EP1857195A1 - Procédé de traitement de cintrage pour matériau de métal, appareil de traitement de cintrage, ligne d équipement de traitement de cintrage et produit cintré obtenu ainsi - Google Patents

Procédé de traitement de cintrage pour matériau de métal, appareil de traitement de cintrage, ligne d équipement de traitement de cintrage et produit cintré obtenu ainsi Download PDF

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Publication number
EP1857195A1
EP1857195A1 EP06714360A EP06714360A EP1857195A1 EP 1857195 A1 EP1857195 A1 EP 1857195A1 EP 06714360 A EP06714360 A EP 06714360A EP 06714360 A EP06714360 A EP 06714360A EP 1857195 A1 EP1857195 A1 EP 1857195A1
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EP
European Patent Office
Prior art keywords
metal material
bending
movable roller
roller die
unit
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.)
Granted
Application number
EP06714360A
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German (de)
English (en)
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EP1857195B8 (fr
EP1857195B1 (fr
EP1857195A4 (fr
Inventor
Atsushi Tomizawa
Fumihiko Kikuchi
Shinjiro Kuwayama
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
Nippon Steel Pipe Co Ltd
Original Assignee
Sumitomo Metal Industries Ltd
Sumitomo Pipe and Tube Co Ltd
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 Sumitomo Metal Industries Ltd, Sumitomo Pipe and Tube Co Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to EP12174983A priority Critical patent/EP2511020A3/fr
Publication of EP1857195A1 publication Critical patent/EP1857195A1/fr
Publication of EP1857195A4 publication Critical patent/EP1857195A4/fr
Application granted granted Critical
Publication of EP1857195B1 publication Critical patent/EP1857195B1/fr
Publication of EP1857195B8 publication Critical patent/EP1857195B8/fr
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Anticipated expiration legal-status Critical

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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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12292—Workpiece with longitudinal passageway or stopweld material [e.g., for tubular stock, etc.]

