WO2005102549A1 - 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 PDFInfo
- Publication number
- WO2005102549A1 WO2005102549A1 PCT/JP2005/007219 JP2005007219W WO2005102549A1 WO 2005102549 A1 WO2005102549 A1 WO 2005102549A1 JP 2005007219 W JP2005007219 W JP 2005007219W WO 2005102549 A1 WO2005102549 A1 WO 2005102549A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- punch
- press
- tube
- pipe
- present
- Prior art date
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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 U-press punch device used in a process of manufacturing a steel pipe manufactured by the UOE method.
- UOE steel pipe is a steel pipe mainly used for a line pipe for a pipeline for transporting oil, natural gas, and the like, and its name is derived from a typical manufacturing process of the steel pipe.
- the manufacturing process of UOE steel pipe which is roughly divided into about 20 processes, is a process of applying a bent tube to the end of a steel plate, a process of obtaining a U tube by U tube, and The process includes the process of obtaining an open pipe by O-processing, and the steel plate processed by these processes becomes a product (UOE steel pipe) through a welding process, an expanding process, an inspection process, and the like.
- the C processing step of UOE steel pipe is a step of performing bending work near the end in the width direction of the steel sheet in accordance with the diameter of the steel pipe. It aims to suppress peaking that remains as a part.
- the flat plate is processed into a U-tube shape using a press having an open die (U press), so that the plate can be conveyed into the equipment in the O processing step.
- U press open die
- a U-tube after the U processing step is formed into an O shape using a press having a closing die (O press).
- O press a press having a closing die
- Patent Literature 1 discloses a technique relating to a U-punch device capable of freely adjusting the dimensions of a punch by adjusting a cylinder attached to the U-punch. According to this U-punch device, punches need not be replaced when manufacturing tubes with similar steel pipe sizes, and if processed with this device, the shape of the tubes after u-pressing can be maintained constant. I have.
- Patent Document 1 JP-A-59-109116
- the present invention provides a UOE steel pipe manufacturing method capable of supporting various pipe sizes and reducing the width of the U pipe after the U press as compared with a conventional punch machine for a U press. It is an object of the present invention to provide a punching device for U-presses in the process.
- a press punching device (100) comprising a first punch portion (10) having semi-cylindrical press surfaces (11) and (11) on both sides, and a lower portion of the first punch portion (10).
- the second punch part (20) which is arranged and has a semi-cylindrical press surface (21), which is the same or different from the press surface (11), on both sides, and under the second punch part (20).
- the above-mentioned object is achieved by a punching device (100) for U-press, characterized by having a third punching part (30) provided in contact with and having a downward semi-cylindrical press surface (31). .
- the U-punch punch device (100) is capable of reducing the U-tube width after the U-press as compared with the conventional U-press punch device. Can be provided.
- the invention described in claim 2 is a punching device (100) for a U press according to claim 1, wherein the first punch portion (10) and the Z or the second punch portion (20) are provided. ) Pressing surface (11), (11) and ⁇ or (21), (21) The distance between (21) can be enlarged or reduced.
- a UOE steel pipe manufacturing process capable of coping with various pipe sizes and reducing the U pipe width after U pressing compared to a conventional U punch device.
- a pressing punch device can be provided.
- FIG. 1 is a schematic view showing an embodiment of a punch device of the present invention.
- FIG. 2 is a schematic diagram of a U pipe width.
- FIG. 3 is a schematic view showing an example of a form of a conventional punch device.
- FIG. 4 is a view showing an embodiment of a U-press using a conventional punch device.
- FIG. 5 is a view showing a form example of a U press using the punch device of the present invention.
- FIG. 6 is a schematic view of a U machining process using the punch device of the present invention.
- FIG. 7 is a schematic view showing an embodiment of a punch device of the present invention.
- FIG. 8 is a schematic view of a U-press punch device to which the present invention is applied.
- FIG. 1 is a schematic view showing a first embodiment of the present invention, which is applied to a U-press punch device.
