IE39013B1 - Improvements in the manufacture of tubular members - Google Patents

Improvements in the manufacture of tubular members

Info

Publication number
IE39013B1
IE39013B1 IE00258/74A IE25874A IE39013B1 IE 39013 B1 IE39013 B1 IE 39013B1 IE 00258/74 A IE00258/74 A IE 00258/74A IE 25874 A IE25874 A IE 25874A IE 39013 B1 IE39013 B1 IE 39013B1
Authority
IE
Ireland
Prior art keywords
strip
cross
corner
bending
polygonal
Prior art date
Application number
IE00258/74A
Other versions
IE39013L (en
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 IE39013L publication Critical patent/IE39013L/en
Publication of IE39013B1 publication Critical patent/IE39013B1/en

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. [GB1433431A]
IE00258/74A 1973-02-14 1974-02-11 Improvements in the manufacture of tubular members IE39013B1 (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 (2)

Publication Number Publication Date
IE39013L IE39013L (en) 1974-08-14
IE39013B1 true IE39013B1 (en) 1978-07-19

Family

ID=25565953

Family Applications (1)

Application Number Title Priority Date Filing Date
IE00258/74A IE39013B1 (en) 1973-02-14 1974-02-11 Improvements in the 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)

Families Citing this family (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
JPH03147298A (en) * 1989-11-01 1991-06-24 Mitsubishi Electric Corp Vacuum container for accelerator
DE4442434C1 (en) * 1994-11-29 1995-10-05 Welser Ohg Josef Method for mfr. of rolled hollow plate profiles
IT1394852B1 (en) * 2009-07-21 2012-07-20 Olimpia 80 Srl VARIABLE LINEAR GEOMETRY MACHINE TO FORM SQUARE TUBES CONTINUOUSLY

Also Published As

Publication number Publication date
IL44178A (en) 1977-01-31
IT1027520B (en) 1978-12-20
GB1433431A (en) 1976-04-28
IL44178A0 (en) 1974-05-16
IE39013L (en) 1974-08-14
FR2217083B3 (en) 1976-11-26
DE2406710A1 (en) 1974-08-22
FR2217083A1 (en) 1974-09-06
ZA731045B (en) 1974-06-26

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