EP0195408A3 - Improved flexible mandrel for bending hollow articles - Google Patents

Improved flexible mandrel for bending hollow articles Download PDF

Info

Publication number
EP0195408A3
EP0195408A3 EP86103646A EP86103646A EP0195408A3 EP 0195408 A3 EP0195408 A3 EP 0195408A3 EP 86103646 A EP86103646 A EP 86103646A EP 86103646 A EP86103646 A EP 86103646A EP 0195408 A3 EP0195408 A3 EP 0195408A3
Authority
EP
European Patent Office
Prior art keywords
mandrel
cross
hoses
hollow articles
flexible mandrel
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.)
Ceased
Application number
EP86103646A
Other languages
German (de)
French (fr)
Other versions
EP0195408A2 (en
Inventor
James Donald Klingensmith
Robert Paul Evert
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.)
Howmet Aerospace Inc
Original Assignee
Aluminum Company of America
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 Aluminum Company of America filed Critical Aluminum Company of America
Publication of EP0195408A2 publication Critical patent/EP0195408A2/en
Publication of EP0195408A3 publication Critical patent/EP0195408A3/en
Ceased 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

Abstract

The invention comprises a flexible mandrel for insertion into and removal from a hollow member, said mandrel being adapted to provide support for the walls of the hollow member in the process of bending the member, the mandrel comprising a plurality of elongated individual hoses dis­ posed together in a side-by-side manner to form a unitary, elongated mandrel structure, said hoses being capable of expanding in cross section when a fluid is directed to them under pressure at a predetermined pressure value and contracting in cross section when the pressure value is lowered to or below a predetermined value, the cross-­ sectional expansion and contraction of the hoses being effective to expand and contract the cross-sectional area of the mandrel structure.
EP86103646A 1985-03-21 1986-03-18 Improved flexible mandrel for bending hollow articles Ceased EP0195408A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US71436385A 1985-03-21 1985-03-21
US714363 2000-11-15

Publications (2)

Publication Number Publication Date
EP0195408A2 EP0195408A2 (en) 1986-09-24
EP0195408A3 true EP0195408A3 (en) 1987-04-29

Family

ID=24869738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103646A Ceased EP0195408A3 (en) 1985-03-21 1986-03-18 Improved flexible mandrel for bending hollow articles

Country Status (2)

Country Link
EP (1) EP0195408A3 (en)
JP (1) JPS61253126A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3701612A1 (en) * 1987-01-21 1988-08-04 Benteler Werke Ag METHOD FOR BENDING TUBES AND SUPPORTING PIN FOR PERFORMING THE METHOD

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1555895A (en) * 1924-11-03 1925-10-06 American Nat Company Method of bending sheet-metal blanks having alpha rolled edge
DE1552862A1 (en) * 1966-12-29 1969-09-11 Banning Ag Maschinenfabrik J Bending mandrel for thin-walled pipes
US3851519A (en) * 1972-06-06 1974-12-03 Crc Crose Int Inc Internal pipe supporting mandrel
DE2449221A1 (en) * 1973-10-17 1975-04-24 Pneumatiques Caoutchouc Mfg EXPANDABLE PIN OR CORE FOR BENDING LARGE DIAMETER METAL PIPES
US3922134A (en) * 1973-12-17 1975-11-25 Robintech Inc Pipe bending mandrel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1555895A (en) * 1924-11-03 1925-10-06 American Nat Company Method of bending sheet-metal blanks having alpha rolled edge
DE1552862A1 (en) * 1966-12-29 1969-09-11 Banning Ag Maschinenfabrik J Bending mandrel for thin-walled pipes
US3851519A (en) * 1972-06-06 1974-12-03 Crc Crose Int Inc Internal pipe supporting mandrel
DE2449221A1 (en) * 1973-10-17 1975-04-24 Pneumatiques Caoutchouc Mfg EXPANDABLE PIN OR CORE FOR BENDING LARGE DIAMETER METAL PIPES
US3922134A (en) * 1973-12-17 1975-11-25 Robintech Inc Pipe bending mandrel

Also Published As

Publication number Publication date
EP0195408A2 (en) 1986-09-24
JPS61253126A (en) 1986-11-11

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Inventor name: EVERT, ROBERT PAUL

Inventor name: KLINGENSMITH, JAMES DONALD