US20080035628A1 - Production of Ihpf Components Having a Flange - Google Patents

Production of Ihpf Components Having a Flange Download PDF

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Publication number
US20080035628A1
US20080035628A1 US10/577,405 US57740504A US2008035628A1 US 20080035628 A1 US20080035628 A1 US 20080035628A1 US 57740504 A US57740504 A US 57740504A US 2008035628 A1 US2008035628 A1 US 2008035628A1
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US
United States
Prior art keywords
flange
hollow profile
high pressure
internal high
initial
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.)
Abandoned
Application number
US10/577,405
Inventor
Kai-Uwe Dudziak
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.)
Daimler AG
Original Assignee
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Assigned to DAIMLERCHRYSLER AG reassignment DAIMLERCHRYSLER AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DUDZIAK, KAI-UWE
Publication of US20080035628A1 publication Critical patent/US20080035628A1/en
Abandoned legal-status Critical Current

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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
    • B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
    • 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
    • B21C37/14—Making tubes from double flat material
    • 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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • 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

Definitions

  • This invention relates to a method of producing a hollow profile having at least one flange by means of internal high pressure forming.
  • German document DE 10130794 A1 discloses an extruded profile which has a flange and is subsequently subjected to internal high pressure forming, the course and the direction of the flange over the length of the structural part not being established in a dimensionally accurate manner until during deformation according to the internal high pressure process.
  • an extruded hollow profile having a flange generally has the disadvantage that the hollow profile can only be bent and/or widened with difficulty.
  • the reason for this is that the connecting point of the flange on the hollow profile acts like a tension rod against the forming force.
  • the flange cannot expand sufficiently and therefore the hollow profile cannot be formed in a controlled manner.
  • German document DE 19905365 A1 It is known from German document DE 19905365 A1 to produce a hollow profile having a flange by roll forming from a sheet-metal blank. The hollow profile is then subsequently subjected to internal high pressure forming.
  • the flange is established beforehand in such a way that its position and dimensions are not formed until during the internal high pressure forming.
  • such a method is complicated in its implementation inasmuch as that portion of the flange on the initial hollow profile which is to be deformed during the internal high pressure forming has to be accurately established or calculated as a function of the holding-down force for the flange on the one hand and the internal high pressure to be applied on the other hand.
  • the hollow profile shown in this publication has the disadvantage that the initial hollow profile has sharp edges, which, on account of the pronounced hardening during the profile production process, can remain behind as visible residual edges or undulations on the final finished hollow profile produced by the IHPF process.
  • the bending-back or stretching of such profile edges, hardened to a pronounced extent, cannot be completely taken into account in the IHPF process.
  • the object of the present invention is to provide a method of producing a hollow profile by means of which a hollow profile having at least one flange can be produced in a simple and controlled manner.
  • the method is distinguished by the fact that an initial hollow profile consists of a single sheet, at least one flange being formed in the longitudinal direction of the initial hollow profile likewise by corresponding folding or roll forming of the sheet.
  • the sheet can be produced in particular from a sheet-metal blank and/or a roll-formed sheet unwound from the coil.
  • the joint location of the sheet is welded and the closed initial hollow profile is inserted into an internal high pressure forming (IHPF) tool.
  • IHPF internal high pressure forming
  • the at least one flange is positioned in a corresponding cavity in the IHPF tool and is clamped in place with a defined holding-down force during the internal high pressure forming.
  • the inner contour of the IHPF tool, on the one hand, and the holding-down force to be applied on the flange during the internal high pressure forming, on the other hand, are selected in such a way that the position of the flange always remains unchanged relative to the finished hollow profile then formed.
  • the flange can be produced in different ways during the folding or roll forming of the sheet.
  • the flange prefferably be formed by doubling of the material of the sheet during the folding or roll forming, that is to say the sheet is folded over or roll-formed, with the flange being formed.
  • Another possibility is to fold or roll-form the sheet in such a way that the two ends of the sheet form an overlapping joint for forming the flange.
  • the sheet it is also possible for the sheet to be folded or roll-formed at one end, with the flange being formed, and for the other end, during the folding or roll-forming, to be formed in such a way that it abuts against the transition region between the flange and the initial hollow profile.
  • the sheet is welded together in the region of its free ends. Since these free ends can lie in the region of the flange or outside this region, welding is carried out there in each case.
  • the weld is at any rate located outside the flange region in the initial hollow profile.
  • Hollow profiles produced by the method according to the invention are suitable, for example, for use in body construction as roof frames, side sills, transverse members or longitudinal and transverse members in the body floor assembly, in which case the adjacent body components can then be attached to the flange by conventional joining processes, such as resistance spot welding for example.
  • FIG. 1 schematically shows an IHPF tool with a flange clamped in place
  • FIGS. 2 a and 2 b show an initial hollow profile with different positions of the weld
  • FIG. 3 shows a further initial hollow profile with a single flange
  • FIGS. 4 a and 4 b respectively show an initial hollow profile with a weld outside the flange region.
  • FIG. 1 Shown schematically in FIG. 1 is an IHPF tool 1 which consists of a top part 2 and a bottom part 3 . Both parts 2 and 3 form a cavity 4 , which corresponds to the contour of the final finished hollow profile.
  • a sheet-metal blank formed into an initial hollow profile 5 is inserted into this cavity 4 .
  • the initial hollow profile 5 has a flange 6 , which is clamped in place in a corresponding section 7 of the cavity 4 .
  • the clamping in place can be effected with such a holding-down force that either no subsequent flow of material can take place from the region of the flange 6 into the finished hollow profile or such a subsequent flow of material is allowed.
  • FIGS. 2 a and 2 b show an initial hollow profile 5 in which a flange 8 is formed by an overlapping joint of the free ends of the sheet.
  • the flange 8 can then be welded either by a weld 9 being provided in the joint region of the flange 8 ( FIG. 2 a ) or by a weld 9 being provided in the course of the flange 8 transversely to the latter ( FIG. 2 b ).
  • FIG. 3 shows an initial hollow profile 5 in which the flange 10 is formed by a free end of the sheet being appropriately bent over and by the other free end being welded on in the transition region between the flange 10 and the initial hollow profile 5 .
  • a further possibility consists in forming a flange 11 of the initial hollow profile 5 in such a way that the sheet is folded over and thus overlaps in the region provided for the flange 11 .
  • This is shown by way of example in FIG. 4 a for a single flange 11 and in FIG. 4 b for two flanges 11 .
  • the weld 9 is located outside the flange in the region of the initial hollow profile 5 .
  • Such an initial hollow profile with a weld 9 established outside the flange region is preferably to be used when a subsequent flow of material from the region of the flange 11 during the internal high pressure forming is to be permitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The present invention relates to a method of producing a hollow profile which has at least one flange by internal high pressure forming. During the internal high pressure forming, the dimensions and the position of the flange are not changed relative to the finished hollow profile then formed.

