WO2014192091A1 - Procédé de fabrication de tuyau en acier soudé - Google Patents

Procédé de fabrication de tuyau en acier soudé Download PDF

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Publication number
WO2014192091A1
WO2014192091A1 PCT/JP2013/064852 JP2013064852W WO2014192091A1 WO 2014192091 A1 WO2014192091 A1 WO 2014192091A1 JP 2013064852 W JP2013064852 W JP 2013064852W WO 2014192091 A1 WO2014192091 A1 WO 2014192091A1
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WO
WIPO (PCT)
Prior art keywords
steel plate
center
die
press forming
molding
Prior art date
Application number
PCT/JP2013/064852
Other languages
English (en)
Japanese (ja)
Inventor
正之 堀江
征哉 田村
俊博 三輪
宏司 堀際
Original Assignee
Ｊｆｅスチール株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to PCT/JP2013/064852 priority Critical patent/WO2014192091A1/fr
Priority to JP2015519536A priority patent/JP6070967B2/ja
Priority to RU2015155550A priority patent/RU2621747C1/ru
Priority to CN201380076724.8A priority patent/CN105246608B/zh
Priority to EP13885748.7A priority patent/EP3006128B1/fr
Publication of WO2014192091A1 publication Critical patent/WO2014192091A1/fr

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    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a method for manufacturing a large-diameter and thick-walled welded steel pipe used for a line pipe or the like, and more specifically, an open with high roundness by a press bend method in which a plurality of three-point bending press forming is performed. It relates to a method of manufacturing a tube.
  • the above-mentioned open pipe is a state in which the plate ends (open seam edges) facing each other are not welded after the plate material is formed into a cylindrical shape. Refers to the molded product.
  • a steel plate with a predetermined width, length and thickness is press-formed into a U shape and then pressed into an O shape to form an open pipe.
  • UOE steel pipe in which the open pipe is butt welded to form a steel pipe and the diameter thereof is further expanded (expanded) to increase the roundness, is widely used.
  • a great deal of pressure is required, and thus it is necessary to use a large-scale press.
  • Patent Document 1 discloses a punch that constitutes an upper mold, a cradle that is fixed at the position opposite to the punch, and that serves as a bottom dead center of the punch.
  • First and second dies that are arranged opposite to the right and left sides of the cradle and are capable of reciprocating in opposite directions are provided, and the lower die is configured by the cradle, the first die, and the second die.
  • a press mold is disclosed.
  • Patent Document 2 an outer mold in which a concave molding surface having a radius corresponding to the outer diameter is formed to a predetermined length and an inner mold in which a convex molding surface having a radius corresponding to the inner diameter is formed to a predetermined length are brought close to each other.
  • the inner mold with the roller body installed on both sides of the outer mold and receiving the steel plate at a position protruding inward from the extended surface of the outer mold
  • a technique has been disclosed in which the bending is made accurate by bringing the shape close to the outer mold and bending the portion corresponding to the press.
  • Patent Document 3 a steel plate is press-formed, bent, and welded and joined in a state where the groove portions are substantially in contact with each other to form a semi-formed round steel tube, and the entire semi-formed round steel tube is heated.
  • a method for manufacturing a round steel pipe is disclosed in which the forming surface is hot-formed by passing between a plurality of semi-circular forming rolls corresponding to the final radius, and the shape is adjusted.
  • Patent Document 3 requires a heating process in which the shape correction is performed hot, which causes a significant increase in manufacturing cost.
  • strength, toughness, and weldability may be impaired by heating.
  • the present invention has been made in view of the above-described problems of the prior art, and its purpose is to produce a welded steel pipe that can easily produce an open pipe with a small amount of misalignment of the welded portion by the press bend method. To propose a method.
  • the inventors conducted a detailed investigation focusing on changes in the shape of the steel sheet in three-point bending press forming in order to reduce the occurrence of misunderstandings in the welded portion as much as possible. As a result, after multiple press forming (first half press forming) from one width end of the steel sheet toward the width center, multiple press forming (second half press forming) from the opposite end to the width center.
  • a material steel plate is three-point bending press-formed with a pair of dies arranged at a predetermined interval in the steel plate feeding direction and a punch for pressing the steel plate between the pair of dies.
  • a method for producing a welded steel pipe characterized in that a steel plate supported by a die on the center side of the steel plate width is an unformed part.
  • the final pass of the latter half press forming is the following formula (1): ⁇ b ⁇ W ⁇ b ⁇ L b + L n (1)
  • L b Molding range in the final pass of the second half press molding (mm)
  • L n Molding range in final press molding (mm)
  • W Die spacing (mm)
  • ⁇ b Steel sheet position shift rate in the final pass of the second half press forming ( ⁇ )
  • ⁇ b Die position shift rate in the final pass of the second half press forming ( ⁇ ) It is characterized by satisfying.
  • the present invention there is no adverse effect on quality such as a reduction in the thickness of the steel sheet due to the narrow pressure between the lower mold and the upper mold, and the work efficiency is not reduced by replacing the lower mold. There is no need to change the molding conditions in the press molding, and an open tube having no level difference (mismatch) at the butt portion can be obtained.
  • hot shape correction since hot shape correction is not required, it is possible to provide a steel pipe that maintains the characteristics built in the manufacturing stage of the material steel plate.
  • FIG. 1 shows a press using a three-point bending press forming machine having a pair of dies arranged at predetermined intervals in the steel sheet feeding direction and supporting the steel sheet at two locations and a punch for pressing the steel sheet between the dies.
  • molds the open pipe before welding of a welded steel pipe by the bend method is shown typically.
  • FIG. 1 although the steel plate which provided the end bending is used, it is the same also when the end bending is not provided.
  • the three-point bending press forming and the feeding of the steel sheet are repeated a plurality of times (a times) to form the half of the steel sheet into a substantially circular shape.
  • the first half press forming is completed without forming the steel plate center portion C.
  • this process is referred to as “first half press molding”.
  • the three-point bending press forming and feeding are repeated a plurality of times (b times) from the other end of the steel plate, from the B part to the C part, and the remaining half is formed into a substantially circular shape.
  • the forming conditions such as the feed amount of the steel sheet and the number of presses (pass times) are the same as the first half press forming so that the shape of the forming part is the same as the first half press forming. .
  • the steel plate center portion C is not formed. This process is called “second half press molding”.
  • the steel plate after the latter half press forming has a C-shaped shape in which a flat portion remains at the center of the width and the butt portion is greatly opened.
  • the amount of reduction (positional relationship between the die and punch) in the first half press molding and the second half press molding can be arbitrarily selected for each press molding pass to control the molding shape, but the first half press molding and the second half press molding. In order to make the molding shapes of the same the same, it is preferable to make them constant. However, if it is known that the end bending shape, plate thickness, strength, etc. are different between the first half press forming side and the second half press forming side, or if an asymmetric shape is desired in consideration of the subsequent processes, The feed amount, the number of presses, the reduction amount, etc. may be changed between the first half press molding and the second half press molding. In that case, it is preferable to adjust the amount of reduction that can be easily changed on the spot.
  • the feed amount of the steel plate for each pass of the steel plate is not more than the die interval. This is because, when the feed amount exceeds the die interval, an undeformed portion remains in the formed steel sheet, resulting in a result that the roundness of the open pipe and thus the product steel pipe is extremely inferior.