Definitions

  • the present invention relates to a method for bending a metal material, a bending machine, and a bending-equipment line, and more particularly, to a method for effectively bending a metal material through a two-dimensional continuous bending operation in which the metal material is two-dimensionally bent in different directions (for example ending in a S shape) or a three-dimensional continuous bending operation in which the metal material is three-dimensionally bent in different directions, to a bending machine and a bending-equipment line to which the bending method can be applied, and to a bent product made by the bending machine or the bending-equipment line.
  • a steel sheet having a much higher tensile strength than that in the related art for example, a material having high strength with a tensile strength of 780 MPa or more, preferably, 900 MPa or more, has come into widespread use.
  • Japanese Patent Application Publication No. 50-59263 and Japanese Patent No. 2816000 disclose a method for bending a metal tube or the like while performing a thermal treatment on the metal tube or the like. Specifically, the following methods are disclosed: a bending method for clamping a leading end of a metal tube or the like with a rotatable arm, heating the metal tube or the like by using a heating unit, appropriately moving the heated portion of the metal tube or the like to bend the heated portion, and cooling down the bent portion ( Japanese Patent Application Publication No. 50-59263 ); and a method for applying torsion and bending force to the heated portion of the metal tube or the like to bend the metal tube or the like while twisting the metal tube or the like ( Japanese Patent No. 2816000 ).
  • the disclosed bending methods are so-called grab bending methods requiring a rotatable arm for clamping the leading end of a metal tube or the like, which makes it difficult to feed the metal tube or the like to be bent at high speed.
  • the arm needs to make a return movement in order to repeatedly clamp the metal tube or the like, resulting in a remarkable variation in the feeding speed of the metal tube or the like. Therefore, a complicated control is required for a heating or cooling speed, which makes it difficult to ensure predetermined quenching accuracy.
  • Japanese Patent Application Publication No. 2000-158048 discloses a high-frequency heating bender based on push bending that supports a push bending roller so as to be movable in a three-dimensional direction.
  • the push bending roller is moved over a workpiece to be bent to reach the opposite side of the workpiece, and comes into contact with the opposite side of the workpiece, thereby bending the workpiece. Therefore, in a two-dimensional continuous bending operation in which a workpiece is two-dimensionally bent in different directions in, for example, an S shape, a process of turning the workpiece by 180 degrees is not needed.
  • Japanese Patent No. 3195083 discloses a push-through bending machine that includes a fixed die, a movable gyro die that is movable in a three-dimensional direction, and a heating unit that heats a metal member at a temperature corresponding to the curvature of the metal member bent by the movable gyro die, instead of the push bending roller of the high-frequency heating bender or the grab bending method.
  • Japanese Patent No. 3195083 since the movable gyro die, which is the fixed die, do not rotatably support a metal member to be bent, the metal material is likely to be adhered to the surfaces of the movable gyro die.
  • a cooling fluid is supplied to the movable gyro die to prevent the decrease of the strength of the dies and the lowering of bending accuracy due to thermal expansion.
  • Japanese Patent No. 3195083 does not disclose a method for performing a thermal treatment, such as quenching, on the bent metal member, and thus it is difficult to obtain a metal member having high strength.
  • the metal material have a tensile strength of 900 MPa or more, preferably, 1300 MPa or more, in order to reduce the weight of the metal material.
  • a metal tube having a tensile strength of about 500 to 700 MPa is bent as a starting material and a thermal treatment is performed on the bent metal tube to improve the strength of the metal tube, thereby obtaining a metal material having high strength.
  • the bending machine disclosed in Japanese Patent No. 3195083 is based on push-through bending, but does not disclose a technique for performing hot working on a metal tube having low strength as a starting material and then performing quenching on the heated metal tube to increase the strength of the metal tube so as to obtain a metal material having high strength.
  • the metal material is likely to have seizure defects on the surface of the movable gyro die due to heating. Therefore, the hot bending machine needs to be further improved.
  • the invention is designed to solve the above-mentioned problems, and it is an object of the present invention to provide a method for bending a metal material with a high degree of operation efficiency, while the method allowing a high degree of bending accuracy to be ensured even when a metal material is bent in various shapes and further even when a metal material having high strength is bent in association with diversification of structures of automobile parts, and a bending machine and a bending equipment line to which the bending method can be applied.
  • a method of successively or continuously feeding a metal material held by a supporting unit from an upstream side of the supporting unit and bending the metal material at a downstream side of the supporting unit includes: supporting the metal material with a movable roller die that is provided at the downstream side of the supporting unit; controlling the position of the movable roller die and/or the moving speed of the metal material; heating the metal material locally in a temperature range in which quenching can be performed, by using a heating unit that is provided around the outer circumference of the metal material at an entrance side of the movable roller die; applying a bending moment to the heated portion; and rapidly cooling down the metal material by using a cooling unit that is provided around the outer circumference of the metal material at the entrance side of the movable roller die.
  • the downstream side of the metal material is supported, and a thermal treatment is performed on the metal material while moving the metal material at a predetermined speed, which makes it possible to ensure a predetermined cooling speed.
  • the bent metal material is uniformly cooled down, it is possible to obtain a metal material having excellent shape fixability despite high strength, and uniform hardness.
  • a blank tube as a work piece is successively and continuously heated by a high-frequency heating coil at an A 3 transformation point or more and up to a temperature at which coarse grains are not generated, and the locally heated portion of the metal material is plastically deformed by the movable roller die. Then, a cooling medium having water or oil as the main ingredient or other coolants, gas, or mist is injected onto the outside surface or both the outside and inside surface of the in-process tube, thereby enabling to ensure a cooling speed of 100°C/sec or more.
  • the movable roller die functioned to apply a bending moment supports the metal material in a rolling manner to prevent seizure defects on the surface of the die, which makes it possible to effectively bend the metal material.
  • the supporting unit rotatably supports the metal material, it is possible to prevent seizure defects on the surface of the supporting unit.
  • the movable roller die includes at least one of a shift mechanism for moving the movable roller die in a vertical direction, a shift mechanism for moving the movable roller die in a horizontal direction, a tilt mechanism for inclining the movable roller die in the vertical direction, and a tilt mechanism for inclining the movable roller die in the horizontal direction.
  • the movable roller die further includes a moving mechanism for moving the movable roller die in a forward or backward direction. According to this structure, even when the bending radius of a metal material is small, it is possible to ensure an appropriate arm length L, which makes it possible to prevent an increase in scale of a bending machine and ensure a high degree of bending accuracy.
  • the heating unit and/or the cooling unit include at least one of a shift mechanism for moving the unit in the vertical direction, a shift mechanism for moving the unit in the horizontal direction, a tilt mechanism for inclining the unit in the vertical direction, and a tilt mechanism for inclining the unit in the horizontal direction.
  • the heating unit and/or the cooling unit further include a moving mechanism for moving the unit in a forward or backward direction.
  • a moving mechanism for moving the unit in a forward or backward direction it is possible to heat the leading end of a metal tube at the beginning of a bending operation, in addition to synchronization between the operation of the movable roller die and the operations of the heating and the cooling unit. Therefore, it is possible to improve workability and operability when mounting or dismounting a metal tube.
  • the movable roller die in the method for bending a metal material according to the above-mentioned aspect, preferably, the movable roller die includes a rotational mechanism for rotating the movable roller die in the circumferential direction. According to this structure, it is possible to twist the metal material, in addition to two-dimensionally or three-dimensionally bending the metal material in different directions.
  • a pushing apparatus provided at the upstream side of the metal material may include a mechanism that holds and rotates a workpiece in a circumferential direction. According to this structure, it is possible to twist the metal material, in addition to two-dimensionally or three-dimensionally bending the metal material in different directions, without using the rotational mechanism of the movable roller die.
  • the supporting unit includes a rotational mechanism for rotating the supporting unit in a circumferential direction, and rotates in the circumferential direction in synchronization with the rotation of the pushing apparatus.
  • the rotational mechanism of the feeding apparatus twists a rear end of the metal material, while synchronizing with the operation of the supporting unit, without rotating the movable roller die in the circumferential direction, which makes it possible to accurately twist the metal material.
  • the rotational mechanism of the feeding apparatus may twist the rear end of the metal material in synchronization with the operation of the supporting unit, while rotating the movable roller die in the circumferential direction. In this case, it is also possible to accurately twist the metal material.
