EP1792669B1 - Punch device for u-press in uoe steel tube manufacturing process - Google Patents

Punch device for u-press in uoe steel tube manufacturing process Download PDF

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Publication number
EP1792669B1
EP1792669B1 EP05730463A EP05730463A EP1792669B1 EP 1792669 B1 EP1792669 B1 EP 1792669B1 EP 05730463 A EP05730463 A EP 05730463A EP 05730463 A EP05730463 A EP 05730463A EP 1792669 B1 EP1792669 B1 EP 1792669B1
Authority
EP
European Patent Office
Prior art keywords
press
punch
pipe
faces
punch device
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.)
Not-in-force
Application number
EP05730463A
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German (de)
English (en)
French (fr)
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EP1792669A1 (en
EP1792669A4 (en
Inventor
Hidenori Shitamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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Filing date
Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Publication of EP1792669A1 publication Critical patent/EP1792669A1/en
Publication of EP1792669A4 publication Critical patent/EP1792669A4/en
Application granted granted Critical
Publication of EP1792669B1 publication Critical patent/EP1792669B1/en
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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
    • 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

Definitions

  • the present invention relates to a punch device for U-press in UOE steel pipe manufacturing process.
  • UOE steel pipe is a pipe or tube (hereinafter, refer to "pipe” as “pipe or tube”) used for line pipe for transporting mainly petroleum, natural gas, and the like.
  • the name of UOE comes from its representative manufacturing process.
  • UOE steel pipe manufacturing process which consists of about 20 major processes includes a crimping process (C-process) to bend the end of a steel plate, a U-process to obtain U-shaped pipe, and O-process to obtain hollow cylindrical pipe. A steel plate processed by such manufacturing processes is then treated with a welding process, an expanding (Expander) process, and an inspection process to become an end-product (UOE steel pipe).
  • C-process of the UOE steel pipe is a crimping process to bend the vicinity of end of a steel plate in the width direction in proportion to the diameter of the pipe. Its object is to reduce the load for forming in O-process and to minimize the peaking which is a remaining steel-plate end as a flat portion.
  • the flat plate having crimped-end is formed into U-shaped pipe by using a press (U-press) having self-opening dies, and is formed into a shape capable of being transported into an apparatus for 0-process.
  • U-press press
  • O-press press
  • UOE steel pipes manufactured through such processes as the size of pipe product is varied, usually need to change the tool in each step of C-process, U-press, O-press, and pipe expansion depend on the size of pipe product. But, it takes long time to change U-punches for U-press apparatus, and it costs enormously if U-punches need to be made per each pipe product size. Thus, a U-punch which is capable of coping with plural manufacturing pipe sizes is needed.
  • Patent Document 1 discloses an art relates to a U-punch device which is possible to telescopically adjust the punch dimensions by adjusting the cylinder accompanying with the U-punch. According to this U-punch device, when (two or more) pipes whose manufacturing pipe sizes are approximate each other, punch exchange is not necessary. Moreover, it says, processing by using this device makes it possible to keep the shape of pipe after U-press constant.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 55-070420
  • the punch incorporated in the U-punch device disclosed in Patent Document 1 simply has two types of punches having different curvature radiuses each other. So, when a rocker assembly type U-press is used, the punch can not provide enough curvature to the pipe.
  • an object of the present invention is to provide a punch device for U-press in UOE steel pipe manufacturing process, which is capable of coping with various manufacturing pipe sizes and reducing the width of U-shaped pipe less than that by a conventional punch device for U-press.
  • the invention is disclosed in claim 1.
  • the present invention of claim 1 is a punch device for U-press (100) in UOE steel pipe manufacturing process.
  • This device comprises a first punch part (10) having semi-cylindrical press faces (11), (11) on both side-faces, a second punch part (20) disposed in contact with the lower side of the first punch part (10) and having semi-cylindrical press faces (21), (21) on both side-faces, which are the same as or different from that of the press faces (11), a third punch part (30) disposed in contact with the lower side of the second punch part (20) and having downward semi-cylindrical press face (31).
