EP0325947A2 - Procédé et outil progressif pour pièces estampées - Google Patents

Procédé et outil progressif pour pièces estampées Download PDF

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Publication number
EP0325947A2
EP0325947A2 EP89100405A EP89100405A EP0325947A2 EP 0325947 A2 EP0325947 A2 EP 0325947A2 EP 89100405 A EP89100405 A EP 89100405A EP 89100405 A EP89100405 A EP 89100405A EP 0325947 A2 EP0325947 A2 EP 0325947A2
Authority
EP
European Patent Office
Prior art keywords
punched
die
stamped
embossing
punch
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
EP89100405A
Other languages
German (de)
English (en)
Other versions
EP0325947A3 (en
EP0325947B1 (fr
Inventor
Reinhard Tusch
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.)
E Winkemann & Co KG GmbH
Original Assignee
E Winkemann & Co KG GmbH
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 E Winkemann & Co KG GmbH filed Critical E Winkemann & Co KG GmbH
Publication of EP0325947A2 publication Critical patent/EP0325947A2/fr
Publication of EP0325947A3 publication Critical patent/EP0325947A3/de
Application granted granted Critical
Publication of EP0325947B1 publication Critical patent/EP0325947B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D53/00—Making other particular articles
    • B21D53/16—Making other particular articles rings, e.g. barrel hoops
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/08—Dies with different parts for several steps in a process

Definitions

  • the invention relates to a follow-up process for the production of stamped parts in several steps, such as shaping steps, catching step and punch cutout, the punched part being cut out by a punch in accordance with the outer contour of the punched part in cooperation with a die.
  • the punch cut-out always creates a punch feed, see DIN 6930, Figure 1.
  • the size of this punch feed depends on the material, the material thickness, the strength of the material and other parameters.
  • the punch feed cannot be avoided because it is caused by production.
  • the punch feed reduces the shape accuracy of the stamped parts.
  • the function of the stamped parts in the installed state is not guaranteed as a result of this stamping.
  • an additional machining operation e.g. B. grinding, necessary.
  • a layer of material is removed in the thickness of the punch feed.
  • the initial thickness of the sheet metal strip must be made larger by this grinding. This means high material consumption and also high labor costs for the additional grinding process.
  • the object of the invention is to provide a follow-up method which delivers stamped parts with an almost disappearing punch feed.
  • an embossing in the depth of a fraction of the punched strip thickness with an outer contour is somewhat larger than the outer contour of the stamped part in an embossing step preceding the stamped cutout and that the punch feed created during the embossing step is made to flow in the punch cutout, so that a cutting surface with straight profile lines is obtained.
  • the invention differs from the prior art in that in an additional stamping step with an oversize, a punched feed is intentionally generated. However, this punch feed is deformed in the punch cutout, so that a punched part with straight cutting lines is obtained which is free of punch feed. There is no post-processing.
  • the additional embossing step fits easily into the subsequent processing, without the need for an additional step.
  • the method of the invention is applicable to annular, disc-shaped or profiled stamped parts.
  • a particularly good cut surface in the punching cut is obtained in that the depth of the embossing is 10 to 50% of the thickness of the punched strip.
  • the quality of the cut surface can be further improved in that the depth of the embossing is 20 to 30% of the punched strip thickness.
  • the invention further proposes a follow-up tool for stamped parts with several stations, such as forming stations, catching station and cutting station, which comprises a stamping die corresponding to the outer contour of the stamped part and a corresponding die.
  • stations such as forming stations, catching station and cutting station
  • stamping die corresponding to the outer contour of the stamped part and a corresponding die.
  • embossing station is provided in front of the cutting station, the embossing stamp and embossing die of which has an outer contour slightly larger than the outer contour of the stamped part and that the depth of impression of the embossing stamp makes up a fraction of the stamped strip thickness.
  • This follow-on tool allows the production of stamped parts without punching.
  • An existing follow-up tool can easily be converted according to the teaching of the invention.
  • the transverse dimensions of the stamping die are up to 10% larger than the transverse dimensions of the stamped part.
  • a follow-up tool for producing annular disks from a punched strip 3 is shown.
  • the punching strip 3 runs between the lower tool 1 and the upper tool 2.
  • the 1st station is a punching station with a punch 4 and a die 5 for forming a hole 9.
  • a catch pin 6 can be seen, which is used to align the punched strip 3 in register.
  • an embossing stamp 7 can be seen which forms an internal countersink 8 of the hole 9.
  • a fourth station with an embossing stamp 10 and an embossing die 21 shows the essence of the invention.
  • the outer diameter of the stamp 10 is up to 10%, in particular up to 5% larger than the outer diameter of the finished stamped part 22.
  • the stamp 10 produces an embossed impression according to FIGS. 1 and 2 in the depth of a fraction of the stamped strip thickness.
  • the embossing impression is 10 to 50%, in particular 20 to 30% of the punched strip thickness.
  • 2 clearly shows the embossing step 11 on the side of the embossing stamp and the punch feed 12 on the opposite side of the punched strip 3.
  • the dashed lines 23 indicate the nominal diameter of the finished stamped part.
  • the opposite inner countersink 16 of the hole 9 is formed by means of a lower die 13, a holder 14 and a core 15.
  • the last station there is also a catch pin 19 and also a punch 17 which cooperates with a die 18.
  • the outer diameter of the punch 17 corresponds to the finished diameter of the stamped part 22. It can be seen that the outer edge and the outer edge of the embossing stage 11 remain.
  • the punch feed 12 on the opposite side is made to flow when cut out and deformed into a cylindrical cutting surface with smooth and straight cutting lines, as can be clearly seen from FIG. 3.
  • the stamped part 22 is ejected in the direction of the arrow.
  • FIG. 3 The outer surface of the finished stamped part according to FIG. 3 is exactly one cylinder surface. A punch feed does not occur to any appreciable extent on.
  • FIG. 4 shows a stamped part 22 which is produced by a conventional follow-up method. One recognizes the clear punch feed 20, which in many cases requires a post-treatment to make the punch part fully usable.
  • annular disc The production of an annular disc is shown above.
  • the invention can also be used in the production of solid panes and molded parts of any profiling. In the subsequent process, of course, other usual intermediate steps for deformation can be carried out. A follow-up tool can still be retrofitted so that the method according to the invention can be carried out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
EP19890100405 1988-01-27 1989-01-11 Procédé et outil progressif pour pièces estampées Expired - Lifetime EP0325947B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3802247 1988-01-27
DE19883802247 DE3802247C1 (fr) 1988-01-27 1988-01-27

Publications (3)

Publication Number Publication Date
EP0325947A2 true EP0325947A2 (fr) 1989-08-02
EP0325947A3 EP0325947A3 (en) 1990-09-05
EP0325947B1 EP0325947B1 (fr) 1992-05-20

Family

ID=6346018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890100405 Expired - Lifetime EP0325947B1 (fr) 1988-01-27 1989-01-11 Procédé et outil progressif pour pièces estampées

Country Status (3)

Country Link
EP (1) EP0325947B1 (fr)
DE (1) DE3802247C1 (fr)
ES (1) ES2032056T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT502173B1 (de) * 2004-03-12 2007-02-15 Gassner Ges M B H & Co Kg Verfahren zum lochen eines bleches
US7308814B2 (en) 2005-10-13 2007-12-18 Gassner Ges.M.B.H. & Co Kg Method for perforating a sheet
DE102012103167A1 (de) 2012-04-12 2013-10-17 BINDER-tecsys Kontakte GmbH Verfahren und Vorrichtung zur Verringerung eines Stanzeinzugs
WO2015185852A1 (fr) 2014-06-02 2015-12-10 Centre Technique Des Industries Mecaniques Procédé et installation de transformation progressive de matériau métallique en bande
DE102016107300A1 (de) * 2016-04-20 2017-10-26 Elringklinger Ag Verfahren zur Herstellung einer zwischen Gehäuseteilen einer Steuerung für druckmittelbetriebene Verbraucher montierbare Zwischenplatte sowie eine derartige Zwischenplatte
FR3084602A1 (fr) * 2018-07-31 2020-02-07 Precitechnique Dauphine Outils d’une presse a emboutir et procede d’emboutissage mettant en œuvre de tels outils

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19755104C2 (de) * 1997-12-11 2000-11-02 Freudenberg Carl Fa Verfahren zur Herstellung eines Ringes
DE102013217303A1 (de) * 2013-08-30 2015-03-05 Robert Bosch Gmbh Stanzgitter für ein Premold-Sensorgehäuse
CH711646A1 (de) * 2015-10-14 2017-04-28 Hatebur Umformmaschinen Ag Verfahren und Vorrichtung zur Herstellung eines ringförmigen Formteils.
CN112207202B (zh) * 2020-10-20 2022-08-19 东风汽车零部件(集团)有限公司通用铸锻分公司 一种锥形挡圈镦挤压成形方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724305A (en) * 1969-11-15 1973-04-03 K Kondo Precision shearing method
DE2727445B1 (de) * 1977-06-18 1979-01-04 Lange Kurt Prof Dr Ing Verfahren und Vorrichtung zum Ausschneiden und/oder Lochen von Werkstuecken aus metallischen Flachwerkstoffen
US4477537A (en) * 1982-09-23 1984-10-16 Blase Tool And Manufacturing Co., Inc. Method for producing burr-free blanks and the blanks produced thereby
EP0131770A1 (fr) * 1983-07-08 1985-01-23 DAKO-Werkzeugfabriken David Kotthaus GmbH & Co. KG Procédé pour le découpage fin de pièces et outil de découpage fin pour la mise en oeuvre de ce procédé

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH665367A5 (en) * 1984-09-17 1988-05-13 Feintool Ag Eliminating material burr at edges of press-cut component - by at least one corrective cutting step on step-wise moving metal strip
CH669748A5 (fr) * 1984-11-28 1989-04-14 Feintool Int Holding

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724305A (en) * 1969-11-15 1973-04-03 K Kondo Precision shearing method
DE2727445B1 (de) * 1977-06-18 1979-01-04 Lange Kurt Prof Dr Ing Verfahren und Vorrichtung zum Ausschneiden und/oder Lochen von Werkstuecken aus metallischen Flachwerkstoffen
US4477537A (en) * 1982-09-23 1984-10-16 Blase Tool And Manufacturing Co., Inc. Method for producing burr-free blanks and the blanks produced thereby
EP0131770A1 (fr) * 1983-07-08 1985-01-23 DAKO-Werkzeugfabriken David Kotthaus GmbH & Co. KG Procédé pour le découpage fin de pièces et outil de découpage fin pour la mise en oeuvre de ce procédé

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT502173B1 (de) * 2004-03-12 2007-02-15 Gassner Ges M B H & Co Kg Verfahren zum lochen eines bleches
US7308814B2 (en) 2005-10-13 2007-12-18 Gassner Ges.M.B.H. & Co Kg Method for perforating a sheet
DE102012103167A1 (de) 2012-04-12 2013-10-17 BINDER-tecsys Kontakte GmbH Verfahren und Vorrichtung zur Verringerung eines Stanzeinzugs
DE102012103167B4 (de) 2012-04-12 2018-08-02 BINDER tecsys GmbH Verfahren und Vorrichtung zur Verringerung eines Stanzeinzugs
WO2015185852A1 (fr) 2014-06-02 2015-12-10 Centre Technique Des Industries Mecaniques Procédé et installation de transformation progressive de matériau métallique en bande
DE102016107300A1 (de) * 2016-04-20 2017-10-26 Elringklinger Ag Verfahren zur Herstellung einer zwischen Gehäuseteilen einer Steuerung für druckmittelbetriebene Verbraucher montierbare Zwischenplatte sowie eine derartige Zwischenplatte
FR3084602A1 (fr) * 2018-07-31 2020-02-07 Precitechnique Dauphine Outils d’une presse a emboutir et procede d’emboutissage mettant en œuvre de tels outils

Also Published As

Publication number Publication date
DE3802247C1 (fr) 1989-05-18
ES2032056T3 (es) 1993-01-01
EP0325947A3 (en) 1990-09-05
EP0325947B1 (fr) 1992-05-20

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