Description

    BACKGROUND AND SUMMARY OF THE INVENTION
  • This invention relates to a method of producing a hollow profile having at least one flange by means of internal high pressure forming.
  • Conventional hollow profiles with flanges are generally produced by extrusion. In automobile construction, the flange is required in order to fasten the hollow profile, produced by extrusion for example, to further vehicle body parts.
  • German document DE 10130794 A1, for example, discloses an extruded profile which has a flange and is subsequently subjected to internal high pressure forming, the course and the direction of the flange over the length of the structural part not being established in a dimensionally accurate manner until during deformation according to the internal high pressure process.
  • However, an extruded hollow profile having a flange generally has the disadvantage that the hollow profile can only be bent and/or widened with difficulty. The reason for this is that the connecting point of the flange on the hollow profile acts like a tension rod against the forming force. In addition, on account of the accumulation of material at this connecting point, the flange cannot expand sufficiently and therefore the hollow profile cannot be formed in a controlled manner.
  • It is known from German document DE 19905365 A1 to produce a hollow profile having a flange by roll forming from a sheet-metal blank. The hollow profile is then subsequently subjected to internal high pressure forming. In this case, the flange is established beforehand in such a way that its position and dimensions are not formed until during the internal high pressure forming. However, such a method is complicated in its implementation inasmuch as that portion of the flange on the initial hollow profile which is to be deformed during the internal high pressure forming has to be accurately established or calculated as a function of the holding-down force for the flange on the one hand and the internal high pressure to be applied on the other hand. In addition, the hollow profile shown in this publication has the disadvantage that the initial hollow profile has sharp edges, which, on account of the pronounced hardening during the profile production process, can remain behind as visible residual edges or undulations on the final finished hollow profile produced by the IHPF process. The bending-back or stretching of such profile edges, hardened to a pronounced extent, cannot be completely taken into account in the IHPF process.
  • Starting therefrom, the object of the present invention is to provide a method of producing a hollow profile by means of which a hollow profile having at least one flange can be produced in a simple and controlled manner.
  • This object is achieved by a method having the features claimed.
  • The method is distinguished by the fact that an initial hollow profile consists of a single sheet, at least one flange being formed in the longitudinal direction of the initial hollow profile likewise by corresponding folding or roll forming of the sheet. The sheet can be produced in particular from a sheet-metal blank and/or a roll-formed sheet unwound from the coil.
  • Then, in order to form a closed initial hollow profile, the joint location of the sheet is welded and the closed initial hollow profile is inserted into an internal high pressure forming (IHPF) tool. During the insertion, the at least one flange is positioned in a corresponding cavity in the IHPF tool and is clamped in place with a defined holding-down force during the internal high pressure forming.
  • According to the invention, the inner contour of the IHPF tool, on the one hand, and the holding-down force to be applied on the flange during the internal high pressure forming, on the other hand, are selected in such a way that the position of the flange always remains unchanged relative to the finished hollow profile then formed.
  • In this case, it is possible according to the invention to establish the holding-down force in such an order of magnitude that a subsequent flow of material into the finished hollow profile on no account occurs during the internal high pressure forming.
  • Under certain circumstances, however, it may also be desired for such a subsequent flow of material from the flange into the finished hollow profile to be allowed, so that a corresponding holding-down force is to be selected.
  • According to the invention, the flange can be produced in different ways during the folding or roll forming of the sheet.
  • Thus it is possible for the flange to be formed by doubling of the material of the sheet during the folding or roll forming, that is to say the sheet is folded over or roll-formed, with the flange being formed.
  • Another possibility is to fold or roll-form the sheet in such a way that the two ends of the sheet form an overlapping joint for forming the flange.
  • However, it is also possible for the sheet to be folded or roll-formed at one end, with the flange being formed, and for the other end, during the folding or roll-forming, to be formed in such a way that it abuts against the transition region between the flange and the initial hollow profile.
  • In order to form a closed initial hollow profile, the sheet is welded together in the region of its free ends. Since these free ends can lie in the region of the flange or outside this region, welding is carried out there in each case.
  • If a subsequent flow of material from the flange is desired during the internal high pressure forming, the weld is at any rate located outside the flange region in the initial hollow profile.
  • Hollow profiles produced by the method according to the invention are suitable, for example, for use in body construction as roof frames, side sills, transverse members or longitudinal and transverse members in the body floor assembly, in which case the adjacent body components can then be attached to the flange by conventional joining processes, such as resistance spot welding for example.
  • Further advantages and features of the method according to the invention follow from the description below with reference to the attached drawings.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 schematically shows an IHPF tool with a flange clamped in place;
  • FIGS. 2 a and 2 b show an initial hollow profile with different positions of the weld;
  • FIG. 3 shows a further initial hollow profile with a single flange; and
  • FIGS. 4 a and 4 b respectively show an initial hollow profile with a weld outside the flange region.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • Shown schematically in FIG. 1 is an IHPF tool 1 which consists of a top part 2 and a bottom part 3. Both parts 2 and 3 form a cavity 4, which corresponds to the contour of the final finished hollow profile.
  • A sheet-metal blank formed into an initial hollow profile 5 is inserted into this cavity 4. The initial hollow profile 5 has a flange 6, which is clamped in place in a corresponding section 7 of the cavity 4.
  • The clamping in place can be effected with such a holding-down force that either no subsequent flow of material can take place from the region of the flange 6 into the finished hollow profile or such a subsequent flow of material is allowed.
  • By way of example, FIGS. 2 a and 2 b show an initial hollow profile 5 in which a flange 8 is formed by an overlapping joint of the free ends of the sheet. The flange 8 can then be welded either by a weld 9 being provided in the joint region of the flange 8 (FIG. 2 a) or by a weld 9 being provided in the course of the flange 8 transversely to the latter (FIG. 2 b).
  • Furthermore, by way of example, FIG. 3 shows an initial hollow profile 5 in which the flange 10 is formed by a free end of the sheet being appropriately bent over and by the other free end being welded on in the transition region between the flange 10 and the initial hollow profile 5.
  • A further possibility consists in forming a flange 11 of the initial hollow profile 5 in such a way that the sheet is folded over and thus overlaps in the region provided for the flange 11. This is shown by way of example in FIG. 4 a for a single flange 11 and in FIG. 4 b for two flanges 11. In both cases the weld 9 is located outside the flange in the region of the initial hollow profile 5. Such an initial hollow profile with a weld 9 established outside the flange region is preferably to be used when a subsequent flow of material from the region of the flange 11 during the internal high pressure forming is to be permitted.

