JPS55112107A - Rolling method for press roll piercing - Google Patents
Rolling method for press roll piercingInfo
- Publication number
- JPS55112107A JPS55112107A JP1788279A JP1788279A JPS55112107A JP S55112107 A JPS55112107 A JP S55112107A JP 1788279 A JP1788279 A JP 1788279A JP 1788279 A JP1788279 A JP 1788279A JP S55112107 A JPS55112107 A JP S55112107A
- Authority
- JP
- Japan
- Prior art keywords
- ellipse type
- mills
- press roll
- pipe blank
- round
- 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
- B21B17/08—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 having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills
-
- 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
- B21B17/08—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 having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills
- B21B17/10—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 having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills 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 generation of over filling and wrinkle flaw, and to efficiently elongate the ellipse type thick walled hollow pipe blank, and to make possible the manufacture of the seamless steel pipe of good quality, by constituting so as to perform the ellipse type press roll rolling pass, and then, to perform the forming work with the round caliber of the rolling mill. CONSTITUTION:The rolling mills 1a, 1b, facing each other, possessing the ellipse type calibers, and the rolling mills 11a, 11b, possessing the round calibers, are continuously installed respectively in horizontal and vertical positions; a square billet 4a is inserted into the mills 1a, 1b, and the common mandrel 12 is pierced in order to form the ellipse type thick walled hollow pipe blank 4b; and next, this pipe blank 4b is rolled by the mills 11a, 11b, and is elongated into the round hollow pipe blank. By performing the ellipse type press roll piercing, the generation of the over filling and wrinkle flaw can be prevented, and the elongation can be efficiently performed. As a result, the seamless steel pipe of good quality can be manufactured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1788279A JPS55112107A (en) | 1979-02-20 | 1979-02-20 | Rolling method for press roll piercing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1788279A JPS55112107A (en) | 1979-02-20 | 1979-02-20 | Rolling method for press roll piercing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55112107A true JPS55112107A (en) | 1980-08-29 |
Family
ID=11956063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1788279A Pending JPS55112107A (en) | 1979-02-20 | 1979-02-20 | Rolling method for press roll piercing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55112107A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5847795A (en) * | 1995-07-27 | 1998-12-08 | Canon Kabushiki Kaisha | Liquid crystal display apparatus and anti-reflection film applicable thereto |
| US8267631B2 (en) | 2010-07-26 | 2012-09-18 | Infom Co., Ltd. | Fitting member positioning device |
-
1979
- 1979-02-20 JP JP1788279A patent/JPS55112107A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5847795A (en) * | 1995-07-27 | 1998-12-08 | Canon Kabushiki Kaisha | Liquid crystal display apparatus and anti-reflection film applicable thereto |
| US8267631B2 (en) | 2010-07-26 | 2012-09-18 | Infom Co., Ltd. | Fitting member positioning device |
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