GB1433431A - Manufacture of tubular members - Google Patents

Manufacture of tubular members

Info

Publication number
GB1433431A
GB1433431A GB591674A GB591674A GB1433431A GB 1433431 A GB1433431 A GB 1433431A GB 591674 A GB591674 A GB 591674A GB 591674 A GB591674 A GB 591674A GB 1433431 A GB1433431 A GB 1433431A
Authority
GB
United Kingdom
Prior art keywords
strip
cross
corner
bending
polygonal
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
GB591674A
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.)
African Gate & Fence Works
Original Assignee
African Gate & Fence Works
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 African Gate & Fence Works filed Critical African Gate & Fence Works
Publication of GB1433431A publication Critical patent/GB1433431A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
    • B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers
    • 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
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes

Landscapes

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

Abstract

1433431 Making polygonal tubing; bending AFRICAN GATE & FENCE WORKS Ltd 8 Feb 1974 [14 Feb 1973] 05916/74 Headings B3A and B3E A method of making tubular members of polygonal cross-section from strip material comprises bending the strip by rolling to form the desired cross-sectional shape so that its edges abut along a corner of the member and welding the edges together at the corner, the longitudinal edge portions of the strip being the first to be bent and welding being effected only when the final cross-sectional shape has been formed. The strip passes through a series of roller pairs, the first pair 23 being alignment rollers, the second pair 2 bending each strip edge to form a fraction of a completed corner of the tubular member, and the remaining pairs 4, 7, 8, 11, 12 bend the strip into rectangular or other polygonal crosssection. The rollers comprise hard steel and sections (30), Fig. 10 (not shown), and mild steel spacing sections (31) which may be added or removed to vary the cross-sectional dimensions of the piping being formed. The strip edges are welded together at a high-frequency welding station 24 and a cutting blade 25 trims the weld. Lengths of the formed tube may be subsequently cut off.
GB591674A 1973-02-14 1974-02-08 Manufacture of tubular members Expired GB1433431A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA731045A ZA731045B (en) 1973-02-14 1973-02-14 Improvements in the manufacture of tubular members

Publications (1)

Publication Number Publication Date
GB1433431A true GB1433431A (en) 1976-04-28

Family

ID=25565953

Family Applications (1)

Application Number Title Priority Date Filing Date
GB591674A Expired GB1433431A (en) 1973-02-14 1974-02-08 Manufacture of tubular members

Country Status (7)

Country Link
DE (1) DE2406710A1 (en)
FR (1) FR2217083B3 (en)
GB (1) GB1433431A (en)
IE (1) IE39013B1 (en)
IL (1) IL44178A (en)
IT (1) IT1027520B (en)
ZA (1) ZA731045B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122696A (en) * 1976-12-13 1978-10-31 Nippon Steel Corporation Method and apparatus for manufacturing metallic pipe
US5101167A (en) * 1989-11-01 1992-03-31 Mitsubishi Denki Kabushiki Kaisha Accelerator vacuum pipe having a layer of a getter material disposed on an inner surface of the pipe
EP0715904A1 (en) * 1994-11-29 1996-06-12 Josef Welser Ohg Profilier- Und Stanzwerk Method of manufacturing a rollformed hollow profile from metal sheet
ITMI20091284A1 (en) * 2009-07-21 2011-01-22 Olimpia 80 Srl VARIABLE LINEAR GEOMETRY MACHINE TO FORM SQUARE TUBES CONTINUOUSLY

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122696A (en) * 1976-12-13 1978-10-31 Nippon Steel Corporation Method and apparatus for manufacturing metallic pipe
US5101167A (en) * 1989-11-01 1992-03-31 Mitsubishi Denki Kabushiki Kaisha Accelerator vacuum pipe having a layer of a getter material disposed on an inner surface of the pipe
EP0715904A1 (en) * 1994-11-29 1996-06-12 Josef Welser Ohg Profilier- Und Stanzwerk Method of manufacturing a rollformed hollow profile from metal sheet
ITMI20091284A1 (en) * 2009-07-21 2011-01-22 Olimpia 80 Srl VARIABLE LINEAR GEOMETRY MACHINE TO FORM SQUARE TUBES CONTINUOUSLY
EP2279807A1 (en) * 2009-07-21 2011-02-02 Olimpia 80 SRL A variable linear geometry machine for continuously forming square tubes
US8100312B2 (en) 2009-07-21 2012-01-24 Olimpia 80 S.R.L. Variable linear geometry machine for continuously forming square tubes
RU2534651C2 (en) * 2009-07-21 2014-12-10 Олимпия 80 С.Р.Л. Machine with variable linear geometry for continuous forming of pipes with square cross-section

Also Published As

Publication number Publication date
IE39013B1 (en) 1978-07-19
IT1027520B (en) 1978-12-20
FR2217083B3 (en) 1976-11-26
IE39013L (en) 1974-08-14
FR2217083A1 (en) 1974-09-06
IL44178A0 (en) 1974-05-16
DE2406710A1 (en) 1974-08-22
ZA731045B (en) 1974-06-26
IL44178A (en) 1977-01-31

Similar Documents

Publication Publication Date Title
GB1049600A (en) Method of and apparatus for the automatic continuous production of lattice girders
US3039414A (en) Method of producing hollow four-sided tapering beams or columns from sheet metal
GB1398463A (en) Method of making profiled rails and bodies composed thereof
GB1433431A (en) Manufacture of tubular members
GB1168478A (en) Forming apparatus for transversely curving metal ribbons
ES8101998A1 (en) Method of forming profiles, especially tubular profiles.
GB1446023A (en) Methods and apparatus for manufacturing heating radiator panels
GB1389184A (en) Method and apparatus for the automatic manufacture of duct elements
US1805283A (en) Method of manufacturing hollow articles
JPS55112128A (en) Production of large-diameter square steel pipe
US2529088A (en) Method of making one-piece angular frame members
GB975697A (en) Fabricated tubing and the method and apparatus for producing the same
GB1387157A (en) Making of truss members
GB988273A (en) Template for the continuous production of tubing
KR19990086807A (en) Non-welded rectangular pipes and manufacturing method thereof
US2005579A (en) Electrically welding pipe
FR2221604A1 (en) Metal reinforcing for concrete etc. - has bars braced with V-shaped cross-pieces of continuous metal sheet
GB1093771A (en) A method of manufacturing double-walled or multi-walled tubes
GB1164007A (en) Bolts
GB1436897A (en) Fabrication of fire damper units
US2741831A (en) Method for producing screen frame bars
FR2077457A1 (en) Metal cutting and stamping machine
GB1429201A (en) Manufacture of welded floos gratings
JPS5611114A (en) Notching apparatus internally provided with puncher
JPS56160827A (en) Production of large-diameter welded steel pipe

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee