GB942439A - Improvements in a method of manufacturing tubes - Google Patents

Improvements in a method of manufacturing tubes

Info

Publication number
GB942439A
GB942439A GB1703462A GB1703462A GB942439A GB 942439 A GB942439 A GB 942439A GB 1703462 A GB1703462 A GB 1703462A GB 1703462 A GB1703462 A GB 1703462A GB 942439 A GB942439 A GB 942439A
Authority
GB
United Kingdom
Prior art keywords
tube
striae
clamps
twist
twisting
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
GB1703462A
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 GB942439A publication Critical patent/GB942439A/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
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
    • 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
    • B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
    • B21C37/26—Making finned or ribbed tubes by fixing strip or like material to tubes helically-ribbed tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

942,439. Making helically finned tubes; twisting. BABCOCK & WILCOX Ltd. May 3, 1962 [May 5, 1961], No. 17034/62. Headings B3A and B3E. A method of making tubes with helical striae for use in heat exchangers and vapour generating plant comprises applying torsion to a tube having longitudinal striae so as axially to twist the tube and impart to it a permanent twist and a helical form to the striae. A tube having longitudinal external and/or internal striae is clamped at one end and fitted with a spaced apart second clamp rotatable about the tube axis and which applies torsion to the tube between the clamps to deform the tube axially and twist the striae to a helical form. Additional freely rotatable anti-buckling clamps or sleeves are fitted along the length of the tube between the two clamps or a mandrel inserted in the bore. The tube may be externally or internally heated to facilitate twisting and the clamping devices water cooled. The speed of twisting may be controlled by the speed at which the heating appliance e.g. a ring of gas flame is passed through the bore. A tube formed with internal striae is twisted a predetermined amount greater than that required, prior to forming on the tube external striae, the tube is then twisted in the opposite sense to that of the first operation by an amount equal to the excess twist imparted to the internal striae. Pitch variations are obtained by means of clamps positioned at various points along the tube length.
GB1703462A 1961-05-05 1962-05-03 Improvements in a method of manufacturing tubes Expired GB942439A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR860834A FR1296617A (en) 1961-05-05 1961-05-05 Manufacturing process for helically ribbed tubes

Publications (1)

Publication Number Publication Date
GB942439A true GB942439A (en) 1963-11-20

Family

ID=8754509

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1703462A Expired GB942439A (en) 1961-05-05 1962-05-03 Improvements in a method of manufacturing tubes

Country Status (2)

Country Link
FR (1) FR1296617A (en)
GB (1) GB942439A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0153970A1 (en) * 1984-03-07 1985-09-11 Wieland-Werke AG Method and apparatus for making a tube with internal helical ribs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0153970A1 (en) * 1984-03-07 1985-09-11 Wieland-Werke AG Method and apparatus for making a tube with internal helical ribs

Also Published As

Publication number Publication date
FR1296617A (en) 1962-06-22

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