EP1021257B1 - Method and plant for the production of frustoconical pipes - Google Patents
Method and plant for the production of frustoconical pipes Download PDFInfo
- Publication number
- EP1021257B1 EP1021257B1 EP97934493A EP97934493A EP1021257B1 EP 1021257 B1 EP1021257 B1 EP 1021257B1 EP 97934493 A EP97934493 A EP 97934493A EP 97934493 A EP97934493 A EP 97934493A EP 1021257 B1 EP1021257 B1 EP 1021257B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- calibrating rollers
- rollers
- calibrating
- conicity
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/16—Making tubes with varying diameter in longitudinal direction
- B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
- B21C37/185—Making tubes with varying diameter in longitudinal direction conical tubes starting from sheet material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
Definitions
- the central axis of the pipe may be kept at a constant level during feeding of the pipe, whereas the height at which welding is performed may vary.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
- Heat Treatment Of Articles (AREA)
- Forging (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
Claims (7)
- Method for the production of frustoconical pipes from metal sheets bent so as to leave open a longitudinal slit and fed between the active profile of calibrating rollers so as to be welded along said slit the feed speed of the pipe (1) between the calibrating rollers (8) being greater than the tangential speed of said calibrating rollers in the zone of tangency with the pipe, characterized in that each of the profiles of the calibrating rollers (8) extends over about 90° so that the two profiles embrace a top part of the fed pipe while a bottom part of the pipe, about 180°, rests on a die (6) having the same shape and conicity as the pipe.
- Method according to claim 1, in which the central axis of the pipe is kept at a constant level during feeding of pipe, while the height at which welding is performed varies.
- Method according to claim 1 or 2, in which pipes of varying conicity are produced by means of adjustment of the speed of rotation of the calibrating rollers with respect to the feed speed of the pipe, using the same calibrating rollers.
- Method according to claim 1, in which the feed speed of the pipe between the calibrating rollers is a function of the conicity of the pipe.
- Method according to claim 1, in which feeding of the pipe is performed by means of pushing or pulling of the pipe.
- Plant for the production of frustoconical pipes from metal sheets bent so as to leave open a longitudinal slit and fed compressed between the active profile of calibrating rollers (8) so as to be welded along said slit, the extension of the active profile of the calibrating rollers (8) being less than the length of the pipe (1) to be formed and welded, characterized in that each of the profiles of the calibrating rollers (8) extends over about 90° so that the two profiles embrace the top part of the pipe (1) while the bottom part of the pipe, about 180°, rests on a die (6) having the same shape and conicity as the pipe (1).
- Plant according to claim 6, in which the ratio between the extension of the active profile of the calibrating rollers (8) and the length of the pipe (1) to be formed and welded is comprised between 0.05 and 0.5.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP1997/003873 WO1999003611A1 (en) | 1997-07-15 | 1997-07-15 | Method and plant for the production of frustoconical pipes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1021257A1 EP1021257A1 (en) | 2000-07-26 |
EP1021257B1 true EP1021257B1 (en) | 2002-01-23 |
Family
ID=8166695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97934493A Expired - Lifetime EP1021257B1 (en) | 1997-07-15 | 1997-07-15 | Method and plant for the production of frustoconical pipes |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1021257B1 (en) |
AT (1) | ATE212257T1 (en) |
AU (1) | AU3768597A (en) |
DE (1) | DE69710102D1 (en) |
WO (1) | WO1999003611A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005077562A1 (en) * | 2004-02-16 | 2005-08-25 | Han Young Machinerey Co, Ltd. | Method and apparatus for forming tapered steel pipe |
KR100847229B1 (en) | 2008-03-29 | 2008-07-18 | 주식회사 성훈이엔지 | The machine which to incline is formed to make the pipe |
KR20220051164A (en) | 2019-07-05 | 2022-04-26 | 아이오엠엑스 테라퓨틱스 아게 | Antibody binding IGC2 of IGSF11 (VSIG3) and uses thereof |
US20240010720A1 (en) | 2020-07-06 | 2024-01-11 | Iomx Therapeutics Ag | Antibodies binding igv of igsf11 (vsig3) and uses thereof |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3361319A (en) * | 1963-12-27 | 1968-01-02 | Yawata Iron & Steel Co | Apparatus for making hollow tubes of metal plates cut in advance |
US3452424A (en) * | 1966-06-13 | 1969-07-01 | American Mach & Foundry | Forming and welding tapered tubes |
US3648008A (en) * | 1968-12-11 | 1972-03-07 | Nippon Kokan Kk | Method of making tapered poles |
US4846392A (en) * | 1988-06-17 | 1989-07-11 | Hinshaw Experimental Laboratories Limited Partnership | Continuously variable speed, die-drawing device and process for metal, composites, and the like, and compositions therefrom |
-
1997
- 1997-07-15 AT AT97934493T patent/ATE212257T1/en not_active IP Right Cessation
- 1997-07-15 EP EP97934493A patent/EP1021257B1/en not_active Expired - Lifetime
- 1997-07-15 DE DE69710102T patent/DE69710102D1/en not_active Expired - Lifetime
- 1997-07-15 WO PCT/EP1997/003873 patent/WO1999003611A1/en active IP Right Grant
- 1997-07-15 AU AU37685/97A patent/AU3768597A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
ATE212257T1 (en) | 2002-02-15 |
DE69710102D1 (en) | 2002-03-14 |
WO1999003611A1 (en) | 1999-01-28 |
EP1021257A1 (en) | 2000-07-26 |
AU3768597A (en) | 1999-02-10 |
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