  • the movable roller die includes a driving mechanism that drives rollers, such as a driving motor that drives and rotates the rollers according to the amount of the metal material extruded by the pushing apparatus. That is, when the movable roller die does not include the driving and rolling mechanism, the rollers are driven by only frictional resistance, and compressive stress is applied to the bent portion of the metal material. As a result, the inner radius side of the bent portion is thickened, resulting in buckling. In particular, when a thin metal material is used, the buckling makes it difficult to bend the thin metal material, or may otherwise cause the accuracy of bending to be lowered.
  • a driving mechanism that drives rollers, such as a driving motor that drives and rotates the rollers according to the amount of the metal material extruded by the pushing apparatus. That is, when the movable roller die does not include the driving and rolling mechanism, the rollers are driven by only frictional resistance, and compressive stress is applied to the bent portion of the metal material. As a result, the inner radius side of the
  • the driving and rolling mechanism provided in the movable roller die reduces the compressive stress applied to the bent portion.
  • the rotational speed of the rollers of the movable roller die is controlled so as to be synchronized with the feed amount of the metal material fed through by the feeding apparatus, it is possible to apply tensile stress to the bent portion and thus widen the available range for bending. As a result, it is possible to improve the bending accuracy of a metal material.
  • the movable roller die in the method for bending a metal material according to the above-mentioned aspect, preferably, may comprise two rollers, three rollers, or four rollers.
  • the metal material subjected to a bending operation is a closed cross-section member, an open cross-section member, an irregular cross-section member, or a rod member, wherein the cross-section thereof is formed in various shapes. According to this structure, it is possible to design the roll caliber of the movable roller die according to the cross-section of a metal material to be bent.
  • one or more preheating units are provided at the upstream side of the heating unit to perform two-stage heating or preferential heating on the metal material.
  • a preheating unit for plural-stage heating it is possible to disperse the heating load of a metal material, and thus enabling to improve bending efficiency.
  • the temperature of the heated portion of the metal material intended to be an inner radius side of the bend is controlled to be lower than that of the heated portion intended to be an outer radius side of the bend, taking into account the bending direction of the metal material determined by the movable roller die.
  • the heated portion of the metal material is configured in this way, it is possible to prevent wrinkles from being generated on the inner radius surface of the bent portion and cracks from being generated in the outer radius surface of the bent portion.
  • a mandrel serving as the cooling unit
  • a cooling medium is supplied by the mandrel alone and/or in combination with the cooling unit provided around the outer circumference of the metal material.
  • the cooling medium supplied from the cooling unit contains water as a primary component, and a rust-preventative agent.
  • the cooling water contains a rust-preventative agent in order to protect the bending machine.
  • the cooling medium supplied from the cooling unit includes water as a primary component, and a quenching agent.
  • a quenching agent mixed with an organic polymer agent has been known.
  • the quenching agent is mixed at a predetermined concentration, it is possible to appropriately control the cooling rate and thus ensure a stable quenching performance.
  • a lubricant and/or a cooling fluid are supplied to the movable roller die.
  • the lubricant can prevent the scales from causing seizure defects on the surface of the movable roller die.
  • the movable roller die is cooled by the cooling fluid. Therefore, it is possible to prevent the decrease of the strength of the movable roller die, the lowering of bending accuracy due to the thermal expansion of the movable roller die, and the seizure defects on the surface of the movable roller die.
  • a robot having one or more joints is provided, the joint being able to rotate on its axis respectively, and the articulated robot performs the operation of at least one of the shift mechanism, the tilt mechanism, and the moving mechanism of the movable roller die, and the heating unit and/or the cooling unit.
  • the articulated robot can perform a series of operations each of which is performed by a manipulator as a shift operation in the vertical or horizontal direction, as a tilt operation in the vertical or horizontal direction, and as a moving operation in the forward or backward direction which the movable roller die, the heating unit, and the cooling unit entail respectively, on the basis of control signals. Therefore, it is possible to improve the efficiency of a bending operation and reduce the size of a bending machine.
  • a bending machine in order to apply the method for bending the metal material, includes: a supporting unit that supports a metal material; an feeding apparatus that successively or continuously pushes out the metal material from an upstream side; a movable roller die that is provided at a downstream side of the supporting unit, supports the metal material, and controls the supporting position and/or the moving speed of the metal material; a heating unit that is provided around the outer circumference of the metal material at the entrance side of the movable roller die, and heats the metal material in a temperature range in which the heated portion of the metal material can be plastically deformed and in a temperature range in which quenching can be performed; and a cooling unit that is provided around the outer circumference of the metal material at the entrance side of the movable roller die, and rapidly cools down the metal material having a heated portion to which a bending moment is applied.
  • the metal material pushed out by the pushing apparatus is bent at the downstream side of the supporting unit.
  • a bending-equipment line in order to effectively manufacture an inexpensive bent product from a circular tube supplied as a workpiece, includes: an electric resistance welded steel tube manufacturing line that includes: an uncoiler that continuously unrolls into a strip-shaped steel sheet; a forming machine that forms the unrolled strip-shaped steel sheet into a steel tube having a predetermined shape in sectional view; a welding machine that welds both edges of the strip-shaped steel sheets opposite to each other to form continuous tube; and a post-processing machine that performs a weld bead cutting operation, and, if necessary, a post-annealing operation or a sizing operation; and the bending machine according to the above-mentioned aspect that is sequentially arranged at the exit side of the electric resistance welded steel tube manufacturing line.
  • a bending equipment line in order to effectively manufacture an inexpensive bent product from a closed cross-section material supplied as a workpiece, includes: a roll forming line that includes: an uncoiler that continuously unrolls into a strip-shaped steel sheet; and a forming machine that forms the unrolled strip-shaped steel sheet into having a predetermined shape in sectional view; and the bending machine according to the above-mentioned aspect that is sequentially arranged at the exit side of the roll forming line.
  • a bent product of the invention is characterized in that the product having a tensile strength of 900 MPa or more is made by the above bending method for a metal material or by virtue of a thermomechanical treatment subjected during using the bending machine as above.
  • the method for bending a metal material, the bending machine, and the bending equipment line in accordance with the above-described aspects of the present invention even when a metal material is bent in various shapes, such as in a two-dimensional continuous bending operation in which the metal material is two-dimensionally bent in different directions (for example, an S shape) or in a three-dimensional continuous bending operation in which the metal material is three-dimensionally bent in different directions, and even when a metal material having high strength is bent, the metal material is uniformly cooled down, whereby it is possible to effectively obtain a metal material having excellent shape fixability despite having high strength, and uniform hardness distribution at a low cost.
  • a two-dimensional continuous bending operation in which the metal material is two-dimensionally bent in different directions
  • a three-dimensional continuous bending operation in which the metal material is three-dimensionally bent in different directions
  • the movable roller die rotatably supports a metal material, it is possible to retard the generation of seizure defects on the surface of the movable roller die. Therefore, the accuracy of a bending operation can be ensured, and a push-through bending operation can be performed with a high degree of operation efficiency. In this way, the bending method according to the present invention can be widely applied as an art of accurately bending automobile parts.
  • Fig. 1 is a diagram illustrating the overall structure of a bending machine for performing a bending operation according to the present invention.
  • a metal material 1 as a workpiece that is rotatably supported by a supporting unit 2 is successively or continuously fed from an upstream side, and is then bent at a downstream side of the supporting unit 2.
  • the metal material 1 shown in Fig. 1 has a circular shape (circular tube) in a sectional view, but the present invention is not limited thereto.
  • Workpieces having various shapes in sectional view may be used.
  • the following materials may be used as the metal material 1: materials with a closed cross section that have various shapes in sectional view including the circular shape (circular tube) shown in Fig. 1, a rectangular shape, a trapezoidal shape, and other complicated shapes; materials (channels) with an open cross section that are manufactured by, for example, roll forming; materials (channels) with an irregular cross section that are manufactured by an extrusion process; and rod-shaped materials having various shapes in sectional view (a circular rod, a rectangular rod, and an irregular-shape rod).
  • Figs. 2A and 2B are diagrams illustrating the cross-sectional shapes of workpieces that can be used as the metal materials according to the present invention.
  • Fig. 2A shows a channel with an open cross section that is manufactured by, for example, roll forming
  • Fig. 2B shows channels with an irregular cross section that are manufactured by extrusion.
  • the structure of the bending machine shown in Fig. 1 includes: two pairs of supporting units 2 for rotatably supporting the metal material 1; an feeding apparatus 3 that is provided at the upstream side of the supporting units 2 and successively or continuously feeds the metal material 1; and a movable roller die 4 that is provided at the downstream side of the two pairs of supporting units 2, clamps the metal material 1, and controls the supporting position of the metal material 1 and/or the moving speed thereof.
  • the structure of the bending machine further includes: a high-frequency heating coil 5 that is provided around the outer circumference of the metal material 1 on the entrance side of the movable roller die 4, and locally heats the metal material 1; and a cooling unit 6 that rapidly cools down the heated portion of the metal material 1 to which bending moment is applied.
  • supporting rollers are used as the supporting unit 2, but the present invention is not limited thereto.
  • a supporting guide may be used according to the cross-sectional shape of a metal material used.
  • two pairs of supporting rollers are used, but the number of supporting rollers is not limited to two.
  • a pair of supporting rollers, or three or more pairs of supporting rollers may be used.
  • Figs. 3A and 3B are diagrams illustrating examples of the structure of a supporting guide that can be used as the supporting unit according to the present invention.
  • Fig. 3A shows the cross-sectional structure of the supporting guide and a rotating mechanism provided in the supporting guide
  • Fig. 3B is a perspective view illustrating the general appearance of the supporting guide 2.
  • the supporting guide 2 shown in Fig. 3 rotatably supports a rectangular tube 1, which is a workpiece, and includes means for preventing the heating of the supporting guide that is disposed close to the heating unit (the high-frequency heating coil 5 shown in Fig. 1).
  • the means for preventing the heating of the supporting guide is preferably made of a non-magnetic material.
  • the means for preventing the heating of the supporting guide may be divided into two or more segments, and an insulating material, such as Teflon, may be attached to the divided segments, in order to effectively prevent the supporting guide from being heated.
  • a rotating mechanism including a driving motor 10 and a rotational gear 10a is directly connected to the supporting guide 2 such that the supporting guide 2 can be rotated in the circumferential direction in synchronization with the rotation of the pushing apparatus, which will be described in detail below. Therefore, when the metal material 1 is twisted, it is possible to accurately deform the metal material 1.
  • the supporting rollers shown in Fig. 1 or the supporting guide shown in Fig. 3 can be used as the supporting unit for the metal material 1.
  • the supporting rollers are used as the supporting unit.
  • Fig. 4 is a diagram illustrating the structure of a core processing section of the bending machine according to the present invention.
  • the two pairs of supporting rollers 2 for supporting the metal material 1 are provided, and the movable roller die 4 is arranged at the downstream side of the supporting rollers 2.
  • the high-frequency heating coil 5 and the cooling unit 6 are arranged on the entrance side of the movable roller die 4.
  • a preheating unit 5a is provided between the two pairs of supporting rollers 2, and a lubrication unit 8 for supplying a lubricant is provided at the entrance of the movable roller die 4 so as to be close to the movable roller die.
  • the movable roller die 4 clamps the metal material 1 passing through the two pairs of supporting rollers 2, and controls the supporting position and/or the moving speed thereof. Then, the high-frequency heating coil 5 provided around the outer circumference of the metal material 1 locally heats the metal material 1 to bend the metal material 1, and the cooling unit 6 provided around the outer circumference of the metal material 1 rapidly cools down the bent portion. During the bending operation, since the high-frequency heating coil 5 heats the metal material 1 passing through the supporting rollers 2, the yield point of a portion of the metal material 1 bent by the movable roller die 4 is dropped, and deformation resistance is lowered, which makes it easy to bend the metal material 1.
  • the movable roller die 4 clamps the metal material 1 using movable rolls, it is possible to retard the generation of seizure defects on the surfaces of the die despite clamping the heated metal material 1.
  • the lubricant is supplied to the movable roller die. Therefore, even when scales generated from the heated portion of the metal material 1 are migrated into the movable roller die, the lubricant can prevent the generation of seizure defects on the surface of the movable roller die.
  • Fig. 5 is a diagram schematically illustrating the structure of each of the heating unit and the cooling unit provided in the bending machine according to the present invention.
  • the ring-shaped high-frequency heating coil 5 is provided around the outer circumference of a metal material to be heated, and heats the metal material at a temperature at which the heated portion of the metal material can be plastically deformed concentrically. Then, bending moment is applied to the heated portion of the metal material by the action of the movable roller die, and the cooling unit 6 injects the cooling fluid to quench the heated portion of the metal material. Before high frequency heating, the metal material is held by the two pairs of supporting rollers.
  • the heating unit and the cooling unit are integrated into one-piece, but the present invention is not limited thereto.
  • the heating coil may be separated from the cooling unit.
  • this bending method it is possible to successively and continuously heat the metal material at a temperature at which coarse grains are not generated and at an A 3 transformation point or more.
  • the locally heated portion of the metal material is plastically deformed by the movable roller die, and immediately the cooling fluid is injected to the deformed portion, which makes it possible to ensure a cooling rate of 100°C/sec or more.
  • the metal material subjected to bending can have excellent shape fixability and stable quality. For example, even when a metal material having low strength is bent as a starting material, it is possible to increase the strength of the metal material by uniform quenching, and thus obtain a metal material having a tensile strength of 900 MPa or more, preferably, 1300 MPa or more.
  • the metal material is thick in wall thickness, in some cases, it is difficult to ensure a cooling rate of 100°C/sec or more.
  • the metal material is a circular tube, a rectangular tube, or a trapezoidal tube with a closed cross section (metal tube), a mandrel as a cooling unit can be inserted into the metal material having the closed cross section.
  • Fig. 6 is a diagram illustrating the structure of the mandrel that is inserted into the metal material having the closed cross section (metal tube) in order to ensure the cooling rate of the heavy-wall metal material.
  • a mandrel 6a can be inserted into the metal material as a cooling unit. It is possible to ensure the cooling rate by supplying a cooling medium into the mandrel 6a in synchronization with the cooling unit 6 provided around the outer circumference of the metal material 1.
  • a fluid or mist may be supplied into the metal material 1 to cool down the metal material 1, and the mandrel 6a is desirably made of a non-magnetic material or a refractory material.
  • the cooling medium supplied from the cooling unit 6 desirably includes water as a primary component and a rust-preventative agent.
  • a sliding portion of the bending machine is wet by cooling water without the rust-preventative agent, rust occurs, which may cause serious machine malfunctions. Therefore, it is effective that the rust-preventative agent be contained in the cooling water in order to protect the machine.
  • the cooling medium supplied from the cooling unit contains water as a primary componenet, and a quenching agent.
  • a quenching agent mixed with an organic polymer agent has been known.
  • the quenching agent having a predetermined concentration is mixed with water, it is possible to adjust the cooling rate and thus ensure a stable quenching performance.
  • Fig. 7 is a diagram illustrating the structural examples of shift mechanisms for moving the movable roller die in the vertical and horizontal directions and a rotational mechanism for rotating the movable roller die in the circumferential direction in the movable roller die provided in the bending machine according to the present invention.
  • the metal material (circular tube) 1 which is a workpiece, is supported by the movable roller die 4 having four rollers.
  • the shift mechanism for moving the movable roller die in the vertical direction is operated by a driving motor 8
  • the shift mechanism for moving the movable roller die in the horizontal direction is operated by a driving motor 9.
  • the rotational mechanism for rotating the movable roller die in the circumferential direction is operated by a driving motor 10.
  • a tilt mechanism for inclining the movable roller die 4 in the horizontal and vertical directions is not shown, the tilt mechanism used in the present invention is not limited to a specifically limited structure, but any tilt mechanism may be used.
  • Fig. 8 is a diagram illustrating the operation of a moving mechanism for moving the movable roller die provided in the bending machine according to the present invention in the forward or backward direction.
  • the high-frequency heating unit and/or the cooling unit can have, independently or in common, a moving mechanism for moving the unit in the forward or backward direction.
  • This structure makes it possible to ensure synchronization with the movable roller die and to heat the leading end of a metal tube at the beginning of bending. As a result, it is possible to improve workability and operability when the metal tube is mounted or demounted.
  • Figs. 9A to 9C are diagrams illustrating examples of the configuration of the movable roller die provided in the bending machine of the present invention.
  • Fig. 9A shows a movable roller die including two rollers when a metal material is a member with a closed cross section such as a circular tube
  • Fig. 9B shows a movable roller die including two rollers when a metal material is a member with a closed cross section such as a rectangular tube or a material with an open cross section, such as a channel
  • Fig. 9C shows a movable roller die including four rollers when a metal material is a member with a closed cross section such as a rectangular tube or a member with an irregular cross section, such as a channel.
  • the roll caliber type of the movable roller die 4 can be designed according to the cross section of the metal material 1.
  • the number of rollers is not limited to 2 or 4, as shown in Figs. 9A to 9C, but the movable roller die may include three rollers.
  • the metal material used for bending can have a closed cross section with a circular shape, a rectangular shape, a trapezoidal shape, or a complex shape, an open cross section formed by a roll forming operation, or an irregular cross section formed by an extrusion operation.
  • the metal material 1 has a substantially rectangular cross section, as shown in Fig. 9C, it is desirable that the movable roller die be composed of four rollers.
  • a rotational mechanism for rotating in a circumferential direction can be provided in the movable roller die 4 in order to twist the metal material.
  • the feeding apparatus 3 can be provided with a chuck mechanism 7 capable of holding and rotating the metal material 1 in the circumferential direction, which serves as a rotational mechanism.
  • the following methods can be used: a method of twisting the leading end of the metal material using the rotational mechanism of the movable roller die; and a method for twisting the rear end of the metal material using the rotational mechanism of the pushing apparatus.
  • a method of twisting the rear end of the metal material using the rotational mechanism of the feeding apparatus is employed, a compact machine structure is obtained.
  • the method of twisting the leading end of the metal material using the rotational mechanism of the movable roller die as shown in Fig. 7, there is a fear that the scale of the bending machine will increase.
  • both the methods can be used to twist the metal material.
  • a rotational mechanism for rotating in the circumferential direction may be provided in the supporting unit (the supporting roller or the supporting guide), which makes it possible to rotate the metal material in the circumferential direction in synchronization with the rotation of the feeding apparatus.
  • the method of twisting the leading end of the metal material using the rotational mechanism of the movable roller die or the method of twisting the rear end of the metal material using the rotational mechanism of the feeding apparatus can be used to accurately twist the metal material in synchronization with the supporting unit.
  • a roller driving and rotating mechanism may be provided in the movable roller die.
  • the roller can be driven and rotated by, for example, a driving motor according to the feed amount of the metal material pushed by the feeding apparatus. That is, when compressive stress exerted on a bent portion is reduced and the rotational speed of the rollers of the movable roller die is controlled so as to be synchronized with the feed amount of the metal material fed by the feeding apparatus, it is possible to apply tensile stress to the bent portion, and the avialble bending range is widened. In addition, it is possible to improve the bending accuracy of a metal material.
  • the bending machine according to the present invention includes a preheating unit at the upstream side of the heating unit.
  • the preheating unit can perform preferential heating or plural-stage heating on the metal material.
  • the preheating unit performs plural-stage heating, it is possible to disperse heating load of the metal material, and thus improve bending efficiency.
  • Fig. 10 is a diagram illustrating the operation of the preheating unit that performs prefrential heating on the metal material.
  • the metal material 1 is disposed so as to off-set from the center of the high-frequency preheating coil 5a in a direction in which the metal material is bent by the movable roller die.
  • the temperature of the heated portion of the metal material 1 to be the inner radius side of the bend can be controlled to be lower than that of the outer radius side of the bend.
  • the metal material 1 is disposed such that a portion A is close to the high-frequency preheating coil 5a, so that the temperature of the outer surface of the portion A corresponding to the outer radius side of the bent portion is higher than the temperature of the outer surface of a portion B corresponding to theinner radius side of the bent portion.
  • the structure of the heated portion of the metal material 1 can effectively prevent the wrinkles on the inner radius side of the bent portion and cracking on the outer radius side of the bent portion.
  • a lubricant can be supplied to the movable roller die. Therefore, even when scales generated from the heated portion of the metal material are migrated in the movable roller die, the lubricant can retard the generation of seizure defects on the surface of the movable roller die.
  • a cooling fluid can be supplied to the movable roller die.
  • a cooling pipe is provided in the movable roller die in the vicinity of a portion for supporting the metal material, and the cooling fluid is supplied to the movable roller die through the cooling pipe. In this way, the movable roller die is cooled down by the cooling fluid. As a result, it is possible to prevent decrease of the strength of the movable roller die, the lowering of bending accuracy due to thermal expansion of the movable roller die, and seizure defects on the surface of the movable roller die.
  • Fig. 11 is a diagram illustrating the overall structure and arrangement of an articulated robot that is applicable to the bending machine according to the present invention.
  • an articulated robot 11 for the movable roller die 4 can be provided at the downstream side of the bending machine.
  • the articulated robot 11 for the movable roller die includes a fixed surface 12 that is fixed to an operating surface, three arms 13, 14, and 15, and three joints 16, 17, and 18 that connect the arms 13, 14, and 15, respectively, and each of these can rotate on its shaft thereof.
  • the movable roller die 4 is attached to the leading arm 15 of the articulated robot 11.
  • Fig. 12 is a diagram illustrating another example of the structure of the articulated robot that is applicable to the bending machine according to the present invention.
  • the bending machine shown in Fig. 11 only the articulated robot for the movable roller die is provided.
  • both the articulated robot 11 for the heating unit and the cooling unit, and the articulated robot 11 for the movable roller die can be concurrently provided.
  • the use of the two articulated robots makes it possible to further improve bending efficiency.
  • the articulated robots can perform a series of operations, such as forward and backward movement, rotation, and translation, performed by the shift mechanism, the tilt mechanism, and the moving mechanism of the movable roller die 4, on the basis of control signals. That is, during the bending of the metal material, the articulated robots can perform a total of six types of operations performed by manipulators, on the basis of the control signals. As a result, it is possible to improve bending efficiency and reduce the scale of a bending machine.
  • a workpiece with a closed cross section having a circular shape or the like or an open cross section is provided to the bending machine according to the present invention.
  • An electric resistance welded steel tube has been generally used as the material with a circular closed cross section of a circular tube, and a steel material made by roll forming has been generally used as the material with the open cross section.
  • Fig. 13 is a diagram illustrating the overall structure of an electric resistance welded steel tube manufacturing line that is used to manufacture a workpiece.
  • An electric resistance welded steel tube manufacturing line 19 is used to manufacture steel tube from a strip-shaped steel sheet 20.
  • the electric resistance welded steel tube manufacturing line 19 includes an uncoiler 21 for continuously unrolling into the strip-shaped steel sheet 20 from a strip-shaped steel sheet roll, a forming apparatus 22 having a plurality of roll forming devices that form the unrolled strip-shaped steel sheet 20 into tube having a predetermined cross-sectional shape, a welding apparatus 23 having a welding machine that welds the opposite edges of the strip-shaped steel sheet to each other to form continuous steel tube, a weld bead cutter, a post-annealing apparatus, a post-processing apparatus 24 that adjusts the size of the continuous tube to a predetermined dimension, and a cutting apparatus 25 having a flying cutter for cutting the steel tube having the predetermined dimension to a necessary length, which are sequentially arranged in
  • Fig. 14 is a diagram illustrating the overall structure of a roll forming line used to manufacture a workpiece.
  • a roll forming line 26 is used to form the strip-shaped steel sheet 20 into a predetermined shape.
  • the roll forming line 26 includes the uncoiler 21 that the strip-shaped steel sheet 20 as a metal material is unwound and unrolled from the coil, a forming apparatus 27 having roll forming devices that form the strip-shaped steel sheet 20 unrolled by the uncoiler 21 into a predetermined shape, and a cutting apparatus 28 having a flying cutter that continuously cuts the strip-shaped steel sheet 20 that has been formed into a predetermined shape by the roller forming machines to a predetermined length.
  • a workpiece manufactured by the electric resistance welded steel tube manufacturing line 19 shown in Fig. 13 or the roll forming line 26 shown in Fig. 14 is provided into a bending machine as a metal material to be bent.
  • a bending machine As a metal material to be bent.
  • the bending machine according to the present invention is sequentially provided at the exit side of the electric resistance welded steel tube manufacturing line 19 or the roll forming line 26. Therefore, a bending-equipment line from the supply side of workpiece to the overall bending machine becomes compact, and it is possible to appropriately adjust operation conditions of the bending equipment. As a result, it is possible to effectively perform a bending operation to manufacture accurate and inexpensive bent products.
  • a method of bending a metal material, a bending machine, and a bending-equipment line according to the present invention, even when there is a need for bending a metal material in various shapes, such as in a two-dimensional continuous bending operation in which the metal material is two-dimensionally bent in different directions (for example, an S shape) or in a three-dimensional continuous bending operation in which the metal material is three-dimensionally bent in different directions, and even when there is a need for bending a metal material having high strength, the metal material is uniformly cooled down. Therefore, it is possible to effectively obtain a metal material having excellent shape fixability despite having high strength, and uniform hardness distribution at a low cost.
  • the movable roller die rotatably clamps a metal material, it is possible to retard the generation of seizure defects on the surface of the movable roller die. Therefore, the accuracy of a bending operation can be ensured, and a bending operation can be performed with a high degree of operation efficiency. In this way, the bending method according to the present invention can be widely applied as an art of bending sophisticated and diversified automobile parts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP06714360.2A 2005-03-03 2006-02-23 Procédé de traitement de cintrage d'un matériau métallique et produit cintré Expired - Fee Related EP1857195B8 (fr)

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EP12174983A EP2511020A3 (fr) 2005-03-03 2006-02-23 Procédé de cintrage d'un matériau métallique, machine de cintrage, équipement de ligne de cintrage et produit plié

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JP2005059571 2005-03-03
JP2005242441 2005-08-24
PCT/JP2006/303220 WO2006093006A1 (fr) 2005-03-03 2006-02-23 Procédé de traitement de cintrage pour matériau de métal, appareil de traitement de cintrage, ligne d’équipement de traitement de cintrage et produit cintré obtenu ainsi

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EP12174983A Division EP2511020A3 (fr) 2005-03-03 2006-02-23 Procédé de cintrage d'un matériau métallique, machine de cintrage, équipement de ligne de cintrage et produit plié

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EP1857195A4 EP1857195A4 (fr) 2011-05-04
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EP12174983A Withdrawn EP2511020A3 (fr) 2005-03-03 2006-02-23 Procédé de cintrage d'un matériau métallique, machine de cintrage, équipement de ligne de cintrage et produit plié

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008113562A1 (fr) * 2007-03-20 2008-09-25 Universität Dortmund Procédé et dispositif pour le pliage de profilés
WO2009076625A1 (fr) * 2007-12-12 2009-06-18 Allied Tube & Conduit Corporation Cintrage de profils metalliques dans un processus en ligne continu
EP2390021A1 (fr) * 2009-01-21 2011-11-30 Sumitomo Metal Industries, Ltd. Élément creux
US8316683B2 (en) 2007-04-04 2012-11-27 Sumitomo Metal Industries, Ltd. Method of manufacturing a bent product and an apparatus and a continuous line for manufacturing the same
DE102013103357A1 (de) 2013-04-04 2014-10-09 Benteler Automobiltechnik Gmbh Vorrichtung und Verfahren zum Biegen eines metallischen Rohrs
WO2016173583A1 (fr) * 2015-04-28 2016-11-03 AWS Schäfer Technologie GmbH Procédé de cintrage par induction d'un tube résistant à la pression de grande épaisseur de paroi et de grand diamètre
US10071774B2 (en) 2014-05-27 2018-09-11 Nippon Steel & Sumitomo Metal Corporation Joining structure for member in vehicle body
US10543519B2 (en) 2014-05-27 2020-01-28 Nippon Steel Corporation Manufacturing method for bent member and hot-bending apparatus for steel material
WO2020052890A1 (fr) * 2018-09-12 2020-03-19 Wafios Aktiengesellschaft Procédé de fabrication d'une pièce pliée et machine de pliage pour la mise en œuvre du procédé

Families Citing this family (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE527717C2 (sv) * 2004-12-13 2006-05-23 Sunstrip Ab Metod för tillverkning av en värmeväxlare och ett system för utförande av metodend
KR101748540B1 (ko) 2008-01-28 2017-06-16 신닛테츠스미킨 카부시키카이샤 합금화용융아연도금 열처리 강재 및 그 제조방법
CA2738377C (fr) 2008-10-28 2013-07-16 Sumitomo Metal Industries, Ltd. Procede et dispositif de fabrication de produit coude
PT2345549E (pt) * 2008-11-12 2013-11-13 Nippon Steel & Sumitomo Metal Corp Pré-forma de braço e método de fabricar a mesma
WO2010082584A1 (fr) * 2009-01-14 2010-07-22 住友金属工業株式会社 Élément creux, et dispositif de fabrication et procédé de fabrication de celui-ci
CA2750206C (fr) 2009-01-21 2013-10-15 Sumitomo Metal Industries, Ltd. Materiau metallique incurve et procede de fabrication associe
JP5477016B2 (ja) * 2009-02-03 2014-04-23 新日鐵住金株式会社 亜鉛系めっき熱処理鋼材の製造方法
ES2517315T3 (es) * 2009-05-19 2014-11-03 Nippon Steel & Sumitomo Metal Corporation Dispositivo de curvado
ES2560443T3 (es) 2009-05-19 2016-02-19 Nippon Steel & Sumitomo Metal Corporation Aparato de curvado
PL2359949T3 (pl) * 2009-07-14 2014-03-31 Nippon Steel & Sumitomo Metal Corp Urządzenie i sposób dla wytwarzania wygiętego elementu
WO2011024741A1 (fr) 2009-08-25 2011-03-03 住友金属工業株式会社 Elément plié et dispositif et procédé de fabrication correspondants
JP5520571B2 (ja) * 2009-10-20 2014-06-11 新日鐵住金株式会社 焼入れ鋼材の製造装置
JP5520570B2 (ja) * 2009-10-20 2014-06-11 新日鐵住金株式会社 焼入れ鋼材である屈曲部材の製造装置
WO2011083816A1 (fr) 2010-01-06 2011-07-14 住友金属工業株式会社 Procédé de fabrication d'un élément de flexion et dispositif de fabrication d'un élément de flexion
EP2523530B1 (fr) 2010-01-06 2016-07-13 Nippon Steel & Sumitomo Metal Corporation Bobine thermique à induction, appareil pour fabriquer une pièce et procédé de fabrication
KR101203637B1 (ko) * 2010-03-03 2012-11-23 주식회사 포스코 소재의 성형장치
KR101235752B1 (ko) * 2010-03-03 2013-02-21 주식회사 포스코 국부가열 및 점진적 성형을 이용한 굽힘 및 비틀림 성형방법
BR112012022919A2 (pt) 2010-03-11 2018-05-22 Sumitomo Metal Ind aparelho de posicionamento, sistema de trabalho, e aparelho de trabalho a quente
JP5729059B2 (ja) * 2011-03-22 2015-06-03 新日鐵住金株式会社 熱処理鋼材又は曲げ部材の製造装置及び製造方法
CN102248042B (zh) * 2011-06-01 2014-04-30 二重集团（德阳）重型装备股份有限公司 复合弯曲方法及专用中频弯管机
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CN104174727B (zh) * 2013-05-23 2016-09-07 江苏汇能锅炉有限公司 一种弯管机的新型输送弯曲装置
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EP3151985B1 (fr) * 2014-06-06 2021-12-01 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Cintreuse et procédé correspondant
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WO2016056517A1 (fr) 2014-10-07 2016-04-14 新日鐵住金株式会社 Appareil et procédé de refroidissement pour matériau en acier
WO2016056514A1 (fr) * 2014-10-08 2016-04-14 新日鐵住金株式会社 Produit d'acier traite thermiquement possedant une haute resistance et une excellente aptitude au traitement de conversion chimique, et son procede de fabrication
JP6657568B2 (ja) * 2015-02-27 2020-03-04 日本製鉄株式会社 曲げ部材の製造方法および製造装置
US9637175B2 (en) * 2015-08-13 2017-05-02 Ford Global Technologies, Llc Extruded vehicle body component
CN105396915A (zh) * 2015-12-29 2016-03-16 天津市天鹏建筑器材有限公司 一种型材弯曲设备的废料回收机构
JP6569534B2 (ja) * 2016-01-06 2019-09-04 日本製鉄株式会社 ねじり部材の製造方法及び製造装置
JP6750226B2 (ja) * 2016-01-07 2020-09-02 日本製鉄株式会社 ３次元熱間曲げ焼入れ装置、３次元熱間曲げ焼入れ加工部材の製造方法、および自動車用構造部材の製造方法
JP6210171B2 (ja) * 2016-03-09 2017-10-11 新日鐵住金株式会社 焼入れ鋼材の製造方法
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WO2017154796A1 (fr) * 2016-03-09 2017-09-14 新日鐵住金株式会社 Procédé permettant la fabrication de matériau en acier trempé
CN108884511A (zh) 2016-03-31 2018-11-23 新日铁住金株式会社 热处理装置、钢材的热处理方法及钢材的热弯曲加工方法
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KR102520707B1 (ko) * 2022-08-12 2023-04-12 주식회사 대성사 압출기용 가변곡률 성형장치

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB754907A (en) * 1953-10-20 1956-08-15 Andre Huet Improvements in methods of and apparatus for bending tubes
US4061005A (en) * 1975-09-18 1977-12-06 Daiichi Koshuha Kogyo Kabushiki Kaisha Method and apparatus for continuous bending of elongated materials
US4195506A (en) * 1977-06-22 1980-04-01 Daiichi Koshuha Kogyo Kabushiki Kaisha Method and apparatus for bending elongated materials
DE3523025A1 (de) * 1985-06-27 1987-01-02 Siemens Ag Verfahren und vorrichtung zum biegen von langgestreckten metallischen werkstuecken
JPH04105716A (ja) * 1990-08-27 1992-04-07 Dai Ichi High Frequency Co Ltd 湾曲した異形断面らせん条材の製造方法及び装置
JPH05212450A (ja) * 1992-02-07 1993-08-24 Hashimoto Forming Ind Co Ltd 長尺材の曲げ加工方法及び装置
JPH05302119A (ja) * 1992-03-27 1993-11-16 Sumitomo Metal Ind Ltd 高強度自動車部品の製造方法
JPH06182453A (ja) * 1992-12-17 1994-07-05 Mazda Motor Corp 金属部材の曲げ加工装置
US20030038489A1 (en) * 2000-01-14 2003-02-27 Edward Renzzulla Sweep forming assembly and method

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL279654A (fr) * 1961-07-17
JPS477396Y1 (fr) * 1963-12-23 1972-03-18
JPS5059263A (fr) 1973-09-28 1975-05-22
JPS5059264A (fr) * 1973-09-28 1975-05-22
US4062216A (en) * 1974-07-23 1977-12-13 Daiichi Koshuha Kogyo Kabushiki Kaisha Metal bending methods and apparatus
US3956916A (en) * 1975-02-24 1976-05-18 Herkner Edward C Method and apparatus for making fishing lures
US5316849A (en) * 1989-10-26 1994-05-31 Minnesota Mining And Manufacturing Company Reclosable mechanical fastener based on a composite article
JP3195082B2 (ja) * 1992-12-17 2001-08-06 マツダ株式会社 金属部材の曲げ加工装置
JP3345063B2 (ja) * 1992-12-17 2002-11-18 マツダ株式会社 金属部材の曲げ加工装置
JP3443884B2 (ja) * 1993-07-09 2003-09-08 日産自動車株式会社 軸線曲げ加工方法およびその装置
JPH10140251A (ja) * 1996-11-08 1998-05-26 Sumitomo Metal Ind Ltd 電縫管のシーム熱処理設備
WO2000013816A1 (fr) * 1998-09-08 2000-03-16 Tri Engineering Company Limited Dispositif d'usinage du type laminoir a galets
JP2000158048A (ja) 1998-11-20 2000-06-13 Hitachi Ltd 押し曲げ方式の高周波加熱ベンダー
JP4591908B2 (ja) * 2003-12-15 2010-12-01 臼井国際産業株式会社 パイプの曲げ加工装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB754907A (en) * 1953-10-20 1956-08-15 Andre Huet Improvements in methods of and apparatus for bending tubes
US4061005A (en) * 1975-09-18 1977-12-06 Daiichi Koshuha Kogyo Kabushiki Kaisha Method and apparatus for continuous bending of elongated materials
US4195506A (en) * 1977-06-22 1980-04-01 Daiichi Koshuha Kogyo Kabushiki Kaisha Method and apparatus for bending elongated materials
DE3523025A1 (de) * 1985-06-27 1987-01-02 Siemens Ag Verfahren und vorrichtung zum biegen von langgestreckten metallischen werkstuecken
JPH04105716A (ja) * 1990-08-27 1992-04-07 Dai Ichi High Frequency Co Ltd 湾曲した異形断面らせん条材の製造方法及び装置
JPH05212450A (ja) * 1992-02-07 1993-08-24 Hashimoto Forming Ind Co Ltd 長尺材の曲げ加工方法及び装置
JPH05302119A (ja) * 1992-03-27 1993-11-16 Sumitomo Metal Ind Ltd 高強度自動車部品の製造方法
JPH06182453A (ja) * 1992-12-17 1994-07-05 Mazda Motor Corp 金属部材の曲げ加工装置
US20030038489A1 (en) * 2000-01-14 2003-02-27 Edward Renzzulla Sweep forming assembly and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006093006A1 *

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* Cited by examiner, † Cited by third party
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WO2008113562A1 (fr) * 2007-03-20 2008-09-25 Universität Dortmund Procédé et dispositif pour le pliage de profilés
US9227236B2 (en) 2007-03-20 2016-01-05 Universität Dortmund Method and device for profile bending
US8316683B2 (en) 2007-04-04 2012-11-27 Sumitomo Metal Industries, Ltd. Method of manufacturing a bent product and an apparatus and a continuous line for manufacturing the same
WO2009076625A1 (fr) * 2007-12-12 2009-06-18 Allied Tube & Conduit Corporation Cintrage de profils metalliques dans un processus en ligne continu
EP2390021A4 (fr) * 2009-01-21 2015-04-08 Nippon Steel & Sumitomo Metal Corp Élément creux
EP2390021A1 (fr) * 2009-01-21 2011-11-30 Sumitomo Metal Industries, Ltd. Élément creux
DE102013103357B4 (de) * 2013-04-04 2015-02-05 Benteler Automobiltechnik Gmbh Vorrichtung und Verfahren zum Biegen eines metallischen Rohrs
DE102013103357A1 (de) 2013-04-04 2014-10-09 Benteler Automobiltechnik Gmbh Vorrichtung und Verfahren zum Biegen eines metallischen Rohrs
US10071774B2 (en) 2014-05-27 2018-09-11 Nippon Steel & Sumitomo Metal Corporation Joining structure for member in vehicle body
US10543519B2 (en) 2014-05-27 2020-01-28 Nippon Steel Corporation Manufacturing method for bent member and hot-bending apparatus for steel material
WO2016173583A1 (fr) * 2015-04-28 2016-11-03 AWS Schäfer Technologie GmbH Procédé de cintrage par induction d'un tube résistant à la pression de grande épaisseur de paroi et de grand diamètre
CN107073543A (zh) * 2015-04-28 2017-08-18 Aws舍费尔技术有限公司 用于使具有大壁厚以及大直径的抗压管感应弯曲变形的方法
CN107073543B (zh) * 2015-04-28 2019-01-15 Aws舍费尔技术有限公司 用于使具有大壁厚以及大直径的抗压管感应弯曲变形的方法
WO2020052890A1 (fr) * 2018-09-12 2020-03-19 Wafios Aktiengesellschaft Procédé de fabrication d'une pièce pliée et machine de pliage pour la mise en œuvre du procédé

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KR20070102594A (ko) 2007-10-18
EP1857195B1 (fr) 2014-04-30
EP2511020A2 (fr) 2012-10-17
US20080066517A1 (en) 2008-03-20
WO2006093006A1 (fr) 2006-09-08
CN101132869B (zh) 2012-10-10
EP2511020A3 (fr) 2012-11-14
CN101132869A (zh) 2008-02-27
EP1857195A4 (fr) 2011-05-04
KR100878647B1 (ko) 2009-01-15

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