JPS5779007A - Reducing mill train for round pipe - Google Patents
Reducing mill train for round pipeInfo
- Publication number
- JPS5779007A JPS5779007A JP15217480A JP15217480A JPS5779007A JP S5779007 A JPS5779007 A JP S5779007A JP 15217480 A JP15217480 A JP 15217480A JP 15217480 A JP15217480 A JP 15217480A JP S5779007 A JPS5779007 A JP S5779007A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- reducing
- rolling stands
- pass
- roll
- 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
- B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
PURPOSE:To inexpensively manufacture various reduced pipe products with good productivity, by dividing a serial rolling mill train into an optional number of blocks comprising plural rolling stands correspondingly to the reducing amount for the pipe diameter, and by making the phase of angular arrangement of roll axes in each block variable. CONSTITUTION:Between the blocks 1, 2 of a rolling mill train comprising plural, #1-#28 for example, rolling stands respectively provided with plural, three for example, rolls, the angle (phase of angular arrangement of the roll) of the roll axes in a plane vertical to the rolling direction of the roll is shifted by 30 deg., for example. After a reducing pass for reducing the pipe diameter from 180mm. to 34mm., if the next pass is scheduled to reduce the pipe diameter from 180mm. to 60mm., it is judged, for instance, that the reducing pass has to be performed by rolling stands from #1 to #20. In this case, six rolling stands #15-#20 are not capable of sufficiently restraining the squaring phenomenon of the inner surface of te round pipe. Then, the phase of angular arrangement of roll axes of four rolling stands #11-#14 is shifted by 30 deg., and the block 2 is constituted of rolling stands #11-#20 for performing a scheduled diameter reducing rolling pass.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15217480A JPS5779007A (en) | 1980-10-31 | 1980-10-31 | Reducing mill train for round pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15217480A JPS5779007A (en) | 1980-10-31 | 1980-10-31 | Reducing mill train for round pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5779007A true JPS5779007A (en) | 1982-05-18 |
Family
ID=15534654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15217480A Pending JPS5779007A (en) | 1980-10-31 | 1980-10-31 | Reducing mill train for round pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5779007A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6056405A (en) * | 1983-09-06 | 1985-04-02 | Nippon Steel Corp | Rolling method of pipe |
JP2007038262A (en) * | 2005-08-03 | 2007-02-15 | Jfe Steel Kk | Reducer for rolling pipe |
JP2007038263A (en) * | 2005-08-03 | 2007-02-15 | Jfe Steel Kk | Reducer for rolling pipe |
JP2013230500A (en) * | 2012-04-02 | 2013-11-14 | Nippon Steel & Sumitomo Metal Corp | Roll stand, and three-roll reducing mill mounting the same |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS544336A (en) * | 1977-06-14 | 1979-01-13 | Tokyo Shibaura Electric Co | Alkaline storage battery |
-
1980
- 1980-10-31 JP JP15217480A patent/JPS5779007A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS544336A (en) * | 1977-06-14 | 1979-01-13 | Tokyo Shibaura Electric Co | Alkaline storage battery |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6056405A (en) * | 1983-09-06 | 1985-04-02 | Nippon Steel Corp | Rolling method of pipe |
JP2007038262A (en) * | 2005-08-03 | 2007-02-15 | Jfe Steel Kk | Reducer for rolling pipe |
JP2007038263A (en) * | 2005-08-03 | 2007-02-15 | Jfe Steel Kk | Reducer for rolling pipe |
JP2013230500A (en) * | 2012-04-02 | 2013-11-14 | Nippon Steel & Sumitomo Metal Corp | Roll stand, and three-roll reducing mill mounting the same |
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