EP0043389B1 - Outil et procédé de coupe de haute précision - Google Patents

Outil et procédé de coupe de haute précision Download PDF

Info

Publication number
EP0043389B1
EP0043389B1 EP80200663A EP80200663A EP0043389B1 EP 0043389 B1 EP0043389 B1 EP 0043389B1 EP 80200663 A EP80200663 A EP 80200663A EP 80200663 A EP80200663 A EP 80200663A EP 0043389 B1 EP0043389 B1 EP 0043389B1
Authority
EP
European Patent Office
Prior art keywords
cutting
punch
plate
support
retaining
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.)
Expired
Application number
EP80200663A
Other languages
German (de)
English (en)
Other versions
EP0043389A1 (fr
Inventor
Johannes Haack
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.)
Feintool AG
Original Assignee
Feintool 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 Feintool AG filed Critical Feintool AG
Priority to AT80200663T priority Critical patent/ATE9768T1/de
Priority to EP80200663A priority patent/EP0043389B1/fr
Priority to DE8080200663T priority patent/DE3069413D1/de
Priority to SU813301193A priority patent/SU1032994A3/ru
Priority to DD81231374A priority patent/DD201757A5/de
Priority to US06/279,560 priority patent/US4509395A/en
Priority to CA000381367A priority patent/CA1175341A/fr
Publication of EP0043389A1 publication Critical patent/EP0043389A1/fr
Application granted granted Critical
Publication of EP0043389B1 publication Critical patent/EP0043389B1/fr
Expired legal-status Critical Current

Links

Images

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
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/06—Blanking

Definitions

  • the invention relates to a tool for a fineblanking machine according to the preamble of claim 1 and a method for operating the same.
  • the fineblanking technique differs from normal punching in particular in that the workpiece is clamped between a cutting plate and a press plate, also called a cutting and holding plate, before the cutting process begins, and on the workpiece a counterholder acts on the opposite side.
  • the holding plate and, if necessary, also the cutting plate each carry an annular tooth following the partial contour, which is pressed into the workpiece before the cutting process.
  • Fineblanked parts are used in a number of industrial sectors in thicknesses between 0.3 mm and 15 mm.
  • US-A-1 995 446 describes a punching device for producing metal rakes, especially garden rakes.
  • the stamp B punches recesses through the metal strip C into the form A with the form plate 10 and form slots 16, 17 into it by means of the punch tools 18, 19.
  • bolts 24 and 25 are provided in the mold plate 10 on opposite sides of the mold slot 16, which engage in the already punched recesses and thus secure the material to be punched.
  • the bolts are under the action of the coil springs 27.
  • a wiper plate 30 is also provided.
  • the known device is not a fineblanking tool since the counter holder is missing. It is also not a question of high-quality, tear-free smooth cuts and there is also no question that the limit values of fineblanking technology would be sought.
  • DE-C-511 609 describes a punching device in which the workpiece S is guided and cut by the stationary shear knife 3 by means of a movable jaw 2, whereupon the remaining part of the workpiece A is clamped between the movable jaw 2 and the stationary jaw 1 and punched by stamp 5.
  • the essence of the invention is to be seen in the fact that the material is laterally supported on its outer surface outside the cutting line at critical points by the support members. What is critical at first is always the part of the lateral surface that is closest to the cutting line and the distance between it, the web or edge width, is smaller than the material thickness. But even if this distance is greater than the material thickness, but the diameter of the hole to be cut is smaller than the material thickness, the invention has a surprisingly advantageous effect: Apparently the pressure distribution in the workpiece is influenced by the support so favorably that the cutting process is thereby considerably facilitated and thus the service life of the tool is increased sustainably. Especially in this case, however, the cutting punch should be surrounded on its entire circumference by one or more support members.
  • the values achievable in fineblanking with a ring spike are unforeseen improved to a degree.
  • the invention makes it possible to design interior and exterior shapes up to the limit values D / S ⁇ 2 / 3; A / S ⁇ to manufacture, in steel and non-ferrous metals, with thicknesses from 1 mm to 20 mm, even up to 30 mm.
  • a cutting punch 1 designed as a punch is shown, which penetrates the material clamped and to be punched between the holding member 4, designed as a holding plate, and the cutting plate 2, down to the cutting plate 2.
  • the punch 1 is moved forward with the cutting force F s .
  • the counterholder 8 counteracts it with the counterforce F G.
  • the punched part 7 cut out of the punched grid 6 is shown between the punch 1 and the counter holder 8.
  • the lead frame 6 is thus a perforated plate
  • the stamped part 7 is a waste slug.
  • the holding force F H is transmitted to the holding plate 4 by the pressure bolts 5.
  • the material to be cut is not held in place by means of an annular spike provided on the holding plate 4. Rather, the holding plate 4 has special holes 9 through which longitudinally movable support stamps 3 pass. These support the material to be punched on the lateral surfaces 11 of the holes adjacent to the cutting line 12.
  • the holes 9 have a diameter of 1.02 to 1.06 the diameter of the support stamp 3, so that there is a game x, and any jamming is avoided.
  • the punch 1 is surrounded on all sides by support stamps 3.
  • the diameter of a support punch 3 is equal to the diameter D of the punch 1 or the hole to be cut, so that the holes adjacent to the cutting line of the material to be punched are supported on their entire circumferential surface.
  • the shortest distance A (see FIG. FIG. 3) between the punch 1 and an adjacent support punch 3 may be between 1/3 and 2/3 of the thickness S of the lying material to be cut, and the diameter D of the hole punch 1 is between 2/3 and 1/1 of the thickness S, and yet be obtained high quality cut surfaces without tearing. This is completely unattainable with known techniques, not even by fine cutting with a ring spike.
