US20070144228A1 - Tool and method for cutting a hollow profile - Google Patents

Tool and method for cutting a hollow profile Download PDF

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Publication number
US20070144228A1
US20070144228A1 US10/577,402 US57740204A US2007144228A1 US 20070144228 A1 US20070144228 A1 US 20070144228A1 US 57740204 A US57740204 A US 57740204A US 2007144228 A1 US2007144228 A1 US 2007144228A1
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US
United States
Prior art keywords
hollow profile
cutting
tool
embossing
punch
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
US10/577,402
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English (en)
Inventor
Helmut Augustin
Stephan Hoefig
Carsten Rogowski
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: AUGUSTIN, HELMUT, HOEFIG, STEPHAN, ROGOWSKI, CARSTEN
Publication of US20070144228A1 publication Critical patent/US20070144228A1/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
    • 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
    • B21D26/047—Mould construction
    • 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
    • B21D26/035—Deforming tubular bodies including an additional treatment performed by fluid pressure, e.g. perforating
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/28—Perforating, i.e. punching holes in tubes or other hollow bodies

Definitions

  • the invention relates to a method and apparatus for cutting a hollow body.
  • German patent document DE 197 24 037 C2 discloses such a method and apparatus, which uses mechanical cutting of a flange on the hollow body along a first cutting edge and internal high pressure cutting along a second cutting edge.
  • the fact that the hollow body is deformed according to the internal high pressure forming process is utilized to the effect that the hollow body is severed transversely to its longitudinal extent preferably after internal high pressure forming has already been performed.
  • a side of a cutting device which faces the hollow body is used for cutting the flange, and serves as a die wall, against which the hollow body bears during the internal high pressure forming.
  • a device or a method of this type is based on the general idea of designing a tool both for cutting a flange on a hollow profile and for forming the hollow profile according to the internal high pressure forming process.
  • the tool has at least one cutting device which is displaceable in the transverse direction of the hollow profile and runs parallel to its longitudinal extent.
  • a side of the cutting device facing the hollow profile is designed as a shaping die wall, against which the hollow profile bears after the cutting operation and during the internal high pressure forming following the cutting operation.
  • the tool With a cutting edge formed on the cutting device, the tool therefore at least partly cuts off a flange, running in the longitudinal direction of the hollow profile, parallel to the longitudinal direction by displacing the cutting edge in the transverse direction of the hollow profile.
  • the side of the device which faces the hollow profile is utilized as a shaping die wall, whose outer side bears against the hollow profile during the internal high pressure forming.
  • the tool makes it possible to complete a cutting operation on the hollow profile blank, before the internal high pressure forming operation starts.
  • This type of construction or procedure therefore offers the advantage that two method steps, namely the cutting of the flange and the subsequent internal high pressure forming, can be effected in one production step using a single tool, thereby simplifying and streamlining the production process, which helps to achieve time or cost advantages.
  • German patent document DE 100 30 882 A1 discloses a precision cutting method and apparatus.
  • first embossing step a punching strip is supported against a fixed surface by means of at least one hold-down, and the part which is to be fabricated is pressed at the same time or with a time delay into an embossing die, preferably against the spring force of a spring base.
  • a sliding surface is produced on the lateral surfaces of the part.
  • the punching strip is supported on a fixed surface by at least one hold-down and then the finished part is cut out with a parting punch in a parting die.
  • German patent document DE 199 01 304 A1 discloses a method of processing workpieces, in which essentially vertically moving processing tools which act on the work pieces are arranged at least one station and essentially horizontally moving processing tools are arranged at least one further station. At least two workpieces, preferably arranged axially symmetrically to one another with a clearance space between them are processed simultaneously in each station.
  • a device suitable for carrying out the method is also disclosed.
  • the device which is designed as a press tool for example, makes it possible to perform cutting/perforating operations, after the deep drawing of a sheet-metal workpiece, on spatially differently oriented surfaces of the workpiece, thereby increasing the capacity of the device.
  • German patent document DE 40 35 938 A1 discloses a press tool with multiple movements, having a punch and die which are movable relative to one another due to the movement of the punch.
  • a counter punch Arranged opposite the punch inside the die is a counter punch which can be moved independently and with a variable force via hydraulic cylinders accommodated in the tool.
