EP1379341B1 - Verfahren zur herstellung eines geschlossenen profils - Google Patents
Verfahren zur herstellung eines geschlossenen profils Download PDFInfo
- Publication number
- EP1379341B1 EP1379341B1 EP01967907A EP01967907A EP1379341B1 EP 1379341 B1 EP1379341 B1 EP 1379341B1 EP 01967907 A EP01967907 A EP 01967907A EP 01967907 A EP01967907 A EP 01967907A EP 1379341 B1 EP1379341 B1 EP 1379341B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- profile
- forming operation
- yield point
- temperature
- closed profile
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes 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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes 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, bars, wire, tubes 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 by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
Definitions
- the present invention relates to a method for manufacturing a closed profile, for example in the form of a pipe in a profile structure.
- US 4 649 728 shows integral joint forming of work-hardenable high alloy tubing.
- a pre-form tube is cold forged or cold rolled from the outside using a counterstay within the tube in order to increase the strength along substantially its entire length and substantially uniformly.
- a profile material is not chosen or the manufacturing process is not controlled so that you achieve any substantial strategical variations in thickness of the material of the final product.
- a profile material is not chosen or the manufacturing process is not controlled so that you achieve any substantial strategical variations in thickness of the material of the final product.
- the object of the present invention is to provide a method 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 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, 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 formed through hydroforming and/or through expanding preferably by means of a mandrel with a cylindrical or other shape or through shrinking through axial elongation by pulling 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 material in the profile is cooled to or is kept at a controlled temperature before and during the forming operation to achieve a controlled, maximal strength independently of the degree of deformation during the forming operation.
- the temperature that the material is cooled to or the temperature that is maintained during the forming operation is -196° ⁇ T ⁇ 70°C.
- the final product is cooled to or is kept at a controlled temperature for achieving a controlled maximal strength independently of the degree of deformation during the forming operation.
- the temperature that the final product is cooled to or the temperature that is maintained during a limited time after the forming operation is -196° ⁇ T ⁇ 70°C.
- 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)
- Ceramic Products (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Prostheses (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Claims (9)
- Verfahren zur Herstellung eines geschlossenen Profils, bei dem das ursprünglich benutzte metallene Werkstück aus Eisen besteht, das mit Chrom, Nickel und Kohlenstoff in vorbestimmten Anteilen legiert wurde, mit anschließender plastischer Kaltverformung des geschlossenen Profils,
gekennzeichnet durch,
Kaltverformung mittels Hydroformung und/oder durch Expandieren, insbesondere mittels einer Spindel mit geeigneter Form, oder durch Schrumpfen mittels axialer Elongation mittels Ziehen mit oder ohne einer Matrize, zur Erhöhung der Streckgrenze des metallenen Materials von einer ursprünglich niedrigen Streckgrenze zu einem Endprodukt, das vollständig oder teilweise eine hohe Streckgrenze erhält. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass
das metallene Material aus Eisen in Form eines geschlossenen Profils, das plastisch bearbeitet wurde, mit 17% Chrom, 7% Nickel und 0,1% Kohlenstoff legiert ist. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass
sich die ursprünglich niedrige Streckgrenze auf etwa 300 MPa bemisst und die hohe Streckgrenze bevorzugt gleich oder größer ist als 1.000 MPa. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass
sich die Wandstärke des endgültigen geschlossenen Profils axial verändert, indem zwei oder mehrere Profile teilweise ineinander angeordnet werden, indem die kürzeren Profile außerhalb an den längeren Profilen angebracht sind, indem Profile mit unterschiedlichen Wandstärken und/oder unterschiedlichen Durchmessern mittels Schweißen vor der Formbehandlung miteinander verbunden werden oder indem die Wandstärke in demselben Querschnitt verändert wird, um eine strategische Anordnung des profilierten Materials und um eine Optimierung der Festigkeit zu erreichen. - Verfahren nach Anspruch 1 oder 4,
dadurch gekennzeichnet, dass
die Festigkeit des endgültigen Profils in unterschiedlichen Bereichen des Profils verändert wird, indem das Material teilweise mehr oder weniger ausgezogen wird. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
das Material in dem Profil auf einer geregelten Temperatur gehalten wird oder auf diese abgekühlt wird, bevor oder während der Formung, um eine kontrollierte maximale Festigkeit zu erhalten, unabhängig vom Grad der Deformation während der Formung. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die Temperatur, auf die das Material herabgekühlt wird, oder die Temperatur, die eingehalten wird während der Formung, -196° ≤ T ≤ 70° C ist. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
das endgültige Produkt auf eine geregelte Temperatur herabgekühlt wird oder auf dieser gehalten wird, um eine kontrollierte maximale Festigkeit zu erreichen, unabhängig vom Grad der Deformation während der Formung. - Verfahren nach Anspruch 8,
dadurch gekennzeichnet, dass
die Temperatur, auf die das endgültige Produkt heruntergekühlt wird, oder die Temperatur, die während einer limitierten Zeit nach der Formung eingehalten wird, -196° ≤ T ≤ 70° C ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0003655 | 2000-10-10 | ||
SE0003655A SE0003655D0 (sv) | 2000-10-10 | 2000-10-10 | Förfarande och anordning för tillverkning av ett ien rörkonstruktion ingående rör samt ett rör tillverkat enligt förfarandet |
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 (de) | 2004-01-14 |
EP1379341B1 true EP1379341B1 (de) | 2006-01-25 |
EP1379341B8 EP1379341B8 (de) | 2006-05-03 |
Family
ID=20281361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01967907A Expired - Lifetime EP1379341B8 (de) | 2000-10-10 | 2001-09-19 | Verfahren zur herstellung eines geschlossenen profils |
Country Status (8)
Country | Link |
---|---|
US (1) | US20040031309A1 (de) |
EP (1) | EP1379341B8 (de) |
AT (1) | ATE316428T1 (de) |
AU (1) | AU2001288189A1 (de) |
DE (1) | DE60116885T2 (de) |
ES (1) | ES2257439T3 (de) |
SE (1) | SE0003655D0 (de) |
WO (1) | WO2002030585A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10214473A1 (de) * | 2002-03-30 | 2003-10-23 | Bayerische Motoren Werke Ag | Querträger zwischen zwei seitlichen Randbereichen einer Fahrzeugtür |
TW201919788A (zh) * | 2017-08-01 | 2019-06-01 | 美商Ak鋼鐵資產公司 | 使用高強度/低初始屈服鋼藉由管狀液壓成形法製造超高強度承載件 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0924312A1 (de) * | 1997-06-26 | 1999-06-23 | Kawasaki Steel Corporation | Stahlrohr mit ultrafeinem gefüge und verfahren zu dessen herstellung |
Family Cites Families (13)
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 (fr) * | 1976-10-29 | 1978-05-26 | Tubes Cie Indle Cale | Piece tubulaire dont les diametres et les epaisseurs ne sont pas constants sur toute leur longueu |
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 (de) * | 1989-07-31 | 1993-09-08 | Mitsubishi Jukogyo Kabushiki Kaisha | Hochfeste, hitzebeständige, niedrig legierte Stähle |
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 (de) * | 1995-03-22 | 1996-09-26 | Porsche Ag | Aufbaustruktur für Kraftfahrzeuge |
US5522246A (en) * | 1995-04-19 | 1996-06-04 | U.S. Manufacturing Corporation | Process for forming light-weight tublar axles |
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 |
-
2000
- 2000-10-10 SE SE0003655A patent/SE0003655D0/xx unknown
-
2001
- 2001-09-19 DE DE60116885T patent/DE60116885T2/de not_active Expired - Lifetime
- 2001-09-19 ES ES01967907T patent/ES2257439T3/es not_active Expired - Lifetime
- 2001-09-19 WO PCT/SE2001/002005 patent/WO2002030585A1/en active IP Right Grant
- 2001-09-19 US US10/398,555 patent/US20040031309A1/en not_active Abandoned
- 2001-09-19 AU AU2001288189A patent/AU2001288189A1/en not_active Abandoned
- 2001-09-19 EP EP01967907A patent/EP1379341B8/de not_active Expired - Lifetime
- 2001-09-19 AT AT01967907T patent/ATE316428T1/de not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0924312A1 (de) * | 1997-06-26 | 1999-06-23 | Kawasaki Steel Corporation | Stahlrohr mit ultrafeinem gefüge und verfahren zu dessen herstellung |
Also Published As
Publication number | Publication date |
---|---|
ATE316428T1 (de) | 2006-02-15 |
US20040031309A1 (en) | 2004-02-19 |
SE0003655D0 (sv) | 2000-10-10 |
EP1379341A1 (de) | 2004-01-14 |
DE60116885D1 (de) | 2006-04-13 |
WO2002030585A1 (en) | 2002-04-18 |
EP1379341B8 (de) | 2006-05-03 |
AU2001288189A1 (en) | 2002-04-22 |
ES2257439T3 (es) | 2006-08-01 |
DE60116885T2 (de) | 2006-09-14 |
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