GB962937A - Improvements relating to tubular return bends - Google Patents

Improvements relating to tubular return bends

Info

Publication number
GB962937A
GB962937A GB3564062A GB3564062A GB962937A GB 962937 A GB962937 A GB 962937A GB 3564062 A GB3564062 A GB 3564062A GB 3564062 A GB3564062 A GB 3564062A GB 962937 A GB962937 A GB 962937A
Authority
GB
United Kingdom
Prior art keywords
tube
diameter
legs
blocks
bend
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
GB3564062A
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 GB962937A publication Critical patent/GB962937A/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)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Forging (AREA)

Abstract

962,937. Making return bends; forging. BABCOCK & WILCOX Ltd. Sept. 19, 1962 [Sept. 22, 1961], No. 35640/62. Headings B3A and B3H. A method of making a return bend comprises forming a suitable length of tube having a diameter substantially greater than the required diameter or diameters of the leg portions of the return bend, reducing the diameter of the end parts of the tube and bending the length into the form of a return bend. A length of tube having a diameter 50% or more greater than the tubes to be connected to it is reduced asymmetrically at its ends and bent through 180 degrees by any known method. The bent tube is compressed between a pair of blocks 10 down to the diameter of the leg portion 18 and a pair of dies 12 slidable between the blocks engage the curved portion of the tube to reduce the radius of curvature, the distance between the legs and produce a rearwardly extending bulbous portion 16 which may be opened to a desired diameter to form a stub. A mandrel may be inserted through the wall of the bent pipe to facilitate the forming of the bulb and mandrels inserted in the legs during pressing. The faces of the blocks 10 may be inclined. The tube ends may be reduced asymmetrically or symmetrically after bending. Ribs 20, 20<SP>1</SP> may be formed externally along the legs of the finished bend by the displacement of the excess material during the reducing operation using grooved blocks and dies. The ribs of adjacent tubes may be welded together to form a continuous tube wall. The leg diameters may be different and the bulbous portion off-set so as to form a continuation of one of the legs. A tube having a thinner wall portion on one side than the other in which the thinner side is positioned on the inside of the bend may be used. During the forming operations the tube may be generally or locally heated.
GB3564062A 1961-09-22 1962-09-19 Improvements relating to tubular return bends Expired GB962937A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR873925A FR1308049A (en) 1961-09-22 1961-09-22 Tubing elbow manufacturing process

Publications (1)

Publication Number Publication Date
GB962937A true GB962937A (en) 1964-07-08

Family

ID=8763322

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3564062A Expired GB962937A (en) 1961-09-22 1962-09-19 Improvements relating to tubular return bends

Country Status (2)

Country Link
FR (1) FR1308049A (en)
GB (1) GB962937A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5094096A (en) * 1989-06-14 1992-03-10 Chromcraft Furniture Corp. Method of bending
CN109940104A (en) * 2019-02-28 2019-06-28 浙江长兴和良智能装备有限公司 A kind of forming method of tee tube, molding machine and formation system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58125332A (en) * 1982-01-22 1983-07-26 Kubota Ltd Manufacture of flat cylindrical body

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5094096A (en) * 1989-06-14 1992-03-10 Chromcraft Furniture Corp. Method of bending
CN109940104A (en) * 2019-02-28 2019-06-28 浙江长兴和良智能装备有限公司 A kind of forming method of tee tube, molding machine and formation system
CN109940104B (en) * 2019-02-28 2024-03-26 浙江长兴和良智能装备有限公司 Forming method, forming device and forming system of three-way pipe

Also Published As

Publication number Publication date
FR1308049A (en) 1962-11-03

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