EP0780200A1 - Dispositif pour la coupe de matériaux plans et souples tels que la peau ou l'étoffe - Google Patents

Dispositif pour la coupe de matériaux plans et souples tels que la peau ou l'étoffe Download PDF

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Publication number
EP0780200A1
EP0780200A1 EP96120687A EP96120687A EP0780200A1 EP 0780200 A1 EP0780200 A1 EP 0780200A1 EP 96120687 A EP96120687 A EP 96120687A EP 96120687 A EP96120687 A EP 96120687A EP 0780200 A1 EP0780200 A1 EP 0780200A1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting device
drive wheels
carriage
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96120687A
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German (de)
English (en)
Other versions
EP0780200B1 (fr
Inventor
Wolfgang Dipl.-Ing. Bruder
Gerd Ing. Küpper (grad.)
Klaus Biervert
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Individual
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Individual
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Publication of EP0780200A1 publication Critical patent/EP0780200A1/fr
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Publication of EP0780200B1 publication Critical patent/EP0780200B1/fr
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Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B5/00—Clicking, perforating, or cutting leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3806—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface
    • B26F1/3813—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work

Definitions

  • the invention relates to a cutting device according to the preamble of claim 1.
  • the cutting device known from DE 41 18 321 C2 has a carriage with a vertical support column on the rear of a cutting table with its drive wheels on horizontal rails, on which a telescopic extension arm is pivotably mounted. At the front free end of the extension arm there is a thrust knife machine which can be placed on the cutting table with a support foot and rotates about a vertical axis and carries a switch for the sliding drive of the carriage.
  • the known cutting device is perceived as quite rigid with regard to its technical structure and its handling for some applications.
  • the invention has for its object to provide a cutting device in which the rigid structurally complex construction can be omitted and which allows a versatile and precise application.
  • This object is achieved in accordance with the characterizing part of claim 1.
  • the invention therefore proposes a remote-controlled carriage which carries the cutting tool and drives directly on the material to be cut.
  • the cutting tool can be formed by a water jet device, a circular or stitch knife, a laser beam, an ultrasonic knife, etc.
  • the proposal according to the invention also provides for the motor vehicle to control the necessary directions of movement of the cutting carriage in the X / Y coordinate system. A necessary tangential control of the cutting edge is to be generated by an axis of rotation in the carriage.
  • the invention also provides for the material to be cut to be fixed on the cutting surface by vacuum, adhesive or friction.
  • the proposal according to the invention is considered advantageous because the portal construction described above can be dispensed with entirely.
  • the carriage has two drive wheels which are aligned or can be aligned parallel to one another and can be driven at adjustable peripheral speeds, at least one support wheel being additionally arranged on the carriage.
  • the invention initially comprises two drive wheels aligned parallel to one another, which can be driven at adjustable peripheral speeds. This means that in order to achieve a straight cut, both drive wheels rotate at the same peripheral speed. In the event that the cutting contour requires a curve, one drive wheel can rotate faster and the other more slowly. To mechanically stabilize the car, it additionally has at least one support wheel. Any cutting contour can therefore be achieved with the cutting carriage according to the invention. In the event that the two drive wheels are aligned in an unchangeable parallel position to each other are, it is appropriate according to an embodiment of the invention that at least one support wheel is freely rotatable and freely steerable.
  • the two drive wheels are aligned parallel to one another and can also be aligned in alternating parallel positions, it may be appropriate to use a rigid, i.e. not steerable to provide a support wheel arranged on the carriage.
  • An embodiment which is particularly preferred by the invention is characterized by the solution according to the invention of claim 10, according to which the carriage has at least three directionally controllable drive wheels which are aligned parallel to one another and can be driven at adjustable peripheral speeds.
  • the embodiment mainly occurring in this context has drive wheels which can each be driven at the same peripheral speed.