- the punch device 100 for U-press of the present invention includes a first punch portion 10, a second punch portion 20, and a third punch portion 30.
- the first punch section 10 has semi-cylindrical press surfaces 11 and 11 having a radius of curvature R1 on both sides, and the second punch section 20 disposed below and in contact with the first punch section 10 has a radius of curvature.
- R2 semi-cylindrical press surfaces 21, 21 are provided on both sides.
- the third punch portion 30 is disposed below and in contact with the second punch portion 20, and has a downward semi-cylindrical press surface 31 having a radius of curvature of 3.
- FIG. 2 shows a schematic diagram of the U-tube width.
- the U pipe width means the maximum width of the U pipe 5 in a direction perpendicular to the pipe axis direction of the U pipe 5 and in a horizontal direction.
- FIG. 3 schematically shows a configuration example of a conventional punch device in order to facilitate the description of the punch device in the present invention.
- the conventional punch device includes a pair of punches A having a semi-cylindrical steel tube pressing surface and a punch B having a downward semi-cylindrical steel tube pressing surface.
- the radius of curvature of the pressing surface of the pair of punches A is as follows: At least larger than R1 and R2.
- Figure 4 shows a U-shaped rocker assembly system using a conventional punch device. 1 shows a schematic view of a press.
- a pair of rocker dies 50, 50 are used to process the U pipe 45, and the pair of rocker dies 50, 50 are respectively formed with rocker shoes 51, 52, Also, it has a rotation center 53 that is immovable during processing.
- the side surfaces of the U-tube 45 are formed by the pair of rocker dies 50, 50 and the press surfaces provided on the pair of punches A. Since the shape of the U-tube 45 is determined, it was difficult to sufficiently deform the side of the U-tube 45.
- the U-pipe 45 processed by using the conventional punch device is a high-strength material, the amount of springback after the U-press is likely to increase if the U-press is not sufficiently deformed. If the amount of springback increases, it becomes difficult to transport the U-tube after the U-processing into the O-press device, and the productivity of the steel tube decreases.
- FIG. 5 is a schematic view of a U-press using a rocker assembly system using the punch device 100 of the present invention.
- the steel sheet that has gone through the C-Kaney process is deformed by the punch device 100 and the rocker dies 50, 50 so that the cross-sectional shape becomes U-shaped.
- the punch device 100 of the present invention includes three punch portions 10, 20, and 30, while the rocker dies 50, 50 respectively have rocker shows 51, 52, and a rotation center 53 that is stationary during processing. It has.
- the side of the U-tube 5 has a pair of press surfaces 11, 11, and 21, 21, which are provided on the punch portions 10 and 20, and is arranged side by side. 52 ⁇ It is deformed.
- the radii of curvature R1 and R2 of the press surfaces provided in the punch portions 10 and 20 are determined by the punch (hereinafter referred to as “punch 8”) which has contributed to the deformation of the U tube side portion in the conventional punch device. ) Is smaller than the radius of curvature of the pressed surface.
- a pair of pressing surfaces 11 and 11 provided in the Bending can be applied to a portion closer to the end of the U-tube as compared with the punch device.
- the side portion of the U-tube 5 can be effectively deformed, so that the spring-back amount of the U-tube can be suppressed as compared with the conventional case. And the width of the U-tube can be reduced.
- the punch device 100 of the present invention since the punch device 100 of the present invention includes the punch portions 10 and 20 having the press surfaces having a smaller radius of curvature than the press surface of the punch A, the punch device 100 has different sizes and materials such as wall thickness. Even in the case of manufacturing, it is only necessary to increase or reduce the distance between the press surfaces in the punch portions 10 and 20, and it is not necessary to replace the punch A with one having a small radius of curvature. Therefore, if the U-press is performed by the U-press apparatus 100 of the present invention, the U-tube width can be more easily reduced than before. In addition, as described above, by performing the U-tube processing using the punch device 100 of the present invention, the U-tube width can be reduced as compared with the conventional case. The steel pipe can be easily transported inside, and the productivity of steel pipes can be improved.