  • a counter die which may be arranged opposite the die, adjacent to the punch in the tool, is movable, independently and with a variable force via hydraulic cylinders accommodated in the tool. It is crucial in this case that the counter punch can be moved as part of the tool independently therefrom and with any desired and adjustable force, a factor which defines an additional movement. This counter punch is part of the tool, so a tool with multiple movements is now produced by the additional movement.
  • German patent document DE 101 36 792 A1 discloses a tool for trimming drawn parts.
  • An object of the present invention is to provide an improved method and an apparatus of the type described above, which can achieve a simplified production process can be achieved.
  • the method and apparatus according to the invention includes a positioning device which improves both the quality and reproducibility of the cutting operation and the forming operation.
  • the degree of automation of the cutting and forming operation is also increased.
  • the tool has a bottom die and a top die which are displaceable relative to one another.
  • the cutting device is integrated into one of the dies, such that the cutting edge then forms an integral part of the respective die, or the cutting edge is designed as a separate component and fastened to one of the dies in a fixed position.
  • the cutting device may be arranged on one of the dies in such a way as to have an adjustable stroke.
  • the described variations of the arrangement of the cutting device on the tool evidence the wide range of possibilities that the invention opens up with regard to process-optimized arrangement of the cutting devices.
  • designing the cutting device as a separate component which is fastened to one of the dies in a fixed position offers the advantage that, after a relatively large number of cutting operations, the cutting device or the cutting edge can be exchanged simply and quickly and thus the maintenance cost of the tool can be reduced. If the cutting device is arranged on one of the dies in such a way as to have an adjustable stroke, a markedly smoother mode of operation of the tool is obtained on account of the lower weight of the cutting device that must be moved, compared with the top or bottom die.
  • the integration of the cutting device into one of the dies or the design of the cutting edge as an integral component offers the advantage that an especially precise and powerful cutting operation can be achieved. Due to the many possible ways of arranging the cutting devices on one of the dies, the invention makes it possible to react in a flexible manner to the most varied requirements with regard to the material and/or workpiece to be processed.
  • At least one hold-down which is provided in the region of the cutting edge fixes the flange of the hollow profile at least during the cutting operation.
  • a hold-down ensures that the hollow profile is held in a fixed position during the cutting operation and thus ensures an exact cut of high quality.
  • the hold-down provides for always identical positioning of the hollow profile inside the tool, so that a highly reproducible dimensional accuracy, and thus uniformity of the hollow profiles to be produced, are achieved.
  • An embossing punch may also be provided displaceable transversely to the longitudinal extent of the hollow profile. In this way, it becomes possible to make an embossment on the outside of the hollow profile after the forming operation.
  • the invention thus offers the advantage of carrying out an embossing operation virtually simultaneously, but in particular without a tool change, so that a further production step with the tool according to the invention can be integrated in the respective work station.
  • the embossing punch may be arranged in such a way that it crosses and passes through the cutting device in a corresponding opening during the embossing operation. In this manner, the embossing punch embosses an outer side (bearing against the die wall of the cutting device) of the hollow profile against the internal high pressure, a factor which leads to especially exact and dimensionally accurate embossing.
  • At least one perforating punch which is provided coaxially in the embossing punch, perforates the hollow profile after the embossing operation has been completed.
  • perforation in addition to cutting, internal high pressure forming, and embossing, perforation can now also be integrated as a further processing step in the same tool, as a result of which time and cost advantages are again obtained.
  • the invention ensures high accuracy in the position and shape of the holes produced by the perforating punch, and thus the quality of the hollow profiles produced can be markedly increased. Compared with previous production methods in which the holes are made subsequently in the already finish-shaped hollow profiles, subsequent deformation (and thus dimensional inaccuracy) of the hollow profile can be avoided.
  • the invention offers the great advantage that the embossing punch does not adversely affect the dimensional accuracy (position and shape) of the holes produced by the embossing.
  • first perforating and then embossing can be carried out after the internal high pressure forming, or vice versa.
  • FIG. 1 shows a cross section through a tool according to the invention with inserted hollow profile, before the cutting or forming operation
  • FIG. 2 shows an illustration as in FIG. 1 , but with actuated positioning device
  • FIG. 3 shows a cross section through the tool according to the invention, after the cutting and forming operation and before the embossing or perforating operation;
  • FIG. 4 shows an illustration as in FIG. 3 but with embossing and perforating operation completed
  • FIG. 5 shows a cross section through the tool with opened top and bottom die.
  • a tool 1 for cutting a flange 3 on a hollow profile 2 has a bottom die 7 and a top die 8 , which are displaceable relative to one another.
