WO2022117287A1 - Verfahren zur herstellung von schlitzrohren - Google Patents
Verfahren zur herstellung von schlitzrohren Download PDFInfo
- Publication number
- WO2022117287A1 WO2022117287A1 PCT/EP2021/080968 EP2021080968W WO2022117287A1 WO 2022117287 A1 WO2022117287 A1 WO 2022117287A1 EP 2021080968 W EP2021080968 W EP 2021080968W WO 2022117287 A1 WO2022117287 A1 WO 2022117287A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- edges
- bending
- flat product
- metallic flat
- tool
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000005452 bending Methods 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 17
- 238000012937 correction Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 33
- 238000007654 immersion Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 abstract description 3
- 230000037431 insertion Effects 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 44
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
- B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
-
- 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
- B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
-
- 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
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- 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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/004—Bending sheet metal along straight lines, e.g. to form simple curves with program control
-
- 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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/006—Bending sheet metal along straight lines, e.g. to form simple curves combined with measuring of bends
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
Definitions
- the present invention relates to a method for producing open-seam tubes by forming flat metal products, in particular sheet metal, by gradually forming them in the circumferential direction of the open-seam tube to be produced by a plurality of individual bending steps using at least one bending tool and at least one external lower tool, and a open-seam tube produced according to method according to the invention.
- Thick-walled tubes for example for pipeline applications or the like, are usually manufactured by gradually forming flat products into a so-called slotted tube, in which the flat product is first formed over its entire length into the slotted tube, also known as the preliminary tube product, and then by inserting a longitudinal seam is welded.
- the flat product is generally formed in two steps, with a first forming leading to a preliminary product with a polygonal contour. An almost circular contour of the cross section is then achieved in a second step using an expander. With thick-walled pipes, however, there is a risk of overloading the expander tools.
- the flat product is bent in the above-mentioned formed locally in the first forming step and the finally desired shape of the workpiece is obtained by sequentially connecting many such forming operations.
- a device and a method for forming flat products into slotted tubes or tube pre-products are known, for example, from DE 10 2011 009 660 A1.
- the device comprises at least one internal forming tool for at least gradual forming of the flat product in the circumferential direction of the cross-section of the slotted tube or tubular pre-product to be produced, and at least one external forming tool for forming the flat product from the outside, with at least one light source and at least one receiver for measuring at least the slotted tube or Pipe precursor inner contour are connected to at least one internal forming tool.
- such a device By continuously tracking the results of contour measurements of individual forming steps, such a device allows efficient process management and controlled forming of the starting materials into the open-seam tubes with defined contours or shapes in such a way that deviations can be compensated for much more quickly and precisely and the formed sheet metal structures can be manufactured much more reliably and precisely .
- this type of control requires knowledge of the current pipe contour, which is recorded by the light-measuring systems. These have to be accommodated in the respective tools in a complex manner.
- the Chinese patent application CN 110102607 A discloses a method for producing slotted tubes using the so-called JCO process.
- a sequence of bending steps is determined for a tube, with each individual step of the multitude of bending steps being repeated several times starting from a "safe" offset, until a previously calculated distance of the step center to a point near the edge is reached or .until the measuring bridge used shows a pre-calculated radius. All subsequent slotted tubes are then manufactured on the basis of this sequence.
- the object of the present invention is to provide a method for the production of slotted tubes which is improved compared to the prior art, in particular to provide a method for the production of slotted tubes which allows regulation over the entire circumference.
- the object is achieved by a method having the features of claim 1.
- the method according to the invention for the production of slotted tubes from metallic flat products, in particular sheet metal it is provided that these are gradually deformed in the circumferential direction of the slotted tube to be produced by a plurality of individual bending steps using at least one bending tool and at least one external lower tool; firstly a plurality of positions of individual bending steps as well as the immersion depth of the bending tool are precalculated and on the basis of this precalculation the metallic flat product is then gradually formed into the slotted tube.
- the method is characterized in that after each of the plurality of bending steps, a setpoint/actual value distance comparison is carried out at at least one position along the longitudinal extent of the metallic flat product between the two edges and/or between one of the two edges and the axial center line of the metallic flat product and, if there is a deviation, a correction algorithm is used to determine a correction value for the subsequent bending step, by which the immersion depth for the bending tool is then adapted.
- the entire inner contour or a section of the inner contour is not recorded, as is usual in the prior art, but the behavior of the edges of the metallic flat product during the molding process to the slotted tube is controlled step by step by measuring the edge distance between both edges and /or the distance between one of the two edges and the axial center line of the metallic flat product is determined after each of the plurality of bending steps.
- a laser sensor system with a laser source and a laser detector and/or a computer-aided camera can advantageously be used, which carries out the distance measurement using a suitable evaluation program.
- the distance between the two edges and/or the distance between one of the two edges and the axial center line of the metallic flat product can be determined by ultrasound after each of the multiple bending steps.
- the target distance values for the entire forming process can be determined by precalculating the majority of positions of the individual bending steps and the respective required immersion depths. If there is a deviation, a correction algorithm can be used to determine a correction value for the subsequent bending step on the basis of this target position and the actual positions then determined, by which the required immersion depth for the bending tool is then adapted.
- a further advantage of the method according to the invention is that the correction can already be carried out after the first bending step, which is carried out using the bending tool, and thus one step earlier compared to the methods known from the prior art.
- this enables step-by-step real-time control, which ensures particularly high contour accuracy over the entire circumference.
- the high contour fidelity has a particularly advantageous effect the ovality, which can be kept in a particularly narrow parameter window as a result of the constant process control.
- the expander tools can be loaded more evenly, particularly in the case of thick-walled tubes with wall thicknesses of at least 6.0 mm, preferably at least 15.0 mm, more preferably at least 20.0 mm or more that the risk of overloading them is reduced.
- edge is understood to mean an end face of the flat metal product which extends along the longitudinal extent of the flat metal product.
- the at least one edge, preferably both edges, of the metallic flat product can in principle be designed as a straight edge, including one perpendicular to one of the two lateral surfaces of the metallic Flat product trained end face is understood. Such an edge then has two edge points that can be detected by sensors.
- the at least one, more preferably both edges, of the metallic flat product has a geometry optimized for the subsequent welding process, which comprises two, three or n partial end faces, with two partial end faces adjacent to one another enclosing an angle.
- An edge formed in this way then has at least three, four, or n edge points that can be detected by sensors in order to determine the distances between the two edges and/or between one of the two edges and the axial center line of the metallic flat product.
- Which of the edge points are then considered in relation to each other can vary from step to step depending on the accessibility or recognizability of these by a laser sensor system and/or a computer-aided camera unit.
- the present method is suitable for a particularly wide range of production.
- the metallic flat products therefore advantageously have a width of 0.2 to 10 m, more preferably a width of 0.8 to 8 m, and most preferably a width of 1.0 to 6.0 m, and a thickness of 5.0 to 100 mm, more preferably a thickness of 6.0 to 50 mm.
- width is understood to mean the radial extent of the metallic flat product along which the slotted tube to be produced is formed by the majority of the bending steps.
- the setpoint/actual value distance comparison is carried out at at least two, more preferably at least three, even more preferably at several positions along the longitudinal extension of the metallic flat product between the two edges and/or between one of the two edges and the axial center line of the metallic Made flat product, so that an independent regulation is made possible in sections over the axial length of the slotted tube to be produced.
- the measurement results of the actual value distance between the two edges and/or between one of the two edges and the axial center line of the metallic flat product are transmitted to a control unit, which then carries out the setpoint/actual value distance comparison and, in the event of a deviation, by means of a correction value for the subsequent bending step is determined by the correction algorithm, as a result of which the control unit controls and regulates fully automatic forming of the metallic flat product into the slotted tube.
- the actual value distance between the two edges and/or one of the two edges and the axial center line is particularly advantageously carried out by a laser sensor system and/or a computer-aided camera unit, which is particularly preferably connected to the control unit via signals.
- the present invention also relates to a slotted tube produced by the method according to the invention.
- Figure 2 shows the measuring principle according to the invention in a first
- FIG. 3 shows the measuring principle according to the invention in a second
- FIGS. 5a to 5c show results from a first practical example.
- the basic principle for producing a slotted tube 1 from a metallic flat product 2 is shown with reference to FIGS. 1a to 1h using eight individual working or bending steps.
- the metallic flat product 2 is formed step by step in the circumferential direction of the slotted tube 1 to be produced by a plurality of individual bending steps using at least one bending tool 3 and two external lower tools 4 .
- step a the flat product 2 is presented with already preformed edge regions 5a, 5b.
- the edge regions 5a, 5b are usually formed in advance by means of a non-illustrated forming press.
- step b) shows, the forming process begins by threading the metallic flat product 2 between two counter bearings 4a, 4b of the lower tool 4 and the bending tool 3, which includes a shank 3a and a bending punch 3b.
- the bending tool 3 can be displaced between the two counter bearings 4a, 4b in strokes essentially perpendicularly towards the flat product 2.
- the insertion then takes place through the interaction of the counter bearings 4a, 4b and the bending punch 3b local deformations into the flat product 2.
- steps a) to d) While in steps a) to d) the first side of the flat product 2 is deformed into a slotted tube cross-section, in steps e) to h) the gradual deformation of the right-hand side of the flat product 2 is the slotted tube 1 shown.
- Both forming processes usually take place as a series of a large number of local forming steps inward from the side edges 5a, 5b.
- FIG. 2 shows an embodiment variant of the measuring principle.
- the laser sensor system 8 detects a detectable edge point 9a, 9b of the respective edge 6a, 6b.
- each of the edges 6a, 6b of the metallic flat product has a plurality of partial end faces 10a, 10b.
- two mutually adjacent partial end faces 10a, 10b enclose an angle and each form an edge point 9a, 9b, which can be detected by the laser sensor system 8 in order to measure the actual distance between the two edges 6a, 6b and/or between one of the two edges 6a and the axial center line 7 of the metallic flat product 2 to be determined.
- a metal sheet with the dimensions (L x W x H) 10000 x 2554 x 12.7 mm had a yield point of 600 MPa.
- a universal bending die with a radius of 120 mm was used as the bending die.
- edge areas were then first formed in a conventional manner using a forming press.
- the sheet metal was then threaded between the bending tool and the lower tool with two counter bearings, whereupon the individual bending steps 1 to 17 were carried out as calculated (FIG. 3a). Since the sheet metal is not ideal over the area in terms of material thickness as well as in terms of its yield point, as assumed in the pre-calculation, the entire forming process in the comparative example resulted in a deviation of over 3% in the slot width.
- a setpoint/actual value distance comparison took place.
- the distance between the two edge points 9a, 9b and also between the edge point 9a and the center line 7 was determined using the laser sensor system, as shown in FIGS.
- the determined distances were compared with the previously calculated target distances, whereupon a correction value for the subsequent second bending step was determined using a correction algorithm (see FIG. 5a).
- the immersion depth of the second bending step was then increased by the correction value adjusted as shown in Figure 5a.
- the subsequent bending steps 3 to 17 were carried out in the same way.
- Table 1 shows the results from the comparative example and the example according to the invention against the background of the theoretically calculated values. As can be seen from Table 1, the positive influence of the method according to the invention on the contour of the slotted tube can be clearly seen.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/039,341 US20230415213A1 (en) | 2020-12-01 | 2021-11-08 | Method for producing open-seam pipes |
CN202180081215.9A CN116600910A (zh) | 2020-12-01 | 2021-11-08 | 用于制造开缝管的方法 |
KR1020237016336A KR20230088441A (ko) | 2020-12-01 | 2021-11-08 | 개방 이음매 관의 제조 방법 |
JP2023533318A JP2023554252A (ja) | 2020-12-01 | 2021-11-08 | スリット管を製造する方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020215088.5 | 2020-12-01 | ||
DE102020215088.5A DE102020215088A1 (de) | 2020-12-01 | 2020-12-01 | Verfahren zur Herstellung von Schlitzrohren |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022117287A1 true WO2022117287A1 (de) | 2022-06-09 |
Family
ID=78621891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/080968 WO2022117287A1 (de) | 2020-12-01 | 2021-11-08 | Verfahren zur herstellung von schlitzrohren |
Country Status (6)
Country | Link |
---|---|
US (1) | US20230415213A1 (de) |
JP (1) | JP2023554252A (de) |
KR (1) | KR20230088441A (de) |
CN (1) | CN116600910A (de) |
DE (1) | DE102020215088A1 (de) |
WO (1) | WO2022117287A1 (de) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012092909A1 (de) * | 2011-01-07 | 2012-07-12 | Technische Universität Dortmund | Verfahren zum inkrementellen umformen von blechstrukturen, insbesondere zum umformen von rohren oder dgl. |
DE102011009660A1 (de) | 2011-01-27 | 2012-08-02 | Sms Meer Gmbh | Automatisierung Rohrformpresse |
EP3000542A1 (de) * | 2013-05-20 | 2016-03-30 | JFE Steel Corporation | Biegepressvorrichtung, biegepressverfahren, vorrichtung zur herstellung eines stahlrohrs und verfahren zur herstellung eines stahlrohrs |
EP3006128A1 (de) * | 2013-05-29 | 2016-04-13 | JFE Steel Corporation | Verfahren zur herstellung eines lasergeschweissten stahlrohrs |
JP6028931B2 (ja) * | 2013-10-07 | 2016-11-24 | Jfeスチール株式会社 | 鋼管の製造方法およびその製造装置 |
CN110102607A (zh) | 2019-04-29 | 2019-08-09 | 中国石油集团渤海石油装备制造有限公司 | Jco钢管成型调型工艺 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE3632952A1 (de) | 1986-09-27 | 1988-04-07 | Hoesch Ag | Verfahren und vorrichtung zur kontinuierlichen herstellung rohrfoermiger koerper mittels laser-laengsnahtschweissung |
EP2529849B1 (de) | 2011-05-31 | 2021-03-10 | SMS group GmbH | Verfahren und Vorrichtung zum Herstellen von Schlitzrohren aus Blechtafeln |
RU2543657C1 (ru) | 2013-10-30 | 2015-03-10 | Публичное акционерное общество "Северсталь" ПАО "Северсталь") | Способ производства прямошовных магистральных труб |
DE102018211311B4 (de) | 2018-07-09 | 2020-03-26 | Sms Group Gmbh | Erweiterte Regelung JCO-Formpresse |
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2020
- 2020-12-01 DE DE102020215088.5A patent/DE102020215088A1/de active Pending
-
2021
- 2021-11-08 US US18/039,341 patent/US20230415213A1/en active Pending
- 2021-11-08 JP JP2023533318A patent/JP2023554252A/ja active Pending
- 2021-11-08 CN CN202180081215.9A patent/CN116600910A/zh active Pending
- 2021-11-08 WO PCT/EP2021/080968 patent/WO2022117287A1/de active Application Filing
- 2021-11-08 KR KR1020237016336A patent/KR20230088441A/ko active Search and Examination
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2012092909A1 (de) * | 2011-01-07 | 2012-07-12 | Technische Universität Dortmund | Verfahren zum inkrementellen umformen von blechstrukturen, insbesondere zum umformen von rohren oder dgl. |
DE102011009660A1 (de) | 2011-01-27 | 2012-08-02 | Sms Meer Gmbh | Automatisierung Rohrformpresse |
EP3000542A1 (de) * | 2013-05-20 | 2016-03-30 | JFE Steel Corporation | Biegepressvorrichtung, biegepressverfahren, vorrichtung zur herstellung eines stahlrohrs und verfahren zur herstellung eines stahlrohrs |
EP3006128A1 (de) * | 2013-05-29 | 2016-04-13 | JFE Steel Corporation | Verfahren zur herstellung eines lasergeschweissten stahlrohrs |
JP6028931B2 (ja) * | 2013-10-07 | 2016-11-24 | Jfeスチール株式会社 | 鋼管の製造方法およびその製造装置 |
CN110102607A (zh) | 2019-04-29 | 2019-08-09 | 中国石油集团渤海石油装备制造有限公司 | Jco钢管成型调型工艺 |
Non-Patent Citations (2)
Title |
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THOME MARIO ET AL: "Calculation tool and closed loop control for the JCO pipe forming process", PROCEDIA ENGINEERING, vol. 207, 22 September 2017 (2017-09-22), pages 1605 - 1610, XP085261637, ISSN: 1877-7058, DOI: 10.1016/J.PROENG.2017.10.1056 * |
THOME MARIO ET AL: "On course to smart large-diameter pipe production", PROCEDIA MANUFACTURING, vol. 29, 16 April 2019 (2019-04-16), 43rd North American Manufacturing Research Conference, NAMRC 43, 8-12 June 2015, UNC Charlotte, North Carolina, United States, pages 544 - 551, XP055890641, ISSN: 2351-9789, Retrieved from the Internet <URL:https://www.sciencedirect.com/science/article/pii/S2351978919301726/pdf?md5=4cc835bc33160ecf51a2e488dc58f7d7&pid=1-s2.0-S2351978919301726-main.pdf> [retrieved on 20220210], DOI: 10.1016/j.promfg.2019.02.139 * |
Also Published As
Publication number | Publication date |
---|---|
KR20230088441A (ko) | 2023-06-19 |
DE102020215088A1 (de) | 2022-06-02 |
JP2023554252A (ja) | 2023-12-27 |
US20230415213A1 (en) | 2023-12-28 |
CN116600910A (zh) | 2023-08-15 |
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