- the punching device 100 for U-press of the present invention may be an integrated punching device provided with punching parts 10, 20, and 30, but for example, is constituted by different parts for each punching part.
- a punch device including a plurality of members may be used.
- FIG. 6 shows a schematic view of a U machining process by the rocker assembly method using the punch device 100 of the present invention.
- the steel sheet whose steel sheet end has been processed in the C processing step is conveyed between a pair of rocker dies 50, 50 and the punch device 100, and the rocker dies 51, 51, and the third punch section 30 of the rocker die. (Fig. 6 (a)).
- the steel sheet is gradually processed into a U-shape by moving the punch device 100 from top to bottom (gravity direction) (FIG. 6 (b)).
- the rocker dies 50, 50 rotate around the rotation centers 53, 53 when the steel plate comes into contact with the rocker shroud 52, and the U processing of the steel plate proceeds. .
- the processed U-shaped steel sheet is further added to the rocker dies 51, 51 and 52, 52 of the rocker die and the punch portion of the punch device 100. It is sandwiched by 10, 20, and 30, and is finally processed into a U-tube with a shape that can be transported into the O-press device in the O-processing step (Fig. 6 (c)).
- FIG. 7 is a schematic view showing a second embodiment of the present invention, which is applied to the U-press punch device.
- the punch device 200 of the present invention includes a first punch section 10, a second punch section 20, and a third punch section 30.
- the first punch portion 10 and the second punch portion 20 arranged below and in contact with the punch portion 10 are semi-cylindrical press surfaces 11 having a radius of curvature R1 provided on both side surfaces thereof. , 11, and the distance between the semi-cylindrical press surfaces 21, 21 having a radius of curvature R2 can be enlarged or reduced.
- the third punch portion 30 disposed below and in contact with the second punch portion 20 has a downward semi-cylindrical press surface 31 having a curvature radius force of 3.
- the direction perpendicular to the paper of FIG. 7 is referred to as the “tube axis direction” of the U-tube pressed by the punching apparatus, and the direction of FIG.
- the left-right direction on the paper is described as the “left-right direction” of the U-tube.
- the punch device 200 of the present invention is provided with a first screw 15 and a second screw 25 as punch moving means at ends of the first punch portion 10 and the second punch portion 20 in the tube axis direction. .
- the distance between the press surfaces 11, 11, and 21, 21 in the first punch portion 10 and the second punch portion 20 is increased by rotating the first screw 15 and the second screw 25.
- Z can be reduced.
- the screws 15 and 25 are rotated clockwise to increase the distance between the pair of press surfaces 11, 11 and 21, 21.
- the distance between the pair of press surfaces 11, 11, and 21, 21 is reduced by rotating the screws 15 and 25 counterclockwise.
- Each pressing surface can be moved in the direction in which the pressing is performed.
- the form of the punch device 200 of the present invention is not limited to the form in which the distance between the press surfaces of the first punch part 10 and the second punch part 20 can be enlarged and reduced as described above.
- the distance between the press surfaces in only one of the 10 It can be in a small form.
- the punch device of the present invention is configured as described above, it is possible to obtain a punch device 200 in which two or less punch portions can expand and reduce the distance between the press surfaces.
- the punch device 200 includes the three punch portions 10, 20, and 30, the amount of springback after the U-press is reduced as in the punch device 100 according to the first embodiment of the present invention. It can also be done. Therefore, according to the present invention, in the UOE steel pipe manufacturing process, it is possible to cope with various pipe sizes and reduce the U pipe width after the U press compared to the conventional U punch device.
- a punching device 200 for U-press can be provided.
- the relationship between the direction of rotation of the screw and the direction of movement of the press surface is not limited to the above-described embodiment.
- the punch moving means provided in the punching device for U-press of the present invention is not limited to a screw, and can be suitably used as long as it is a means capable of effectively moving each punch, not limited to a screw.