  • the top die 8 is displaceable toward the bottom die 7 .
  • the bottom die 7 it is also possible for the bottom die 7 to be displaceable toward the top die 8 or for both to be mounted in an displaceable manner.
  • the tool 1 has at least one cutting device 4 , which runs parallel to the longitudinal extent of the hollow profile, has a cutting edge 5 and is displaceable transversely relative to the hollow profile 2 .
  • the cutting device 4 may be integrated in one of the dies 7 or 8 , so that the cutting edge 5 becomes integral part of the respective die 7 or 8 .
  • the cutting device 4 may be also be designed as a separate component which is fastened on one of the two dies 7 or 8 , (the top die 8 in FIG. 1 ), in a fixed position.
  • the cutting device 4 may be arranged on one of the dies 7 or 8 so that it is adjustable in stroke relative to the respective die 7 , 8 .
  • the flange 3 can be cut off or severed in an especially powerful, and thus precise, manner, and the quality of a subsequent end product is therefore markedly increased.
  • the embodiment of the cutting device 4 as a separate component which is fastened on one of the two dies 7 or 8 in a fixed position offers the advantage that the cutting edge 5 (for example, a parting blade), can be exchanged in a simple and cost-effective manner.
  • Hardened metals, for example, which have an especially long service life, are suitable as cutting edge 5 .
  • the third variant in which the cutting device 4 , with the cutting edge 5 , is arranged in a displaceable manner on one of the dies 7 or 8 , offers the advantage that the cutting operation can be separated from a closing operation of the tool 1 , i.e. from a movement of the top die 8 and the bottom die 7 toward one another.
  • a shaping die wall 17 is formed on a side 6 of the cutting device 4 facing the hollow profile 2 , which bears against the die wall 17 after the cutting operation and during the subsequent internal high pressure forming.
  • the top die 8 and the bottom die 7 each have an L-shaped cross section, such that, when they meet, the L-shaped portions form a cavity 14 in which the hollow profile 2 can be shaped by internal high pressure.
  • the cavity 14 is in this case defined at least on one side by the die wall 17 of the cutting device 4 .
  • a positioning device 9 is provided on the tool 1 . Before the cutting and forming operation, positioning device 9 presses the hollow profile 2 against that side 6 of the cutting device 4 which faces the hollow profile 2 (that is, against the die wall 17 of the cutting device 4 ).
  • the positioning device 9 may be designed, for example, as a punch which is acted upon by spring force or hydraulic pressure and which is extendable and retractable in one of the dies 7 or 8 , (the bottom die 7 in the drawings).
  • the positioning device 9 is actuated and, in the actuated state, presses the hollow profile 2 against the side 6 of the cutting device 4 .
  • At least one hold-down 10 is provided in the region of the cutting edge 5 , and [[which]] fixes the flange 3 of the hollow profile 2 during the cutting operation.
  • a second hold-down 10 ′ can also be provided by a stepped design of the cutting edge 5 , to fix the hollow profile 2 in position during the forming operation or embossing and perforating operation following the cutting operation.
  • an embossing punch 11 is provided which is displaceable transversely to the longitudinal extent of the hollow profile 2 and provides an embossment (cf. FIG. 4 ) on the outside of the hollow profile 2 after the forming operation.
  • the embossing punch 11 is preferably actuated hydraulically, and acts during the embossing against an internal high pressure p i which prevails inside the hollow profile 2 .
  • the embossing punch 11 may expediently be arranged in such a way that it crosses and passes through the cutting device 4 in a corresponding opening 12 after the cutting operation and during the embossing operation.
  • the embossing punch 11 moves with the cutting device 4 or the top die 8 transversely to its embossing direction. It is possible, for example, for an embossing surface 15 formed on the end face of the embossing punch 11 to be part of the shaping die wall 17 of the cutting device 4 .
  • the embossing of the hollow profile 2 is effected against the internal high pressure p i and after the cutting operation, so that, with the embossing, an additional but facultative processing step can be carried out with the tool 1 .
  • At least one perforating punch 13 which perforates the hollow profile 2 after the completed embossing operation, is disposed coaxially in the embossing punch 11 .
  • An embossing direction of the embossing punch 11 is in this case parallel to a direction of movement of the perforating punch 13 .
  • the tool according to the invention thus makes it possible to integrate a further likewise facultative processing step, namely the perforating of the hollow profile 2 , into the tool 1 itself, so that the production process can be greatly rationalized.
  • the embossing or the perforating against the internal high pressure p i offers the advantage that embossments produced beforehand are not adversely affected by the perforating or perforations on account of the internal high pressure p i , so that a high quality of the hollow profiles 2 produced can be achieved.
  • the hollow profile 2 (at this stage is still a hollow profile blank, not designated in any more detail) is inserted into the tool 1 , with the two dies 7 and 8 being in the open state (that is, positioned at a distance from one another). Thereafter, as shown in FIG. 2 , the positioning device 9 pushes the hollow profile 2 (still before the cutting and forming operation), against that side 6 of the cutting device 4 which faces the hollow profile 2 (that is against the die wall 17 ). During the positioning, the tool, according to FIG. 2 , is still in a partly open state, so that a simple adjustment of the hollow profile 2 in the direction of the cutting device 4 is possible.
