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 deviceInfo
- 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
Links
Landscapes
- 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
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)
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 |
-
1979
- 1979-02-27 JP JP2143179A patent/JPS55114407A/en active Pending
Cited By (3)
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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