  • the cutting carriage according to the invention always assumes a subsequent position parallel to the previous position, irrespective of any point of a cutting contour to be approached.
  • each point of the carriage always travels the same way when the cutting contour is traveled, which considerably facilitates the setting up of the cutting tool and its adjustment.
  • the invention also allows the drive wheels to rotate at different peripheral speeds allow. This gives the invention the possibility of correcting the running of a wagon if, due to slippage, it deviates from the above-described cutting contour due to particularly noticeable discontinuities (for example due to different static friction values), which occur particularly in leather skins.
  • the drive wheels are coupled with respect to their directional control in a motion-uniform manner, so that a once-set parallel position of the drive wheels to one another is ensured at every steering position.
  • the drive wheels for carrying out the steering movement are expediently mounted on control shafts.
  • the invention provides for the movement-uniform coupling to be implemented with respect to the directional control of the drive wheels via transmission means.
  • a related embodiment can consist in that each control shaft carries a pinion and that all pinions of the control shafts are positively coupled to one another via a continuously endlessly guided gear element, such as a drive chain or toothed belt.
  • a common control motor is incorporated into the transmission means.
  • a common control motor can a further embodiment of the invention can be an incrementally drivable stepper motor or a servo motor.
  • Another embodiment according to the invention provides that the unitary clutch with respect to the directional control of the drive wheels via a drive energy medium, e.g. electrical, done.
  • a drive energy medium e.g. electrical
  • the invention also allows other drive energy media, such as e.g. a pressure fluid to apply.
  • the invention is also generally not limited to electric stepper motors or electric servomotors.
  • hydraulic or compressed air motors can also be used instead of such electric motors.
  • each control shaft In connection with a uniform movement coupling of the directional control of the drive wheels via a drive energy medium, it has proven to be expedient for each control shaft to be provided with its own incrementally stepper motor which can be driven by a step pulse or with a servo motor, and for all of these motors to be controlled by a common signal transmitter.
  • Cutting tools which act on the material to be cut essentially in a line, such as, for example, driven or non-driven circular knives, must be adapted to the constantly changing course of the cutting contour, that is to say guided and oriented accordingly.
  • the invention now links the directional control of the cutting tool with the directional control of the drive wheels in that the directional control of the cutting tool is also incorporated into the directional control of the drive wheels.
  • the drive wheels are driven in such a way that each drive wheel can be driven via its own stepper motor, which can be controlled incrementally via step pulses, or via a servomotor.
  • the stepper or servo motors of the drive wheels can be controlled either via a common signal transmitter or in each case via separate signal transmitters. Separate signal generators will be useful if e.g. Different circumferential speeds on the drive wheels are required for the above-described application of correcting the direction of the cutting carriage.
  • the invention provides that the drive for the directional control of the drive wheels and the drive of the drive wheels are reversible.
  • a leather skin 11 is spread out flat on a cutting table 10, the flat cutting surface of which is designated E, and is temporarily fixed via openings (not shown).
  • Fig. 1 shows a so-called “nesting”, according to which the contours of three blanks within the outer contour A of the dermis 11 are made visible. These blanks placed or nested in this way are displayed on the skin 11, for example, via the optics 12 of a laser 13 (cf. FIG. 6).
  • the particular problem with nesting leather is that leather is a natural product and therefore each fur must be nested individually according to the shape and size and according to the natural defects in the fur. It may be the case that surface defects of the dermis 11 shown in FIG. 1 only allow the three blanks initially placed by nesting, that is to say no further blanks.
  • a cutting tool (not shown) (e.g. water jet device, edge or stitch knife, laser beam, ultrasonic knife etc.) is taken along straight partial contour lines K1, K2, K3 and K4 from points p1 via points p2, p3 and p4 back to Point p1 led, with which the blank 14 would be completed.
  • the outer contour A of the dermis 11 is not shown in FIG. 2.
  • the guidance of a cutting tool shown schematically in FIG. 2 can proceed according to FIG. 3 via a remote control as follows:
