EP0940201A2 - Procédé de rétreindre de pièces - Google Patents

Procédé de rétreindre de pièces Download PDF

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Publication number
EP0940201A2
EP0940201A2 EP99103372A EP99103372A EP0940201A2 EP 0940201 A2 EP0940201 A2 EP 0940201A2 EP 99103372 A EP99103372 A EP 99103372A EP 99103372 A EP99103372 A EP 99103372A EP 0940201 A2 EP0940201 A2 EP 0940201A2
Authority
EP
European Patent Office
Prior art keywords
pairs
rollers
radial direction
workpiece
axis
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Withdrawn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
EP99103372A
Other languages
German (de)
English (en)
Other versions
EP0940201A3 (fr
Inventor
Wolf Eisentraut
Heinrich Wolf Wolf
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.)
WC Heraus GmbH and Co KG
Original Assignee
WC Heraus 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 WC Heraus GmbH and Co KG filed Critical WC Heraus GmbH and Co KG
Publication of EP0940201A2 publication Critical patent/EP0940201A2/fr
Publication of EP0940201A3 publication Critical patent/EP0940201A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/02—Special design or construction
    • B21J7/14—Forging machines working with several hammers
    • B21J7/16—Forging machines working with several hammers in rotary arrangements

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • the invention is based on the Task to form workpieces into profiles that also deviate from the axial symmetry Can have profile, such as strand-shaped workpieces (semi-finished products) with a rectangular Cross-section; a possible graph and crack formation on the outer edges of the shaped workpieces can be prevented.
  • FIGS. 1a with a cross-sectional representation
  • 1b with a cross-sectional representation of work steps A, B and C for processing of the workpiece (semi-finished product) explained in more detail.
  • FIG. 1a workpiece 2 is pushed into the profile kneading machine along a central axis 1, the feeding and holding device for such a strand-shaped Workpiece (semi-finished product) 2 is not shown here.
  • the dies acting on the workpiece 4 and plunger 5 and any spacer elements 9 in between are radial to the central axis 1 slidably arranged in a slide guide 11, which is arranged in a cross or star shape
  • Has hollow profiles 12 for guiding dies 4 and plungers 5; 4 and Tappets 5 are biased in the radial direction outwards by spring force, so that the surface the workpiece is freely movable in the idle state.
  • the sliding guide 11 is arranged in a stationary manner and of a roller cage 14 and arranged in a circle around the central axis 1 Surround support ring 3, which rotatably arranged parallel to the central axis 1 rollers 7 or Has rollers or balls that from the hollow cylindrical inside of the roller cage 14 protrude in the direction of the sliding guide 11.
  • the plungers 5 have guide surfaces 6 on their outward-facing surface, which pressed by the rotating rollers 7 against a spring bias in the direction of the central axis are so that both plunger 5 and 4 dies when the respective roll overflows 7 are pressed or pressed in pulses in the direction of the central axis 1.
  • FIG. 1a there are those along the symbolically labeled Y.
  • the dies 4 can each be moved diametrically towards one another in the direction 8 and the Surface of the workpiece 2 (semi-finished product) by means of a pulsed hammer blow or Press stroke can edit.
  • roller 7 After rotation of the roller cage 14 by 60 °, none of the die pairs 4 are moved in the Y direction Pressing force exerted by roller 7, while roller 7 now tappets along the X direction 5 and 4 dies in opposite directions along the X axis, so that the dies 4 can now machine the surfaces along the X axis.
  • spacer elements 9 also provide wedge-shaped spacer elements that can be moved along the central axis Have wedge surfaces so that a continuous adjustment of the profile is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP99103372A 1998-03-06 1999-02-22 Procédé de rétreindre de pièces Withdrawn EP0940201A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19809674A DE19809674A1 (de) 1998-03-06 1998-03-06 Verfahren zum Profilkneten von Werkstücken
DE19809674 1998-03-06

Publications (2)

Publication Number Publication Date
EP0940201A2 true EP0940201A2 (fr) 1999-09-08
EP0940201A3 EP0940201A3 (fr) 2001-04-18

Family

ID=7859978

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99103372A Withdrawn EP0940201A3 (fr) 1998-03-06 1999-02-22 Procédé de rétreindre de pièces

Country Status (3)

Country Link
US (1) US6094962A (fr)
EP (1) EP0940201A3 (fr)
DE (1) DE19809674A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6722174B1 (en) * 1999-03-10 2004-04-20 Nkk Corporation Device and method for manufacturing hot-rolled sheet steel and device and method for sheet thickness pressing used for the device and method
DE10302211B4 (de) * 2003-01-22 2006-02-02 Zf Sachs Ag Schwingungsdämpfer
DE10341716B4 (de) * 2003-03-25 2009-12-24 Forschungsgesellschaft Umformtechnik Mbh Vorrichtung zum radialen Umformen von stab-, rohr- oder drahtförmigen Werkstücken
DE102021203374A1 (de) * 2021-04-06 2022-10-06 Magna powertrain gmbh & co kg Verfahren zur Herstellung einer Polygonwelle

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE477951C (de) * 1929-06-17 Hasenclever Akt Ges Maschf Rollenhammermaschine
GB191411929A (en) * 1914-05-14 1914-11-05 Robert Holland Improvements in Grooving Apparatus for Tubes and the like.
GB681986A (en) * 1948-08-14 1952-11-05 Nat Res Dev Improvements relating to forging machines
GB682031A (en) * 1949-10-25 1952-11-05 Nat Res Dev Improvements relating to forging machines
DE916487C (de) * 1951-11-10 1954-08-23 Georg Welsch Antrieb fuer Haemmermaschinen
US2790188A (en) * 1953-04-27 1957-04-30 Fray Victor Hill Method of and apparatus for forming polygonal articles
DE1087877B (de) * 1956-07-31 1960-08-25 Kocks Gmbh Friedrich Vorrichtung zum Streckschmieden von block- oder stabfoermigem Gut
US3149509A (en) * 1961-04-26 1964-09-22 Fenn Mfg Company Swaging machine
US3183704A (en) * 1963-03-29 1965-05-18 Stevens & Bullivant Ltd Rotary swaging and forging machines
DE1527471A1 (de) * 1965-07-15 1969-08-21 Langensiepen Kg M Verfahren zum Herstellen von profilierten stabfoermigen Werkstuecken,insbesondere von Spiralbohrern
HUT45388A (en) * 1986-12-12 1988-07-28 Medicor Muevek Method and apparatus for warming firstly babies by heat radiation
US5162038A (en) * 1989-12-04 1992-11-10 Hill-Rom Company Infant warmer open bed
GB9214380D0 (en) * 1992-07-07 1992-08-19 Sev Furnaces Ltd Radiation transmitting apparatus

Also Published As

Publication number Publication date
EP0940201A3 (fr) 2001-04-18
DE19809674A1 (de) 1999-09-09
US6094962A (en) 2000-08-01

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