EP0356375A3 - Method of cold pressing a conical exterior screw thread - Google Patents

Method of cold pressing a conical exterior screw thread Download PDF

Info

Publication number
EP0356375A3
EP0356375A3 EP19890810017 EP89810017A EP0356375A3 EP 0356375 A3 EP0356375 A3 EP 0356375A3 EP 19890810017 EP19890810017 EP 19890810017 EP 89810017 A EP89810017 A EP 89810017A EP 0356375 A3 EP0356375 A3 EP 0356375A3
Authority
EP
European Patent Office
Prior art keywords
dies
thread
pressed
workpiece
conical
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
EP19890810017
Other languages
German (de)
French (fr)
Other versions
EP0356375A2 (en
EP0356375B1 (en
Inventor
Urs Kellner
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.)
BBR Bauverfahren AG
Original Assignee
BBR Bauverfahren 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 BBR Bauverfahren AG filed Critical BBR Bauverfahren AG
Priority to AT89810017T priority Critical patent/ATE102855T1/en
Publication of EP0356375A2 publication Critical patent/EP0356375A2/en
Publication of EP0356375A3 publication Critical patent/EP0356375A3/en
Application granted granted Critical
Publication of EP0356375B1 publication Critical patent/EP0356375B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/56—Making machine elements screw-threaded elements

Abstract

The process is carried out using a press tool which has a plurality of dies which are arranged around a longitudinal axis and are radially displaceable with respect to this axis. The radially inner surfaces of the dies correspond to segments of the conical thread to be pressed. During pressing of a conical thread in cylindrical workpiece, the dies are first drawn apart in the radial direction and the workpiece is then pushed between the dies, along a length which corresponds to only a few thread turns. The dies are then pressed toward one another in order to press into the workpiece a short conical thread in which only the first thread turn may be formed to its full depth. After the dies have been drawn apart, the workpiece is displaced between the dies through a further length which once again corresponds to only a few thread turns. When the dies are pressed toward one another again, the previously pressed thread turns are pressed deep into the workpiece and additional thread turns are formed. This process is repeated several times until the conical thread has been pressed to the predetermined total length.
EP89810017A 1988-08-26 1989-01-11 Method of cold pressing a conical exterior screw thread Expired - Lifetime EP0356375B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810017T ATE102855T1 (en) 1988-08-26 1989-01-11 PROCESS FOR COLD PRESSING A TAPERED EXTERNAL THREAD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3190/88 1988-08-26
CH3190/88A CH676564A5 (en) 1988-08-26 1988-08-26

Publications (3)

Publication Number Publication Date
EP0356375A2 EP0356375A2 (en) 1990-02-28
EP0356375A3 true EP0356375A3 (en) 1991-01-16
EP0356375B1 EP0356375B1 (en) 1994-03-16

Family

ID=4250591

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810017A Expired - Lifetime EP0356375B1 (en) 1988-08-26 1989-01-11 Method of cold pressing a conical exterior screw thread

Country Status (6)

Country Link
US (1) US4941341A (en)
EP (1) EP0356375B1 (en)
AT (1) ATE102855T1 (en)
CA (1) CA1318990C (en)
CH (1) CH676564A5 (en)
DE (1) DE58907213D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5836197A (en) * 1996-12-16 1998-11-17 Mckee Machine Tool Corp. Integral machine tool assemblies
DE102007062830B4 (en) 2007-12-21 2014-11-27 Ifm Electronic Gmbh Method and device for producing a thread and component and device
DE112008003741A5 (en) 2007-12-21 2010-11-25 Ifm Electronic Gmbh Method and device for producing a thread and component and device
KR101894848B1 (en) * 2014-02-28 2018-09-05 현대자동차주식회사 Austenitic heat-resistant alloy and method of manufacturing the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2652577A (en) * 1946-04-27 1953-09-22 Bulloneria E Viteria Italiana Machine for producing articles from blank stock
US3154978A (en) * 1962-07-09 1964-11-03 United Wire & Supply Corp Tube pointer
US3370451A (en) * 1965-06-28 1968-02-27 Blaw Knox Co Apparatus and method for pointing tubes
US3417598A (en) * 1966-08-19 1968-12-24 Manco Mfg Co Apparatus for pointing work pieces
EP0187623A1 (en) * 1985-01-10 1986-07-16 Urs Kellner Apparatus for cold-pressing a tapered thread

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US408294A (en) * 1889-08-06 Swag ing-machine
US228033A (en) * 1880-05-25 Device for swaging screw-threads on eyebolts
US859803A (en) * 1906-03-28 1907-07-09 Cummings Machine Company Threaded tube.
US1466302A (en) * 1920-04-26 1923-08-28 Jouve Felix Louis Machine for swaging or reducing metal
US1712108A (en) * 1926-10-01 1929-05-07 Robert A Goeller Connecter
US2160694A (en) * 1936-07-09 1939-05-30 Thomas & Betts Corp Wire connector
US2225345A (en) * 1938-09-17 1940-12-17 Bendix Aviat Corp Banding press
US4751839A (en) * 1980-05-09 1988-06-21 Ltv Steel Company, Inc. Method for removing certain of the corrugations in a helically corrugated pipe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2652577A (en) * 1946-04-27 1953-09-22 Bulloneria E Viteria Italiana Machine for producing articles from blank stock
US3154978A (en) * 1962-07-09 1964-11-03 United Wire & Supply Corp Tube pointer
US3370451A (en) * 1965-06-28 1968-02-27 Blaw Knox Co Apparatus and method for pointing tubes
US3417598A (en) * 1966-08-19 1968-12-24 Manco Mfg Co Apparatus for pointing work pieces
EP0187623A1 (en) * 1985-01-10 1986-07-16 Urs Kellner Apparatus for cold-pressing a tapered thread

Also Published As

Publication number Publication date
EP0356375A2 (en) 1990-02-28
US4941341A (en) 1990-07-17
DE58907213D1 (en) 1994-04-21
ATE102855T1 (en) 1994-04-15
CA1318990C (en) 1993-06-15
EP0356375B1 (en) 1994-03-16
CH676564A5 (en) 1991-02-15

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