GB758830A - A new or improved process of bending tubes - Google Patents

A new or improved process of bending tubes

Info

Publication number
GB758830A
GB758830A GB2524653A GB2524653A GB758830A GB 758830 A GB758830 A GB 758830A GB 2524653 A GB2524653 A GB 2524653A GB 2524653 A GB2524653 A GB 2524653A GB 758830 A GB758830 A GB 758830A
Authority
GB
United Kingdom
Prior art keywords
bend
tube
section
arms
dies
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
GB2524653A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2524653A priority Critical patent/GB758830A/en
Publication of GB758830A publication Critical patent/GB758830A/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)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

758,830. Bending pipes. FREEMAN, E. S. Sept. 7, 1954 [Sept. 12, 1953], No. 25246/53. Classes 83 (2) and 83 (4). A process of tube bending comprises bending a tube bend, in the form of a wide U, to the form of a narrow U by grooved dies engaging the straight arms of the bend and pressing them on to a grooved former, the curved portion of the bend being allowed to take-up an elliptical cross-section, then placing the so-bent tube between a pair of shaping dies each having a cavity corresponding to the entire configuration of the bend and moving the dies together to press the curved part of the bend into a less elliptical cross-section. A tube bent into the form of a wide U with a semicircular bend 10 and two parallel straight arms 11 is placed between upper and lower die elements 12, 13 formed with semicircular sectioned grooves 16, 17 engaging the outer parts of the arms 11. A ram 14 of a press then urges the dies 12, 13 together to press the arms 11 towards one another over a former 18 therebetween. The former 18 has semicircular sectioned grooves 21 along the faces engaging the straight tube arms 11, but around the curved end 19 engaging the inner part of the bend, the former has a groove 22 of semicircular section at the ends adjacent the grooves 21, but of semi-elliptical section therebetween to allow the curved part 10 of the bend to take up an elliptical cross-section, Fig. 5. A stop 23 engages the outside of the bend. The tube is then removed from the dies 12, 13 and placed between a pair of shaping dies 24, Fig. 6, having grooves 25 of U shape and of semicircular section along the arms of the U but of semi-elliptical section around the bend, which move toward one another to compress the tube around the bend 10, Fig. 7.
GB2524653A 1953-09-12 1953-09-12 A new or improved process of bending tubes Expired GB758830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2524653A GB758830A (en) 1953-09-12 1953-09-12 A new or improved process of bending tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2524653A GB758830A (en) 1953-09-12 1953-09-12 A new or improved process of bending tubes

Publications (1)

Publication Number Publication Date
GB758830A true GB758830A (en) 1956-10-10

Family

ID=10224582

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2524653A Expired GB758830A (en) 1953-09-12 1953-09-12 A new or improved process of bending tubes

Country Status (1)

Country Link
GB (1) GB758830A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009080346A1 (en) * 2007-12-21 2009-07-02 Sunrise Medical Gmbh & Co. Kg Caster strut, wheelchair frame and wheelchair
CN102266876A (en) * 2011-07-04 2011-12-07 偃师华科管件有限责任公司 Forming process and mould of seamless fork-shaped pipe
US8262117B2 (en) 2008-10-10 2012-09-11 Sunrise Medical Gmbh & Co. Kg Wheelchair comprising a foot support

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009080346A1 (en) * 2007-12-21 2009-07-02 Sunrise Medical Gmbh & Co. Kg Caster strut, wheelchair frame and wheelchair
US8490994B2 (en) 2007-12-21 2013-07-23 Sunrise Medical Gmbh & Co. Kg Wheelchair frame and wheelchair with cross-brace
US8262117B2 (en) 2008-10-10 2012-09-11 Sunrise Medical Gmbh & Co. Kg Wheelchair comprising a foot support
CN102266876A (en) * 2011-07-04 2011-12-07 偃师华科管件有限责任公司 Forming process and mould of seamless fork-shaped pipe

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