GB973133A - Improvements in the manufacture of tube bends - Google Patents

Improvements in the manufacture of tube bends

Info

Publication number
GB973133A
GB973133A GB439663A GB439663A GB973133A GB 973133 A GB973133 A GB 973133A GB 439663 A GB439663 A GB 439663A GB 439663 A GB439663 A GB 439663A GB 973133 A GB973133 A GB 973133A
Authority
GB
United Kingdom
Prior art keywords
bend
jaws
heated
compression
parts
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
GB439663A
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.)
Babcock International Ltd
Original Assignee
Babcock and Wilcox Ltd
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 Babcock and Wilcox Ltd filed Critical Babcock and Wilcox Ltd
Publication of GB973133A publication Critical patent/GB973133A/en
Expired legal-status Critical Current

Links

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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
    • B21C37/283—Making U-pieces

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

973,133. Making tube bends; bending; forging. BABCOCK & WILCOX Ltd. Feb. 4, 1963 [Feb. 7, 1962], No. 4396/63. Headings B3A, B3E, B3H and B3Q. A method of making steel tube bends having a small radius of bend comprises forming a bend of large radius, heating the median part of the bend, holding the rectilineal branches by respective jaw members and giving the jaw members relative motion normal to the transverse plane of symmetry of the bend to effect a compression of the heated region which at least initially is free of contact with any surfaces of support or compression. A tube bend of relatively large radius is heated in the region ABCD and placed between two parallel plates 4, 6 each formed in two parts 4<SP>1</SP>, 4<SP>11</SP> and 6<SP>1</SP>, 6<SP>11</SP> positioned by bands 8 to leave a central free space 10. Rectilineal branches 2<SP>1</SP>, 2<SP>11</SP> of the bend are held by jaws 14, 16, each in two parts 14<SP>1</SP>, 14<SP>11</SP> and 16<SP>1</SP>, 16<SP>11</SP>, which are then moved towards one another in the direction G to deform the bend, thickening the inner and outer bend walls as shown in Fig. 3. A heated neutral gas under pressure may be passed into the tube towards the end of the compression to apply the soft parts of the outside of the bend to contours 24, 26 of the jaws 14, 16. The region ABCD may be heated by a ring of jets during compression. A rib may be formed on the bend between the upper parts 28, 30 of the jaws 14, 16. Grooves may be provided in the jaws 14, 16 to enable ribs to be formed by pressing metal in the grooves. In an alternative arrangement, Fig. 6, plates 4A, 6A are each in one part but are hollowed out at 22 so that the bend 2A may swell freely; bends of 120 degrees may be worked as above.
GB439663A 1962-02-07 1963-02-04 Improvements in the manufacture of tube bends Expired GB973133A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR887267A FR1321533A (en) 1962-02-07 1962-02-07 Manufacture of tube hangers

Publications (1)

Publication Number Publication Date
GB973133A true GB973133A (en) 1964-10-21

Family

ID=8772164

Family Applications (1)

Application Number Title Priority Date Filing Date
GB439663A Expired GB973133A (en) 1962-02-07 1963-02-04 Improvements in the manufacture of tube bends

Country Status (3)

Country Link
CH (1) CH402781A (en)
FR (1) FR1321533A (en)
GB (1) GB973133A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175419A (en) * 1978-03-31 1979-11-27 Combustion Engineering, Inc. No-size squeezing of 180 degree boiler-tube return bends

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175419A (en) * 1978-03-31 1979-11-27 Combustion Engineering, Inc. No-size squeezing of 180 degree boiler-tube return bends

Also Published As

Publication number Publication date
CH402781A (en) 1965-11-30
FR1321533A (en) 1963-03-22

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