  • FIG. 2 is a schematic diagram for explaining the final pass (a-th) of the first half press molding.
  • the left die in the figure is in contact with the steel plate that has not yet been formed, but the other right die has a steel plate portion with a curvature that has already been formed. Will float from the die. Therefore, when the steel plate is pressed with a punch, the pre-formed side having a curvature is lowered, and press forming starts from a state where the steel plate is inclined.
  • FIG. 3 and FIG. 4 are schematic diagrams for explaining the final pass (b-th) of the latter half press forming.
  • the forming shape changes greatly depending on the relative relationship between the die interval and the feed amount of the steel plate.
  • the right die in the drawing is in contact with the unformed portion on the center side in the width direction of the steel plate.
  • the other left-side die has a steel plate portion having a curvature that has already been formed, so that the steel plate floats from the die. That is, it is the same state as FIG.
  • the shape of the right steel plate is different from the shape of the left steel plate in FIG. 3, and thus, for example, a device (guide or the like) for feeding the steel plate disposed on the machine side of the press machine
  • a device for example, a device for feeding the steel plate disposed on the machine side of the press machine
  • FIG. 5 schematically shows the situation when the steel plate is fed for the final pass of the second half press forming when the feed amount of the same steel plate as in FIG. 4 is relatively small with respect to the die interval.
  • the steel plate In order to send the steel plate to the final pass position, the steel plate is sent toward the steel plate width end side (left side of the figure), but before reaching the final pass position, the center of gravity of the steel plate is the center of the width of the steel plate. Since it exceeds the right side die in the figure on the side, the left side of the steel plate width side is lowered and comes into contact with the left side die.
  • the position at which the left end of the steel plate starts to fall and the position in contact with the die also vary depending on the inertial force when feeding the steel plate and the frictional resistance with the die due to the difference in the surface state of the steel plate, so press forming It also causes variation in range.
  • FIG. 6 shows the positional relationship between the steel plate, the die and the punch when the steel plate is placed in a state before the final pass (b-th) of the second half press forming.
  • L b , L n , W, ⁇ b and ⁇ b shown in the figure are defined as follows.
  • L b Molding range (mm) in the final pass of the second half press molding
  • L n Molding range in final press molding (mm)
  • W Die spacing (mm)
  • ⁇ b Steel sheet position shift rate in the final pass of the second half press forming ( ⁇ )
  • ⁇ b Die position shift rate in the final pass of the second half press forming ( ⁇ )
  • 0 ⁇ ⁇ ⁇ 1, 0 ⁇ ⁇ ⁇ 1, and when ⁇ is 0.5 the center of L b coincides with the center of the punch, and when ⁇ is smaller than 0.5, L b
  • the center is shifted to the left side from the center of the punch, and when ⁇ is 0.5, the center between the dies and the center of the punch coincide, and when ⁇ is smaller than 0.5, the center of the die is It will shift to the left from the center of the punch.
  • the steel sheet feed amount to the final forming (n-th) after the final pass (b-th) of the second half press forming is ⁇ b
  • the steel plate portion formed by the first half press forming comes into contact with the right die in the drawing, that is, the same state as FIG. ⁇ b ⁇ W ⁇ b ⁇ L b + L n (1) This is when the condition is satisfied.
  • the influence of the die interval W on the force required for the three-point bending press forming will be examined with reference to FIG.
  • the material to be formed (steel plate) is deformed by yielding at the end of the forming range. Therefore, a bending moment necessary for plastic deformation of the material to be formed is present at the end of the forming range.
  • the bending moment required for plastic deformation is a value Mf determined by the thickness of the molding material and the deformation resistance, while the force acting on the molding material from the die is the reaction force P 1 and P received from the die. 4 , and a moment obtained by multiplying this by the distance (L 1 and L 4 ) to the deformation point (end of the forming range) acts.
  • the main welded steel pipe is preferably expanded using a pipe expanding device.
  • the pipe expansion ratio is preferably in the range of 0.5 to 1.2%.
  • the end-bending thick steel plate was subjected to three-point bending press forming with a three-point bending press machine having a force of 100MN and variously changing the steel plate feed amount and the die interval, and the outer diameter was 914.4 mm, the length was 12192 mm, The tube was formed into an open tube having a thickness of 31.8 mm, and the amount of misalignment at the butt portion defined in FIG. 8 was measured.
  • the punch outer peripheral surface of the three-point bending press molding was R315 mm, and the die outer peripheral surface was R100 mm.
  • Table 1 shows the measurement result of the misalignment amount of the butt portion together with the pressing conditions.
  • the pressing conditions the number of passes in the second half of the press molding, bending angle theta b per one pass, forming range L b at the final pass of the second half of the press molding, the range L n in the final press-molding, the final late press molding
  • the punch shift rate ⁇ b , die shift rate ⁇ b, and die interval W in the pass are shown.
  • the bending angle, forming range, punch shift rate and die shift rate per pass are the same as the final pass of the second half press forming, and the first half press forming is the same number of presses as the second half press forming.
  • the misalignment amount of the butt portion is 5 mm or less, which is the correctable range, in any condition, but exceeds the correctable range if the condition of the expression (1) is not satisfied. It can be seen that there is a mistaking amount.
  • Example 2 In the same manner as in Example 1, a thick steel plate having an API X80 Grade strength, an outer diameter of 914.4 mm, a length of 12192 mm, and a plate thickness of 31.8 mm was subjected to three-point bending press forming into an open pipe for a welded steel pipe. At this time, the number of passes of the second half press molding was changed to 9 and 5 times, and the die interval was changed to 360 mm, 380 mm, 620 mm and 640 mm, and the shift amounts ⁇ b and ⁇ b of the final pass in the second half press molding were further changed under the above conditions. Various changes were made.
  • Open pipes for welded steel pipes having various strengths and dimensions were produced in the same manner as in Examples 1 to 3.
  • Table 4 shows the strength grade and dimensions of the product, the radius of the tool used as the end bending condition, the working width (end bending range), the bending angle, and the pressing condition.
  • the punch shifting rate and die shifting rate were set to 0.5.
  • the bending angle per one pass, the molding range, the punch shift rate and the die shift rate are the same as the final pass of the second half press molding.
  • the same press times and conditions were used.
  • the difference in the welded portion of each oven tube thus obtained was measured and evaluated in the same manner as in Example 1, and the results are also shown in Table 4.

Abstract

L'invention concerne un procédé pour la fabrication d'un tuyau en acier soudé à l'aide d'un procédé de cintrage et qui produit un tuyau en acier en amenant une plaque d'acier de matériau de départ à être moulée par pressage en flexion trois points en un tuyau ouvert à l'aide d'une paire de matrices, qui sont disposés à une distance prédéterminée dans la direction de transfert de la plaque d'acier, et d'un poinçon, qui presse la plaque d'acier entre la paire de matrices, et en soudant ensuite le tuyau ouvert, après réalisation d'une pluralité de répétitions d'une première moitié de moulage par pressage à partir d'une extrémité dans la direction de la largeur de la plaque d'acier vers le centre dans de la largeur (mais à l'exception du centre dans la direction de la largeur), réalisation d'une pluralité de répétitions d'une seconde moitié de moulage par pressage à partir de l'autre extrémité dans le sens de la largeur vers le centre dans la direction de la largeur (mais à l'exception du centre dans la direction de la largeur), et lors finalement de la réalisation d'un moulage par pressage final au centre dans la direction de la largeur pour aboutir à un tuyau ouvert, amener la partie de la plaque d'acier soutenu au niveau des matrices au côté central dans la direction de la largeur de la plaque d'acier à la passe finale du second demi-moulage par pressage pour être une partie non moulée, ce qui produit ainsi un tube ouvert ayant une faible quantité d'irrégularité dans la partie soudée.
PCT/JP2013/064852 2013-05-29 2013-05-29 Procédé de fabrication de tuyau en acier soudé WO2014192091A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/JP2013/064852 WO2014192091A1 (fr) 2013-05-29 2013-05-29 Procédé de fabrication de tuyau en acier soudé
JP2015519536A JP6070967B2 (ja) 2013-05-29 2013-05-29 溶接鋼管の製造方法
RU2015155550A RU2621747C1 (ru) 2013-05-29 2013-05-29 Способ получения сварной стальной трубы
CN201380076724.8A CN105246608B (zh) 2013-05-29 2013-05-29 焊接钢管的制造方法
EP13885748.7A EP3006128B1 (fr) 2013-05-29 2013-05-29 Procédé de fabrication de tuyau en acier soudé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2013/064852 WO2014192091A1 (fr) 2013-05-29 2013-05-29 Procédé de fabrication de tuyau en acier soudé

Publications (1)

Publication Number Publication Date
WO2014192091A1 true WO2014192091A1 (fr) 2014-12-04

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Application Number Title Priority Date Filing Date
PCT/JP2013/064852 WO2014192091A1 (fr) 2013-05-29 2013-05-29 Procédé de fabrication de tuyau en acier soudé

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EP (1) EP3006128B1 (fr)
JP (1) JP6070967B2 (fr)
CN (1) CN105246608B (fr)
RU (1) RU2621747C1 (fr)
WO (1) WO2014192091A1 (fr)

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DE102015210259A1 (de) * 2015-06-03 2016-12-08 Sms Group Gmbh Verfahren zum Herstellen von Schlitzrohren aus Blechtafeln

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JP6709638B2 (ja) * 2016-03-10 2020-06-17 日立造船株式会社 鋼管構造体における鋼管と継手との溶接方法
CN111954580B (zh) * 2018-03-30 2022-05-10 杰富意钢铁株式会社 钢板的端部弯曲方法及装置以及钢管的制造方法及设备
JP6791397B2 (ja) * 2018-09-14 2020-11-25 Ｊｆｅスチール株式会社 鋼管の製造方法及びプレス金型
CN109500118B (zh) * 2018-12-26 2023-06-09 重庆龙煜精密铜管有限公司 一种防跳车游动芯头及铜管缩径拉拔防跳车方法
CN112024723A (zh) * 2020-08-21 2020-12-04 江苏恒高电气制造有限公司 一种gil小角度壳体弯曲装置
CN112659563A (zh) * 2020-11-27 2021-04-16 常州安一智能科技有限公司 圆桶滤网热压拼接设备及其工作方法
DE102020215088A1 (de) * 2020-12-01 2022-06-02 Sms Group Gmbh Verfahren zur Herstellung von Schlitzrohren
CN114570784B (zh) * 2021-12-24 2022-12-06 钢一控股集团有限公司 一种大口径不锈钢管的成型装置

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DE102015210259B4 (de) * 2015-06-03 2016-12-15 Sms Group Gmbh Verfahren zum Herstellen von Schlitzrohren aus Blechtafeln
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EP3006128B1 (fr) 2018-10-24
JP6070967B2 (ja) 2017-02-01
CN105246608A (zh) 2016-01-13
CN105246608B (zh) 2018-01-02
RU2621747C1 (ru) 2017-06-07
EP3006128A4 (fr) 2016-06-29
EP3006128A1 (fr) 2016-04-13
JPWO2014192091A1 (ja) 2017-02-23

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