  • the remote control of the cutting tool, not shown in FIG. 3, along the contour K, starting from point p1, via the points p2, p3, p4 back to the point p1 are done in the broadest sense on the basis of polar coordinates.
  • a device N known per se, is arranged on a corner of the cutting table 10 and contains a length measuring device for a rope to be wound and unwound, and an angle measuring device for the different angular positions of the tight rope.
  • the different rope lengths are denoted by S1-S4 and the corresponding angles by ⁇ 1- ⁇ 4.
  • the cutting carriage 15 has the following details for its drive control:
  • Each Control shaft 17 has at its lower free end an approximately fork-shaped bearing bracket 18, which in each case supports a drive wheel 20 provided with a tread 21 by means of a bearing shaft 19.
  • Each drive wheel 20 can be driven in rotation by an electric servo motor 22 or by an electric stepper motor.
  • Each control shaft 17 is in a manner not shown in the bearings 23 of the chassis 16 rotatably axially.
  • a toothed pulley 25 is non-rotatably, which is in engagement with a toothed belt 26 which is endlessly guided all round.
  • the toothed belt 26 is also in engagement with a toothed pulley 27 on the upper free end region 28 of a cutting tool control shaft 29 which is axially immovably pivoted at the bearing point 30 in the chassis 16.
  • the cutting tool control shaft 29 carries an approximately fork-shaped bearing bracket 31, which receives a bearing shaft 32 for a cutting wheel 36, which is driven in rotation by means of an electric motor 33.
  • a control motor 34 specifically an electrical servomotor or an electrical stepping motor, is flanged.
  • deflection rollers 35 are also arranged adjacent to the toothed pulley 27 for the cutting tool control shaft 29.
  • the cutting carriage 15 works as follows:
  • the cutting wheel 36 is located at the point p2, that is to say the cutting carriage 15 is on its way from the point p2 to the point p3.
  • the cutting wheel 36 rotates and thus cuts the dermis 11 along the partial contour K2, while the drive wheels 20 driving the cutting carriage 15 forward, that is to say synchronously driven by the servomotors 22, rotate.
  • a steering correction takes place to the required extent via the servo motor 34, which controls all the control shafts 17 for the drive wheels 20 and also the cutting tool control shaft 29 drives incrementally in one or the other direction of rotation via the toothed belt 26.
  • the drive wheels 20 and the cutting wheel 36 are always aligned parallel to one another regardless of the respective angular position of the control shafts 17 and 29.
  • the signal to the servomotor 34 for the course correction is transmitted to the servomotor 34, starting from a computer (not shown), via a combined feed and control cable 37 (cf. FIG. 6).
  • the servomotors 22 and the drive motor 33 are also fed in electrically via the cable 27.
  • a marking stamp 38 to be actuated at intervals which can be actuated by means of an air cylinder 39, can also be provided as a track specification for a subsequent sewing process.
  • FIGS. 6 and 7 another type of remote control for the cutting carriage 15 is shown in FIGS. 6 and 7.
  • the laser 13 attached to a ceiling structure 40 which is already present for the already described nesting of the leather skin 11, also takes over the control of the cutting carriage 15 in accordance with the previously calculated cutting contour data for the leather cuts, e.g. also for leather cutting 14.
  • the optics 12 of the laser 13 emits a laser beam L, which strikes a light-sensitive cell, namely a CCD camera array 41 with 0-512 pixels x / y. If the laser beam L changes, As shown in Fig. 7, its position, this change in position is detected by the camera array 41 and passed on in the form of control data via a computer and via the combined cable 37 to the servo motor 34 of the cutting carriage 15 that the latter exactly the laser beam follows by placing the crosshair Z in register with the laser beam L.
  • the cutting tool control shaft 29 consists of two separate axial regions 29A and 29B, which are connected to one another in a rotationally fixed manner by means of a lifting device 42.
  • the opposite ends of the axial regions 29A, 29B carry flanges 43 and 44.
  • Actuators, e.g. Air cylinder 45, the axially movable elements such as Piston rods 46 are attached on the upper side to the lower flange 44. By actuating these actuators, the cutting tool control shaft 29 can therefore be axially shortened if the cutting tool 36 is to be raised in order to carry out an empty travel of the cutting carriage 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Control Of Cutting Processes (AREA)
  • Treatment Of Fiber Materials (AREA)
EP96120687A 1995-12-22 1996-12-20 Dispositif pour la coupe de matériaux plans et souples tels que la peau ou l'étoffe Expired - Lifetime EP0780200B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19548304A DE19548304C2 (de) 1995-12-22 1995-12-22 Schneidvorrichtung für flächige, biegeschlaffe Gebilde, wie z. B. für Lederhäute oder Textilbahnen
DE19548304 1995-12-22

Publications (2)

Publication Number Publication Date
EP0780200A1 true EP0780200A1 (fr) 1997-06-25
EP0780200B1 EP0780200B1 (fr) 2001-02-28

Family

ID=7781131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96120687A Expired - Lifetime EP0780200B1 (fr) 1995-12-22 1996-12-20 Dispositif pour la coupe de matériaux plans et souples tels que la peau ou l'étoffe

Country Status (2)

Country Link
EP (1) EP0780200B1 (fr)
DE (2) DE19548304C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103132233A (zh) * 2013-02-21 2013-06-05 湖北工业大学 一种用于开幅机的自动视觉对线开幅方法
CN101745745B (zh) * 2009-12-18 2013-10-16 深圳超多维光电子有限公司 光栅切割装置及其切割方法
CN105946015A (zh) * 2016-06-25 2016-09-21 苏州杰力澳自动化设备有限公司 一种全自动曲线分板机
CN110355041A (zh) * 2019-06-22 2019-10-22 江苏鹏翔新材料科技股份有限公司 一种织布封边卷绕机构

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4010346A (en) * 1975-04-14 1977-03-01 Cecil Equipment Co., Inc. Self-propelled tractor for welding and cutting apparatus and the like
EP0111577A1 (fr) * 1982-12-16 1984-06-27 Koei Seiki Kabushiki Kaisha Machine automoteur d'oxycoupage pour coupe en chanfrein
JPS59189075A (ja) * 1983-04-11 1984-10-26 Koike Sanso Kogyo Co Ltd 自動走行台車
US4573548A (en) * 1983-07-23 1986-03-04 Cybermation, Inc. Mobile base for robots and the like
WO1988001556A1 (fr) * 1986-08-27 1988-03-10 Fortron Automotive Treatments Pty. Ltd. Organe de decoupage
DE4118321C2 (fr) 1991-06-04 1993-06-03 Bullmer Spezialmaschinen Gmbh, 7421 Mehrstetten, De
DE9401188U1 (de) * 1994-01-25 1994-04-14 Bauer, Roland, 90403 Nürnberg CAD-gestütze Zuschneide-Einrichtung mit digitaler Maßdatenerfassung
WO1994017683A1 (fr) * 1993-02-08 1994-08-18 Lectra Systemes Procede de decoupe automatique d'une matiere souple en feuille

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HUT74049A (en) * 1994-04-23 1996-10-28 Stahl Method for treating of technical textile material and leather and apparatous thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4010346A (en) * 1975-04-14 1977-03-01 Cecil Equipment Co., Inc. Self-propelled tractor for welding and cutting apparatus and the like
EP0111577A1 (fr) * 1982-12-16 1984-06-27 Koei Seiki Kabushiki Kaisha Machine automoteur d'oxycoupage pour coupe en chanfrein
JPS59189075A (ja) * 1983-04-11 1984-10-26 Koike Sanso Kogyo Co Ltd 自動走行台車
US4573548A (en) * 1983-07-23 1986-03-04 Cybermation, Inc. Mobile base for robots and the like
WO1988001556A1 (fr) * 1986-08-27 1988-03-10 Fortron Automotive Treatments Pty. Ltd. Organe de decoupage
DE4118321C2 (fr) 1991-06-04 1993-06-03 Bullmer Spezialmaschinen Gmbh, 7421 Mehrstetten, De
WO1994017683A1 (fr) * 1993-02-08 1994-08-18 Lectra Systemes Procede de decoupe automatique d'une matiere souple en feuille
DE9401188U1 (de) * 1994-01-25 1994-04-14 Bauer, Roland, 90403 Nürnberg CAD-gestütze Zuschneide-Einrichtung mit digitaler Maßdatenerfassung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 55 (M - 326) 9 March 1985 (1985-03-09) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101745745B (zh) * 2009-12-18 2013-10-16 深圳超多维光电子有限公司 光栅切割装置及其切割方法
CN103132233A (zh) * 2013-02-21 2013-06-05 湖北工业大学 一种用于开幅机的自动视觉对线开幅方法
CN103132233B (zh) * 2013-02-21 2014-08-06 湖北工业大学 一种用于开幅机的自动视觉对线开幅方法
CN105946015A (zh) * 2016-06-25 2016-09-21 苏州杰力澳自动化设备有限公司 一种全自动曲线分板机
CN110355041A (zh) * 2019-06-22 2019-10-22 江苏鹏翔新材料科技股份有限公司 一种织布封边卷绕机构

Also Published As

Publication number Publication date
DE19548304A1 (de) 1997-06-26
DE59606500D1 (de) 2001-04-05
EP0780200B1 (fr) 2001-02-28
DE19548304C2 (de) 1997-09-25

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