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WO2006093006A1 - 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
WO2006093006A1
WO2006093006A1 PCT/JP2006/303220 JP2006303220W WO2006093006A1 WO 2006093006 A1 WO2006093006 A1 WO 2006093006A1 JP 2006303220 W JP2006303220 W JP 2006303220W WO 2006093006 A1 WO2006093006 A1 WO 2006093006A1
Authority
WO
WIPO (PCT)
Prior art keywords
bending
metal material
movable roller
roller die
heating
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.)
Ceased
Application number
PCT/JP2006/303220
Other languages
English (en)
Japanese (ja)
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 EP06714360.2A priority Critical patent/EP1857195B8/fr
Priority to CN2006800069674A priority patent/CN101132869B/zh
Publication of WO2006093006A1 publication Critical patent/WO2006093006A1/fr
Priority to US11/896,319 priority patent/US20080066517A1/en
Anticipated expiration legal-status Critical
Priority to US12/718,367 priority patent/US8919171B2/en
Priority to US12/718,390 priority patent/US8863565B2/en
Priority to US14/485,871 priority patent/US20150004430A1/en
Priority to US14/552,799 priority patent/US20150132600A1/en
Ceased legal-status Critical Current

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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
    • 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 apparatus and a bending equipment column thereof, and more specifically, in the case of continuous bending (for example, S-shaped bending) in which the bending direction of the metal material is two-dimensionally different.
  • continuous bending for example, S-shaped bending
  • it relates to a bent product using them.
  • both Japanese Patent Application Laid-Open Nos. 50-59263 and 2816000 propose a method of bending a metal tube or the like while heat-treating it. Specifically, the processing tip side of a metal tube or the like is clamped to a rotatable arm and heated by a heating device.
  • a bending calorie method (a method proposed in Japanese Patent Application Laid-Open No. 50-59263) in which the heating unit is bent and deformed by appropriately moving and then cooled, and further, the torsional force and bending force are applied to the heating unit.
  • a bending method (a method proposed in Japanese Patent No. 2816000) in which the material is bent and deformed while being torsionally deformed.
  • Bending force methods proposed in both of the above-mentioned publications are processing methods classified into so-called gripping bending calories, both of which can freely rotate a processing tip of a metal tube or the like. Since it is necessary to clamp with an arm, the feed rate of the metal pipe to be processed cannot be increased. Moreover, since the arm must be returned each time it is clamped by the arm, the feed rate fluctuates significantly, requiring complex control of the heating and cooling rates, and ensuring the required quenching accuracy. Can not ,.
  • Japanese Patent Application Laid-Open No. 2000-158048 is a high-frequency heating bender based on the push-through bending process, and the push-bending roller can be moved in a three-dimensional direction.
  • a high-frequency heating vendor to support.
  • the push-bending roller is moved across the object to be bent and moved to the side of the object to be bent in the opposite direction and bent to contact the side surface. Therefore, for example, even in the case of continuous bending in which the bending directions are two-dimensionally different, such as S-shaped bending, it is possible to eliminate the setup work for rotating the workpiece to be bent by 180 degrees.
  • the high-frequency heating bender disclosed in Japanese Patent Application Laid-Open No. 2000-158048 does not have a means for clamping both sides of the workpiece to be bent, which is caused by residual stress due to cooling after heating by high-frequency. Since deformation is likely to occur, the processing speed is difficult to ensure a predetermined dimensional accuracy, and it is difficult to increase the degree of bending.
  • a fixed die and a movable gyroscope that can move in a three-dimensional direction are provided in place of the above-described gripping bending process or a push-bending roller of a high-frequency heating bender.
  • a push-through bending apparatus equipped with a heating means for heating a metal member to a temperature corresponding to the curvature of the bending process of the metal member by a gyro die.
  • the bending apparatus proposed in Japanese Patent No. 3195083 is based on push-through bending, but after hot working using a low-strength metal blank as a starting material, quenching is performed. It is not intended to increase the strength and obtain a high strength metal material. Further, seizure flaws are likely to occur on the surface of the movable gyro die as the metal member is heated, so that further improvement is required as a hot bending apparatus.
  • the present invention has been made in view of the above-described problems, and is a case where a wide variety of bending shapes are required when bending a metal material due to various structures of automotive parts.
  • the bending accuracy can be ensured, and the metal material bending method with excellent work efficiency can be applied along with the bending method.
  • the purpose is to provide processing equipment and bending equipment lines.
  • the bending method of the present invention includes a workpiece held by a supporting means.