  • this invention provides the punch device for U-press (100), so as to solve the above-mentioned problems.
  • the invention of claim 2 is a punch device for U-press (100) according to claim 1, wherein the first punch part (10) and/or the second punch part (20) are/is capable of enlarging or reducing the distance between the press faces (11) and (11) and/or the distance between the press faces (21) and (21).
  • a punch device for U-press (100) which is capable of reducing the width of U-shaped pipe after U-press less than that by a conventional punch device for U-press, and which is capable of coping with various manufacturing pipe sizes.
  • a punch device for U-press in UOE steel pipe manufacturing process which is capable of coping with various manufacturing pipe sizes and reducing the width of U-shaped pipe after U-press less than that by a conventional punch device for U-press.
  • Fig.1 is a schematic view showing an embodiment of a punch device of the present invention
  • FIG.1 is a schematic view showing an embodiment of a punch device for U-press of the present invention.
  • a punch device for U-press 100 of the present invention comprises a first punch part 10, a second punch part 20, and a third punch part 30.
  • the first punch part 10 has semi-cylindrical press faces 11, 11 of curvature radius R1 on both side-faces.
  • the second punch part 20 which is disposed in contact with the lower side of the first punch part 10 has semi-cylindrical press faces 21, 21 of curvature radius R2 on both side-faces.
  • Fig. 2 is a schematic view of the width of U-shaped pipe.
  • width of U-shaped pipe means a maximum width of U-shaped pipe 5, which is perpendicular to the pipe-axis direction of U-shaped pipe 5 and is in the horizontal direction.
  • the conventional punch device includes: a pair of punch A having semi-cylindrical steel-pipe press faces, and a punch B having downward semi-cylindrical steel-pipe press faces, wherein a curvature radius of press faces in the pair of punch A is at least larger than the above R1 and R2.
  • a schematic view showing a rocker assembly type U-press using a conventional punch device is shown in Fig.4 .
  • This type of U-press has a punch device and a pair of rocker dies 50, 50 to be used for processing U-shaped pipe 45.
  • the pair of rocker dies 50, 50 respectively have rocker shoes 51, 52, and rotation center 53 immobile during processing operation.
  • the shape of side part i.e., an area from a part where the U-shaped pipe is in contact with the punch A to the U-shaped pipe end.
  • U-shaped pipe 45 is determined by the press faces provided for a pair of rocker dies 50, 50 and a pair of punch A, it is difficult to sufficiently deform the side parts of U-shaped pipe 45.
  • the U-shaped pipe 45 being processed by a conventional punch device consists of high-strength material
  • degree of its spring back after U-press tends to be larger.
  • the degree of spring back becomes larger, it becomes difficult to transport the U-shaped pipe after U-press into the O-press apparatus; this eventually lowers the steel-pipe productivity.
  • it says that reducing the width of U-shaped pipe sufficiently in U-process makes it possible to obtain a U-shaped pipe which is capable of being transported into the O-press apparatus after U-process.
  • a U-shaped pipe which is capable of being transported into the O-press apparatus is obtained, by carrying out U-press with use of punch device having three types of punch parts to reduce the width of U-shaped pipe after U-press less than that by a conventional punch device for U-press.
  • FIG.5 A schematic view showing a rocker assembly type U-press using a punch device 100 of the invention is shown in Fig.5 .
  • a steel plate treated with C-process is deformed such that the cross-section becomes U-shape by the punch device 100 and rocker dies 50, 50.
  • the punch device 100 of the invention has three punch parts 10, 20, and 30; meanwhile, the rocker dies 50, 50 respectively have rocker shoes 51, 52 and a rotation center 53 immobile during processing operation.
  • side parts of the U-shaped pipe 5 is deformed by a pair of press faces 11, 11 provided for punch part 10, and a pair of press faces 21, 21 provided for punch part 20, as well as rocker shoes 51, 51 and 52, 52.
  • the curvature radiuses R1 of the press faces provided for the punch part 10 and the curvature radiuses R2 of the press faces provided for the punch part 20 are smaller than that of press faces of the punch (hereinafter, described as "punch A") of the conventional device which deforms side-faces of U-shaped pipe.
  • the punch device 100 can provide bending to a part nearer to the end of U-shaped pipe by the press faces 11, 11 provided for the punch 10. For these reasons, if U-press is carried out with use of punch device 100 of the invention, the side parts of U-shaped pipe 5 is effectively deformed. Consequently, it is capable of restraining the degree of spring back of U-shaped pipe and reducing the width of a U-shaped pipe.
  • the punch device 100 of the invention includes punch parts 10 and 20 having press faces with a smaller size of curvature radius than that of punch A, even though steel pipes of different sizes (such as thickness) and materials are to be produced, enlarging or reducing the distance between the press faces of punch part 10 and the distance between the press faces of punch part 20 is simply sufficient to adjust the device. Therefore punch A is not needed to be replaced to other one which has a smaller size of curvature radius.
  • U-press is carried out by the punch device for U-press 100 of the invention, it is possible to easily reduce the width of U-shaped pipe less than that by a conventional punch device for U-press.
  • U-shaped pipe process is carried out with use of the punch device 100 of the invention, it is capable of reducing the width of a U-shaped pipe less than that by a conventional punch device for U-press. Thereby, a U-shaped pipe after U-press is easily transported into O-press apparatus, which makes it possible to improve the steel pipe productivity.
  • the punch device for U-press 100 of the invention may be an integrated punch device having punch parts 10, 20, and 30.
  • it may also be a punch device consists of plural components being provided with different pieces per punch part.
  • FIG.6 A schematic view showing a rocker assembly type U-process using a punch device 100 of the invention is shown in Fig.6 .
  • a steel plate, which end is crimped by C-process, is transported in between a pair of rocker dies 50, 50 and a punch device 100. And, the plate is put between rocker shoes 51, 51 of the rocker dies and a third punch part 30 (referred to Fig.6 (a) ). Then, the punch device 100 moves in downward direction (direction of gravitational force) to gradually process the steel plate into U-shaped pipe (referred to Fig.6 (b) ).
  • a punch device 200 of the invention includes a first punch part 10, a second punch part 20, and a third punch part 30.
  • the first punch part 10 and the second punch part 20 disposed in contact with the lower side of the first punch part 10 is capable of enlarging or reducing the distance between press faces 11 and 11 having semi-cylindrical press faces of curvature radius R1, and the distance between press faces 21 and 21 having semi-cylindrical press faces of curvature radius R2, respectively.
  • the press faces 11 and 11 are provided to both sides of the first punch part 10, and the press faces 21 and 21 are also provided to both sides of the second punch part 20.
  • the third punch part 30 disposed in contact with the lower side of the second punch part 20 has a downward semi-cylindrical press face 31 of curvature radius R3.
  • a vertical direction in Fig.7 is described as "pipe-axis direction" of the U-shaped pipe being U-pressed by the punch device.
  • a right-and-left direction in Fig.7 is described as "right-and-left direction” of a U-shaped pipe.
  • a punch device 200 of the invention includes a first screw 15 and a second screw 25 at a respective end of the first punch part 10 and the second punch part 20 in the pipe-axis direction as a means for moving punch.
  • the distance between press faces 11 and 11 of the first punch part 10, and the distance between press faces 21 and 21 of the second punch part 20 can be enlarged or reduced by rotating the first screw 15 and the second screw 25.
  • each press face can be moved in a direction where the distance between a pair of press faces 11 and 11, and the distance between a pair of press faces 21 and 21 are enlarged, by rotating the screw 15 and 25, respectively, in clockwise direction.
  • each press face can be moved in a direction where the distance between a pair of press faces 11 and 11, and the distance between a pair of press faces 21 and 21 are reduced, by rotating the screw 15 and 25, respectively, in anti-clockwise direction.
  • An embodiment of the punch device 200 of the invention is not limited to the embodiment which is capable of enlarging or reducing the distance between the press faces of the first punch part 10 and the distance between the press faces of the second punch part 20. It may be another embodiment which is capable of enlarging or reducing the distance between press faces of either of the first punch part 10 or the second punch part 20.
  • a punch device 200 such that two or less punch parts are able to enlarge or reduce the distance between press faces can be obtained.
  • the direction of the press face movement is defined as right-and-left direction of U-shaped pipe, it is possible to easily deform U-shaped pipes of the various manufacturing pipe sizes by using the single punch device 200.
  • the punch device 200 has three punch parts 10, 20, and 30, similar to the punch device 100 of the first embodiment of the invention, it is also possible to reduce the degree of spring back of the pipe after U-press.
  • the punch device for U-press 200 in UOE steel pipe manufacturing process, which is capable of coping with various manufacturing pipe sizes and reducing the width of U-shaped pipe after U-press less than that by a conventional punch device for U-press.
  • the relation between the direction of screw rotation and the direction of press face movement is not limited by the embodiments described above.
  • means for moving punch provided to the punch device for U-press of the invention is not limited to screws, any kind of means which is capable of moving each punch effectively can be suitably used.
  • the punch device for U-press 200 of the invention may be an integrated punch device having punch parts 10, 20, and 30.
  • it may also be a punch device consists of plural components being provided with different pieces per punch part.
  • test steel-pipe 1 a UOE steel pipe with its outer diameter 609.6mm, thickness 14mm
  • test steel-pipe 2 a UOE steel pipe with its outer diameter 711.2mm, thickness 14mm
  • a punch device for U-press applying the invention includes the first punch part 10 having a pair of semi-cylindrical press faces of curvature radius R1, the second punch part 20 having a pair of semi-cylindrical press faces of curvature radius R2, and the third punch part 30 having a downward semi-cylindrical press face of curvature radius R3, as well as the first screw 15 and the second screw 25.
  • X1 and X2 in Fig.8 mean amount of movement of press faces (sliding amount) in horizontal direction at the first punch part 10 and the second punch part 20.
  • Curvature radius R1, R2, and R3 of each punch part of the punch device used in this example, as well as a sliding amount X1 of the first punch part 10 and a sliding amount X2 of the second punch part 20 are shown in Table 1.
  • Test steel-pipe 1 Test steel-pipe 2 R 1 (mm) 130 130 R 2 (mm) 125 125 R 3 (mm) 120 120 X 1 (mm) -20 30 X 2 (mm) -10 15
  • value of X1 and X2 are positive, it means that each punch part was moved towards the direction where the distance between a pair of press faces of each punch part was enlarged (hereinafter, described as “enlarging direction”).
  • value of X1 and X2 are negative, it means that each punch part was moved towards the opposite direction to the direction previously described (hereinafter, described as "reducing direction”).
  • U-press was carried out against two test steel-pipes by using the single punch device, curvature radius of press faces of each punch part provided for the punch device for test steel-pipe 1 is same as that for test steel-pipe 2.
  • Test steel-pipe 1 Test steel-pipe 2 r 1 (mm) 190 230 r 2 (mm) 110 140
  • r1 and r2 respectively represent curvature radius of press faces of punch A and punch B shown in Fig.3 .
  • the punch device used under condition 1 included the first punch part 10 having a pair of press faces movable and the second punch part 20 having a pair of press faces movable. So, when pressing against test steel-pipe 1 was carried out, the pair of press faces at each punch part was moved to the reducing direction. Also, when pressing against test steel-pipe 2 was carried out, the pair of press faces at each punch part was moved to the enlarging direction. By moving each press face in this manner, the punch device of the invention according to the example was able to coping with plural manufacturing pipe sizes. In addition, even though the manufacturing pipe sizes were different, the punch device of the invention does not need to change its punch parts.
  • this example could save the time for punch change due to the change of manufacturing pipe sizes, which conventional punch devices needed.
  • the punch device used under condition 2 (hereinafter, described as "comparative example”.) in itself could not cope with two steel pipes (test steel-pipes 1 and 2). So, every time the manufacturing pipe sizes were different, the punch needed to be changed. Hence, time for changing punches was necessary.
  • Width of U-shaped pipe after U-press according to the example and the comparative example are shown in Table 3.
  • Table 3 standardized values provided by dividing the width of U-shaped pipe by a width of O-press device are shown.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP05730463A 2004-04-21 2005-04-14 Punch device for u-press in uoe steel tube manufacturing process Not-in-force EP1792669B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004125470A JP4479327B2 (ja) 2004-04-21 2004-04-21 Ｕｏｅ鋼管製造工程におけるｕプレス用ポンチ装置
PCT/JP2005/007219 WO2005102549A1 (ja) 2004-04-21 2005-04-14 Uoe鋼管製造工程におけるuプレス用ポンチ装置

Publications (3)

Publication Number Publication Date
EP1792669A1 EP1792669A1 (en) 2007-06-06
EP1792669A4 EP1792669A4 (en) 2007-11-28
EP1792669B1 true EP1792669B1 (en) 2011-05-25

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Application Number Title Priority Date Filing Date
EP05730463A Not-in-force EP1792669B1 (en) 2004-04-21 2005-04-14 Punch device for u-press in uoe steel tube manufacturing process

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EP (1) EP1792669B1 (ja)
JP (1) JP4479327B2 (ja)
CN (1) CN100415401C (ja)
AT (1) ATE510637T1 (ja)
WO (1) WO2005102549A1 (ja)

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KR101461748B1 (ko) 2012-12-24 2014-11-13 주식회사 포스코 조관 방법 및 c 성형기
KR101382788B1 (ko) 2012-12-27 2014-04-17 주식회사 포스코 조관 방법 및 ｃ 성형기
BR112017010436B1 (pt) * 2014-11-25 2021-10-26 Jfe Steel Corporation Método para fabricação de tubo de aço e molde de prensa usado no dito método
DK3165297T3 (en) * 2015-11-03 2019-04-29 Ssab Technology Ab BENDING PROCEDURE
JP6729011B2 (ja) * 2016-06-06 2020-07-22 日本製鉄株式会社 閉断面構造部材の製造方法及びｏ成形用上型
AT520930B1 (de) * 2018-06-29 2019-09-15 Voestalpine Prec Strip Gmbh Verfahren zur Herstellung eines Bandstahlmessers und Bandstahlmesser für Werkzeuge
JP7341424B2 (ja) * 2019-10-03 2023-09-11 株式会社キーレックス 金属管成形装置
JP7226367B2 (ja) * 2020-02-12 2023-02-21 トヨタ自動車株式会社 パイプの製造方法
CN112355101B (zh) * 2021-01-12 2021-03-26 滨州医学院烟台附属医院 医疗支架用折弯装置

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JPS6043813B2 (ja) * 1978-11-22 1985-09-30 新日本製鐵株式会社 厚肉ｕｏ鋼管成形法
JP2002086213A (ja) * 2000-09-13 2002-03-26 Nkk Corp 溶接鋼管の成形方法および装置
CN2468708Y (zh) * 2001-02-26 2002-01-02 王及元 U成型压力机

Also Published As

Publication number Publication date
JP2005305501A (ja) 2005-11-04
WO2005102549A1 (ja) 2005-11-03
JP4479327B2 (ja) 2010-06-09
EP1792669A1 (en) 2007-06-06
ATE510637T1 (de) 2011-06-15
CN100415401C (zh) 2008-09-03
EP1792669A4 (en) 2007-11-28
CN1942261A (zh) 2007-04-04

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