- the punching device 200 for U-press of the present invention may be an integrated punching device including the punch portions 10, 20, and 30.
- the bonding device may be a member device having a high strength.
- test steel pipe 1 UOE steel pipe with an outer diameter of 609.6 mm and a thickness of 14 mm
- test steel pipe 2 UOE steel pipe with an outer diameter of 711.2 mm and a thickness of 14 mm
- the test was performed under the following conditions. In the following tests, the U-press method of the rocker assembly method was used, and the number of U-press times was one. The yield stress of the test steel pipes 1 and 2 was 750 MPa.
- FIG. 8 shows a schematic view of a U-press punch device to which the present invention is applied.
- a punch device that works under this condition is designed to form a pair of semi-cylindrical press surfaces with a radius of curvature R1.
- a first screw 15 and a second screw 25 are provided.
- XI and X2 indicate the amount of movement (slide amount) of the press surface in the first punch portion 10 and the second punch portion 20 in the horizontal direction.
- Table 1 shows the values of the radii of curvature Rl, R2, and R3 of each punch in the punch device used in the present embodiment, the sliding amount XI of the first punch portion 10, and the sliding amount of the second punch portion 20. The value of the quantity X2 is also shown.
- XI and X2 are positive values means that each punch has been moved in the direction in which the space between the pair of press surfaces in each punch expands (hereinafter referred to as “enlargement direction”).
- the fact that these values are negative values means that each punch portion has been moved in a direction opposite to the above-described direction (hereinafter, referred to as a “reduction direction”).
- the U-press of two test steel pipes was performed using one punch device, so the radius of curvature of the press surface at each punch section provided in the punch device was the same in test steel tubes 1 and 2.
- Test steel pipe 1 Test steel pipe 2
- rl and r2 represent the radii of curvature of the press surfaces of the punches A and B shown in FIG. 3, respectively.
- the punch device according to the condition 1 (hereinafter, referred to as “Example”) includes the first punch portion 10 and the second punch portion 20 having a pair of movable press surfaces.
- the pair of press surfaces in each punch part are moved in the reduction direction, and when pressing the test steel pipe 2, the pair of press faces in each punch part are moved in the enlargement direction.
- the punch device of the present invention according to the embodiment was able to cope with a plurality of pipe sizes. Further, in the punch device of the present embodiment, it was necessary to replace the punch portion even if the pipe production size was different. For this reason, in the present embodiment, the time for punch replacement at the time of changing the steel pipe size, which was required in the conventional punch device, could be shortened.
- the punch device used in condition 2 (hereinafter, referred to as “comparative example”) has a force that cannot be applied to two steel tubes (test steel tubes 1 and 2) with one punch device. Therefore, the punch used was changed for each steel pipe. Therefore, time for punch exchange is required.
- Table 3 shows the U tube widths after the U press according to the examples and comparative examples. Table 3 shows the normalized values obtained by dividing the width of the U tube by the width of the O press device (O press die diameter).
- the U-tube after the U-press which is used in the present example using the punching device of the present invention, has a width smaller than the O-press die diameter in both the test steel tubes 1 and 2.
- the value was less than 1. Therefore, the U pipe after the U press using the punch device of the present invention could be directly conveyed into the O press device after the U press, even if the U pipe width was smaller than the O press die diameter.
- the U-press in the comparative example it was difficult to prevent spring back of the U-tube, so the value in Table 3 exceeded 1, and the U-tube width after the U-press became larger than the O-press die diameter. Was. Therefore, in this comparative example, it was impossible to directly transfer the U-tube into the O-press device after the U-press in both of the test steel tubes 1 and 2.
- the punch device of the present invention can handle steel pipes having different sizes and can reduce the width of the U pipe, and has three types of punches having different shapes, and a punch moving means.
