JPS55147424A - Production of u.o.e. steel pipe - Google Patents

Production of u.o.e. steel pipe

Info

Publication number
JPS55147424A
JPS55147424A JP5567679A JP5567679A JPS55147424A JP S55147424 A JPS55147424 A JP S55147424A JP 5567679 A JP5567679 A JP 5567679A JP 5567679 A JP5567679 A JP 5567679A JP S55147424 A JPS55147424 A JP S55147424A
Authority
JP
Japan
Prior art keywords
forming
steel plate
punch
edge
angle
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.)
Pending
Application number
JP5567679A
Other languages
Japanese (ja)
Inventor
Yutaka Mihara
Tomoshige Shiyudo
Koji Yazawa
Toshiro Ishihara
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP5567679A priority Critical patent/JPS55147424A/en
Publication of JPS55147424A publication Critical patent/JPS55147424A/en
Pending legal-status Critical Current

Links

Landscapes

  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

PURPOSE: To reduce press forming force at UO forming and prevent the occurrence of peaking without requiring exchanging of dies according to the diameters of steel pipes by forming the shape of the end of the side edge under the specific conditions in the edge bending process of the side edges of the steel plate.
CONSTITUTION: The punch 1 embedded in a punch holder 5 and a punch support 3 are made horizontally movable so as to permit changing of the spacing with a die 2 according to the thickness of a steel plate 4. To bend the edge of the steel plate 4, a forming length l is beforehand set under the following conditions, after which the steel plate 4 is clamped by blank holder 7 and the punch 1 is pushed up to a forming angle Q (hence the forming angle Q is determined by the stroke of the punch). Namely, l/w=0.04W0.08, Q=30W60° (where l is forming length, w the width of the steel plate and Q the forming angle).
COPYRIGHT: (C)1980,JPO&Japio
JP5567679A 1979-05-09 1979-05-09 Production of u.o.e. steel pipe Pending JPS55147424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5567679A JPS55147424A (en) 1979-05-09 1979-05-09 Production of u.o.e. steel pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5567679A JPS55147424A (en) 1979-05-09 1979-05-09 Production of u.o.e. steel pipe

Publications (1)

Publication Number Publication Date
JPS55147424A true JPS55147424A (en) 1980-11-17

Family

ID=13005479

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5567679A Pending JPS55147424A (en) 1979-05-09 1979-05-09 Production of u.o.e. steel pipe

Country Status (1)

Country Link
JP (1) JPS55147424A (en)

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