Claims (4)

1-3. (canceled)
4. A method of producing a hollow profile having at least one flange extending along the hollow profile, comprising:
folding or roll forming an initial hollow profile from a sheet, with at least one flange being formed so as to project from the initial hollow profile by doubling the material of the sheet;
welding a joint location of the initial hollow profile outside a region of the flange; and
internal high pressure forming the initial hollow profile into a finished hollow profile by applying an internal high pressure by means of a fluid into the interior of the initial hollow profile, with the at least one flange being clamped in place in an IHPF tool in such a way that its position and dimensions remain unchanged relative to the finished hollow profile.
5. The method as claimed in claim 4, wherein the at least one flange, when the IHPF tool is closed, is acted upon by a holding-down force which prevents a subsequent flow of material from the flange into the finished hollow profile during internal high pressure forming.
6. The method as claimed in claim 4, wherein the at least one flange, when the IHPF tool is closed, is acted upon by a holding-down force which allows a defined subsequent flow of material from the flange into the finished hollow profile during internal high pressure forming.
US10/577,405 2003-10-28 2004-09-11 Production of Ihpf Components Having a Flange Abandoned US20080035628A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10350145A DE10350145B4 (en) 2003-10-28 2003-10-28 Generation of hydroformed components with flange
DE10350145.2 2003-10-28
PCT/EP2004/010182 WO2005051562A1 (en) 2003-10-28 2004-09-11 Production of ihu components with a flange

Publications (1)

Publication Number Publication Date
US20080035628A1 true US20080035628A1 (en) 2008-02-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
US10/577,405 Abandoned US20080035628A1 (en) 2003-10-28 2004-09-11 Production of Ihpf Components Having a Flange

Country Status (6)

Country Link
US (1) US20080035628A1 (en)
EP (1) EP1680240A1 (en)
JP (1) JP2007533462A (en)
CA (1) CA2543265A1 (en)
DE (1) DE10350145B4 (en)
WO (1) WO2005051562A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100186473A1 (en) * 2007-07-20 2010-07-29 Masaaki Mizumura Method for hydroforming and hydroformed product
US9248490B2 (en) 2011-07-20 2016-02-02 Benteler Automobiltechnik Gmbh Method of manufacturing a tubular structural part, and tubular structural part
CN107716690A (en) * 2017-11-30 2018-02-23 苏州紫荆清远新能源汽车技术有限公司 A kind of shaped device and method of body of a motor car part list seam
CN107952874A (en) * 2017-11-30 2018-04-24 苏州紫荆清远新能源汽车技术有限公司 A kind of molding machine and method of body of a motor car part double stopper
CN113333560A (en) * 2017-03-17 2021-09-03 住友重机械工业株式会社 Molding apparatus and molding method
US11919573B2 (en) 2019-12-16 2024-03-05 Sumitomo Heavy Industries, Ltd. Vehicle body structure, reinforcement member, and reinforcement member manufacturing method

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007060088A1 (en) 2007-12-13 2009-06-25 Daimler Ag Internal high pressure-transformable hollow section producing method for e.g. door frame, of vehicle, involves joining flange areas with each other such that internal high pressure-transformable hollow section is produced
JP6326224B2 (en) * 2013-12-09 2018-05-16 住友重機械工業株式会社 Molding equipment
DE102014102974A1 (en) 2014-03-06 2015-09-10 Thyssenkrupp Steel Europe Ag Method for customizing the shape of components
JP6285082B2 (en) * 2015-08-27 2018-02-28 住友重機械工業株式会社 Molding apparatus and molding method
CN114425582B (en) * 2022-01-28 2022-11-08 东北林业大学 Internal high-pressure forming device and method for pipe with flange edge

