JPS5573407A - Plug holder for pipe mill - Google Patents
Plug holder for pipe millInfo
- Publication number
- JPS5573407A JPS5573407A JP14766878A JP14766878A JPS5573407A JP S5573407 A JPS5573407 A JP S5573407A JP 14766878 A JP14766878 A JP 14766878A JP 14766878 A JP14766878 A JP 14766878A JP S5573407 A JPS5573407 A JP S5573407A
- Authority
- JP
- Japan
- Prior art keywords
- plug
- stopper
- rod
- cap
- cavity
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
- B21B25/06—Interchanging mandrels, fixing plugs on mandrel rods or cooling during interchanging mandrels
Abstract
PURPOSE:To simply, efficiently carry out the replacement work for the plug of the pipe mill, by fitting the piston rod into the cavity of the bar cap being connected to the mandrel bar, and by arranging the flexible plug stopper in this rod. CONSTITUTION:The bar cap 3 possessing cavities 4, 5, 6, 6', is screwed to the tip of the mandrel bar 1 through the washer 2. The piston is fitted in above cavities 6, 6', and the piston rod 8 is fitted in the cavity 5 so as to be slidable in the axial direction. The stopper 9 is hinged to the rod 8, and the stopper 9 is flexibly inserted into the radial hole 7 of the cap 3. When the rod 8 is advanced to the side of plug 18, the stopper 9 shrinks and enters into the hole 7: the fluid is fed into the caivty 6 through the communication hole 16, and the rod 8 is moved backward; hereby, the stopper 9 expands and engages with the protuberance 19 of the plug 18, and the plug 18 is fixed to the cap 3. The plug 18 can be detached by retreating the rod 8 so as to shrink the stopper 9, by discharging the fluid from the communicating hole of the cavity 10, and by pulling away the plug 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14766878A JPS5573407A (en) | 1978-11-29 | 1978-11-29 | Plug holder for pipe mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14766878A JPS5573407A (en) | 1978-11-29 | 1978-11-29 | Plug holder for pipe mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5573407A true JPS5573407A (en) | 1980-06-03 |
| JPS616721B2 JPS616721B2 (en) | 1986-02-28 |
Family
ID=15435561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14766878A Granted JPS5573407A (en) | 1978-11-29 | 1978-11-29 | Plug holder for pipe mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5573407A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4370879A (en) * | 1980-08-26 | 1983-02-01 | Kopysky Boris D | Method for manufacturing a piercing mandrel |
| CN102527725A (en) * | 2012-03-12 | 2012-07-04 | 常州宝菱重工机械有限公司 | Connection device for push head and push rod of perforating machine |
| CN104324941A (en) * | 2014-09-05 | 2015-02-04 | 宁波惠杰钢管制造有限公司 | Perforated ejection rod device and use method thereof |
-
1978
- 1978-11-29 JP JP14766878A patent/JPS5573407A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4370879A (en) * | 1980-08-26 | 1983-02-01 | Kopysky Boris D | Method for manufacturing a piercing mandrel |
| CN102527725A (en) * | 2012-03-12 | 2012-07-04 | 常州宝菱重工机械有限公司 | Connection device for push head and push rod of perforating machine |
| CN104324941A (en) * | 2014-09-05 | 2015-02-04 | 宁波惠杰钢管制造有限公司 | Perforated ejection rod device and use method thereof |
| CN104324941B (en) * | 2014-09-05 | 2015-12-09 | 宁波惠杰钢管制造有限公司 | A kind of perforation pin-lift arrangement and using method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS616721B2 (en) | 1986-02-28 |
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