  • This first punching process can still be carried out without the participation of the support stamp 3, since the area of the punching has not yet been weakened by surrounding holes.
  • the clamping of the material via the forces F H and F G prevents the material from bending, and the force F H ensures that the punched grid 6 is stripped from the punch 1 after the punching process has been carried out when the punch is withdrawn.
  • the holding plate 4 then strips the lead frame or perforated plate 6 from the punch and the same is then moved until the first cut hole comes to rest under a support punch 3.
  • the punched grid 6 can be moved into the new hole position by hand or via automatically driven coordination.
  • the support stamp 3 is then inserted into the cut hole, then the material clamped the holding plate 4, and finally cut the next hole by means of the punch 1 acting against the counter-holder 8. During this punching process, the support punch 3, which is retracted into the first hole, already has a lateral support.
  • the holding plate 4 carries the hole pattern to be cut into the material in shape and distance. As can be seen, the process consists of four bars, i. H. the device according to the invention has four functions.
  • the individual elements of the device can be driven mechanically or hydraulically.
  • a hydraulic drive is advantageous because it enables the individual forces, speeds of the elements and the cutting path to be better controlled.
  • a perforated plate is shown in cross section, as can be produced in the manner described above.
  • the cut surfaces of the holes are smooth and tear-free.
  • the achievable limits are D / S> 2/3; A / S> 1 / a .
  • the invention in the described embodiment can be used e.g. B. in the production of sieve sorting plates for seeds, sieve sorting plates for food processing, cutting plates for a meat grinder, cooling line support plates for reactors, etc.
  • the lateral support is now provided by a support member 3, which is designed as a support plate concentrically surrounding the cutting punch 1 and movable in its direction. With its inner recess, the support plate is brought into positive engagement with the outer shape to be punched. The support plate 3 thus supports the outer shape in its lateral surface 11 by positive locking. The positive connection is achieved in that the support plate 3 is designed according to the outer shape. The support plate 3 is moved vertically with the control force F c . It must be stable enough that it can absorb the horizontal forces emanating from the lead frame 6 when cutting.
  • the device is operated in principle as described for FIGS. 1 and 2. That is, the outer shape is first clamped by means of the ring-shaped holding member 4 and supported laterally by means of the support plate 3, and then punched by means of a punch 1 and counter-holder 8.
  • the form-fitting lateral support of the shapes to be punched makes it possible to produce round or shaped holes with the smallest diameters and / or web and edge widths in relation to the material thickness.
  • the result is highly smooth perforated walls with the highest degree of measurement accuracy, which cannot be achieved by a conventional drilling, milling or punching process, and at the same time with a long service life of the tool. Examples are shown in Fig. 8 ... 12.
  • the support member 3 here consists of four clamping parts which can be positively and positively attached to the lateral surface 11 of the blank and which are moved with the control force F c .
  • the holding member 4 is designed as an annular extension of a pressure part connected to the pressure bolts 5.
  • the clamping parts or the control force F c support the blank during cutting.
  • 16 round blanks 7 are cut out, which can be formed into sleeves, for example, in a subsequent extrusion processing.
  • the lead frame 6, here in the form of a waste ring has an extremely small edge width A in relation to the material thickness S, for example 30% of S. In this way, in spite of the high-quality cutting surface, substantial material savings are achieved.
  • the stamped part 7 is a gear.
  • the lead frame 6 shown above in FIG. 17 is a waste ring of edge width A with internal teeth.
  • the edge width A can be made extremely small, so that, despite the excellent quality of the tooth cut surfaces, a remarkable material saving is achieved here.
  • the support members 3 are brought into supportive contact with all the parts of the lateral surface 11 of the part whose distance from the cutting line 12 is smaller as the Material thickness S.
  • the part When making particularly small holes, the part must be supported as far as possible over its entire circumference. This makes cutting easier and significantly increases the tool life.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Turning (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (10)

1. Outil pour machine de coupe de haute précision pour la fabrication de formes intérieures et/ ou extérieures en matériau métallique, où le diamètre de perforation (D) ou la largeur de bord ou l'intervalle entre perforations (A) dans la pièce poinçonnée (6) est inférieur à l'épaisseur du matériau (S), avec une plaque de coupe (2) et un élément de maintien (4) pour le serrage du matériau et un poinçon de coupe (1) et une contre-bouterolle (8) agissant à l'encontre de celuici, caractérisé en ce que l'outil ne présente pas de bourrelet annulaire ni sur la plaque de coupe (2) ni sur l'élément de maintien (4) mais est pourvu d'au moins un élément de support (3) disposé latéralement par rapport au poinçon de coupe (1) pouvant être deplacé par celui-ci indépendamment au moyen d'une force de commande (Fc), cet élément étant conçu quant à sa forme et à sa distance par rapport au poinçon de coupe (1) de façon à pouvoir être amené en contact supportif, pendant au moins une phase du fonctionnement de la machine de coupe de haute précision, avec au moins la partie de la superficie (11) du matériau à usiner, à l'extérieur de la ligne de coupe (12), qui est la plus proche de celle-ci.
2. Outil selon la revendication 1, caractérisé en ce que l'élément de support (3) peut être amené en contact supportif avec toutes les parties de la superficie (11) dont la distance (a) jusqu'à la ligne de coupe (12) est inférieure à l'épaisseur du matériau (S).
3. Outil selon la revendication 1 ou 2, caractérisé en ce que le poinçon de coupe (1) est entouré sur toute sa périphérie d'un ou de plusieurs éléments de support (3).
4. Outil selon l'une des revendications 1 à 3 pour la fabrication de formes intérieures à partir de matériau sous forme de bandes ou de rubans, caractérisé en ce que les éléments de support (3) sont constitués sous forme de poinçons de support présentant le contour de découpage du poinçon de coupe (1) et que l'élément de maintien (4) est constitué sous forme d'une plaque de maintien avec des trous (9) pour les poinçons de support, et que les poinçons de support peuvent se déplacer dans la direction du poinçon de coupe (1) à travers les trous (9) dans la plaque de maintien jusqu'à la plaque de coupe (2) et que les poinçons de support sont répartis régulièrement autour du poinçon de coupe (1) et que les trous (9) dans la plaque de maintien présentent un diamètre égal à 1,02 à 1,06 fois le diamètre (D) du poinçon de support (3), qui doit y pénétrer.
5. Outil selon l'une des revendications 1 à 3 pour la fabrication de formes intérieures à partir de formes extérieures pré-usinées, caractérisé en ce que l'élément de support (3) est constitué sous forme d'une plaque de support entourant concentriquement le poinçon de coupe (1) et pouvant se déplacer dans sa direction et que l'élément de maintien (4) est constitué sous forme d'un anneau disposé entre la poinçon de coupe (1) et la plaque de support et que l'évidement intérieur de la plaque de support entourant le poinçon de coupe (1) est constitué de façon à ce qu'elle puisse être mise en contact positif de la superficie (11) de la forme extérieure à usiner sur toute sa périphérie.
6. Outil selon la revendication 1 ou 5, caractérisé en ce que la distance la plus courte (A) entre les surfaces du poinçon de coupe (1) et un poinçon de support ou l'évidement intérieur de la plaque de support et la surface du poinçon de coupe (1) est comprise entre 1/3 et 2fa de l'épaisseur (S) du matériau à découper (6) et/ou que le diamètre (D) du poinçon de coupe (1) est compris entre 2/3 et 1/1 de l'épaisseur (S) du matériau à découper (6).
7. Outil selon l'une des revendications 1 à 3 pour la fabrication de formes extérieures à partir d'ébauches pré-usinées, caractérisé en ce que les éléments de support (3) sont constitués sous forme de pièces de serrage pouvant être appliquées avec contact à friction et positif sur tous les côtes de l'ébauche et que l'élément de maintien (4) est constitué sous forme d'un anneau disposé entre le poinçon de coupe (1) et les pièces de serrage.
8: Procédé pour l'utilisation d'un outil selon la revendication 4 ou 6 pour la fabrication de tôles perforées en matériau métallique, où la plaque de maintien est appliquée tout d'abord avec une force de maintien (FH) sur le matériau à usiner et que le poinçon de coupe (1) est enfoncé ensuite avec une force de coupe (Fs) à travers le matériau et jusqu'à la plaque de coupe (2) vis-à-vis de la contre-force (Fc) de la contre-bouterolle (8) et qu'il est ensuite retiré, caractérisé en ce que la plaque de maintien est ensuite détachée du matériau et que celui-ci est d'éplacé suffisamment pour que le trou découpé (10) arrive sous un poinçon de support, que le poinçon de support est ensuite introduit dans le trou découpé (10) jusqu'à la plaque de coupe (2) et que le matériau est ensuite serré au moyen de la plaque de maintien et qu'un nouveau trou (10) est finalement découpé au moyen du poinçon de coupe (1) et de la contre-bouterolle (8).
9. Procédé pour l'utilisation d'un outil selon la revendication 5 ou 6, pour l'obtention d'un trou dans une forme extérieure préparée en matériau métallique, où le poinçon de coupe (1) est enfoncé avec une force de coupe (Fs) jusqu'à la plaque de coupe (2) vis-à-vis de la contre-force (FG) de la contre-bouterolle (8) à travers le matériau à découper (6) et est ensuite retiré, caractérisé en ce que, avant l'action du poinçon de coupe (1), la forme extérieure est serrée au moyen de la plaque de support par contact positif de l'élément de maintien (4) et que l'enlèvement de la forme extérieure perforée de l'outil a lieu après le retrait de l'élément de maintien (4) et de la plaque de support.
10. Procédé pour l'utilisation d'un outil selon la revendication 7, pour la fabrication d'une forme extérieure à partir d'une ébauche pré-usinée en matériau métallique, où le poinçon de coupe (1) est enfoncé avec une force de coupe (Fs) à travers l'ébauche jusqu'à la plaque de coupe (2) vis-à-vis de la contre-force (FG) de la contre-bouterolle (8) et qu'il est ensuite retiré, caractérisé en ce que l'ébauche est serrée au moyen des pièces de serrage par contact positif et au moyen de l'élément de maintien (4) avec une force de maintien (FH) et que l'enlèvement de l'outil de la pièce poinçonné (6) s'effectue après le retrait de l'élément de maintien (4) et des pièces de serrage.
EP80200663A 1980-07-08 1980-07-08 Outil et procédé de coupe de haute précision Expired EP0043389B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT80200663T ATE9768T1 (de) 1980-07-08 1980-07-08 Werkzeug und verfahren zum feinschneiden.
EP80200663A EP0043389B1 (fr) 1980-07-08 1980-07-08 Outil et procédé de coupe de haute précision
DE8080200663T DE3069413D1 (en) 1980-07-08 1980-07-08 Tool and method for precision cutting
SU813301193A SU1032994A3 (ru) 1980-07-08 1981-06-23 Штамп дл вырубки деталей из металлической заготовки или пробивки отверстий
DD81231374A DD201757A5 (de) 1980-07-08 1981-07-01 Werkzeug und verfahren zum feinschneiden
US06/279,560 US4509395A (en) 1980-07-08 1981-07-01 Process for precision cutting
CA000381367A CA1175341A (fr) 1980-07-08 1981-07-08 Methode et outil de decoupage de precision a l'emporte-piece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80200663A EP0043389B1 (fr) 1980-07-08 1980-07-08 Outil et procédé de coupe de haute précision

