DE59807656D1 - Method of making coil springs - Google Patents

Method of making coil springs

Info

Publication number
DE59807656D1
DE59807656D1 DE59807656T DE59807656T DE59807656D1 DE 59807656 D1 DE59807656 D1 DE 59807656D1 DE 59807656 T DE59807656 T DE 59807656T DE 59807656 T DE59807656 T DE 59807656T DE 59807656 D1 DE59807656 D1 DE 59807656D1
Authority
DE
Germany
Prior art keywords
shot peening
coil springs
making coil
steps
helical springs
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 - Lifetime
Application number
DE59807656T
Other languages
German (de)
Inventor
Josef Wienand
Gerhard Mier
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.)
ThyssenKrupp Technologies AG
Original Assignee
ThyssenKrupp Automotive 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 ThyssenKrupp Automotive AG filed Critical ThyssenKrupp Automotive AG
Application granted granted Critical
Publication of DE59807656D1 publication Critical patent/DE59807656D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/02—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/30—Stress-relieving

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Springs (AREA)
  • Wire Processing (AREA)
  • Steroid Compounds (AREA)

Abstract

Production of helical springs made of steel wire comprises subjecting the helical springs to thermomechanical boundary layer reinforcement and first and second shot peening steps. The steps of the first shot peening stage is carried out without pre-tension followed by thermal drop in pressure and then the second shot peening stage.
DE59807656T 1998-10-02 1998-10-02 Method of making coil springs Expired - Lifetime DE59807656D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98118691A EP0990708B1 (en) 1998-10-02 1998-10-02 Process for producing coil springs

Publications (1)

Publication Number Publication Date
DE59807656D1 true DE59807656D1 (en) 2003-04-30

Family

ID=8232743

Family Applications (1)

Application Number Title Priority Date Filing Date
DE59807656T Expired - Lifetime DE59807656D1 (en) 1998-10-02 1998-10-02 Method of making coil springs

Country Status (5)

Country Link
EP (1) EP0990708B1 (en)
AT (1) ATE235567T1 (en)
DE (1) DE59807656D1 (en)
ES (1) ES2190562T3 (en)
PT (1) PT990708E (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104690495A (en) * 2013-12-05 2015-06-10 上海中国弹簧制造有限公司 Manufacturing process of high-stress suspension spring
CN104960996B (en) * 2015-06-23 2017-10-03 宋锦程 Collating unit for steel wire rope
CN113510444A (en) * 2021-05-18 2021-10-19 福建永动力弹簧科技有限公司 Auger spring production process

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1109561B (en) * 1959-04-03 1961-06-22 Gen Motors Corp Process for increasing the fatigue strength of metals
JP2994508B2 (en) * 1991-11-26 1999-12-27 株式会社東郷製作所 Manufacturing method of coil spring
DE4330832C2 (en) * 1993-09-11 1996-04-04 Hoesch Federn Gmbh Process for optimizing the residual stress distribution in the cross-section of compression springs
JP3173756B2 (en) * 1994-07-28 2001-06-04 株式会社東郷製作所 Manufacturing method of coil spring

Also Published As

Publication number Publication date
EP0990708A1 (en) 2000-04-05
ES2190562T3 (en) 2003-08-01
PT990708E (en) 2003-06-30
ATE235567T1 (en) 2003-04-15
EP0990708B1 (en) 2003-03-26

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition