WO2010082584A1 - 中空部材、その製造装置および製造方法 - Google Patents
中空部材、その製造装置および製造方法 Download PDFInfo
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- WO2010082584A1 WO2010082584A1 PCT/JP2010/050277 JP2010050277W WO2010082584A1 WO 2010082584 A1 WO2010082584 A1 WO 2010082584A1 JP 2010050277 W JP2010050277 W JP 2010050277W WO 2010082584 A1 WO2010082584 A1 WO 2010082584A1
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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
- B21D15/00—Corrugating tubes
- B21D15/02—Corrugating tubes longitudinally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/155—Making tubes with non circular section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/008—Bending sheet metal along straight lines, e.g. to form simple curves combined with heating or cooling of the bends
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
- B21D5/083—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers for obtaining profiles with changing cross-sectional configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
- B21D5/086—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers for obtaining closed hollow profiles
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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
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- 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
- Y10T428/1241—Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]
Definitions
- the present invention relates to a hollow member, a manufacturing apparatus and a manufacturing method thereof. Specifically, the present invention relates to a lightweight hollow member having high rigidity and excellent impact characteristics, and a manufacturing apparatus and a manufacturing method for the hollow member.
- Metal strength members, reinforcing members or structural members are used for automobiles and various machines. These members are required to have high strength, light weight, and small size. Conventionally, these members have been manufactured by various processing means such as welding of a press-processed product, punching of a thick plate, or forging. However, it is extremely difficult to further reduce the weight or size of the members manufactured by these manufacturing methods. For example, in order to manufacture a welded product by partially overlapping and welding pressed panels, it is necessary to form a surplus portion called a flange on the edge of the pressed panel. The weight of the welded product is inevitably increased by forming a surplus part.
- hydroform In a processing method called hydroform (for example, see Patent Document 1), by introducing a high-pressure processing liquid into a pipe, which is a material arranged in a mold, the outer surface of the pipe follows the inner surface of the mold.
- the tube is formed into a complicated shape by inflating and deforming the tube. Complex shaped parts are integrally formed by hydroforming without the need to form a flange.
- hydrofoam can be used for manufacturing automobile parts because it can reduce the weight of automobile parts.
- Hydroform is a cold process.
- a material having a high strength such as 780 MPa or more lacks ductility when cold. For this reason, it is difficult to form this material into an automotive part having a complicated shape by hydroforming.
- the manufacturing process of hydroform is generally complicated because three processes of bending, preforming and hydroforming are generally required.
- hydroforming machines are large and relatively expensive.
- FIG. 8 is an explanatory view showing an outline of the bending apparatus 0.
- the processing apparatus 0 manufactures a bending member made of the metal material 1 by the procedure listed below.
- the support unit 2 supports the metal material 1 so as to be movable in the axial direction.
- the feed unit 3 feeds the metal material 1 supported by the support unit 2 from the upstream side toward the downstream side, the bending shown in the following (c) section with respect to the metal material 1 downstream of the support unit 2 Processing.
- the induction heating coil 5 disposed downstream of the support unit 2 rapidly heats the metal material 1 to a temperature at which the metal material 1 can be partially quenched.
- a water cooling unit 6 disposed immediately downstream of the induction heating coil 5 rapidly cools the metal material 1.
- the movable roller die 4 has at least one pair of roll pairs 4 a that can be supported while feeding the metal material 1.
- the movable roller die 4 is disposed downstream of the water cooling unit 6.
- the processing device 0 is a simple process using a relatively inexpensive molding machine, and can integrally mold a high-strength automobile part such as 780 MPa or more.
- the processing apparatus 0 is premised on manufacturing a part having a substantially constant cross-sectional shape in the longitudinal direction (axial direction).
- the shape of parts that can be manufactured by the processing apparatus 0 is greatly limited. For this reason, the processing apparatus 0 cannot manufacture a component having a complicated shape such that the cross-sectional shape changes in the axial direction, for example.
- the present invention is a hollow member manufacturing apparatus comprising the following feed unit, support unit, heating unit, cross-sectional shape changing unit, and cooling unit.
- Feed unit a unit having a mechanism for feeding a hollow metal material having a closed cross-sectional shape in the longitudinal direction of the material
- Support unit a unit having a mechanism for supporting the material fed by the feeding unit movably at the first position
- Heating unit a unit having a mechanism for heating the material at a second position downstream of the first position in the material feeding direction
- Cross-sectional shape changing unit a unit having a mechanism for performing processing to change the cross-sectional shape of the material at a third position downstream of the second position in the feed direction of the material, and a cooling unit: more than the third position
- a unit having a mechanism for cooling the material at a fourth position downstream of the material feeding direction.
- the cross-sectional shape changing unit may be arranged so as to be movable in two dimensions or three dimensions, and may be bent into the material by moving in two dimensions or three dimensions.
- the manufacturing apparatus according to the present invention further includes a deformation preventing unit, and the deformation preventing unit prevents the deformation of the material by positioning the material downstream of the fourth position in the material feeding direction. Is desirable.
- the manufacturing apparatus includes a gripping unit supported by, for example, an industrial robot, and the gripping unit grips the material downstream in the material feeding direction from the fourth position. It is desirable that the material is bent in a three-dimensional manner and moved in two or three dimensions.
- the manufacturing apparatus according to the present invention has a gripping unit, it is desirable that the cross-sectional shape changing unit is fixedly arranged without moving.
- the cross-sectional shape changing unit may have a mechanism for cooling the material.
- the deformation preventing unit prevents the deformation of the material by positioning the material downstream of the third position in the material feeding direction.
- the gripping unit grips the material downstream of the third position in the material feeding direction, is disposed so as to be movable two-dimensionally or three-dimensionally, and two-dimensionally or tertiaryly. It is desirable to bend the material by moving it back.
- the present invention supports a material to be fed at a first position while feeding a hollow metal material having a closed cross-sectional shape in the longitudinal direction, and the material is more than the first position.
- the material is heated at the second position downstream in the feed direction, and the cross-sectional shape of the material is changed at the third position downstream in the feed direction of the material from the second position.
- the hollow member manufacturing method is characterized in that the material is cooled at a fourth position downstream of the position in the material feeding direction.
- the material instead of cooling the material at the fourth position, the material may be cooled at the third position.
- two-dimensional or three-dimensional bending is performed on the material between the third position and the fourth position.
- the present invention is a hollow member that is manufactured by the above-described manufacturing method of the present invention and has a hollow metal body that has a closed cross-sectional shape and is configured by one component in the longitudinal direction.
- the main body has at least a first region and a second region in the longitudinal direction, and the cross-sectional shape of the main body in the first region is different from the cross-sectional shape of the main body in the second region.
- a lightweight hollow member having high strength of 780 MPa or more, a complicated shape applicable to automobile parts, high rigidity, and excellent collision characteristics, and a simple hollow member for example, a lightweight hollow member having high strength of 780 MPa or more, a complicated shape applicable to automobile parts, high rigidity, and excellent collision characteristics, and a simple hollow member. It is possible to provide a manufacturing apparatus and a manufacturing method that can be molded in the process and the molding machine is relatively small and inexpensive.
- FIG. 1A and FIG. 1B are both explanatory views schematically showing the configuration of the manufacturing apparatus according to the present invention.
- FIG. 2A and FIG. 2B are explanatory views showing a configuration example of a plurality of forming rolls constituting the cross-sectional shape changing unit.
- FIG. 3 is an explanatory diagram illustrating an example of a material that is desirably used when the molding illustrated in FIG. 2B is performed.
- 4 (a) and 4 (b) are explanatory views showing an outline of control of the forming roll shown in FIG. 2 (a).
- FIG. 5 is an explanatory diagram illustrating an example of a material that is desirably used when the molding illustrated in FIG. 4B is performed.
- FIG. 6B are explanatory diagrams schematically showing a cross-sectional shape changing unit of another example.
- 7 (a) to 7 (c) are explanatory views illustrating the hollow member according to the present invention.
- FIG. 8 is an explanatory diagram showing an outline of the bending apparatus disclosed in Patent Document 1. As shown in FIG.
- 1 (a) and 1 (b) are explanatory diagrams schematically showing the configuration of the manufacturing apparatuses 10 and 10-1 according to the present invention.
- 1A includes a feeding unit 11, a support unit 12, a heating unit 13, a cross-sectional shape changing unit 14, a cooling unit 15, and a deformation preventing unit 16. These components of the manufacturing apparatus 10 will be described sequentially.
- the feed unit 11 is a unit having a mechanism for continuously or intermittently feeding the metal material 20 in the longitudinal direction.
- the metal material 20 is a hollow material having a closed cross-sectional shape. Since it is desirable that the material 20 is made of steel, the following description will be made with an example where the material 20 is made of steel. However, the material 20 is not limited to steel, and the present invention is equally applicable even if the material 20 is made of metal other than steel, such as aluminum alloy.
- the material 20 is exemplified by an ERW steel pipe, a deformed steel pipe obtained by roll forming the ERW steel pipe, or a straight closed cross-section material such as a roll foam material.
- the present invention is not limited to these, and the present invention is applied to a hollow steel product having a closed cross-sectional shape.
- the feed unit 11 may be any conventional unit known to those skilled in the art as this type of feed unit (for example, a ball screw or the like), and thus further description of the feed unit 11 is omitted.
- the support unit 12 is a unit having a mechanism for supporting the material 20 fed by the feed unit 11 so as to be movable at the first position A. Since the support unit 12 may be a conventional unit known to those skilled in the art as this type of support unit, further description of the support unit 12 will be omitted.
- the heating unit 13 is a unit having a mechanism for heating the material 20 at the second position B.
- the heating unit 13 desirably has the ability to rapidly heat the material 20 to, for example, the temperature of Ac 3 or higher of the material 20, and an induction heating device is exemplified.
- the cross-sectional shape changing unit 14 is a unit having a mechanism for performing processing for changing the cross-sectional shape of the material 20 at the third position C.
- the cross-sectional shape changing unit 14 is desirably arranged so as to be movable in three dimensions or two dimensions.
- the cross-sectional shape changing unit 14 includes at least a pair of forming rolls 14a and 14b, and at least the pair of forming rolls 14a and 14b is arranged to be movable in three dimensions or two dimensions while feeding the material 20. It is desirable.
- At least the pair of forming rolls 14a and 14b has a function of rolling down the material 20, and it is desirable to have a mechanism for driving and rotating.
- FIG. 2A and FIG. 2B are explanatory views showing a configuration example of a plurality of forming rolls constituting the cross-sectional shape changing unit 14.
- FIG. 2A shows a case where at least a pair of forming rolls 14 includes a pair of horizontal rolls 14a and 14b and a pair of vertical rolls 14c and 14d.
- FIG. 2 (b) shows a case where at least the pair of forming rolls 14-1 includes a pair of horizontal rolls 14a-1, 14b-1 and a pair of vertical rolls 14c-1, 14d-1.
- the forming rolls 14a to 14d may be straight rolls, and as shown in FIG. 2B, the forming rolls 14a-1 to 14d-1 are deformed rolls such as hole-type rolls. It may be.
- FIG. 3 is an explanatory diagram showing an example of the material 20 that is desirably used when the molding shown in FIG. 2B is performed.
- the vertical bead 20 b be provided on the vertical wall portion 20 a of the material 20 (portion formed by the hole roll). Since the strength of the vertical wall portion 20 is increased by providing the vertical bead 20b, a good product is manufactured.
- FIGS. 4 (a) and 4 (b) are explanatory views showing an outline of control of the forming rolls 14a to 14d shown in FIG. 2 (a).
- FIGS. 4 (a) and 4 (b) it is more desirable that the pair of horizontal rolls 14a to 14d and the pair of vertical rolls 14c and 14d can control the reduction positions independently.
- Fig.14 (a) since the opening degree of the vertical rolls 14c and 14d can be adjusted, adjusting the width of a horizontal direction with the vertical reduction with respect to the raw material 20, the width
- the vertical rolls 14c and 14d can be made constant while the width in the left-right direction is adjusted while the material 20 is pressed down in the vertical direction.
- FIG. 5 is an explanatory diagram showing an example of the material 20 that is desirably used when the molding shown in FIG. 4B is performed. As shown in FIG. 5, at the time of molding shown in FIG. 4B, the recess 20 d is provided on the side surface 20 c of the material 20, so that molding can be performed smoothly.
- At least one of the forming rolls 14a to 14d and 14a-1 to 14d-1 is a perforated roll depending on the degree of change in the cross-sectional shape of the material 20.
- FIG. 6A and FIG. 6B are explanatory diagrams schematically showing a cross-sectional shape changing unit 17 of another example.
- the cross-sectional shape changing unit 17 is configured by a press device including an upper mold 17a and a lower mold 17b.
- This press apparatus is arranged downstream of at least the pair of rolls 14a and 14b in the feed direction of the material 20.
- the cross-sectional shape changing unit 17 is used when at least the pair of rolls 14a and 14b does not have a function of reducing the heated material 20, and has a mechanism for reducing the material 20 heated by the heating unit 13. Have.
- the cross-sectional shape of the raw material 20 is changed by providing the cross-sectional shape changing unit 17 even when at least the pair of rolls 14a and 14b does not have a mechanism for reducing the heated raw material 20.
- this pressing device is arranged, and a cross-sectional shape changing unit is configured by a combination of both the pair of rolls 14a and 14b and the pressing device. You may make it do. Thereby, the degree of change of the cross-sectional shape of the material 20 is increased.
- the cooling unit 15 is a unit having a mechanism for cooling the material 20 at the fourth position D.
- the use of a water cooling device as the cooling unit 15 is exemplified.
- the manufacturing apparatus 10 is an apparatus having the same configuration as the processing apparatus 0 disclosed in Patent Document 1.
- the cross-sectional shape changing unit 14 may also have a mechanism for cooling the material 20.
- the pair of rolls 14 a and 14 b cool the material 20 that has been overheated at the same time while changing the cross-sectional shape of the material 20.
- the deformation prevention unit 16 has a mechanism for preventing the deformation of the material 20 by positioning the formed material 20-1 at the fifth position E downstream of the fourth position D in the feed direction of the material 20. Is a unit.
- the deformation preventing unit 16 may not be installed in the manufacturing apparatus 10.
- the deformation preventing unit 16 is exemplified as a device that supports and guides the tip of the material 20 or a deformation preventing table that is mounted with the material 20 and prevents deformation due to its own weight. .
- a known articulated robot may constitute the deformation prevention unit 16.
- the drawing speed of the formed material 20-1 by appropriately adjusting the feeding speed (operation speed) of this robot, the driving of the pair of rolls 14a, 14b can be omitted or the formed material 20- It is also possible to control the tensile stress or the compressive stress generated in one processed part.
- a gripping unit supported by an industrial robot can be arranged.
- the gripping unit (a) grips the material 20 downstream of the fourth position D in the feed direction of the material 20, (b) is arranged to be movable in two dimensions or three dimensions, and (c).
- the material 20 may be bent by moving in two dimensions or three dimensions.
- the gripping unit performs a bending process on the material 20.
- the cross-sectional shape changing unit 14 is fixedly disposed from the viewpoint of ease of control and prevention of expansion of the operating range of the gripping unit.
- the manufacturing apparatus 10 is configured as described above. Next, a situation where the hollow member is manufactured by the manufacturing apparatus 10 will be described. First, the feeding unit 11 continuously or intermittently feeds a hollow steel material 20 having a closed cross-sectional shape in the longitudinal direction.
- the support unit 12 supports the material 20 fed by the feed unit 11 at the first position A.
- the heating unit 13 rapidly heats the material 20 at the second position B, for example, to more than Ac 3 points.
- the cross-sectional shape changing unit 14 performs processing to change the cross-sectional shape of the material 20 whose deformation resistance has been greatly reduced by rapid heating. Then, the cooling unit 15 rapidly cools the material 20 at the fourth position D.
- the hollow member according to the present invention is manufactured in this way. It is desirable that the deformation preventing unit 16 prevents the deformation of the material 20 by positioning the formed material 20-1 at the fifth position E. Thereby, the fall of the dimensional accuracy of the hollow member manufactured can be suppressed.
- the heated portion of the material 20 is brought into a tensile stress state or It can be in a compressive stress state. For this reason, when wrinkles are likely to occur in the processed material 20, the material 20 is brought into a tensile stress state, and when thickness reduction is a problem, the material 20 is brought into a compressive stress state. The occurrence of defects can also be suppressed.
- the tensile stress is changed from the second position B to the third position. It is given to the material 20 existing up to the position. Thereby, the cross-sectional area of the raw material 20 decreases. Conversely, the compressive stress is applied to the material 20 existing from the second position B to the third position, so that the cross-sectional area of the material 20 increases.
- the heating of the material 20 by the heating unit 13 is performed over the entire length of the material 20 is taken as an example.
- partial heating of the material 20 in the longitudinal direction is possible by using, for example, an induction heating device as the heating unit 13.
- the cross-sectional shape changing unit 14 not only the heated portion but also the unheated portion may be processed by the cross-sectional shape changing unit 14. That is, the material 20 is partially heated in the longitudinal direction at the second position B, and the cross-sectional shape of at least a part of the portion that is not heated at the second position B is changed at the third position C. You may make it perform. According to this, since the non-heated part can be processed in-line without forming the non-heated part by post-processing on a separate line, the process can be shortened and the processing accuracy can be improved.
- FIG. 7 (a) to 7 (c) are explanatory views illustrating the hollow members 22a to 22c according to the present invention.
- FIG. 7A and FIG. 7C show a case where the whole has a straight type outer shape
- FIG. 7C shows a case where the whole has a type outer shape bent with a large curvature.
- the hollow members 22a to 22c include hollow steel main bodies 23a to 23c. All of the main bodies 23a to 23c have a closed cross-sectional shape and are integrally configured by one component in the longitudinal direction.
- Each of the main bodies 23a to 23c has at least a first region 24 and a second region 25 in the longitudinal direction.
- the cross sectional shapes of the main bodies 23a to 23c in the first region 24 are different from the cross sectional shapes of the main bodies 23a to 23c in the second region 25.
- the hollow members 22a to 22c have a very high strength that is not obtained by the hydroform disclosed in Non-Patent Document 1, for example, all or part of the longitudinal direction is 780 MPa or more.
- the hollow member 22 is applicable to, for example, uses (i) to (vii) exemplified below.
- Automotive strength members such as lower arms and brake pedals of automobile suspensions;
- Reinforcing members such as various types of automobile reinforcements and braces,
- Automotive structural members such as bumpers, door impact beams, side members, suspension mount members, pillars, side sills,
- Reinforcing members for vehicles such as trains, cart parts (cart frames, various beams, etc.)
- Vi) Frame parts such as hulls, reinforcing members,
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
加工装置0は、以下に列記する手順で、金属材1を素材とする屈曲部材を製造する。
(b)送りユニット3が、支持ユニット2により支持された金属材1を上流側から下流側へ向けて送りながら、支持ユニット2の下流で金属材1に対して下記(c)項により示す曲げ加工を行う。
送りユニット:閉じた横断面形状を有する中空の金属製の素材をこの素材の長手方向へ送る機構を有するユニット、
支持ユニット:この送りユニットにより送られる素材を、第1の位置において移動自在に支持する機構を有するユニット、
加熱ユニット:第1の位置よりも素材の送り方向の下流の第2の位置において素材を加熱する機構を有するユニット、
横断面形状変更ユニット:第2の位置よりも素材の送り方向の下流の第3の位置において素材の横断面形状を変更する加工を行う機構を有するユニット、および
冷却ユニット:第3の位置よりも素材の送り方向の下流の第4の位置において素材を冷却する機構を有するユニット。
本発明に係る製造方法では、第3の位置から第4の位置の間において、素材に二次元または三次元の曲げ加工を行うことが例示される。
11 送りユニット
12 支持ユニット
13 加熱ユニット
14 横断面形状変更ユニット
14a~14d,14a-1~14d-1b 成形ロール
15、15’、15’ ’ 冷却ユニット
16 変形防止ユニット
17 プレス装置
17a 上金型
17b 下金型
20 素材
20b 縦ビード
20c 側面
20a 縦壁部
20d 凹み
20-1 成形された素材
22、22a~22c 中空部材
23a~23c 本体
24 第1の領域
25 第2の領域
A 第1の位置
B 第2の位置
C 第3の位置
D 第4の位置
E 第5の位置
図1(a)および図1(b)は、いずれも、本発明に係る製造装置10、10-1の構成を模式的に示す説明図である。
送りユニット11は、金属製の素材20をその長手方向へ連続的または断続的に送る機構を有するユニットである。金属製の素材20は、閉じた横断面形状を有する中空の素材である。素材20は、鋼製であることが望ましいため、以降の説明は、素材20が鋼製である場合を例にとって行う。しかし、素材20は、鋼製に限定されるものではなく、例えばアルミニウム合金製等の鋼製以外の金属製であっても、本発明は等しく適用される。
支持ユニット12は、送りユニット11により送られる素材20を、第1の位置Aにおいて移動自在に支持する機構を有するユニットである。支持ユニット12は、この種の支持ユニットとして当業者にとって周知慣用のものであればよいので、支持ユニット12に関するこれ以上の説明は省略する。
加熱ユニット13は、第2の位置Bで素材20を加熱する機構を有するユニットである。加熱ユニット13は、素材20を、例えば素材20のAc3点以上の温度に急速に加熱する能力を有することが望ましく、誘導加熱装置を用いることが例示される。
横断面形状変更ユニット14は、第3の位置Cにおいて、素材20の横断面形状を変更する加工を行う機構を有するユニットである。
図2(a)は、少なくとも一対の成形ロール14が、一対の水平ロール14a、14bおよび一対の垂直ロール14c、14dからなる場合である。図2(b)は、少なくとも一対の成形ロール14-1が、一対の水平ロール14a-1、14b-1および一対の垂直ロール14c-1、14d-1からなる場合である。
図3に示すように、図2(b)に示す成形を行う場合には、縦ビード20bが素材20の縦壁部20a(孔型ロールにより成形される部分)に設けられることが望ましい。縦壁部20の強度が縦ビード20bを設けられることによって増加するため、良好な製品が製造される。
図4(a)および図4(b)に示すように、一対の水平ロール14a~14dと一対の垂直ロール14c,14dとは、圧下位置を独立して制御可能であることがさらに望ましい。図14(a)に示すように、素材20に対する上下方向の圧下とともに左右方向の幅調整を行いながら垂直ロール14c,14dの開度を調整できるので、製品の幅を変化させることができる。また、図4(b)に示すように、素材20に対する上下方向の圧下とともに左右方向の幅調整を行いながら垂直ロール14c,14dの開度を一定とすることもできる。
図5に示すように、図4(b)に示す成形時には、凹み20dが素材20の側面20cに設けられることによって、スムーズに成形を行うことができる。
同図に示すように、横断面形状変更ユニット17は、上金型17aおよび下金型17bからなるプレス装置により構成される。このプレス装置は、少なくとも一対のロール14a、14bよりも素材20の送り方向の下流に配置される。横断面形状変更ユニット17は、少なくとも一対のロール14a、14bが加熱された素材20を圧下する機能を有さない場合に用いるものであり、加熱ユニット13により加熱された素材20を圧下する機構を有する。
[冷却ユニット15]
冷却ユニット15は、第4の位置Dにおいて、素材20を冷却する機構を有するユニットである。冷却ユニット15として水冷装置を用いることが例示される。
変形防止ユニット16は、第4の位置Dよりも素材20の送り方向の下流の第5の位置Eにおいて、成形された素材20-1を位置決めすることによって素材20の変形を防止する機構を有するユニットである。変形防止ユニット16は、製造装置10に設置しなくてもよい。
把持ユニットは、(a)第4の位置Dよりも素材20の送り方向の下流において素材20を把持すること、(b)二次元または三次元に移動自在に配置されること、および(c)二次元または三次元に移動することによって素材20に曲げ加工を行うこととしてもよい。製造装置10が把持ユニットを有する場合には、把持ユニットが素材20に対する曲げ加工を行う。このため、横断面形状変更ユニット14は固定配置されることが、制御の容易性や把持ユニットの動作範囲の拡大防止の観点から、望ましい。
はじめに、送りユニット11は、閉じた横断面形状を有する中空の鋼製の素材20をその長手方向へ連続的または断続的に送る。
加熱ユニット13は、第2の位置Bで素材20を急速に、例えばAc3点以上に急速に加熱する。
そして、冷却ユニット15は、第4の位置Dにおいて素材20を急速に冷却する。
変形防止ユニット16が、成形された素材20-1を第5の位置Eにおいて位置決めすることによって素材20の変形を防止することが望ましい。これにより、製造される中空部材の寸法精度の低下を抑制することができる。
以上の説明は、加熱ユニット13による素材20の加熱が、素材20の全長にわたって行われる場合を例にとった。しかし、素材20の長手方向への部分的な加熱が、加熱ユニット13として例えば誘導加熱装置を用いることによって、可能になる。この場合、加熱された部分のみならず、加熱されていない部分を横断面形状変更ユニット14により加工するようにしてもよい。すなわち、第2の位置Bにおいて素材20を、その長手方向について部分的に加熱し、第2の位置Bにおいて加熱されない部分の少なくとも一部の横断面形状を第3の位置Cにおいて変更する加工を行うようにしてもよい。これによれば、非加熱部を別ラインで後加工により成形することなく、インラインで非加熱部を加工することができるので、工程短縮および加工精度向上を図ることができる。
(i)自動車のサスペンションのロアーアームやブレーキペダルといった自動車の強度部材、
(ii)自動車の各種レインフォース、ブレース等の補強部材、
(iii)バンパー、ドアインパクトビーム、サイドメンバー、サスペンションマウントメンバー、ピラー、サイドシル等の自動車の構造部材、
(iv)自転車や自動二輪車等のフレーム、クランク
(v)電車等の車輛の補強部材、台車部品(台車枠、各種梁等)
(vi)船体等のフレーム部品、補強部材、
(vii)家電製品の強度部材、補強部材または構造部材
Claims (16)
- 下記の送りユニット、支持ユニット、加熱ユニット、横断面形状変更ユニットおよび冷却ユニットを備えることを特徴とする中空部材の製造装置;
送りユニット:閉じた横断面形状を有する中空の金属製の素材を該素材の長手方向へ送る機構を有するユニット、
支持ユニット:該送りユニットにより送られる前記素材を、第1の位置において移動自在に支持する機構を有するユニット、
加熱ユニット:前記第1の位置よりも前記素材の送り方向の下流の第2の位置において前記素材を加熱する機構を有するユニット、
横断面形状変更ユニット:前記第2の位置よりも前記素材の送り方向の下流の第3の位置において前記素材の横断面形状を変更する加工を行う機構を有するユニット、および
冷却ユニット:前記第3の位置よりも前記素材の送り方向の下流の第4の位置において前記素材を冷却する機構を有するユニット。 - 下記の送りユニット、支持ユニット、加熱ユニットおよび横断面形状変更ユニットを備えることを特徴とする中空部材の製造装置;
送りユニット:閉じた横断面形状を有する中空の金属製の素材を該素材の長手方向へ送る機構を有するユニット、
支持ユニット:該送りユニットにより送られる前記素材を、第1の位置において移動自在に支持する機構を有するユニット、
加熱ユニット:前記第1の位置よりも前記素材の送り方向の下流の第2の位置において前記素材を加熱する機構を有するユニット、および
前記横断面形状変更ユニット:前記第2の位置よりも前記素材の送り方向の下流の第3の位置において、前記素材の横断面形状を変更する加工を行うとともに該素材を冷却する機構を有するユニット。 - 前記横断面形状変更ユニットは、二次元または三次元に移動自在に配置される機構を含むこと、かつ該機構は、二次元または三次元に移動することによって前記素材に曲げ加工を行うことを特徴とする請求項1または請求項2に記載された中空部材の製造装置。
- 前記機構は、前記素材を送りながら三次元に移動自在に配置される少なくとも一対のロールを備えること、かつ該少なくとも一対のロールは、前記素材を圧下することを特徴とする請求項3に記載された中空部材の製造装置。
- 前記少なくとも一対のロールのうちの少なくとも一のロールは、駆動回転することを特徴とする請求項4に記載された中空部材の製造装置。
- 把持ユニットを備え、該把持ユニットは、前記第4の位置よりも前記素材の送り方向の下流において前記素材を把持する機構を有すること、該機構は、二次元または三次元に移動自在に配置されること、かつ、該機構は、二次元または三次元に移動することによって前記素材に曲げ加工を行うことを特徴とする請求項1に記載された中空部材の製造装置。
- 把持ユニットを備え、該把持ユニットは、前記第3の位置よりも前記素材の送り方向の下流において前記素材を把持する機構を有すること、該機構は、二次元または三次元に移動自在に配置されること、および、該機構は、二次元または三次元に移動することによって前記素材に曲げ加工を行うことを特徴とする請求項2に記載された中空部材の製造装置。
- 前記横断面形状変更ユニットは固定配置される請求項6または請求項7に記載された中空部材の製造装置。
- 前記横断面形状変更ユニットは、前記素材を送りながら固定配置される少なくとも一対のロールを備える機構を有すること、および該少なくとも一対のロールは、前記素材を圧下することを特徴とする請求項8に記載された中空部材の製造装置。
- 前記少なくとも一対のロールのうちの少なくとも一のロールは、駆動回転することを特徴とする請求項9に記載された中空部材の製造装置。
- 閉じた横断面形状を有する中空の金属製の素材を該素材の長手方向へ送りながら、送られる該素材を第1の位置において支持し、該第1の位置よりも前記素材の送り方向の下流の第2の位置において前記素材を加熱し、該第2の位置よりも前記素材の送り方向の下流の第3の位置において前記素材の横断面形状を変更する加工を行い、さらに、前記第3の位置よりも前記素材の送り方向の下流の第4の位置において前記素材を冷却することを特徴とする中空部材の製造方法。
- 閉じた横断面形状を有する中空の金属製の素材を該素材の長手方向へ送りながら、送られる該素材を第1の位置において支持し、該第1の位置よりも前記素材の送り方向の下流の第2の位置において前記素材を加熱し、該第2の位置よりも前記素材の送り方向の下流の第3の位置において、前記素材の横断面形状を変更する加工を行うとともに該素材を冷却することを特徴とする中空部材の製造方法。
- 前記第1の位置の入側における前記素材の送り速度および/または前記第3の位置における前記素材の通過速度を変更することによって、前記第2の位置から前記第3の位置までに存在する前記素材に、引張力あるいは圧縮力を付与する請求項11または請求項12に記載された中空部材の製造方法。
- 前記第2の位置において前記素材を、該素材の長手方向について部分的に加熱し、前記第3の位置において、該素材における加熱しない部分の少なくとも一部の横断面形状を変更する加工を行う請求項11または請求項12に記載された中空部材の製造方法。
- 前記第2の位置において前記素材を、該素材の長手方向について部分的に加熱し、前記第3の位置において、該素材における加熱しない部分の少なくとも一部の横断面形状を変更する加工を行う請求項13に記載された中空部材の製造方法。
- 請求項11または請求項12に記載された製造方法により製造され、閉じた横断面形状を有するとともに長手方向に一つの部品により構成される中空の金属製の本体を備える中空部材であって、該本体は長手方向に少なくとも第1の領域および第2の領域を有すること、および、該第1の領域における該本体の横断面形状は、前記第2の領域における該本体の横断面形状と相違することを特徴とする中空部材。
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- 2010-01-13 KR KR1020117018892A patent/KR20110105397A/ko not_active Application Discontinuation
- 2010-01-13 JP JP2010546631A patent/JP5510336B2/ja active Active
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- 2010-01-13 WO PCT/JP2010/050277 patent/WO2010082584A1/ja active Application Filing
- 2010-01-13 BR BRPI1006839A patent/BRPI1006839A2/pt not_active Application Discontinuation
- 2010-01-13 CN CN201080011902.5A patent/CN102348517B/zh not_active Expired - Fee Related
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- 2010-01-13 AU AU2010205260A patent/AU2010205260B2/en not_active Ceased
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JP2015506873A (ja) * | 2012-02-01 | 2015-03-05 | マグナ インターナショナル インコーポレイテッド | 横方向ストラット及び横方向ストラットを形成する方法 |
US9415432B2 (en) | 2012-11-19 | 2016-08-16 | Aisin Seiki Kabushiki Kaisha | Roll forming method and roll forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
KR101373961B1 (ko) | 2014-03-12 |
EA201170928A1 (ru) | 2012-02-28 |
CN102348517B (zh) | 2014-01-08 |
JP2014087846A (ja) | 2014-05-15 |
JP5786927B2 (ja) | 2015-09-30 |
ZA201105708B (en) | 2012-04-25 |
JP5510336B2 (ja) | 2014-06-04 |
MX2011007474A (es) | 2011-10-24 |
US20120003496A1 (en) | 2012-01-05 |
EP2399685A1 (en) | 2011-12-28 |
CA2749686C (en) | 2013-10-01 |
AU2010205260B2 (en) | 2013-09-05 |
JPWO2010082584A1 (ja) | 2012-07-05 |
KR20110105397A (ko) | 2011-09-26 |
CN102348517A (zh) | 2012-02-08 |
EA021208B1 (ru) | 2015-04-30 |
US8833127B2 (en) | 2014-09-16 |
CA2749686A1 (en) | 2010-07-22 |
EP2399685A4 (en) | 2015-12-23 |
AU2010205260A1 (en) | 2011-08-04 |
BRPI1006839A2 (pt) | 2016-04-12 |
KR20130090422A (ko) | 2013-08-13 |
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