WO1999003611A1 - Method and plant for the production of frustoconical pipes - Google Patents
Method and plant for the production of frustoconical pipes Download PDFInfo
- Publication number
- WO1999003611A1 WO1999003611A1 PCT/EP1997/003873 EP9703873W WO9903611A1 WO 1999003611 A1 WO1999003611 A1 WO 1999003611A1 EP 9703873 W EP9703873 W EP 9703873W WO 9903611 A1 WO9903611 A1 WO 9903611A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- calibrating rollers
- rollers
- calibrating
- pipes
- Prior art date
Links
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 present invention relates to a method and a plant for the production of frustoconical pipes
- the active profile of the calibrating rollers therefore has the same frustoconical progression as the pipe which is to be calibrated prior to welding
- the pre-formed pipe is inserted with its smaller cross-section between the rollers, rotation of which causes feeding and simultaneous calibration of the profiled part, which is transformed into a welded frustoconical pipe in a welding station located immediately downstream of the calibration zone and mtended to perform fusion of the edges of the pipe
- Drawing means are also provided for feeding the pipe during welding, as well as pipe pushing means consisting of a motor-driven carnage which is movable on rails and pushes the pipe towards the calibrating rollers
- Pipe guiding means ensure that the pipe is kept correctly aligned and positioned during feeding in the welding station
- the calibrating rollers rotate in a horizontal plane about their vertical axis
- One of the two rollers is movable away from or towards the other one so as to be adapted to pipes of different dimensions and so as to adjust the pressure of the rollers on the pipe
- the profile of the calibrating rollers is such that it reproduces the comcity of the pipe and, therefore, viewing the calibrating roller from above, has a spiral-shaped progression
- the diameter D of the calibrating rollers is such that the measurement of the circumference, equal to ⁇ D, is equivalent to the maximum length L of the pipe which can be produced
- the feed speed of the pipe between the calibrating rollers is perfectly equal to the tangential speed of the calibrating rollers in the zone of tangency with the pipe
- the pipe keeps the upper profile constant, so as to be positioned in a horizontal plane, while the axis of the pipe obviously is inclined with respect to a horizontal plane
- a first drawback of the plant described above consists in the considerable dimensions
- calibrating rollers each with a diameter of about 4 5 - 6 5 m are necessary
- the extension of the profiles of the rollers imitates exactlv the comcity of the pipe, whenever it is required to manufacture pipes of different comcity the profiles of the rollers must be replaced, with a considerable loss of
- a further drawback consists in the need for precise synchronism of the feed speed of the pipe and rotation of the rollers in order to avoid intense friction between pipe and rollers
- An object of the present invention is that of eliminating the abovementioned drawbacks and providing a method and a plant for the production of frustoconical pipes, as a result of which smaller dimensions of the plant are possible and the production of pipes of varying comcity using the same profile of the rollers can be achieved
- a further object is that of obtaining savings terms of time and hence greater productivity owing to reduced stoppage times of the plant Said objects are fully achieved by the method and the plant which form the subject of the present invention and are characterized by the contents of the claims indicated below According to the method, the teed speed of the pipe between the calibrating rollers is different from, in particular greater than, the tangential speed of said
- the central axis of the pipe is kept at a constant level during feeding of the pipe, whereas the height at which welding is performed vanes
- the plant comprises two calibrating rollers having an extension of the active profile which is less than the length of the pipe to be formed and welded
- the ratio between the extension of the active profile of the calibrating rollers and the length of the pipe to be formed and welded is variable between 0 05 and 0 5, and preferably between 0 13 and 0 4
- the pipe 1 is supplied to a welding station 2, only schematically shown and of the known type, by means of a movable carriage 3 provided with wheels 5 and travelling on rails 4
- the movable carnage 3 car ⁇ es a die 6 which supports the bottom part of the pipe
- I e is shaped like the pipe, I e has the same comcity as the pipe so that the central axis of the pipe, indicated b ⁇ 7 in Figure 1, is at a constant level during feeding of the pipe and is preferably horizontal In this way the centre of the pipe remains stationary, while the working height of the welding station varies
- the pipe 1 which is loaded onto the support die 6, oriented with its bottom section towards the welding station, reaches a pair of vertical-axis calibrating rollers 8 rotating in a horizontal plane Said calibrating rollers 8 have an active profile interacting with the substantially spiral-shaped pipe Said profile, illustrated in Figure 3, in the situation relating to the bottom or initial section of the pipe (left-hand side in the Figure) and bigger or end section of the pipe (nght-hand side in the Figure), extends over about 90° for each calibrating roller, so that the profiles 9 of the two calibrating rollers together with the bottom profile of the die allow all the sections of the pipe, from the smallest to the largest, to be obtained
- each calibrating roller extends over about 180°, embracing half of the pipe which does not rest on a support mould, but is supported only at its ends, as illustrated in Figure 4, by support carnages 10 and 1 1
- ⁇ D is comprised between 0 05 L and 0 5 L and advantageously between 0 13 L and 0 4 L, so that, for example with calibrating rollers of 0 7 m diameter, operations mav be performed on poles of length between about 16 m and 5 ⁇ m. respectively
- the ratio between the feed speed of the pipe and the tangential speed of the calibrating roller is constant
- said ratio changes proportionally to the ratio between the length of the pipe and the extension part of the profile of the calibrating rollers interacting with the pipe (which in the case of "short" pipes is less than ⁇ D)
- the speed ratios between the pipe and the calibrating roller vary so as to be able to use the same calibrating roller for operations on pipes of varying length L and varying comcity
- the reduction in the length of the pipe is accompanied by an increase in the comcity, there is an increase in the speed of the calibrating rollers.
- the feed speed of the pipe between the calibrating rollers is greater than the peripheral speed of the rollers themselves and is adjusted so as to reduce the friction and ensure that the profiles of the rollers (if necessary completed by the profile of the base die 6) offer a sequence of sections corresponding to those of the pipe to be produced
- the movable carriage 3 advances towards the calibrating rollers, moved by a drive unit 12 which causes rotation of a pinion meshing on a rack mounted underneath the movable carnage
- feeding of the pipe is achieved by a drive unit which pushes the carriage 10 or pulls the carnage 1 1
- a drive unit which pushes the carriage 10 or pulls the carnage 1 1
- feeding of the pipe 1 is performed at a controlled speed far greater than the peripheral speed of the active profiles of the calibrating rollers
- the ratio between the feed speed of the pipe and the peripheral speed of the profiles of the calibrating rollers is a function of the comcity of the pipe, for the same calibrating rollers used and for the same pipe length
- de-beadmg a de-beading operation consisting in the mechanical removal of the excess material arising during the previous welding phase Since the centre of the pipe is kept constant, the position of the upper profile of the pipe is continuously detected so as to effect subsequently the vanation in level of the welding system which must be adapted to the variable level of the pipe and hence the welding zone Also the working heights of the de-beading means are varied After de-beading, the pipe is unloaded and the movable carriage or carnages return into the starting position for the loading of another profiled part to be calibrated and welded
- a plurality of electronic regulators and actuators of a substantially known type and not illustrated ensure perfect circula ⁇ tv in the closing section of the pipe performed by the calibrating rollers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
- Metal Extraction Processes (AREA)
- Heat Treatment Of Steel (AREA)
- Forging (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97934493A EP1021257B1 (en) | 1997-07-15 | 1997-07-15 | Method and plant for the production of frustoconical pipes |
PCT/EP1997/003873 WO1999003611A1 (en) | 1997-07-15 | 1997-07-15 | Method and plant for the production of frustoconical pipes |
AU37685/97A AU3768597A (en) | 1997-07-15 | 1997-07-15 | Method and plant for the production of frustoconical pipes |
DE69710102T DE69710102D1 (en) | 1997-07-15 | 1997-07-15 | METHOD AND SYSTEM FOR THE PRODUCTION OF CONICAL TUBES |
AT97934493T ATE212257T1 (en) | 1997-07-15 | 1997-07-15 | METHOD AND SYSTEM FOR PRODUCING CONICAL TUBES |
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 (1)
Publication Number | Publication Date |
---|---|
WO1999003611A1 true WO1999003611A1 (en) | 1999-01-28 |
Family
ID=8166695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/003873 WO1999003611A1 (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) |
Cited By (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 |
WO2021005009A1 (en) | 2019-07-05 | 2021-01-14 | Iomx Therapeutics Ag | Antibodies binding igc2 of igsf11 (vsig3) and uses thereof |
WO2022008027A1 (en) | 2020-07-06 | 2022-01-13 | Iomx Therapeutics Ag | Antibodies binding igv of igsf11 (vsig3) and uses thereof |
Citations (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 AU AU37685/97A patent/AU3768597A/en not_active Abandoned
- 1997-07-15 WO PCT/EP1997/003873 patent/WO1999003611A1/en active IP Right Grant
- 1997-07-15 DE DE69710102T patent/DE69710102D1/en not_active Expired - Lifetime
- 1997-07-15 EP EP97934493A patent/EP1021257B1/en not_active Expired - Lifetime
Patent Citations (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 |
Cited By (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 |
WO2021005009A1 (en) | 2019-07-05 | 2021-01-14 | Iomx Therapeutics Ag | Antibodies binding igc2 of igsf11 (vsig3) and uses thereof |
WO2022008027A1 (en) | 2020-07-06 | 2022-01-13 | Iomx Therapeutics Ag | Antibodies binding igv of igsf11 (vsig3) and uses thereof |
Also Published As
Publication number | Publication date |
---|---|
DE69710102D1 (en) | 2002-03-14 |
AU3768597A (en) | 1999-02-10 |
ATE212257T1 (en) | 2002-02-15 |
EP1021257B1 (en) | 2002-01-23 |
EP1021257A1 (en) | 2000-07-26 |
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