JPS6415205A - Method for rolling continuously seamless steel tube - Google Patents
Method for rolling continuously seamless steel tubeInfo
- Publication number
- JPS6415205A JPS6415205A JP16883587A JP16883587A JPS6415205A JP S6415205 A JPS6415205 A JP S6415205A JP 16883587 A JP16883587 A JP 16883587A JP 16883587 A JP16883587 A JP 16883587A JP S6415205 A JPS6415205 A JP S6415205A
- Authority
- JP
- Japan
- Prior art keywords
- stand
- thick
- stock
- walled part
- inside surface
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/02—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length
- B21B17/04—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel, i.e. the mandrel rod contacts the rolled tube over the rod length in a continuous process
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
PURPOSE:To prevent thickness deviation on the shell inside surface by bringing the total periphery of the inside surface of a hollow tube stock into contact with a mandrel bar at an intermediate stand, rolling the stock with a local part in the periphery of the stock formed into a thickness-walled part, and rolling the thick-walled part in a succeeding stand. CONSTITUTION:A thick-walled part 11a is formed on a hollow tube stock 11 whose thickness and outside diameter are largely reduced in an upstream stand of a mandrel mill by influence of a roll gap part 5b in the outlet side of a No.4 stand. The thick-walled part 11a abuts on a grooved part 5a formed at the central part of the groove bottom of a grooved roll 5A of a No.5 stand, so that other parts of the stock 11 are uniformly rolled down by the grooved roll and the periphery of the inside surface is rolled to get closely and totally contact with a mandrel bar 4. Then, the thick-walled part 11a abuts on the roll gap 5b, is not screwed down, and is further locally thickened in a No.6 stand because a grooved roll 5 of the No.6 stand is oriented to till by 90 deg. to the No.5 stand. Only the thick-walled part 11a is locally rolled in a No.7 stand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16883587A JPS6415205A (en) | 1987-07-08 | 1987-07-08 | Method for rolling continuously seamless steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16883587A JPS6415205A (en) | 1987-07-08 | 1987-07-08 | Method for rolling continuously seamless steel tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6415205A true JPS6415205A (en) | 1989-01-19 |
Family
ID=15875404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16883587A Pending JPS6415205A (en) | 1987-07-08 | 1987-07-08 | Method for rolling continuously seamless steel tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6415205A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03113896U (en) * | 1990-03-09 | 1991-11-21 |
-
1987
- 1987-07-08 JP JP16883587A patent/JPS6415205A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03113896U (en) * | 1990-03-09 | 1991-11-21 |
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