1 ^, characterized in that In the control process, the stroke speed of the cutting blade at different points (A, B, C) on the cutting line accordingly the jev / hasty geometric course of the line is regulated * 21. The method according to claim 20, characterized in that the regulation in particular consists in that the lifting speed the blade is reduced when the direction of the cutting line changes. 30983Q / CH24