EP1379341B8 - Method of manufacturing a closed profile - Google Patents

Method of manufacturing a closed profile Download PDF

Info

Publication number
EP1379341B8
EP1379341B8 EP01967907A EP01967907A EP1379341B8 EP 1379341 B8 EP1379341 B8 EP 1379341B8 EP 01967907 A EP01967907 A EP 01967907A EP 01967907 A EP01967907 A EP 01967907A EP 1379341 B8 EP1379341 B8 EP 1379341B8
Authority
EP
European Patent Office
Prior art keywords
closed profile
manufacturing
profile
closed
alloyed
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
EP01967907A
Other languages
German (de)
French (fr)
Other versions
EP1379341B1 (en
EP1379341A1 (en
Inventor
Leif Carlsson
Hans Groth
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.)
Outokumpu Stainless AB
Original Assignee
Outokumpu Stainless AB
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 Outokumpu Stainless AB filed Critical Outokumpu Stainless AB
Publication of EP1379341A1 publication Critical patent/EP1379341A1/en
Application granted granted Critical
Publication of EP1379341B1 publication Critical patent/EP1379341B1/en
Publication of EP1379341B8 publication Critical patent/EP1379341B8/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
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/065—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes starting from a specific blank, e.g. tailored blank
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • 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
    • C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
    • C21D7/12—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars by expanding tubular bodies
    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • 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
    • C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
    • 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
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/10—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies

Definitions

  • a method and a device for manufacturing of a closed profile and a profile manufactured according to said method are described in detail in detail in detail.
  • the present invention relates to a method and device for manufacturing a closed profile, for example in the form of a pipe in a profile structure and a closed profile, for example in the form of a pipe, manufactured according to the method.
  • the object of the present invention is to provide a method and device for manufacturing a closed profile in a profile structure, for example a pipe that is constituted by iron and alloyed to provide a strong strain hardening during plastic cold forming in combination with maintaining a good ductility of the alloy at the same time as the pipe achieves a yield point of above 1000 MPa as the final product.
  • a profile structure for example a pipe that is constituted by iron and alloyed to provide a strong strain hardening during plastic cold forming in combination with maintaining a good ductility of the alloy at the same time as the pipe achieves a yield point of above 1000 MPa as the final product.
  • Another object of the invention is that the closed profile is manufactured according to a method through hydroforming and/or mechanical treatment of the same, to provide a strategically varying wall thickness axially and/or in the cross-section of the profile.
  • a method and device for manufacturing a closed profile in a profile structure and a closed profile manufactured according to the method have now been provided that in an excellent manner fulfil their purposes at the same time as the manufacture can take place very rationally and at low cost.
  • the profile which is manufactured according to the invention, with varying wall thickness and/or diameter the weight of the profile can be reduced to more than half the weight of profiles in previously known construction solutions. Examples of such solutions may be different girders and frame structures in cars and other means of conveyance and also other components where closed profiles, for example in the form of pipes, may be incorporated.
  • the closed profile is constituted for example in the form of a pipe that is manufactured from a metal material of iron, which is alloyed with chromium, nickel and carbon in predetermined proportions.
  • the iron is alloyed with 17% chromium, 7% nickel and 0,1% carbon or closely related alloys, wherein a strong strain hardening is obtained when plastically cold forming the profile in combination with maintaining a good ductility of the alloy.
  • the alloyed metal material forming the profile is for example formed through hydroforming and/or through ballooning preferably by means of a mandrel with a cylindrical or other shape or through shrinking or elongation, preferably through elongation with or without a matrix, in order to increase the yield point of the metal material from an original, low yield point of about 300 MPa to a final product that completely or partially obtains a yield point of more than about 1000 MPa.
  • a closed profile in which a closed profile is manufactured with varying diameter
  • the pipe is expanded along half its length to a diameter of 60 mm, wherein the wall thickness of the pipe is decreased to about 1.5 mm along said half of the pipe and the yield point of the pipe can be increased to 1000 MPa or more at the same time as the other half of the pipe is left untreated.
  • the wall thickness and/or the circumference of the final closed profile may also be varied axially by applying two or more profiles partially into each other with the short profile external on the longer profile.
  • the wall thickness and/or the circumference may be varied further after the forming of the closed profile by using welding to join so called starting profiles with walls of different thickness and/or with different diameters.
  • the wall thickness may be varied in the same cross-section, so that the material will be strategically placed just over the areas where an expected maximum strain may take place.
  • As starting material for the closed profile according to the invention a metal material of the above-mentioned alloy having low strength is used.
  • the profile described in the application intended to be incorporated in a current profile structure may be constituted by any closed profile design intended to be incorporated in the current profile structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Heat Treatment Of Articles (AREA)
  • Forging (AREA)
  • Prostheses (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Ceramic Products (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

The invention relates to a method and device for manufacturing a closed profile in a profile structure and a closed profile manufactured according to the method. The closed profile used and constituted by a metal material of iron, alloyed with chromium, nickel and carbon in predetermined proportions is plastically formed, wherein a strong strain hardening of the closed profile is obtained.
EP01967907A 2000-10-10 2001-09-19 Method of manufacturing a closed profile Expired - Lifetime EP1379341B8 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0003655 2000-10-10
SE0003655A SE0003655D0 (en) 2000-10-10 2000-10-10 Method and apparatus for manufacturing a single tube structure comprising tubes and a tube manufactured in accordance with the method
PCT/SE2001/002005 WO2002030585A1 (en) 2000-10-10 2001-09-19 A method and a device for manufacturing of a closed profile and a profile manufactured according to said method

Publications (3)

Publication Number Publication Date
EP1379341A1 EP1379341A1 (en) 2004-01-14
EP1379341B1 EP1379341B1 (en) 2006-01-25
EP1379341B8 true EP1379341B8 (en) 2006-05-03

Family

ID=20281361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01967907A Expired - Lifetime EP1379341B8 (en) 2000-10-10 2001-09-19 Method of manufacturing a closed profile

Country Status (8)

Country Link
US (1) US20040031309A1 (en)
EP (1) EP1379341B8 (en)
AT (1) ATE316428T1 (en)
AU (1) AU2001288189A1 (en)
DE (1) DE60116885T2 (en)
ES (1) ES2257439T3 (en)
SE (1) SE0003655D0 (en)
WO (1) WO2002030585A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10214473A1 (en) * 2002-03-30 2003-10-23 Bayerische Motoren Werke Ag Cross member between two lateral edge areas of a vehicle door
WO2019028157A1 (en) * 2017-08-01 2019-02-07 Ak Steel Properties, Inc. Manufacturing ultra-high strength load bearing parts using high strength/low initial yield steels through tubular hydroforming process

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2762326A (en) * 1954-12-28 1956-09-11 Keystone Brass Works Inc Method for forming t-fitting
US3093519A (en) * 1961-01-03 1963-06-11 Int Nickel Co Age-hardenable, martensitic iron-base alloys
FR2369027A1 (en) * 1976-10-29 1978-05-26 Tubes Cie Indle Cale TUBULAR PART OF WHICH DIAMETERS AND THICKNESSES ARE NOT CONSTANT THROUGHOUT THEIR LENGTH
JPS5669359A (en) * 1979-10-16 1981-06-10 Kobe Steel Ltd Composite structure type high strength cold rolled steel sheet
US4567743A (en) * 1985-03-19 1986-02-04 Standard Tube Canada Inc. Method of forming box-section frame members
US4649728A (en) * 1985-04-23 1987-03-17 The Babcock & Wilcox Company Integral joint forming of work-hardenable high alloy tubing
EP0411515B1 (en) * 1989-07-31 1993-09-08 Mitsubishi Jukogyo Kabushiki Kaisha High strength heat-resistant low alloy steels
US5481892A (en) * 1989-08-24 1996-01-09 Roper; Ralph E. Apparatus and method for forming a tubular member
US5333775A (en) * 1993-04-16 1994-08-02 General Motors Corporation Hydroforming of compound tubes
DE19510299A1 (en) * 1995-03-22 1996-09-26 Porsche Ag Frame for motor vehicles
US5522246A (en) * 1995-04-19 1996-06-04 U.S. Manufacturing Corporation Process for forming light-weight tublar axles
BR9806104A (en) * 1997-06-26 1999-08-31 Kawasaki Steel Co Superfine granulation steel tube and process for its production.
US6484384B1 (en) * 1998-12-31 2002-11-26 Spicer Driveshaft, Inc. Method of manufacturing an axially collapsible driveshaft assembly
US6609301B1 (en) * 1999-09-08 2003-08-26 Magna International Inc. Reinforced hydroformed members and methods of making the same

Also Published As

Publication number Publication date
ATE316428T1 (en) 2006-02-15
SE0003655D0 (en) 2000-10-10
DE60116885T2 (en) 2006-09-14
ES2257439T3 (en) 2006-08-01
WO2002030585A1 (en) 2002-04-18
DE60116885D1 (en) 2006-04-13
AU2001288189A1 (en) 2002-04-22
EP1379341B1 (en) 2006-01-25
US20040031309A1 (en) 2004-02-19
EP1379341A1 (en) 2004-01-14

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