EP0479978A1 - Procede de decoupage d'une piece - Google Patents

Procede de decoupage d'une piece

Info

Publication number
EP0479978A1
EP0479978A1 EP19910907447 EP91907447A EP0479978A1 EP 0479978 A1 EP0479978 A1 EP 0479978A1 EP 19910907447 EP19910907447 EP 19910907447 EP 91907447 A EP91907447 A EP 91907447A EP 0479978 A1 EP0479978 A1 EP 0479978A1
Authority
EP
European Patent Office
Prior art keywords
cutting
outer contour
reference point
blank
cut
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.)
Withdrawn
Application number
EP19910907447
Other languages
German (de)
English (en)
Inventor
Winfried Buchmann
Bodo Deutschmann
Thomas Heinrichs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Krauss und Reichert GmbH and Co KG
Original Assignee
Krauss und Reichert GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Krauss und Reichert GmbH and Co KG filed Critical Krauss und Reichert GmbH and Co KG
Publication of EP0479978A1 publication Critical patent/EP0479978A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/005—Computer numerical control means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D2005/002—Performing a pattern matching operation

Definitions

  • the invention relates to a method for cutting out a blank from a web of material having a pattern repeat by means of an outer contour of a multiplicity of control computer storing a plurality of blank parts and a cutting unit controlled thereby.
  • a material web with a pattern repeat is understood to mean, for example, a patterned fabric web, the pattern of the fabric web being repeated in different directions after certain distances. The distance at which the pattern repeats is called the pattern repeat.
  • cut out cut parts which are elements of an optimized cut pattern, from a material web having such a pattern repeat, the cut parts being arranged in the sectional pattern in accordance with the pattern repeat.
  • the individual cut parts are each made in the same way, so that it ultimately has no effect on the cut parts, which - since they are arranged taking the pattern repeat into account in the sectional view - always fit together.
  • the invention is therefore based on the object of improving a method of the generic type in such a way that it is possible to cut out a selected blank in a repeatable manner.
  • This object is achieved according to the invention in that a single cut-out part to be cut is selected, the desired repeat-related position of the outer contour of the selected cut-out egg is detected, that the outer contour of the selected cut-out egg is positioned in a predetermined cutting area in such a way that the outer contours of the A large number of stored cut parts can be individually stored so that the individually stored outer contour of the selected cutting egg is assigned a reference point that absolutely defines the position of the outer contour relative to the material web, so that the reference point is determined for the outer contour positioned precisely in the cutting area is that the reference point is transmitted to the control computer and that the stored outer contour of the cutting egg is positioned with the reference point relative to the material web with the control computer using the reference point and the cut part is cut out by appropriate control of the cutting unit.
  • the selected cut part is a cut part of a sectional image to be re-cut.
  • Such re-cutting of a blank is particularly necessary if the selected blank is a faulty blank of a sectional image, this sectional image usually having a large number of blank parts arranged in a cutting-optimized position relative to one another.
  • the method according to the invention is preferably carried out in such a way that the selected blank is cut out of a re-cutting area.
  • a re-cutting area of the material web is provided after the cutting out of one or more sectional images from a material web in order to take all of the cases into account to be able to cut in which defective cut parts that cannot be used and which require re-cutting.
  • the repeatable positioning of the outer contour of the selected blank egg can also be carried out using a template in which, for example, the repeatable position of the faulty blank egg was noted.
  • a precisely cut - possibly faulty - cut part is placed on the material web in the cutting area.
  • the cut-out and possibly faulty blank thus serves on the one hand as evidence to detect the exact position of the repeat and also as a means of being able to carry out the exact positioning of the outer contour of this blank in the predetermined cutting area .
  • the reference point of a cutting egg is determined in relation to features of the outer contour thereof. For example, it is conceivable to use a characteristic corner point of the outer contour as a reference point. In addition to the feature described above, this can then be the coordinate zero point, but it can also be any coordinate point for the coordinates of the outer contour, so that the control computer then opens must calculate back the coordinate zero point and can then calculate the remaining coordinates of the outer contour.
  • the reference point is defined by the intersection of two reference lines tangential to the outer contour perpendicular to two different directions without intersections. This possibility of determining the reference point makes it possible, on the one hand, to select the reference point as the coordinate zero point for the outer contour and, on the other hand, for an operator in all possible types of outer contours, without these having characteristic shape features, for example, to determine the reference point.
  • the reference lines enclose a fixed angle, preferably an angle of 90 °, with one another.
  • the procedure is such that the reference straight lines run parallel to the X and Y directions of the coordinate system of the control computer and thus also to the X and Y coordinates of the material web.
  • the reference straight line can be recorded manually, but it is particularly advantageous if the position of the reference straight line is automatically recorded by the computer.
  • reference straight lines are formed by reference lines visible on the material web.
  • the reference lines can be formed, for example, by rulers.
  • the method according to the invention can be handled particularly easily if visible light strips are used as reference lines.
  • the object according to the invention is also achieved in a device for cutting out a cutting egg from a material web having a pattern repeat, comprising a control computer in which an outer contour of the cutting egg is stored and a control computer which can be controlled by the control computer in accordance with the outer contour of the cutting egg Cutting unit, according to the invention solved in that the control computer is designed such that the outer contour of the cutting egg can be called up individually from a plurality of stored outer contours, that the individually called outer contour is assigned a reference point by which the position of the outer contour relative to the material web is absolutely defined It is bar that the device has an input unit with which the reference point of an outer contour of the selected cutting piece positioned precisely in the repeat in the predetermined cutting area can be detected and the control ⁇ computer can be transmitted, and that the control computer controls the cutting unit after transmitting the reference point for cutting-accurate cutting of the outer contour of the blank.
  • a particularly expedient embodiment of this device provides that the reference point can be determined with the input unit on the basis of the position of the outer contour that is precisely positioned on the material web.
  • the device is advantageously constructed in such a way that two reference lines can be slidably positioned on the material web with the input unit.
  • a particularly advantageous embodiment provides that the input unit has a projection device for generating light strips as reference lines on the material web.
  • the projection devices can be designed in a wide variety of ways. In the simplest case it is provided that the projection devices have a projection laser.
  • the input unit can in turn be displaceable in a wide variety of ways relative to the material web.
  • One exemplary embodiment provides that the input unit can be moved manually.
  • a manual control unit is provided for shifting the reference lines.
  • 1 shows a side view of a device according to the invention
  • 2 shows a plan view of the device according to the invention
  • FIG. 3 shows a schematic illustration of the method according to the invention with the aid of the device according to the invention
  • FIG. 4 shows a schematic representation of a variant of the method according to the invention with the aid of the device according to the invention.
  • An exemplary embodiment of a device according to the invention comprises a cutting 10, over which a cutting unit, designated as a whole by 12, can be moved.
  • the cutting unit 12 is slidably mounted on a guide rail 14, for example below the cutting table 10 and parallel to it, with a guide part 16 of a bridge 18, which extends, for example, in a U-shaped manner over the cutting table 10.
  • a guide track 20 which extends across the cutting table 10 and on which the cutting unit 10 can be displaced across the cutting table 10 by means of a carriage 22.
  • a displacement of the cutting unit 12 by means of the carriage 22 along the guideway 20 across the cutting table 10 is referred to as a displacement of the cutting unit 12 in the Y direction
  • a displacement of the cutting unit 12 together with the bridge 18 and the guide part 16, held by the guide rail 14, in the longitudinal direction of the cutting table 10 is referred to as a displacement in the X direction.
  • the cutting unit 12 is displaced in the Y and X directions preferably by means of a motor drive, for this purpose the cutting unit 12 with a motor 24 for displacing it in the Y direction and the guide part 16 with a motor 26 for displacing the same is provided in the X direction.
  • the cutting unit 12 is also provided with a Y-displacement sensor 28 and the guide part 16 with an X-displacement sensor 30, both of which are connected to a control computer 32, which in turn controls the motors 24 and 26.
  • the cutting unit 12 can be moved on the cutting table in a CNC-controlled manner by the control computer 32.
  • the cutting unit 12 is provided with a cutting knife 36 for cutting a material web 34 lying on the cutting table 10, which can preferably be moved up and down by the cutting unit 12 perpendicular to a plane 38 of the cutting table 10.
  • the cutting table is provided with a layer 40 of bristles standing perpendicular to the plane 38, which is able to support the material web 34, but which allows the cutting knife 36 to penetrate in an oscillating manner.
  • the bridge 18 of the device according to the invention is provided, for example, with a guideway 42 opposite the guideway 20 for an input unit denoted as a whole by 44.
  • This input unit 44 is in turn also displaceable in the Y direction across the cutting table 16 by a motor 46 and is provided with a Y displacement sensor 48.
  • the input unit 44 can thus be displaced in a controlled manner in the Y direction by means of the control computer 32 and can be moved in the X direction simultaneously with the cutting unit and the motor 26 provided for this purpose using the X displacement sensor 30.
  • the input unit 44 comprises a Y projection unit 50 and an X projection unit 52, with the Y projection unit 50 a Y light strip extending parallel to the Y direction being projectable onto the material web and with the X projection unit 52 a parallel X-light stripe 56 running to the X-direction.
  • both the Y-light stripe 54 and the X-light stripe 56 are thus positioned anywhere in the Y and X directions on the Cutting table 10 slidable.
  • a manual control unit 60 that can be operated by an operator is preferred for positioning the Y light strip 54 and the X light strip 56 provided, which is either - as shown in FIG. 1 - arranged on the control computer 32 or preferably alternatively or additionally - as shown in FIG. 2 - arranged on the bridge 18.
  • FIGS. 1 and 2 can be used, for example, to carry out an exemplary embodiment of a method according to the invention which is shown in FIG. 3.
  • This exemplary embodiment is a method for re-cutting cut parts of a sectional image which, for example, are faulty.
  • a sectional image, which is preferably put together in an optimized form in order to allow the totality of the individual blank parts to be cut as economically as possible, is designated as a whole in FIG. 3 by 70.
  • This sectional image 70 comprises the cut parts A, B, C. D, E, F and G, all of which are to be cut out by the cutting unit 12.
  • the material web 34 placed on the cutting table 10 comprises a pattern represented by the rectangles 72, which is repeated after a distance R. This distance R is referred to as a pattern repeat.
  • the pattern 72 has both a pattern repeat RX in the X direction and a pattern repeat RY in the Y direction.
  • the sectional image 70 is stored in the control computer 32.
  • the sectional image 70 is so aligned relative to the pattern 72 that an accurate relative There is a correlation of the individual cut parts A to G with the pattern 72, it being assumed when creating the sectional image 70 that the pattern repeat R is constant in every direction.
  • the sectional image 70 can be positioned exactly relative to the pattern 72, for which purpose a coordinate zero point specified by the sectional image 70 must be arranged in exact relation to the pattern 72. This is preferably done by taking the dimensions for the coordinate zero point from the sectional image 70 and determining the coordinate zero point relative to the pattern 72 by measuring, for example by hand. This measured coordinate zero point is then approached by the cutting unit 12 or the intersecting X and Y light strips 54, 56 and thus transmitted to the control computer 32.
  • the control computer 32 After the alignment of the sectional image 70 relative to the pattern 72, the control computer 32 is able to move the cutting unit 12 with the cutting knife 36 along the outer contours 74 of the blank parts A to G, the blank parts A to G being cut out. If, after cutting out or cutting out the cut parts A to G, it turns out that, for example, the cut part D has an error 76, for example a weaving error or a color error, then this cut part cannot be used. but must be cut.
  • an error 76 for example a weaving error or a color error
  • the faulty blank parts are identified, for example, by an operator while cutting blank parts A to G.
  • the operator can mark these faulty blank parts by holding a part number of the same which is assigned or assigned to them in the cross-sectional image becomes.
  • the material web 34 is designed such that a re-cutting area 78 adjoins the sectional image 70, in which no cut parts of the sectional image 70 lie.
  • the cutting part D must now be repositioned in this re-cutting area 78.
  • an operator takes the cut-out part D with the error 76 and places it in the recutting area 78 in a repeatable manner, and when cutting several cut-out parts, several cut-out parts are also optimally designed in the recutting area 78 in a repeatable manner.
  • each of the blank parts A to G is stored in the control computer 32 so that it can be called up individually, for example identified by the part number, and that its outer contour 74 is clearly relative by a reference point 80 can be clearly positioned relative to the material web 34, so that when the position of the reference point 80 is transmitted, the control computer 32 is able to control the cutting knife 36 of the cutting unit 12 in a repeatable manner for re-cutting the respective cut part.
  • the reference point 80 is defined in such a way that it is the crossing point of a tangent 82 of the outer contour 74 which is not intersecting as the outer contour 74 and which is parallel to the X direction and tangent 84 of the outer contour 74 which is parallel to the Y direction.
  • the tangent 82 parallel to the X direction and the tangent 84 parallel to the Y direction on the outer contour 74 of the cut-out cutting piece D, which has been cut out and laid down precisely, must therefore be determined.
  • the tangents 82 and 84 are determined by shifting the X light strip 56 and the Y light strip 54 in the plane 38 on the material web 34 such that the X light strip 56 forms the tangent 82 and the Y light strip 54 the tangent 84.
  • control computer 32 By detecting the position of the X light strip 56 and the Y light strip 54, the control computer 32 is now able to determine the exact position of the reference point 80 to be calculated and to control the cutting unit with these coordinates of the reference point 80 so that the cutting knife 36 again precisely cuts the outer contour 74 of the cutting egg D from the material web 34 in the re-cutting area 78.
  • the reference point 80 ' is not determined according to a general scheme for each of the cut parts A to G by the tangents, but the procedure is such that each of the cut parts A to G carries the respective reference point 80 'at a characteristic and easily definable point.
  • this is the lower, tapering region of the outer contour 74.
  • the reference point 80 'could also be the tapered region of the outer contour 74, whereas in the case of the cut part A, the reference point 80' is defined in the lower left corner , ie the respective reference point 80 'is individually assigned to each outer contour 74.
  • the same device is used as in the first described embodiment, so that the same reference numerals are used and reference can be made to the explanations for the first embodiment.
  • the variant of the method according to the invention is identical to the exemplary embodiment described first in that the cut-out part D, which has the error 76, is removed after the cut-out and is laid out again in the recutting area 78 on the material web 34 in a repeatable manner.
  • the light strips 52 and 54 are not applied as tangents to the outer contour 74, but are projected as a cross onto the material web 34, this cross being displaced such that the light strips 52 and 54 are located in the reference point 80 'of the blank D cut.
  • the control computer 32 is thus also able to determine the reference point 80 'of the cutting part D and, starting from this reference point, control the cutting unit 12 and the cutting knife 36 in the same way as in the first exemplary embodiment in such a way that the cutting part D in the re-cutting area 78 is accurate to the pattern is cut out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

Pour améliorer un procédé de découpage d'une pièce (A-G) dans une nappe de tissu (34) présentant un rapport de dessin (R) de manière qu'une coupe au rapport d'une pièce sélectionnée soit possible, il est proposé qu'on sélectionne une seule pièce à découper et qu'on détermine sa position en fonction du rapport, que le contour extérieur (74) de la pièce sélectionnée soit positionné en fonction du rapport dans une zone de coupe déterminée, qu'on affecte au contour extérieur, mis en mémoire et adressable individuellement, de la pièce sélectionnée un point de référence (80) définissant totalement la position du contour extérieur par rapport à la nappe de tissu, qu'on calcule le point de référence au niveau du contour extérieur positionné dans la zone de coupe en tenant compte de la répétition du motif, que le point de référence soit communiqué à l'ordinateur de commande (32) et que, dans l'ordinateur de commande, le contour extérieur de la pièce, ainsi mis en mémoire, soit positionné par rapport à la nappe de tissu, au moyen du point de référence, en tenant compte de la répétition du motif, et que la pièce soit découpée au moyen d'une commande appropriée de la coupeuse (12).
EP19910907447 1990-04-30 1991-04-11 Procede de decoupage d'une piece Withdrawn EP0479978A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4013836 1990-04-30
DE19904013836 DE4013836A1 (de) 1990-04-30 1990-04-30 Verfahren zum ausschneiden eines zuschnitteils

Publications (1)

Publication Number Publication Date
EP0479978A1 true EP0479978A1 (fr) 1992-04-15

Family

ID=6405426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910907447 Withdrawn EP0479978A1 (fr) 1990-04-30 1991-04-11 Procede de decoupage d'une piece

Country Status (4)

Country Link
EP (1) EP0479978A1 (fr)
JP (1) JPH04506775A (fr)
DE (1) DE4013836A1 (fr)
WO (1) WO1991017028A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103204407A (zh) * 2013-03-14 2013-07-17 苏州吉视电子科技有限公司 一种采用机器视觉技术的地毯自动切割装置和方法

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333111A (en) * 1991-05-02 1994-07-26 Gerber Garment Technology, Inc. Garment cutting system having computer assisted pattern alignment
US5341305A (en) * 1991-05-02 1994-08-23 Gerber Garment Technology, Inc. A computerized pattern development system capable of direct designer input
DE4216566C2 (de) * 1992-05-20 1997-04-03 Krauss & Reichert Maschf Schneideinrichtung
US5831857A (en) * 1995-09-08 1998-11-03 Gerber Garment Technology, Inc. Pattern alignment and cutting system
US5727433A (en) * 1995-09-08 1998-03-17 Gerber Garment Technology, Inc. Method for cutting sheet material
EP1157793A1 (fr) * 2000-05-26 2001-11-28 Thea Felber Procédé ainsi que dispositif pour ajuster un placement sur la surface d'un matériau
DE102008058561A1 (de) * 2008-11-21 2010-05-27 Caroline Glasow Verfahren zur Herstellung von zwei oder mehr Schnittteilen
DE102014017501A1 (de) * 2014-11-27 2016-06-02 Gunnar Held Verfahren zum Ausschneiden von Gegenständen aus einer zumindest teilweise zweilagigen Materialbahn mittels einer Schneidvorrichtung
CN104738861B (zh) * 2015-03-27 2017-03-22 上海和鹰机电科技股份有限公司 面料的排版与裁剪系统
DE102016208981B4 (de) * 2016-05-24 2019-04-18 Autoliv Development Ab Verfahren zur Herstellung von Gassäcken
US11400614B2 (en) * 2017-04-05 2022-08-02 Zünd Systemtechnik Ag Cutting machine with overview camera

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ES8601751A1 (es) * 1985-02-01 1985-11-16 Investronica Sa Metodo de casado y corte de materiales laminares con dibujo
DE3544251A1 (de) * 1985-12-14 1987-06-19 Duerkopp System Technik Gmbh Verfahren und vorrichtung zum selbsttaetigen zuschneiden von teilen aus flaechigem naehgut nach mit unterschiedlichen konturen versehenen mustervorlagen auf einer koordinaten-schneidmaschine
ES8801003A1 (es) * 1986-04-02 1987-12-16 Investronica Sa Procedimiento de casado de piezas para corte automatico de tejidos con dibujo.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103204407A (zh) * 2013-03-14 2013-07-17 苏州吉视电子科技有限公司 一种采用机器视觉技术的地毯自动切割装置和方法
CN103204407B (zh) * 2013-03-14 2016-06-15 苏州巨佳电子科技有限公司 一种采用机器视觉技术的地毯自动切割装置和方法

Also Published As

Publication number Publication date
WO1991017028A1 (fr) 1991-11-14
JPH04506775A (ja) 1992-11-26
DE4013836A1 (de) 1991-10-31

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