JPS5636329A - Rough shaping roll for steel pipe - Google Patents

Rough shaping roll for steel pipe

Info

Publication number
JPS5636329A
JPS5636329A JP11026979A JP11026979A JPS5636329A JP S5636329 A JPS5636329 A JP S5636329A JP 11026979 A JP11026979 A JP 11026979A JP 11026979 A JP11026979 A JP 11026979A JP S5636329 A JPS5636329 A JP S5636329A
Authority
JP
Japan
Prior art keywords
curved surface
degrees
rough shaping
roll
pipe
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.)
Granted
Application number
JP11026979A
Other languages
Japanese (ja)
Other versions
JPS5746926B2 (en
Inventor
Eiji Ono
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.)
Nippon Steel Metal Products Co Ltd
Original Assignee
Nippon Steel Metal Products Co 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 Nippon Steel Metal Products Co Ltd filed Critical Nippon Steel Metal Products Co Ltd
Priority to JP11026979A priority Critical patent/JPS5636329A/en
Publication of JPS5636329A publication Critical patent/JPS5636329A/en
Publication of JPS5746926B2 publication Critical patent/JPS5746926B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To reduce the number of times of the interchanging works for the roll, and to improve the working efficiency, by employing the segment type roll whose both end segments are provided with three kinds of curved surfaces and the middle segment is provided with the flat profile.
CONSTITUTION: The upper roll 1 and the lower roll 2 are respectively divided into three segments; hereupon, the left and the right end segments 3, 4, are provided with the profile of curved surface, and the middle segment 5 is provided with the flat profile. The left and the right end segments of the rolls 1, 2, are provided with the profile comprising three kinds of curved surfaces as follows; the description of three curved surfaces are made from outside to inside successively; the outermost curved surface has a bend radius R3 and the arc angle θ3 of 15W45 degrees re- quired for rough shaping the edge of the pipe of the maximum diameter; the middle curved surface has the bend radius R1 and the arc angle θ1 of 40W55 degrees required for rough shaping the edge of the pipe of minimum diameter; and the innermost curved surface has the bend radius R2 and the arc angle θ2 of 5W45 degrees required for rough shaping the inner curved surface connecting to the edge of the pipe of minimum diameter; hereupon, the sum of three arc angles are specified to be 60W130 degrees for the segment on one side.
COPYRIGHT: (C)1981,JPO&Japio
JP11026979A 1979-08-31 1979-08-31 Rough shaping roll for steel pipe Granted JPS5636329A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11026979A JPS5636329A (en) 1979-08-31 1979-08-31 Rough shaping roll for steel pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11026979A JPS5636329A (en) 1979-08-31 1979-08-31 Rough shaping roll for steel pipe

Publications (2)

Publication Number Publication Date
JPS5636329A true JPS5636329A (en) 1981-04-09
JPS5746926B2 JPS5746926B2 (en) 1982-10-06

Family

ID=14531394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11026979A Granted JPS5636329A (en) 1979-08-31 1979-08-31 Rough shaping roll for steel pipe

Country Status (1)

Country Link
JP (1) JPS5636329A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60257924A (en) * 1984-06-02 1985-12-19 Kawasaki Steel Corp Method and device for producing square pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60257924A (en) * 1984-06-02 1985-12-19 Kawasaki Steel Corp Method and device for producing square pipe

Also Published As

Publication number Publication date
JPS5746926B2 (en) 1982-10-06

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