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US4732819A (en) * 1983-05-07 1988-03-22 Honda Giken Kogyo Kabushiki Kaisha Light-weight vehicle frame structure
US5070717A (en) * 1991-01-22 1991-12-10 General Motors Corporation Method of forming a tubular member with flange
US5431326A (en) * 1994-09-07 1995-07-11 General Motors Corporation Method of forming a tubular member with separate flange
US6098262A (en) * 1997-09-26 2000-08-08 Daimlerchrysler Ag Process for manufacturing a hollow body from two metal bars
US6247344B1 (en) * 1999-02-10 2001-06-19 Daimlerchrysler Ag Method of producing a hollow profile with flange
US6394335B2 (en) * 1996-12-03 2002-05-28 Elpatronic Ag Method for producing a molded part and a molded part produced according to said method
US6966209B1 (en) * 1999-02-19 2005-11-22 Bernd Schulze Internal high-pressure deformation method for production of in particular bulging and undercut hollow bodies

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DE19624955A1 (en) * 1996-06-24 1998-01-08 Matthias Prof Dr Ing Kleiner Mobile pipe line manufacturing process
DE10130794A1 (en) * 2001-06-26 2003-01-02 Magna Ihv Ges Fuer Innenhochdr Structural part of a motor vehicle body and method for its production
DE10141503C1 (en) * 2001-08-24 2002-10-10 Audi Ag Production of an elongated hollow body comprises roller profiling and deforming a basic body using an internal high pressure deformation process allowing controlled material flow to produce a fixed flange

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4732819A (en) * 1983-05-07 1988-03-22 Honda Giken Kogyo Kabushiki Kaisha Light-weight vehicle frame structure
US5070717A (en) * 1991-01-22 1991-12-10 General Motors Corporation Method of forming a tubular member with flange
US5431326A (en) * 1994-09-07 1995-07-11 General Motors Corporation Method of forming a tubular member with separate flange
US6394335B2 (en) * 1996-12-03 2002-05-28 Elpatronic Ag Method for producing a molded part and a molded part produced according to said method
US6098262A (en) * 1997-09-26 2000-08-08 Daimlerchrysler Ag Process for manufacturing a hollow body from two metal bars
US6247344B1 (en) * 1999-02-10 2001-06-19 Daimlerchrysler Ag Method of producing a hollow profile with flange
US6966209B1 (en) * 1999-02-19 2005-11-22 Bernd Schulze Internal high-pressure deformation method for production of in particular bulging and undercut hollow bodies

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100186473A1 (en) * 2007-07-20 2010-07-29 Masaaki Mizumura Method for hydroforming and hydroformed product
US8297096B2 (en) 2007-07-20 2012-10-30 Nippon Steel Corporation Method for hydroforming and hydroformed product
US9248490B2 (en) 2011-07-20 2016-02-02 Benteler Automobiltechnik Gmbh Method of manufacturing a tubular structural part, and tubular structural part
CN113333560A (en) * 2017-03-17 2021-09-03 住友重机械工业株式会社 Molding apparatus and molding method
CN107716690A (en) * 2017-11-30 2018-02-23 苏州紫荆清远新能源汽车技术有限公司 A kind of shaped device and method of body of a motor car part list seam
CN107952874A (en) * 2017-11-30 2018-04-24 苏州紫荆清远新能源汽车技术有限公司 A kind of molding machine and method of body of a motor car part double stopper
US11919573B2 (en) 2019-12-16 2024-03-05 Sumitomo Heavy Industries, Ltd. Vehicle body structure, reinforcement member, and reinforcement member manufacturing method

Also Published As

Publication number Publication date
JP2007533462A (en) 2007-11-22
CA2543265A1 (en) 2005-06-09
DE10350145A1 (en) 2005-06-16
EP1680240A1 (en) 2006-07-19
DE10350145B4 (en) 2006-04-13
WO2005051562A1 (en) 2005-06-09

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