  • a metal material push-bending method in which bending is performed downstream of the support means while sequentially or continuously extruding the work material from the upstream side, the movable roller die provided on the downstream side of the support means While clamping the metal material and controlling the position or / and moving speed of the movable roller die, the heating means and the cooling means disposed on the outer periphery of the metal material on the movable roller die entrance side,
  • the metal material is heated to a temperature range where local plastic deformation can be performed and a temperature range where quenching can be performed, and a bending moment is applied to the heating portion, followed by rapid cooling.
  • the raw material tube is successively heated by a high-frequency heating coil to a temperature above the A transformation point and at a temperature at which the structure does not become coarse,
  • the heated local area is plastically deformed using a movable roller die, and immediately after that water or oil-based cooling medium or other cooling liquid, or gas or mist is sprayed on the outer or inner / outer surface force of the tube. Therefore, ensure a cooling rate of 100 ° CZsec or higher.
  • the movable roller die for imparting a bending moment can suppress seizure flaws generated on the surface of the die by the force of clamping the metal material with the movable roller type. It becomes possible.
  • the support means is a method for holding the metal material in a rotatable manner, the occurrence of seizure flaws can be suppressed.
  • the bending method according to the second aspect of the present invention is such that the movable roller die has a vertical shift mechanism, a horizontal shift mechanism, a vertical tilt mechanism, and a horizontal tilt mechanism. Has at least one mechanism.
  • the movable roller die is moved in the front-rear direction. It is possible to have a moving mechanism. By having a forward / backward movement mechanism, the optimal arm length L can be ensured even when the bending radius of the metal material is small, so the size of the processing device can be avoided and bending accuracy can be avoided. Can be secured.
  • the heating means or Z and the cooling means are a vertical shift mechanism, a horizontal shift mechanism, a vertical tilt mechanism,
  • at least one of tilt mechanisms tilting in the left-right direction can be provided. It is possible to synchronize the operation of the movable roller die with the heating means and the cooling means, and by this synchronization, uniform bending can be performed with higher accuracy.
  • the heating means or Z and the cooling means can have a moving mechanism in the front-rear direction. Since the heating means has a moving mechanism, in addition to synchronism with the movable roller die, it is possible to heat the tip of the metal tube at the start of bending, and workability when attaching and removing the metal tube. The operability will be improved.
  • the movable roller die can further have a rotating mechanism in the circumferential direction.
  • torsional deformation can be added.
  • the extrusion device provided on the upstream side of the metal material can have a mechanism for gripping the workpiece and rotating in the circumferential direction. Even if the rotating mechanism of the movable roller die is not used, in addition to the bending shape in which the bending direction of the metal material is two-dimensionally different and the bending shape in which the bending direction is three-dimensionally different, torsional deformation is applied. That's right.
  • the support means further has a rotating mechanism in the circumferential direction, and can rotate in the circumferential direction in synchronization with the rotation of the push-out device. .
  • the rotating end of the movable roller die is not rotated in the circumferential direction, and the rear end portion of the metal material is twisted by the rotation mechanism of the push-out device while synchronizing the support means.
  • by rotating the movable roller die in the circumferential direction, while synchronizing the support means By twisting the rear end of the metal material relatively, it is possible to add more accurate torsional deformation.
  • the roll of the movable roller die further has a drive rotation mechanism, and the roller is driven by a drive motor or the like according to the feed amount of the extrusion feed device. Can be driven.
  • the rotation of the roller is driven only by frictional resistance, compressive stress acts on the bent portion, and the increase in thickness increases on the inner periphery side of the bend. Or buckling may occur.
  • the workpiece is a thin-walled material, bending may be difficult due to these, and the processing accuracy may be deteriorated.
  • the movable roller die is provided with a drive rotation mechanism so as to relieve the compressive stress acting on the bending portion and to synchronize with this according to the feed amount of the extrusion feed device.
  • the roll speed of the movable roller die is controlled, it is possible to apply tensile stress to the bending part, which expands the possible range of bending and improves the accuracy of the product.
  • the movable roller die can be composed of two rolls, three rolls, or four rolls. Further, in the bending care method of the eleventh aspect, Further, in the bending care method of the eleventh aspect, Further, in the bending care method of the eleventh aspect, Further, the metal material to be bent can be a closed cross-section material, an open cross-section material, an irregular cross-section material, or a bar material having various cross-sectional shapes.
  • the roll type of the movable roller die can be designed according to the cross-sectional shape of the metal material to be processed.