- the effectiveness of the U-press punching device of the present invention comprising
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05730463A EP1792669B1 (en) | 2004-04-21 | 2005-04-14 | Punch device for u-press in uoe steel tube manufacturing process |
AT05730463T ATE510637T1 (en) | 2004-04-21 | 2005-04-14 | PUNCHING DEVICE FOR U-PRESS IN A PROCESS FOR PRODUCING UOE STEEL PIPES |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004125470A JP4479327B2 (en) | 2004-04-21 | 2004-04-21 | Punch device for U press in UOE steel pipe manufacturing process |
JP2004-125470 | 2004-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005102549A1 true WO2005102549A1 (en) | 2005-11-03 |
Family
ID=35196788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/007219 WO2005102549A1 (en) | 2004-04-21 | 2005-04-14 | Punch device for u-press in uoe steel tube manufacturing process |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1792669B1 (en) |
JP (1) | JP4479327B2 (en) |
CN (1) | CN100415401C (en) |
AT (1) | ATE510637T1 (en) |
WO (1) | WO2005102549A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101461748B1 (en) | 2012-12-24 | 2014-11-13 | 주식회사 포스코 | Pipe making method and c crimping device |
KR101382788B1 (en) | 2012-12-27 | 2014-04-17 | 주식회사 포스코 | Pipe making method and c crimping device |
EP3225321B1 (en) * | 2014-11-25 | 2023-08-30 | JFE Steel Corporation | A method of producing a steel pipe |
ES2717521T3 (en) | 2015-11-03 | 2019-06-21 | Ssab Technology Ab | Bend method |
JP6729011B2 (en) * | 2016-06-06 | 2020-07-22 | 日本製鉄株式会社 | Method for manufacturing closed-section structural member and upper mold for O molding |
AT520930B1 (en) * | 2018-06-29 | 2019-09-15 | Voestalpine Prec Strip Gmbh | Method for producing a steel strip knife and steel strip knife for tools |
JP7341424B2 (en) * | 2019-10-03 | 2023-09-11 | 株式会社キーレックス | Metal tube forming equipment |
JP7226367B2 (en) * | 2020-02-12 | 2023-02-21 | トヨタ自動車株式会社 | Pipe manufacturing method |
CN112355101B (en) * | 2021-01-12 | 2021-03-26 | 滨州医学院烟台附属医院 | Bending device for medical support |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5570420A (en) * | 1978-11-22 | 1980-05-27 | Nippon Steel Corp | Forming method for thick walled uo steel pipe |
JP2002086213A (en) * | 2000-09-13 | 2002-03-26 | Nkk Corp | Method and device for forming welded steel pipe |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2468708Y (en) * | 2001-02-26 | 2002-01-02 | 王及元 | Press for forming U shaped articles |
-
2004
- 2004-04-21 JP JP2004125470A patent/JP4479327B2/en not_active Expired - Fee Related
-
2005
- 2005-04-14 CN CNB2005800117669A patent/CN100415401C/en not_active Expired - Fee Related
- 2005-04-14 WO PCT/JP2005/007219 patent/WO2005102549A1/en not_active Application Discontinuation
- 2005-04-14 AT AT05730463T patent/ATE510637T1/en not_active IP Right Cessation
- 2005-04-14 EP EP05730463A patent/EP1792669B1/en not_active Not-in-force
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5570420A (en) * | 1978-11-22 | 1980-05-27 | Nippon Steel Corp | Forming method for thick walled uo steel pipe |
JP2002086213A (en) * | 2000-09-13 | 2002-03-26 | Nkk Corp | Method and device for forming welded steel pipe |
Also Published As
Publication number | Publication date |
---|---|
CN100415401C (en) | 2008-09-03 |
ATE510637T1 (en) | 2011-06-15 |
EP1792669A4 (en) | 2007-11-28 |
EP1792669B1 (en) | 2011-05-25 |
JP4479327B2 (en) | 2010-06-09 |
EP1792669A1 (en) | 2007-06-06 |
JP2005305501A (en) | 2005-11-04 |
CN1942261A (en) | 2007-04-04 |
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