EP0677342A3 - Method of and device for bending hollow section work pieces. - Google Patents

Method of and device for bending hollow section work pieces. Download PDF

Info

Publication number
EP0677342A3
EP0677342A3 EP95890082A EP95890082A EP0677342A3 EP 0677342 A3 EP0677342 A3 EP 0677342A3 EP 95890082 A EP95890082 A EP 95890082A EP 95890082 A EP95890082 A EP 95890082A EP 0677342 A3 EP0677342 A3 EP 0677342A3
Authority
EP
European Patent Office
Prior art keywords
die
tube
work pieces
hollow section
section work
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.)
Granted
Application number
EP95890082A
Other languages
German (de)
French (fr)
Other versions
EP0677342B1 (en
EP0677342A2 (en
Inventor
Gerfried Ing Auer
Ernst Dr Bitsche
Alfred Poetsch
Alexander Dr Renner
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.)
ERNE FITTINGS GMBH
Original Assignee
Erne-Fittings & Co GmbH
Erne Fittings & Co GmbH
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 Erne-Fittings & Co GmbH, Erne Fittings & Co GmbH filed Critical Erne-Fittings & Co GmbH
Publication of EP0677342A2 publication Critical patent/EP0677342A2/en
Publication of EP0677342A3 publication Critical patent/EP0677342A3/en
Application granted granted Critical
Publication of EP0677342B1 publication Critical patent/EP0677342B1/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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
    • B21D9/03—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length and built-up from loose elements, e.g. series of balls

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

Tubular components are subjected to a forming process to produce curved lengths. The tube can be circular, elliptical or other cross-sectional shape. The required shape of the curve is provided a two part forming die (11). The initially straight tube (13) is inserted into the die and is held between sealing units (14, 15). Pressurised fluid is introduced (21) from a programmably controlled supply system. The tube is forced to adopt the curved shape with guide elements in the die (19) maintaining position. The forming pressure and fluid pressure is accurately controlled. <IMAGE>
EP95890082A 1994-04-12 1995-04-10 Method of and device for bending hollow section work pieces Expired - Lifetime EP0677342B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0074794A AT402479B (en) 1994-04-12 1994-04-12 METHOD AND DEVICE FOR BENDING HOLLOW PROFILE WORKPIECES
AT747/94 1994-04-12

Publications (3)

Publication Number Publication Date
EP0677342A2 EP0677342A2 (en) 1995-10-18
EP0677342A3 true EP0677342A3 (en) 1996-01-17
EP0677342B1 EP0677342B1 (en) 1998-09-23

Family

ID=3498745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95890082A Expired - Lifetime EP0677342B1 (en) 1994-04-12 1995-04-10 Method of and device for bending hollow section work pieces

Country Status (3)

Country Link
EP (1) EP0677342B1 (en)
AT (2) AT402479B (en)
DE (1) DE59503656D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10625322B2 (en) 2015-04-01 2020-04-21 Blm S.P.A. Apparatus for improving the quality of tube bending and method that uses such apparatus
CN109821945B (en) * 2019-03-18 2020-06-23 燕山大学 Metal pipe bending device
CN110576089B (en) * 2019-08-05 2020-08-21 中国科学院金属研究所 Particle filler assisted push-bending forming method for large-caliber small-bending-radius thin-wall bent pipe
CN114210789A (en) * 2021-11-05 2022-03-22 佛山市永恒液压机械有限公司 Pipe fitting bending forming process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH373340A (en) * 1959-11-12 1963-11-30 Erhmon Armstrong David Method for shaping and cold sizing of a bent tubular article and apparatus for its implementation
DE2008917A1 (en) * 1970-02-26 1971-09-16 Schulz, Wilhelm, 4150 Krefeld Process for the production of seamless pipe bends
DE2358756A1 (en) * 1973-08-30 1975-03-20 Ind Meccanica Brevetti Pedrazz BENDING PIPE
EP0432347A1 (en) * 1989-12-11 1991-06-19 Kabushiki Kaisha Asahi Kinzoku Kogyosho Curved pipe manufacturing method and an apparatus for carrying out same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56119626A (en) * 1980-02-22 1981-09-19 Hitachi Ltd Pipe bending machine
US4542637A (en) * 1983-11-21 1985-09-24 Bending Products, Inc. Tube bending mandrel
JPS60148627A (en) * 1984-01-13 1985-08-05 Mitsubishi Heavy Ind Ltd Bending method of pipe
DE4103081A1 (en) * 1991-02-01 1992-08-06 Eichelberg & Co Gmbh H D METHOD FOR THE HYDROSTATIC FORMING OF HOLLOW BODIES FROM COLD FORMABLE METAL AND DEVICE FOR IMPLEMENTING THE METHOD

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH373340A (en) * 1959-11-12 1963-11-30 Erhmon Armstrong David Method for shaping and cold sizing of a bent tubular article and apparatus for its implementation
DE2008917A1 (en) * 1970-02-26 1971-09-16 Schulz, Wilhelm, 4150 Krefeld Process for the production of seamless pipe bends
DE2358756A1 (en) * 1973-08-30 1975-03-20 Ind Meccanica Brevetti Pedrazz BENDING PIPE
EP0432347A1 (en) * 1989-12-11 1991-06-19 Kabushiki Kaisha Asahi Kinzoku Kogyosho Curved pipe manufacturing method and an apparatus for carrying out same

Also Published As

Publication number Publication date
AT402479B (en) 1997-05-26
ATE171404T1 (en) 1998-10-15
EP0677342B1 (en) 1998-09-23
DE59503656D1 (en) 1998-10-29
ATA74794A (en) 1996-10-15
EP0677342A2 (en) 1995-10-18

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