WO1984003647A1 - Procede de fabrication de pieces decoupees avec economie de materiau - Google Patents

Procede de fabrication de pieces decoupees avec economie de materiau Download PDF

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Publication number
WO1984003647A1
WO1984003647A1 PCT/CH1984/000041 CH8400041W WO8403647A1 WO 1984003647 A1 WO1984003647 A1 WO 1984003647A1 CH 8400041 W CH8400041 W CH 8400041W WO 8403647 A1 WO8403647 A1 WO 8403647A1
Authority
WO
WIPO (PCT)
Prior art keywords
stamped
parts
punched
stamped parts
processing step
Prior art date
Application number
PCT/CH1984/000041
Other languages
German (de)
English (en)
Inventor
Rudolf Styner
Original Assignee
Styner & Bienz Ag
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 Styner & Bienz Ag filed Critical Styner & Bienz Ag
Publication of WO1984003647A1 publication Critical patent/WO1984003647A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/06—Making more than one part out of the same blank; Scrapless working

Definitions

  • the invention relates to a method according to the
  • stamping processes a plurality of stamped parts are often produced simultaneously from a starting material in the form of a sheet or a strip by a single stamping process using a multiple tool.
  • the individual stamped parts are removed from the plane of the original starting material immediately after the stamping process or fall down from the plane mentioned due to gravity.
  • the waste remaining in the plane of the original starting material has to be discharged as an unstable perforated plate, which is particularly difficult with high-speed machines.
  • it is in any case necessary to keep the minimum width of the webs remaining between adjacent punched-out openings in the order of 2 to 3 material thicknesses or at least 1 mm. As a result, the raw material is used poorly.
  • the aim of the entire invention is to save material compared to the conventional methods for obtaining flat round blanks from flat material for container manufacture without problems with the removal of the waste or with the quality of the round blanks.
  • the solution is described in the characterizing part of claim 1. Since material triangles are punched out in the first step to form part contours of the round blanks, in the second step all that remains is to cut the bridges between adjacent parts. The transport between the two steps is ensured by all material remaining quasi rigidly connected via the bridges. The openings punched out in the first step serve as transport and positioning aids.
  • the tools for punching out the triangles are preferably designed with rounded "corners", the radius of which may correspond, for example, to approximately half the material thickness and preferably between see 0.15 and 1 mm.
  • the material bridges thus have rounded free sides of a certain width at their ends, which permits subsequent clean punching or cutting through these bridges with the accuracy to be expected for punching tools.
  • the material saving is particularly important in an application where, in the first step, triangles are punched out, which define circular parts with overlapping contour lines, whereupon the bridges between adjacent parts are cut through. Then, with optimal use of the material, slightly out-of-round blanks are formed, but this does not have a disadvantageous effect on the container manufacture, since the out-of-roundness only leads to certain indentations or bulges on the flanged edges of the container body and lid.
  • Fig. 1 shows the arrangement of circular punched parts which are used for further processing e.g. as a can end cover, on a sheet-like starting material,
  • 3 and 4 show the relationships according to FIG. 2 on a larger scale
  • FIG. 5 shows a stamped part according to FIG. 2 after it has been further processed into a can end cap.
  • a metal sheet of length a, width b and thickness c is used as the starting material.
  • a sheet metal strip from a roll can also be used.
  • metal sheets are preferably used when the starting material has to be provided with a coating layer, for example a food-grade lacquer, before the actual stamping process.
  • the material is preferably used in the form of a sheet metal blank according to FIG. 2.
  • the individual stamped parts are arranged in staggered rows in the form of a tight disc pack. Under the condition that the contour of the stamped parts is round, a theoretical utilization of 86.7% of the surface would be possible with mutual punctiform contact of adjacent stamped parts.
  • punching tools have finite dimensions, the disks must be arranged with a mutual contour spacing x. In conventional stamping processes, this distance x is 2 to 3 times the material thickness c or approximately 1 mm. With the method according to the invention, this distance x can be reduced to values equal to or less than the material thickness c.
  • the punching waste is already removed from the level of the starting material except for the material bridge 5.
  • the individual disks are still connected in a dimensionally stable manner via the material bridges and can be removed in the form of a sheet-like structure from the area of the first punching tools.
  • the openings formed by punching out the sections 7 serve as engagement openings for transport mechanisms. These guide and position the structure of connected disks under the second punching tool, by means of which all material bridges along the geometric lines 4 1 , 4 "of two adjacent disks are punched away simultaneously or successively.
  • O PI shows, the peripheral area of a lid 8 is rolled together with the edge area of the can jacket 9 to form a fold 10.
  • the disks according to FIGS. 2 to 4 are arranged on the starting material in such a way that the geometric lines (here circles) forming the majority of the final contour (here circles) of two adjacent stamped parts intersect on the associated material bridge.
  • sections 13 are cut individually or all of them are punched out simultaneously from the sheet of material to form rounded radii r in the area of the material bridge 5.
  • the material bridge as such is essentially linear.
  • the adjacent stamped parts are separated using cutting tools. Possible Before parting line geometries are listed in claim 3. In particular in the case of wavy or toothed dividing lines, the stability of the connection point 10 with the can jacket is substantially improved.
  • the stability of the stamped parts connected in the form of a perforated sheet-like structure after the first processing step is also important.
  • FIGS. 3 and 4 show further details of the embodiment according to FIG. 2. It is assumed that the separating cut takes place along a straight line 6.
  • the material triangles 13 punched out in the first step also have rounded corners, the radius of which is r 1 corresponds to and corresponds at least to approximately half the material thickness.
  • the section line 6 runs partly inside, partly outside the circular circumferential line of the disk or blank to be produced, which is indicated by dashed lines, in such a way that at the ends of the cutting lines 6, tips 14 are formed which protrude slightly beyond the circular circumferential line.
  • These contours of the disks, which run slightly inside and slightly outside the circular circumferential line play no role in the flanging with the container body according to FIG. 5, but do allow the considerable material savings mentioned above.
  • intersection line 6 is deliberately not drawn completely symmetrically to the adjacent disks or not exactly through the two intersection points of the circular circumferential lines in order to indicate that these are slightly irrelevance does not matter.
  • the cut lies clearly within the rounded, exposed sides r of the bridge between adjacent panes, and there is no danger that there will be pointed eyebrows, as is the case in the case of triangles which are pointed at the intersections of the circular contours and are not exactly symmetrical guided cut could be the case.
  • the stamped parts can also be separated in the second processing step by a cutting process other than cutting.
  • the desired Trennli ⁇ nienform be mapped by means of a notch to be subsequently separated by tearing off or angling the notify hard "stampings.
  • the method according to the invention is not limited to the production of round or essentially round stamped parts. It is equally possible, e.g. to produce elliptical parts to save material. It is also essential for such parts that all or a large part of the waste material is punched out by the first processing step. What is not shown in the figures, in addition to the triangular tips 7 and 13, the edge portions 7 'and 13' are stamped out step by step.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

Dans une première étape d'usinage, on retire sous forme de chutes (7), une grande partie des rognures se trouvant entre les pièces à découper (1', 1'') voisine sur le matériau de départ. Les parts de matériau restants (5) sont separés ou découpés plus tard, lors d'une second étape d'usinage. Ce procédé permet de rapprocher les contours de pièces à découper voisines (1', 1'') jusqu'à un écartement (x) égal ou inférieur à l'épaisseur du matériau. Par rapport aux procédés de découpage habituels au cours desquels est retirée la partie découpée et non la chute comme c'est le cas ici, il est possible d'atteindre un gain de matériau pouvant aller jusqu'à 2.5%. Les parties découpées ainsi formées sont utilisées en particulier pour un usinage supplémentaire en tant que parties de parois de récipient, par exemple des couvercles de fermeture de conserves ou des couvercles de boîtiers de batteries.
PCT/CH1984/000041 1983-03-15 1984-03-15 Procede de fabrication de pieces decoupees avec economie de materiau WO1984003647A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH142283 1983-03-15

Publications (1)

Publication Number Publication Date
WO1984003647A1 true WO1984003647A1 (fr) 1984-09-27

Family

ID=4210089

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1984/000041 WO1984003647A1 (fr) 1983-03-15 1984-03-15 Procede de fabrication de pieces decoupees avec economie de materiau

Country Status (3)

Country Link
EP (1) EP0139666A1 (fr)
AU (1) AU2652384A (fr)
WO (1) WO1984003647A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4681001A (en) * 1985-07-01 1987-07-21 Km-Engineering Ag Method of making scroll strip blanks
US4846033A (en) * 1985-07-01 1989-07-11 Km-Engineering Ag Apparatus for making blanks and strips of blanks
DE102006050018A1 (de) * 2006-10-24 2008-04-30 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Verfahren zur Gewinnung von Werkstückausschnitten aus einem plattenartigen Werkstück
WO2012136262A1 (fr) * 2011-04-07 2012-10-11 Tomologic Ab Procédé, système et programme d'ordinateur pour une machine qui découpe plusieurs morceaux dans une pièce de matière en utilisant des règles de commande et des variables pour le découpage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2335292A (en) * 1942-04-03 1943-11-30 Robert W Messenger Sheet and method of producing same for the economical production of blanks
US2352118A (en) * 1942-02-16 1944-06-20 Illinois Tool Works Washer strip and method and apparatus for producing same
US2378041A (en) * 1942-04-06 1945-06-12 Sebell Harry Process of forming can-end blanks
FR2130127A1 (fr) * 1971-03-19 1972-11-03 Lachaussee Maurice
FR2384562A1 (fr) * 1976-09-15 1978-10-20 Aerosol Inventions Dev Procede de decoupe des pieces avant emboutissage sur outil a suivre
DE2827138A1 (de) * 1978-06-21 1980-01-10 Schoen & Cie Gmbh Brueckentellerstanzmaschine zum stanzen von ronden

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2352118A (en) * 1942-02-16 1944-06-20 Illinois Tool Works Washer strip and method and apparatus for producing same
US2335292A (en) * 1942-04-03 1943-11-30 Robert W Messenger Sheet and method of producing same for the economical production of blanks
US2378041A (en) * 1942-04-06 1945-06-12 Sebell Harry Process of forming can-end blanks
FR2130127A1 (fr) * 1971-03-19 1972-11-03 Lachaussee Maurice
FR2384562A1 (fr) * 1976-09-15 1978-10-20 Aerosol Inventions Dev Procede de decoupe des pieces avant emboutissage sur outil a suivre
DE2827138A1 (de) * 1978-06-21 1980-01-10 Schoen & Cie Gmbh Brueckentellerstanzmaschine zum stanzen von ronden

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4681001A (en) * 1985-07-01 1987-07-21 Km-Engineering Ag Method of making scroll strip blanks
US4846033A (en) * 1985-07-01 1989-07-11 Km-Engineering Ag Apparatus for making blanks and strips of blanks
DE102006050018A1 (de) * 2006-10-24 2008-04-30 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Verfahren zur Gewinnung von Werkstückausschnitten aus einem plattenartigen Werkstück
US7992475B2 (en) 2006-10-24 2011-08-09 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Plate workpiece processing
WO2012136262A1 (fr) * 2011-04-07 2012-10-11 Tomologic Ab Procédé, système et programme d'ordinateur pour une machine qui découpe plusieurs morceaux dans une pièce de matière en utilisant des règles de commande et des variables pour le découpage
CN103608145A (zh) * 2011-04-07 2014-02-26 特摩劳吉克公司 使用切割控制规则和变量在一块材料上切割多个工件的方法、系统和计算机程序
RU2594921C2 (ru) * 2011-04-07 2016-08-20 Томолоджик Аб Способ, система и компьютерная программа для машинной резки нескольких частей из заготовки материала с использованием регулирующих правил и переменных для резки
US9469338B2 (en) 2011-04-07 2016-10-18 Tomologic Ab Method of, system and computer program for machine cutting several parts of a piece of material using controlling rules and variables for cutting
EP2694241B1 (fr) 2011-04-07 2021-10-13 Tomologic AB Procédé, système et programme d'ordinateur pour une machine qui découpe plusieurs morceaux dans une pièce de matière en utilisant des règles de commande et des variables pour le découpage

Also Published As

Publication number Publication date
AU2652384A (en) 1984-10-09
EP0139666A1 (fr) 1985-05-08

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