  • At least one preheating means is provided on the upstream side of the heating means, and the preheating means performs two-stage heating or uneven heating of the metal material. Can do.
  • the preheating means is used as multi-stage heating, the heating load of the metal material can be distributed, and the bending efficiency can be improved.
  • the preheating means when used for uneven heating of the metal material, for example, the temperature on the bending inner surface side of the heating portion of the metal material is changed to the bending outer surface side based on the bending direction of the metal material by the movable roller die.
  • the temperature is controlled to be lower.
  • a mandrel is inserted into the inner surface of the metal material as the cooling means, and the cooling medium is supplied together with the cooling means arranged on the outer periphery of the metal material or by the mandrel alone. can do. In particular, it is effective to ensure the cooling rate of thick materials.
  • the cooling medium supplied from the cooling means can contain water as a main component and an antifungal agent. If the sliding part gets wet with the cooling water supplied from the cooling device, soot will be generated if the cooling water does not contain an antifungal agent, causing problems from the viewpoint of machine protection. It is effective in terms of machine protection to contain an antifungal agent.
  • the cooling medium supplied from the cooling means can contain water as a main component and a quenching agent.
  • a quenching agent for example, a mixture containing an organic polymer agent is known as a quenching agent.
  • lubricant or Z and a cooling fluid can be supplied to the movable roller die.
  • the lubricant is supplied to the movable roller die, the occurrence of surface seizure can be reduced by the lubricating action even if the movable roller die entrains the scale generated in the heated portion of the metal material.
  • the movable roller die when supplying the cooling fluid to the movable roller die, the movable roller die is cooled by the cooling fluid, so that the strength of the movable roller die is reduced, and the processing accuracy is reduced due to the thermal expansion of the movable roller die. Furthermore, the occurrence of seizure on the surface of the movable roller die can be prevented.
  • an articulated robot having a joint rotatable about at least one axis is provided, and the movable roller die and the heating means or Z
  • at least one of a shift mechanism, a tilt mechanism, and a movement mechanism in the cooling means can be performed by the articulated robot.
  • the manipulator performs the up / down or left / right shift operation required by the movable roller die, heating means, and cooling means when bending the metal tube.
  • the tilting operation that tilts in the left-right direction or the moving operation in the front-rear direction can be a series of operations based on the control signal, As a result, the processing apparatus can be downsized.
  • a movable roller die provided on the downstream side of the means for clamping the metal material and controlling the clamping position or / and its moving speed; and an entrance side of the movable roller die and disposed on the outer periphery of the metal material.
  • an anchor for continuously feeding strip steel plates.
  • a metal material bending apparatus defined in the present invention is continuously arranged on the exit side of the ERW steel pipe production line provided with post-treatment means for post-annealing and sizing as necessary.
  • the uncrosser that continuously feeds the strip steel plate in order to produce the bent cross-section material supplied as the work material also efficiently and inexpensively.
  • a metal material bending carriage device defined in the present invention is continuously arranged on the exit side of a roll forming line comprising a forming means for forming the fed strip steel plate into a predetermined cross-sectional shape.
  • the bent product of the present invention has a tensile strength of 900 by being bent by the metal material bending method or by using the metal material bending apparatus.
  • the metal material of the present invention According to the bending method, bending apparatus and bending equipment row of the metal material of the present invention.
  • a wide variety of bending shapes are required, and continuous bending with different bending directions of metal materials (for example, S-shaped bending) and continuous bending with different bending directions in three dimensions are processed.
  • metal materials for example, S-shaped bending
  • continuous bending with different bending directions in three dimensions are processed.
  • the metal material is uniformly cooled.
  • a metal material can be obtained efficiently and inexpensively.
  • the movable roller die clamps the metal material in a rotatable manner, seizure flaws generated on the die surface can be suppressed, bending accuracy can be ensured, and work efficiency can be improved. Excellent push-through bending is possible. As a result, it can be widely applied as a technology for bending automotive parts that are becoming more sophisticated.
  • FIG. 1 is a diagram showing an overall configuration of a bending apparatus for carrying out the push-through bending process of the present invention.
  • FIG. 2 is a diagram showing a cross-sectional shape of a workpiece that can be applied as a metal material of the present invention.
  • (A) shows a channel of an open cross-section material manufactured by roll forming or the like, and (b) shows an extrusion. Shown are channels of atypical cross-section manufactured in Kaloe.
  • FIG. 3 is a diagram showing a configuration example of a support guide that can be employed as the support means of the present invention.
  • (A) shows a cross-sectional configuration of the support guide and the rotation mechanism provided in the support guide. Show the perspective structure in perspective!
  • FIG. 4 is a diagram for explaining the apparatus configuration of the main part of the bending apparatus of the present invention.
  • FIG. 5 is a diagram showing a schematic configuration example of a heating device and a cooling device employed by the bending apparatus of the present invention.
  • FIG. 6 is a diagram showing a configuration of a mandrel inserted into the inner surface of a closed cross-section material (metal tube material) in order to ensure the cooling rate of the thick material.
  • FIG. 7 is a diagram for explaining a configuration example of the vertical and left / right shift mechanisms and the circumferential rotation mechanism of the movable roller die employed by the bending apparatus of the present invention.
  • FIG. 8 is a diagram for explaining the action of the moving mechanism in the front-rear direction of the movable roller die employed by the bending apparatus of the present invention.
  • FIG. 9 is a diagram showing an example of the shape of the movable roller die employed by the bending apparatus of the present invention.
  • (a) shows a shape composed of two rolls when the metal material is a closed section material such as a round tube, and (b) shows a closed section material such as a rectangular tube or an open channel such as a channel.
  • (C) shows a shape composed of 4 rolls when the metal material is a closed cross-section material such as a rectangular tube, or an irregular cross-section material such as a channel.
  • FIG. 10 is a diagram for explaining the operation when the preheating device is used for partial heating of a metal material.
  • FIG. 11 is a diagram showing the entire configuration and arrangement of an articulated robot applicable to the bending apparatus of the present invention. .
  • FIG. 12 is a diagram showing another configuration example of an articulated robot applicable to the bending apparatus of the present invention.
  • FIG. 13 is a diagram showing the overall configuration of an ERW steel pipe production line used for manufacturing workpieces.
  • FIG. 14 is a diagram showing an overall configuration of a roll forming line used for manufacturing the reinforced construction material.
  • the embodiment of the present invention includes an overall configuration, a configuration example of a support means, a configuration and heating of a processing unit, a configuration example of a cooling device, a configuration of a movable roller die, a preheating means and its action, an articulated robot. This will be divided into the features of the configuration and the bending machine equipment line, and will be explained based on the drawings.
  • FIG. 1 is a diagram showing the overall configuration of a bending apparatus for carrying out the push-through bending process of the present invention.
  • the metal material 1 which is a workpiece that is rotatably held by the support means 2
  • the support means 2 is bent sequentially on the downstream side of the support means 2 while extruding sequentially or continuously from the upstream side. This is a push-through bending method.
  • the cross-sectional shape of the metal material 1 shown in FIG. 1 is a round shape (round tube), but is not limited to this, and workpieces having various cross-sectional shape forces can be applied.
  • a closed cross-section material with a rectangular, trapezoidal or complex shape, an open cross-section material (channel) manufactured by roll forming, etc., an irregular cross-section manufactured by extrusion Material Or rods with various cross-sectional shape forces can be applied.
  • FIG. 2 is a diagram showing a cross-sectional shape of a workpiece applicable as the metal material of the present invention, (a) shows a channel of an open cross-section material manufactured by roll forming or the like, (b) Show the channel of the profile section material produced by extrusion.
  • the bending apparatus of the present invention it is necessary to design the shape of the movable roller die and the support means according to the cross-sectional shape of the metal material to be applied.
  • the apparatus configuration shown in FIG. 1 includes two pairs of support means 2 for holding the metal material 1 rotatably, and an extrusion device 3 for feeding or moving the metal material 1 sequentially or continuously to the upstream side thereof.
  • an extrusion device 3 for feeding or moving the metal material 1 sequentially or continuously to the upstream side thereof.
  • a metal roller 1 is clamped, and a movable roller die 4 for controlling the clamping position and / or moving speed is arranged.
  • a high-frequency heating coil 5 that is disposed on the outer periphery of the metal material 1 and locally heats, and the metal material 1 with a bending moment applied to the heating part is cooled rapidly.
  • Device 6 is arranged.
  • a metal material having a round cross section (round tube) is applied! /, So a support roll is adopted as the support means 2, but the present invention is not limited to this. However, it is possible to adopt a support guide according to the cross-sectional shape of the metal material to be applied. Further, even when the support roll is adopted, as shown in FIG. 1, it is not limited to the configuration of two pairs of support rolls, but can be configured of one pair or more than two pairs. .
  • FIG. 3 is a view showing a configuration example of a support guide that can be employed as the support means of the present invention.
  • (A) shows a cross-sectional configuration of the support guide and the rotation mechanism included in the support guide.
  • the external structure of the guide is shown in a perspective view.
  • the support guide 2 shown in FIG. 3 has a configuration in which the rectangular tube 1 is applied as a workpiece and is rotatably held, but is close to the heating means (the high-frequency heating coil 5 shown in FIG. 1). Because it is installed, it has a means to prevent heating.
  • As a means to prevent heating it is better to manufacture with non-magnetic material, as shown in Fig. 3 (b), and it is divided into two or more parts, and Teflon (registered trademark) etc. It is effective to prevent heating by installing an insulator.
  • a rolling mechanism is provided and, as will be described later, the support guide 2 can rotate in the circumferential direction in synchronization with the rotation of the extrusion device, so that when the metal material 1 is torsionally deformed, accurate deformation is added. Can do.
  • FIG. 4 is a diagram for explaining the apparatus configuration of the main part of the bending apparatus of the present invention.
  • Two pairs of support rolls 2 holding the metal material 1 and a movable roller die 4 are arranged downstream thereof, and a high-frequency heating coil 5 and a cooling device 6 are arranged on the entrance side of the movable roller die 4.
  • a preheating device 5a is provided between the two pairs of support rolls 2, and a lubricant supply device 8 is disposed in the immediate vicinity of the movable roller die on the entrance side.
  • the metal material 1 that has passed through the two pairs of support rolls 2 is clamped by the movable roller die 4, and the outer periphery of the metal material 1 is controlled while controlling the clamping position or / and the moving speed.
  • the metal material 1 is locally heated, bent, and then rapidly cooled.
  • the metal material 1 that has passed through the support roll 2 is heated by the high-frequency heating coil 5, so that the yield point of the bending part of the metal material 1 by the movable roller die 4 decreases. Since the deformation resistance decreases, the bending of the metal material 1 becomes easy.
  • the movable roller die 4 is a movable roller type and clamps the metal material 1, seizure flaws generated on the surface of the die can be suppressed even if the metal member 1 is subjected to calorie heat.
  • the lubricant is supplied to the movable roller die, even if a scale generated in the heating part of the metal material 1 is involved, the occurrence of seizure flaws can be reduced by the lubricating action on the die surface. it can.
  • the cooling fluid is supplied to the movable roller die 4. Since the movable roller die 4 is cooled by the cooling fluid, it is possible to prevent the strength of the movable roller die from being lowered, the processing accuracy from being lowered due to the thermal expansion of the movable roller die, and the occurrence of seizure flaws on the surface of the movable roller die. .
  • FIG. 5 is a diagram showing a schematic configuration example of a heating device and a cooling device employed by the bending apparatus of the present invention.
  • An annular high frequency heating coil 5 is arranged on the outer periphery of the metal material to form the heating part, and the metal material is heated to a temperature at which plastic deformation can be locally performed.
  • quenching is performed by injecting a cooling medium from the cooling device 6.
  • the metal material before high-frequency heating is held by two pairs of support rolls.
  • the example in which the heating device and the cooling device are integrated is shown, but of course, the calo heat coil and the cooling device may be provided separately.
  • the metal material is successively and continuously at the A transformation point or higher and the structure is rough.
  • It can be heated up to the temperature, and it can be heated to a temperature, and plastic deformation is performed using a movable roller die in the local heating part, and immediately after that, a cooling medium is injected, so that the temperature exceeds 100 ° C / sec. A cooling rate can be secured.
  • the metal material subjected to the bending process can ensure excellent shape freezing property and stable quality. For example, even when bending using a low-strength metal material as a starting material, increase the strength by uniform quenching to obtain a metal material with a tensile strength of 900 MPa or more and a metal material equivalent to 13 OOMPa class or more. Can do.
  • the metal material becomes thick, it may be difficult to ensure a cooling rate of 100 ° C Zsec or more, but the metal material is a closed cross-section material such as a round tube, a rectangular tube or a trapezoidal tube (metal tube material). ), The mandrel can be inserted into the inner surface of the closed cross-section material as a cooling means.
  • FIG. 6 is a diagram showing a configuration of a mandrel inserted into the inner surface of a closed cross-section material (metal tube material) in order to ensure the cooling rate of the thick material.
  • a closed cross-section material metal tube material
  • the mandrel 6a which should be cooled with a fluid or mist on the inner surface of the metal material 1 is made of a non-magnetic material or a refractory material.
  • the cooling medium supplied from the cooling means 6 is mainly composed of water. Therefore, it is desirable to contain an antifungal agent. If the sliding part of the processing equipment gets wet with the supplied cooling water, if the anti-fouling agent is not contained in the cooling water, wrinkles may occur, which may cause a fatal device defect. It is effective from the viewpoint of machine protection.
  • the cooling medium supplied from the cooling means contains water as a main component and a quenching agent.
  • a quenching agent a mixture containing an organic polymer agent is known as a quenching agent.
  • FIG. 7 is a diagram for explaining a configuration example of the vertical and left / right shift mechanisms and the circumferential rotation mechanism of the movable roller die employed by the bending apparatus of the present invention.
  • a metal material (round tube) 1 which is a workpiece is clamped by a movable roller die 4 composed of four rolls.
  • the shift mechanism in the vertical direction is configured by the operation of the drive motor 8
  • the shift mechanism in the horizontal direction is configured by the operation of the drive motor 9.
  • the rotation mechanism in the circumferential direction is configured by the operation of the drive motor 10.
  • FIG. 7 does not show the configuration of a tilt mechanism that tilts the movable roller die 4 in the vertical direction and the horizontal direction, the tilt mechanism employed in the present invention does not require a particularly limited configuration. Any configuration can be used.
  • FIG. 8 is a diagram for explaining the action of the moving mechanism in the front-rear direction of the movable roller die employed by the bending apparatus of the present invention.
  • the bending moment M required for bending work is determined by the following equation (A), where L is the arm length (metal working length).
  • the force P acting on the pinch roll (movable roll die) 4 decreases as the arm length L increases.
  • the bending radius is a machining range from a small diameter to a large diameter
  • the machining force P in machining the metal material 1 with a small bending radius is the equipment. It becomes a restriction.
  • the arm length L is increased in accordance with the processing of the metal material 1 with a small bending radius, a large stroke will occur in the shift mechanism and tilt mechanism of the movable roller die when processing a metal material with a large bending radius. It becomes necessary and the processing equipment becomes larger.
  • the high-frequency heating device and the cooling device can each have a moving mechanism in the front-rear direction, either alone or in common.
  • FIG. 9 is a diagram showing an example of the shape of the movable roller die employed by the bending apparatus of the present invention.
  • A is composed of two rolls when the metal material is a closed section material such as a round tube.
  • B shows the shape composed of two rolls when the metal material is a closed cross-section material such as a rectangular tube or an open cross-section material such as a channel, and
  • c shows the shape of the metal material as a rectangular tube.
  • a closed cross-section material such as a channel, or an irregular cross-section material such as a channel
  • the shape is composed of 4 rolls.
  • the roll type of the movable roller die 4 can be designed according to the cross-sectional shape of the metal material 1, and as shown in FIG. Can consist of rolls.
  • the cross-sectional shape of a metal material to be bent can be round, rectangular, trapezoidal or a closed cross-sectional shape with a complicated shape, open cross-sectional shape by roll forming, etc.
  • the cross-sectional shape of the metal material 1 is substantially rectangular, it is desirable that the movable roller die is composed of four rolls as shown in FIG. 9 (c).
  • the movable roller die 4 in order to add torsional deformation to the metal material, can be provided with a rotating mechanism in the circumferential direction as shown in FIG.
  • the extrusion device 3 can be provided with a chuck mechanism 7 that can hold the metal material 1 and rotate it in the circumferential direction, and can have a rotation mechanism.
  • the movable opening A method of twisting and deforming the tip of the metal material using a single-radius rotation mechanism and a method of twisting and deforming the rear end of the metal material using the rotation mechanism of the extrusion device can be employed.
  • a method using a rotation mechanism of an extrusion device results in a compact device structure
  • a method using a rotation mechanism of a movable roller die makes the device configuration large-scale as shown in FIG. Forces that can become: Either method can give torsional deformation to a metal material.
  • the support member (support roller or support guide) is further provided with a rotation mechanism in the circumferential direction, whereby the metal material is rotated in the circumferential direction in synchronization with the rotation of the push-out feeding device.
  • a rotation mechanism in the circumferential direction, whereby the metal material is rotated in the circumferential direction in synchronization with the rotation of the push-out feeding device.
  • torsionally deforming a metal material either the method of twisting the tip of the metal material using the rotating mechanism of the movable roller die or the method of twisting and deforming the rear end of the metal material using the rotation mechanism of the extrusion device Even if is adopted, accurate torsional deformation can be added to the metal material by synchronizing the support means.
  • the movable roller die is provided with a roll drive rotation mechanism, so that the roller is driven to rotate by a drive motor or the like according to the feed amount of the extrusion feed device.
  • a roll drive rotation mechanism so that the roller is driven to rotate by a drive motor or the like according to the feed amount of the extrusion feed device.
  • tensile stress is applied to the bending part. It can also be added, which expands the possible range of bending and improves the processing accuracy of the product.
  • a preheating device is provided on the upstream side of the heating device, and the preheating device can perform two-stage heating of the metal material or more than one stage, or uneven heating.
  • the preheating means is used as multi-stage heating, the heating load of the metal material can be dispersed and the bending efficiency can be improved.
  • FIG. 10 is a diagram for explaining the operation when the preheating device is used for uneven heating of a metal material.
  • the preheating high-frequency heating coil 5a is used as a preheating device for uneven heating of the metal material 1
  • the metal material 1 is biased into the preheating high-frequency heating coil 5a based on the bending direction of the metal material by the movable roller die. Bending in the heating part of the metal material 1 by positioning Control is performed so that the temperature on the inner surface side is lower than the temperature on the outer surface side of the bending.
  • the A side of the metal material 1 is positioned so as to approach the preheating high-frequency heating coil 5a, and the outer surface temperature on the B side corresponding to the inner surface side of the bending is determined.
  • the A side outer surface temperature corresponding to is controlled to be higher.
  • a lubricant can be supplied to the movable roller die.
  • a cooling fluid can be supplied to the movable roller die. Since a cooling pipe is provided inside the movable roller die and in the vicinity of the portion for clamping the metal material, and the cooling fluid is supplied to the movable roller die, the movable roller die is cooled by the cooling fluid. It can prevent the strength of the die from being lowered, the processing accuracy from being lowered due to the thermal expansion of the movable roller die, and the seizure of the surface of the movable roller die.
  • FIG. 11 is a diagram showing the overall configuration and arrangement of an articulated robot applicable to the bending apparatus of the present invention. As shown in FIG. 11, an articulated robot 11 for the movable roller die 4 can be arranged on the downstream side of the bending carriage device.
  • the structure of the articulated robot 11 for the movable roller die consists of a fixed surface 12 fixed to the work surface, three arms 13, 14, 15 and each arm 13, 14, 15 connected to each other. It has three joints 16, 17, 18 that can be rotated around.
  • a movable roller die 4 is attached to the arm 15 at the tip of the articulated robot 11.
  • FIG. 12 is a diagram showing another configuration example of the articulated robot that can be applied to the bending carriage apparatus of the present invention.
  • the joint type robot 11 for the heating device and the cooling device can be provided at the same time as the force for arranging only the joint type robot for the movable roller die.
  • the bending efficiency can be further improved.
  • a shift mechanism with a movable roller die 4 is used when bending a metal material.
  • a closed cross-section material having a shape such as a round shape or an open cross-section material is used as a work material provided to the bending apparatus of the present invention.
  • ERW steel pipes have been widely used as closed cross-section materials for round pipes, and roll-formed steel materials are often used as open cross-section materials.
  • FIG. 13 is a diagram showing an overall configuration of an ERW steel pipe production line used for production of a workpiece.
  • the ERW steel pipe production line 19 is an apparatus for producing a steel pipe from the strip steel plate 20.
  • an uncoiler 21 that continuously feeds the strip steel plate 20 from the strip steel plate roll, and a forming means 22 including a plurality of roll forming machines that form the fed strip steel plate 20 into a pipe having a predetermined cross-sectional shape.
  • Welding means 23 comprising a welding machine that welds both side edges of the strip-shaped steel plates that are tubular and abutted to each other to form a continuous tube, a weld bead cutting device and a post-aligner device, and further continuous
  • a post-processing means 24 for reducing the pipe to a required size and a cutting means 25 provided with a traveling cutting machine for cutting the pipe of the required size into a required length are continuously provided.
  • FIG. 14 is a diagram showing an overall configuration of a roll forming line used for manufacturing the reinforced construction material.
  • the roll forming line 26 is an apparatus for forming the strip steel plate 20 into a predetermined shape. Therefore, a strip steel plate 20 as a metal material is wound, an uncoiler 21 that feeds out the strip steel plate 20, and a roll forming machine that forms the strip steel plate 20 fed out by the uncoiler 21 into a predetermined shape.
  • a means 27 and a cutting means 28 provided with a traveling cutting machine for continuously cutting the strip-shaped steel plate 20 formed into a predetermined shape by the roll forming machine into a predetermined length dimension.
  • the bending apparatus of the present invention it is continuously arranged on the exit side of the ERW steel pipe production line 19 or the roll forming line 26, so that the entire process from supplying the workpiece to the bending apparatus is performed.
  • the equipment line can be made compact, and by setting the operating conditions appropriately, it is possible to manufacture bent products with excellent precision efficiently and inexpensively.
  • the bending direction of the metal material is two-dimensionally different (for example, (S-shaped bending) and continuous bending with three-dimensional bending directions are different, and even when higher-strength metal bending is required, the metal material is cooled uniformly. Therefore, a metal material having good shape freezing property and uniform hardness distribution even at high strength can be obtained efficiently and inexpensively.
  • the movable roller die clamps the metal material in a rotatable manner, seizure flaws generated on the surface of the die can be suppressed, so that bending accuracy can be ensured and work efficiency is excellent. Push-through bending is possible. As a result, it can be widely applied as a technology for bending automotive parts that are becoming more sophisticated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

L’invention concerne un traitement de cintrage à mi-fer pour un matériau de métal, consistant, pendant une extrusion séquentielle ou en continu d’un matériau à traiter depuis le côté amont, à réaliser un cintrage de celui-ci du côté aval. Lors du traitement, le matériau de métal est fixé à l’aide de filières à galets mobiles avec contrôle de la position et/ou la vitesse de déplacement des filières à galets mobiles, chauffé dans une fourchette de températures permettant une déformation plastique locale et la trempe grâce à un moyen de chauffage et un moyen de refroidissement disposés à la périphérie du matériau de métal, puis l'on procède à l’application d’un couple de cintrage et d’une trempe. De plus, l'invention porte sur un appareil de traitement de cintrage correspondant et une ligne d’équipement de traitement de cintrage. Même en cas de traitement de cintrage continu, impliquant des directions de cintrage différentes dans deux dimensions, ou bien de cintrage continu impliquant des directions de cintrage différentes dans les trois dimensions, du matériau de métal, et même si l’on exige un traitement de cintrage pour un matériau de métal avec une résistance accrue, un matériau de métal avec une grande fixabilité des formes et une distribution de dureté uniforme peut être obtenu à faible coût. En conséquence, les applications sont nombreuses dans la technologie de cintrage de pièces automobiles toujours plus sophistiquée.
PCT/JP2006/303220 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 Ceased WO2006093006A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP06714360.2A EP1857195B8 (fr) 2005-03-03 2006-02-23 Procédé de traitement de cintrage d'un matériau métallique et produit cintré
CN2006800069674A CN101132869B (zh) 2005-03-03 2006-02-23 金属材料的弯曲加工方法、弯曲加工装置及弯曲加工设备列、以及使用它们做成的弯曲加工产品
US11/896,319 US20080066517A1 (en) 2005-03-03 2007-08-31 Method for bending metal material, bending machine, bending-equipment line, and bent product
US12/718,367 US8919171B2 (en) 2005-03-03 2010-03-05 Method for three-dimensionally bending workpiece and bent product
US12/718,390 US8863565B2 (en) 2005-03-03 2010-03-05 Three-dimensionally bending machine, bending-equipment line, and bent product
US14/485,871 US20150004430A1 (en) 2005-03-03 2014-09-15 Three-dimensionally bending machine, bending equipment line, and bent product
US14/552,799 US20150132600A1 (en) 2005-03-03 2014-11-25 Method for three-dimensionally bending workpiece and bent product

Applications Claiming Priority (4)

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JP2005-059571 2005-03-03
JP2005059571 2005-03-03
JP2005-242441 2005-08-24
JP2005242441 2005-08-24

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US11/896,319 Continuation US20080066517A1 (en) 2005-03-03 2007-08-31 Method for bending metal material, bending machine, bending-equipment line, and bent product

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US (1) US20080066517A1 (fr)
EP (2) EP1857195B8 (fr)
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KR20070102594A (ko) 2007-10-18
EP2511020A2 (fr) 2012-10-17
US20080066517A1 (en) 2008-03-20
EP2511020A3 (fr) 2012-11-14
KR100878647B1 (ko) 2009-01-15
CN101132869A (zh) 2008-02-27
CN101132869B (zh) 2012-10-10
EP1857195A4 (fr) 2011-05-04
EP1857195A1 (fr) 2007-11-21
EP1857195B1 (fr) 2014-04-30

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