Publications (2)

Publication Number Publication Date
EP0043389A1 EP0043389A1 (fr) 1982-01-13
EP0043389B1 true EP0043389B1 (fr) 1984-10-10

Family

ID=8187020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80200663A Expired EP0043389B1 (fr) 1980-07-08 1980-07-08 Outil et procédé de coupe de haute précision

Country Status (7)

Country Link
US (1) US4509395A (fr)
EP (1) EP0043389B1 (fr)
AT (1) ATE9768T1 (fr)
CA (1) CA1175341A (fr)
DD (1) DD201757A5 (fr)
DE (1) DE3069413D1 (fr)
SU (1) SU1032994A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103527916A (zh) * 2013-10-21 2014-01-22 青岛海信电器股份有限公司 一种待冲压金属件

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324680A1 (de) * 1983-07-08 1985-01-24 DAKO-Werkzeugfabriken David Kotthaus GmbH & Co KG, 5630 Remscheid Verfahren zum feinschneiden von werkstuecken und feinschneidwerkzeug zur ausuebung des verfahrens
CN101274345B (zh) * 2007-03-28 2011-12-21 鸿富锦精密工业（深圳）有限公司 金属壳体成型方法及其采用的旋切装置
DE102008026893A1 (de) 2008-06-05 2009-12-10 Schaeffler Kg Verfahren zum Herstellen eines Käfigelements für einen Wälzlagerkäfig und Wälzlagerkäfig

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE511609C (de) * 1928-11-03 1930-10-31 Nat Machinery Co Vorrichtung zur Herstellung von durchlochten Werkstuecken
US1995466A (en) * 1932-12-03 1935-03-26 Bishop Frank Punching mechanism
DE1951811A1 (de) * 1968-10-17 1970-05-21 Western Electric Co Verfahren und Einrichtung zum Lochstanzen
DE1957011A1 (de) * 1969-11-13 1971-05-27 Fischer Brodbeck Gmbh Praez St Stanzwerkzeug fuer Kleinlochungen

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1147364A (en) * 1913-08-15 1915-07-20 William S Bidle Machine for making nut-blanks.
GB411948A (en) * 1932-12-31 1934-06-21 David Etchells And Son Ltd Improvements in, or relating to, nut forging machines
FR1042580A (fr) * 1950-05-23 1953-11-02 L Morane Ets Procédé de perçage de lingots métalliques et presse pour la mise en oeuvre de ceprocédé
FR1112344A (fr) * 1953-11-12 1956-03-13 Kabel U Metallwerke Neumeyer A Procédé et dispositif d'estampage à la presse, en particulier à froid, de pièces de forme à collerette, en métal, de préférence en acier
US3174318A (en) * 1958-01-23 1965-03-23 Daniel M Fox Method of forming articles from ductile materials
US3232156A (en) * 1963-12-26 1966-02-01 Harrington & King Perforating Multiple step perforating of sheet metal
US3296905A (en) * 1965-01-08 1967-01-10 John S Killaly Compressive stripping unit and indexing type nibbling punch for turret punch presses and the like
DE1292110B (de) * 1966-03-17 1969-04-10 Schlegel Geschlossenes Gesenk fuer Gesenkschmiedehaemmer und -pressen
CH475805A (de) * 1967-06-05 1969-07-31 Feintool Ag Feinschnittstanzwerkzeug
DE2034043A1 (de) * 1970-07-09 1972-01-13 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Vorrichtung zur spanlosen Herstellung von Kegelzahnrädern
US3788177A (en) * 1971-07-02 1974-01-29 R Williamson Forming tool and fixture therefor
US3971275A (en) * 1975-09-18 1976-07-27 Mach John J Nestable die alignment means for punch press machines
US4277994A (en) * 1977-10-17 1981-07-14 Gargrave Robert J Matrix element
US4299112A (en) * 1977-10-20 1981-11-10 Kabushiki Kaisha Wako Method and device for producing synchronizer ring
JPS56163048A (en) * 1980-05-21 1981-12-15 Wako:Kk Precision die forging method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE511609C (de) * 1928-11-03 1930-10-31 Nat Machinery Co Vorrichtung zur Herstellung von durchlochten Werkstuecken
US1995466A (en) * 1932-12-03 1935-03-26 Bishop Frank Punching mechanism
DE1951811A1 (de) * 1968-10-17 1970-05-21 Western Electric Co Verfahren und Einrichtung zum Lochstanzen
DE1957011A1 (de) * 1969-11-13 1971-05-27 Fischer Brodbeck Gmbh Praez St Stanzwerkzeug fuer Kleinlochungen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103527916A (zh) * 2013-10-21 2014-01-22 青岛海信电器股份有限公司 一种待冲压金属件
CN103527916B (zh) * 2013-10-21 2016-05-11 青岛海信电器股份有限公司 一种待冲压金属件