  • the cutting operation is effected after the positioning.
  • the top die 8 moves toward the bottom die 7 and cuts off the flange 3 of the hollow profile 2 by means of the cutting edge 5 , situated at the front on the cutting device 4 in the direction of movement.
  • at least one hold-down 10 arranged in the region of the cutting edge 5 fixes the flange 3 of the hollow profile 2 .
  • a second hold-down 10 ′ fixes the remaining flange stub of the hollow profile 2 and thus fixes the hollow profile 2 in its position.
  • cutting scrap falls through an ejection shaft 16 , which according to FIGS. 1 to 5 runs out vertically in the bottom die 7 in the direction of movement of the cutting device 4 .
  • the flange 3 is cut by the closing of the tool 1 (that is, by a movement of the top die 8 toward the bottom die 7 ). It is also possible in this case for the cutting operation to be effected only after the closing of the tool (that is, when the top die 8 bears against the bottom die 7 ), by a cutting device 4 which is adjustable in stroke and is designed, for example, as a separate component.
  • the hollow profile blank 2 ′ is formed by internal high pressure forming and in the process changes in size and form in accordance with the illustration in FIG. 3 .
  • the positioning device 9 is actively shifted back or passively thrust back to a corresponding extent. That is, the holding or positioning force of the positioning device 9 is significantly smaller than the forces which occur during the forming and which widen the hollow profile 2 .
  • an embossing punch 11 which is displaceable transversely to the longitudinal direction of the hollow profile 2 can make an embossment on the outside of the hollow profile 2 according to FIG. 4 .
  • Such an embossing operation is optionally selectable. Embossing is effected according to FIG. 4 by the embossing punch 11 moving transversely to the longitudinal extent of the hollow profile 2 through the opening 12 in the cutting device 4 and embossing a recess in an outer wall of the hollow profile 2 by means of the embossing surface 15 provided at the front in the embossing direction.
  • a perforating punch 13 arranged coaxially in the embossing punch 11 can perforate the hollow profile 2 after the embossing operation has been completed. (See FIG. 4 .) To this end, the perforating punch 13 travels transversely to the direction of movement of the cutting device 4 and parallel to the embossing direction of the embossing punch 11 and pierces an outer wall of the hollow profile 2 . According to FIGS. 3 and 4 , one perforating punch 13 is provided. However, it is also possible for a plurality of perforating punches 13 to be arranged.
  • perforating it is also conceivable for perforating to be effected without embossing of the hollow profile 2 .
  • embossing punch 11 or perforating punch 13 acting against the internal high pressure p i it is possible to carry out both the embossing and the perforating on the hollow profile 2 without these processing steps adversely affecting one another as in a conventional method of production in a plurality of steps.
  • the embossing surface 15 of the embossing punch 11 may form part of the side 6 of the cutting device 4 which is designed as a shaping die wall 17 .
  • the opening 12 it is also conceivable for the opening 12 not to open until during an embossing or perforating operation and for it to be closed during the cutting operation or during the forming operation, so that the shaping die wall 17 is formed completely by that side 6 of the cutting device 4 which faces the hollow profile 2 .
  • the tool 1 is opened after the cutting and forming, embossing and/or perforating operations by moving the top die 8 away from the bottom die 7 .
  • the embossing punch 11 and also the perforating punch 13 are retracted into the tool 1 or the cutting device 4 at least to such an extent that the two dies 7 and 8 can move apart without any problems and the hollow profile 2 can be removed from the tool 1 .
  • a tool 1 which is designed for cutting a flange 3 of a hollow profile 2 and for forming the hollow profile 2 by an internal high pressure forming process, includes a cutting device 4 which has a cutting edge 5 , runs parallel to the longitudinal extent and can be displaced in the transverse direction of the hollow profile 2 .
  • a side 6 of the cutting device facing the hollow profile 2 is designed as a shaping die wall 17 , against which the hollow profile 2 bears during the internal high pressure forming after the cutting operation.
  • a plurality of processing steps hitherto separate from one another can be effected promptly and without removal of the hollow profile 2 from the tool 1 .
  • the processing steps of embossing and perforating can be carried out optionally, so that cutting of the flange 3 and subsequent forming and/or subsequent embossing and/or subsequent perforating can be carried out with the tool 1 according to the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Punching Or Piercing (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US10/577,402 2003-10-28 2004-10-13 Tool and method for cutting a hollow profile Abandoned US20070144228A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10350156.8 2003-10-28
DE10350156A DE10350156B3 (de) 2003-10-28 2003-10-28 Werkzeug und Verfahren zum Schneiden eines Hohlprofils
PCT/EP2004/011454 WO2005046898A2 (de) 2003-10-28 2004-10-13 Werkzeug und verfahren zum schneiden eines hohlprofils

Publications (1)

Publication Number Publication Date
US20070144228A1 true US20070144228A1 (en) 2007-06-28

Family

ID=32981367

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/577,402 Abandoned US20070144228A1 (en) 2003-10-28 2004-10-13 Tool and method for cutting a hollow profile

Country Status (6)

Country Link
US (1) US20070144228A1 (de)
EP (1) EP1684924A2 (de)
JP (1) JP2007534489A (de)
CA (1) CA2543808A1 (de)
DE (1) DE10350156B3 (de)
WO (1) WO2005046898A2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109590676A (zh) * 2018-11-02 2019-04-09 陈志城 一种新型液压成型手推车的制备工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5070717A (en) * 1991-01-22 1991-12-10 General Motors Corporation Method of forming a tubular member with flange
DE4035938A1 (de) * 1990-11-03 1992-05-07 Manfred Wanzke Mehrwegwerkzeug fuer pressen
US6470546B1 (en) * 1997-08-02 2002-10-29 Daimlerchrysler Ag Process and apparatus for producing a linkage of an air/fuel ratio detector holder to an exhaust pipe
US6484551B1 (en) * 1996-11-20 2002-11-26 Daimlerchrysler Ag Process for manufacturing holes on the circumference of hollow sections
US6591648B1 (en) * 2002-06-24 2003-07-15 Greenville Tool & Die Company Method of stamping and piercing a tube
US7249481B1 (en) * 2006-05-01 2007-07-31 Ford Global Technologies, Llc Process for forming a hydroformed automotive component with integrated weld flange

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19724037C2 (de) * 1997-06-06 2000-08-31 Audi Ag Verfahren zum Schneiden eines Hohlkörpers
DE19901304B4 (de) * 1999-01-15 2005-04-14 Audi Ag Verfahren und Vorrichtung zum Bearbeiten von Werkstücken
DE10030882A1 (de) * 2000-06-23 2002-01-03 Prometall Werkzeugbau Gmbh Präzisionsschneidverfahren und Vorrichtung
DE10136792B4 (de) * 2001-07-27 2005-10-13 Audi Ag Werkzeug zum Beschneiden von Ziehteilen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4035938A1 (de) * 1990-11-03 1992-05-07 Manfred Wanzke Mehrwegwerkzeug fuer pressen
US5070717A (en) * 1991-01-22 1991-12-10 General Motors Corporation Method of forming a tubular member with flange
US6484551B1 (en) * 1996-11-20 2002-11-26 Daimlerchrysler Ag Process for manufacturing holes on the circumference of hollow sections
US6470546B1 (en) * 1997-08-02 2002-10-29 Daimlerchrysler Ag Process and apparatus for producing a linkage of an air/fuel ratio detector holder to an exhaust pipe
US6591648B1 (en) * 2002-06-24 2003-07-15 Greenville Tool & Die Company Method of stamping and piercing a tube
US7249481B1 (en) * 2006-05-01 2007-07-31 Ford Global Technologies, Llc Process for forming a hydroformed automotive component with integrated weld flange

Also Published As

Publication number Publication date
JP2007534489A (ja) 2007-11-29
WO2005046898A2 (de) 2005-05-26
CA2543808A1 (en) 2005-05-26
WO2005046898A3 (de) 2007-05-03
DE10350156B3 (de) 2004-10-14
EP1684924A2 (de) 2006-08-02

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AS Assignment

Owner name: DAIMLERCHRYSLER AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AUGUSTIN, HELMUT;HOEFIG, STEPHAN;ROGOWSKI, CARSTEN;REEL/FRAME:018734/0257;SIGNING DATES FROM 20060512 TO 20060515

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION