GB768753A - Method and apparatus for reshaping conduits - Google Patents

Method and apparatus for reshaping conduits

Info

Publication number
GB768753A
GB768753A GB3678/55A GB367855A GB768753A GB 768753 A GB768753 A GB 768753A GB 3678/55 A GB3678/55 A GB 3678/55A GB 367855 A GB367855 A GB 367855A GB 768753 A GB768753 A GB 768753A
Authority
GB
United Kingdom
Prior art keywords
mandrel
conduit
tube
cord
flexible
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
Application number
GB3678/55A
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.)
Goodyear Tire and Rubber Co
Original Assignee
Goodyear Tire and Rubber Co
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 Goodyear Tire and Rubber Co filed Critical Goodyear Tire and Rubber Co
Publication of GB768753A publication Critical patent/GB768753A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/80—Component parts, details or accessories; Auxiliary operations
    • B29C53/82—Cores or mandrels
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/08—Bending or folding of tubes or other profiled members
    • B29C53/083—Bending or folding of tubes or other profiled members bending longitudinally, i.e. modifying the curvature of the tube axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/16—Straightening or flattening
    • B29C53/20—Straightening or flattening of tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

768,753. Flexible mandrels. GOODYEAR TIRE & RUBBER CO. Feb. 8, 1955 [July 26, 1954], No. 3678/55. Class 83 (4). [Also in Group V] A flexible mandrel for supporting the walls of a conduit during a reshaping, e.g. bending, of the conduit comprises a length of resiliently extensible mesh structure, e.g. wire mesh in tubular form, adapted to be stretched longitudinally, to enter the conduit, and to support the conduit walls when the tension is released and the mandrel tends to return to its original diameter. The conduit to be reshaped may be formed of ductile metal such as lead and copper which may be deformed cold. The flexible mandrel comprises a tubular mesh 1 of braided resilient tapes 11, Fig. 7, or of braided flat bands 3, each band comprising tempered steel wires, 2, Fig. 3, placed side by side. At one end of the mandrel the bands are gathered into a lug-plate 4 and at the other end may simply be terminated to avoid unravelling or may be gathered to a plate 6. The cross-section of the mandrel corresponds to the cross-section of the conduit to be bent, e.g. a rectangular-sectioned mandrel for a rectangular-sectioned conduit, but the mandrel has an outside diameter when unstretched larger than the inside diameter of the conduit. The mandrel may have an expansible cover. In operation the mandrel is pulled by a cord 8 into a tube 9 to be bent, and the pull on the cord is then released to allow the mandrel to expand to support the tube 9. The tube is heated, then bent and then allowed to cool to regain its normal rigidity. The mandrel is then pulled from the tube by the cord 8 or by a cord attached to the other end of the mandrel. The cord 8 may be replaced by a flexible pushshaft extending through the mandrel and engaging the end thereof. Alternatively the mandrel may be prestressed before insertion in the tube and may be compressed axially while therein to increase its rigidity.
GB3678/55A 1954-07-26 1955-02-08 Method and apparatus for reshaping conduits Expired GB768753A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US768753XA 1954-07-26 1954-07-26
US1118552XA 1954-07-26 1954-07-26

Publications (1)

Publication Number Publication Date
GB768753A true GB768753A (en) 1957-02-20

Family

ID=26758566

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3678/55A Expired GB768753A (en) 1954-07-26 1955-02-08 Method and apparatus for reshaping conduits

Country Status (2)

Country Link
DE (1) DE960046C (en)
GB (1) GB768753A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043361A (en) * 1959-02-24 1962-07-10 Clarence L Kelso Pipe wall supporting mechanism
GB2000385A (en) * 1977-06-10 1979-01-04 Cables De Lyon Geoffroy Delore Circular wave guide
DE2834511A1 (en) * 1978-07-28 1980-02-07 Vollmar Jonasson DUROPLAST TUBE
GB2200062A (en) * 1987-01-21 1988-07-27 Benteler Werke Ag A method of and apparatus for bending tubes
WO2009079706A1 (en) * 2007-12-21 2009-07-02 Weir Minerals Australia Ltd Method for manufacturing a mandrel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL110288C (en) * 1961-11-03

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE113084C (en) *
US406992A (en) * 1889-07-16 Pipe-bender
DE72118C (en) * G. OESTEN in Berlin NW., Stromstr. 55 Method of bending tubes
US174609A (en) * 1876-03-07 Improvement in machines for bending tubing
US2380344A (en) * 1943-12-31 1945-07-10 Frank G Sutton Chain mandrel for bending pipes

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3043361A (en) * 1959-02-24 1962-07-10 Clarence L Kelso Pipe wall supporting mechanism
GB2000385A (en) * 1977-06-10 1979-01-04 Cables De Lyon Geoffroy Delore Circular wave guide
GB2000385B (en) * 1977-06-10 1982-02-17 Cables De Lyon Geoffroy Delore A circular wave guide
DE2834511A1 (en) * 1978-07-28 1980-02-07 Vollmar Jonasson DUROPLAST TUBE
GB2200062A (en) * 1987-01-21 1988-07-27 Benteler Werke Ag A method of and apparatus for bending tubes
GB2200062B (en) * 1987-01-21 1991-07-17 Benteler Werke Ag Apparatus for bending tubes.
WO2009079706A1 (en) * 2007-12-21 2009-07-02 Weir Minerals Australia Ltd Method for manufacturing a mandrel
US8900504B2 (en) 2007-12-21 2014-12-02 Weir Vulco, S.A. Method for manufacturing a mandrel

Also Published As

Publication number Publication date
DE960046C (en) 1957-03-14

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