Also Published As

Publication number Publication date
CA1175341A (fr) 1984-10-02
ATE9768T1 (de) 1984-10-15
US4509395A (en) 1985-04-09
SU1032994A3 (ru) 1983-07-30
EP0043389A1 (fr) 1982-01-13
DD201757A5 (de) 1983-08-10
DE3069413D1 (en) 1984-11-15

Similar Documents

Publication Publication Date Title
EP0155619B1 (fr) Procédé pour réaliser des liaisons de tôles
DE19738635C2 (de) Verfahren zum Herstellen von exakten Schnittflächen
EP0131770B1 (fr) Procédé pour le découpage fin de pièces et outil de découpage fin pour la mise en oeuvre de ce procédé
DE3623035C1 (de) Verfahren und Vorrichtung zum Herstellen eines eine scharfe Schneidkante aufweisenden Stanzwerkzeugs
DE19647963C2 (de) Verfahren und Vorrichtung zur Herstellung von Löchern am Umfang von Hohlprofilen
EP0278046A1 (fr) Outil pour l'estampage de figures de matrice complexes à partir d'un ruban métallique
DE1918780C2 (de) Verfahren und Vorrichtung zum Feinschneiden von Werkstücken aus Blech
EP1166915B1 (fr) Dispositif et procédé de fabrication des joints d' étanchéité
DE3116765C1 (de) Werkzeug zum Herstellen von Senkloechern oder Passloechern in einem Blech auf einer Stanzmaschine
DE4411410A1 (de) Kaltformverfahren für Zahnringprodukte und Gerät zum Ausformen derselben
CH665367A5 (en) Eliminating material burr at edges of press-cut component - by at least one corrective cutting step on step-wise moving metal strip
DE2727445B1 (de) Verfahren und Vorrichtung zum Ausschneiden und/oder Lochen von Werkstuecken aus metallischen Flachwerkstoffen
EP0043389B1 (fr) Outil et procédé de coupe de haute précision
WO2009065694A1 (fr) Procédé de formation d'une surface de coupe sans barbes et dispositif en vue de l'exécution du procédé
DE1937818A1 (de) Verfahren und Vorrichtung zum Ausstanzen sechseckiger Rohlinge
DE4444857C1 (de) Verfahren und Vorrichtung zur Herstellung mindestens einer Öffnung in der Wandung eines rohrartigen Teils
DE19643076C2 (de) Vorrichtung zum in einem Arbeitsgang erfolgenden Stanzen und Fügen mindestens zweier Blechteile
DE19957076B4 (de) Verfahren und Vorrichtung zum Lochen von Blechformteilen aus einem Aluminiumwerkstoff
DE3204032C2 (fr)
DE19802380C2 (de) Verfahren zum Formen einer keilförmigen Rastnase an einem Rohling mit zylindrischer Nabe
EP0611615A1 (fr) Procédé de fabrication de dentures, en particulier de segments dentés
DE3242347C2 (fr)
EP0027247B1 (fr) Outil de poinçonnage
DE2344831B2 (de) Verfahren zur Herstellung gekrümmter Fittings und Verwendung einer Einrichtung zur Durchführung des Verfahrens
DE102015114074A1 (de) Vorrichtung und Verfahren zum Trennen eines Werkstückes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19820521

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT CH DE FR GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19841010

Ref country code: NL

Effective date: 19841010

REF Corresponds to:

Ref document number: 9768

Country of ref document: AT

Date of ref document: 19841015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3069413

Country of ref document: DE

Date of ref document: 19841115

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19910614

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19910619

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19910624

Year of fee payment: 12

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910805

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910808

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19920708

Ref country code: AT

Effective date: 19920708

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19920731

Ref country code: CH

Effective date: 19920731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19921126

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19920708

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19930331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST