JPS57152318A - Manufacture of bent pipe - Google Patents
Manufacture of bent pipeInfo
- Publication number
- JPS57152318A JPS57152318A JP4129781A JP4129781A JPS57152318A JP S57152318 A JPS57152318 A JP S57152318A JP 4129781 A JP4129781 A JP 4129781A JP 4129781 A JP4129781 A JP 4129781A JP S57152318 A JPS57152318 A JP S57152318A
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- plates
- straight pipe
- pipe
- press
- 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
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
PURPOSE:To make operation easy and quick by penetrating a laminated mandrel through a straight pipe and pulling out plates forming the mandrel successively after bending by a press. CONSTITUTION:A mandrel B is constructed by piling plates 1 which widen from the center to both sides, and penetrated through a straight pipe. After heating the mandrel B together with the straight pipe to proper temperature, the straight pipe is placed on a fixed die 2 of a press die. After that, the straight pipe and the mandrel B are bent to arcuate form with forming grooves 4, 5 of a movable die 3 and the fixed die 2 by foreward movement of the movable die 3. After bending, formed bent pipe A' is taken out and the center plate 1 of the mandrel 1 is cut by fusion to make clearance between the inner periphery of the bent pipe A' and outside plates 1. The plates are pulled out successively to obtain a bent pipe A'. Pulled out plates are heated to proper temperature and made flat by a press and reutilized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4129781A JPS58928B2 (en) | 1981-03-17 | 1981-03-17 | Method for manufacturing bent pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4129781A JPS58928B2 (en) | 1981-03-17 | 1981-03-17 | Method for manufacturing bent pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57152318A true JPS57152318A (en) | 1982-09-20 |
| JPS58928B2 JPS58928B2 (en) | 1983-01-08 |
Family
ID=12604518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4129781A Expired JPS58928B2 (en) | 1981-03-17 | 1981-03-17 | Method for manufacturing bent pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58928B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2072158A1 (en) * | 2007-12-19 | 2009-06-24 | IBF S.p.A. | Method for bending tubular articles with a relative ratio of the bending radius and the outer diameter of the finished pipe which is less than 3. |
-
1981
- 1981-03-17 JP JP4129781A patent/JPS58928B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2072158A1 (en) * | 2007-12-19 | 2009-06-24 | IBF S.p.A. | Method for bending tubular articles with a relative ratio of the bending radius and the outer diameter of the finished pipe which is less than 3. |
| US8037726B2 (en) | 2007-12-19 | 2011-10-18 | Ibf S.P.A. | Method for bending tubular articles with a relative ratio of the bending radius and the outer diameter of the finished pipe which is less than 3 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58928B2 (en) | 1983-01-08 |
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