JPS55114407A - Production of steel bar having hollow part of sectional area ratio 0.3 or less and producing device - Google Patents

Production of steel bar having hollow part of sectional area ratio 0.3 or less and producing device

Info

Publication number
JPS55114407A
JPS55114407A JP2143179A JP2143179A JPS55114407A JP S55114407 A JPS55114407 A JP S55114407A JP 2143179 A JP2143179 A JP 2143179A JP 2143179 A JP2143179 A JP 2143179A JP S55114407 A JPS55114407 A JP S55114407A
Authority
JP
Japan
Prior art keywords
steel bar
rolls
sectional area
area ratio
less
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
JP2143179A
Other languages
Japanese (ja)
Inventor
Hisashi Gondo
Masahisa Akazawa
Shinichi Suzuki
Takeshi Miki
Samon Yanagimoto
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 Corp
Original Assignee
Nippon Steel Corp
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 Corp filed Critical Nippon Steel Corp
Priority to JP2143179A priority Critical patent/JPS55114407A/en
Publication of JPS55114407A publication Critical patent/JPS55114407A/en
Pending legal-status Critical Current

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  • Metal Rolling (AREA)

Abstract

PURPOSE: To produce the captioned hollow steel bar with good productivity with simple equipment by making a hole in a heated-solid-blank billet, then alternately rolling the same with horizontal and vertical hole type rolls.
CONSTITUTION: The solid blank billet 5 having been heated in a furnace 1 is led to a piercing machine 2 and this is pushed into rolls 6 by a pusher rod 3 and is pierced with a plug 9. Next, the blank billet 16 having been opened with this hole is rolled with the continuous rolling mills comprising disposing multiple horizontal rolls 13 and vertical rolls 14 alternately without using plug, whereby the steel bar having the hollow part of sectional area ratio 0.3 or less is obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP2143179A 1979-02-27 1979-02-27 Production of steel bar having hollow part of sectional area ratio 0.3 or less and producing device Pending JPS55114407A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2143179A JPS55114407A (en) 1979-02-27 1979-02-27 Production of steel bar having hollow part of sectional area ratio 0.3 or less and producing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2143179A JPS55114407A (en) 1979-02-27 1979-02-27 Production of steel bar having hollow part of sectional area ratio 0.3 or less and producing device

Publications (1)

Publication Number Publication Date
JPS55114407A true JPS55114407A (en) 1980-09-03

Family

ID=12054788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2143179A Pending JPS55114407A (en) 1979-02-27 1979-02-27 Production of steel bar having hollow part of sectional area ratio 0.3 or less and producing device

Country Status (1)

Country Link
JP (1) JPS55114407A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3323221A1 (en) * 1982-06-30 1984-01-05 Sumitomo Metal Industries, Ltd., Osaka METHOD FOR PRODUCING TUBE PIPE
JPS60137510A (en) * 1983-12-27 1985-07-22 Nippon Steel Corp Coiled steel pipe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3323221A1 (en) * 1982-06-30 1984-01-05 Sumitomo Metal Industries, Ltd., Osaka METHOD FOR PRODUCING TUBE PIPE
US4510787A (en) * 1982-06-30 1985-04-16 Sumitomo Metal Industries, Ltd. Method of manufacturing hollow rods
JPS60137510A (en) * 1983-12-27 1985-07-22 Nippon Steel Corp Coiled steel pipe

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