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WO2011125968A1 - Procédé de fabrication de jante de roue pour véhicule - Google Patents

Procédé de fabrication de jante de roue pour véhicule Download PDF

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Publication number
WO2011125968A1
WO2011125968A1 PCT/JP2011/058499 JP2011058499W WO2011125968A1 WO 2011125968 A1 WO2011125968 A1 WO 2011125968A1 JP 2011058499 W JP2011058499 W JP 2011058499W WO 2011125968 A1 WO2011125968 A1 WO 2011125968A1
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WO
WIPO (PCT)
Prior art keywords
flat plate
die
plate material
punch
wheel rim
Prior art date
Application number
PCT/JP2011/058499
Other languages
English (en)
Japanese (ja)
Inventor
喜四郎 阿部
貴光 高野
勝機 加藤
謙治 田口
Original Assignee
トピー工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by トピー工業株式会社 filed Critical トピー工業株式会社
Priority to JP2012509647A priority Critical patent/JP5749708B2/ja
Publication of WO2011125968A1 publication Critical patent/WO2011125968A1/fr

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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
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/30—Making other particular articles wheels or the like wheel rims
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/38—Making machine elements wheels; discs rims; tyres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K23/00—Making other articles

Definitions

  • the present invention relates to a method for manufacturing a wheel rim for a vehicle, and more particularly to a method for manufacturing a wheel rim for a vehicle that manufactures an unequal thickness vehicle wheel rim from a flat plate material.
  • Patent Documents 1 and 2 disclose an example of an unequal thickness vehicle wheel rim manufactured from a flat material.
  • the unequal thickness is obtained from a flat plate material using a rolling device in which a plurality of stages of a pair of rolls including a pressure roll and a rolling roll are arranged.
  • a flat plate member is produced, the flat plate member of unequal thickness is wound in a cylindrical shape, the ends are welded to form a cylindrical member of unequal thickness, and the cylindrical member of unequal thickness is roll-formed.
  • a vehicle wheel rim shape is produced, and an unequal thickness vehicle wheel rim is manufactured.
  • Patent Document 1 Since a rolling device having a plurality of stages of a pair of rolls composed of a pressure roll and a rolling roll is used, the equipment is large and expensive.
  • Patent Document 2 Flow forming requires expensive equipment. In flow forming, the roll that presses the cylindrical material against the mandrel must be moved in two directions, the material axis direction and the material thickness direction, so that the punch feed direction can be one direction. The equipment is several times more expensive than the equipment.
  • An object of the present invention is a vehicle wheel rim of unequal thickness that can be made unequal with a flat plate material at a lower cost than the prior art and without using unequal thickness with a rolling device and flow forming. It is to provide a manufacturing method.
  • the present invention for achieving the above object is as follows. (1) Using an ironing device provided with a punch and a die having an uneven surface on the side facing the punch, ironing is performed on a flat plate material to produce an uneven thickness plate member. Having a process, In the ironing step, the flat material is set on the die, the ironing device is operated to move the punch relative to the die, and the flat material is formed by the uneven surface of the die and the punch. A method for manufacturing a wheel rim for a vehicle, wherein the plate-shaped material is ironed to produce the unequal-thickness plate-like member while changing the plate thickness.
  • a flange portion that bends one end portion of the flat plate material in one direction to form a bent portion and a flange portion of the flat plate material on the tip side from the bent portion in the flat plate material.
  • the flat plate material is hooked on the die at the flange portion of the flat plate material, and then a pressing member assembled to the ironing device is moved relative to the die to form the flat plate material.
  • the flange portion of the flat plate material is clamped by the pressing member and the die, and then at least a part of the flat plate material other than the flange portion of the flat plate material is squeezed by moving the punch relative to the die.
  • the concave-convex surface is a direction perpendicular to the moving direction of the punch relative to the die, and the distance between the die and the punch is set on the side surface of the die facing the punch.
  • the flange portion of the flat plate material is bent at one or more locations in the one-way intermediate portion of the flat plate material.
  • the conventional non-uniform thickness is reduced by a rolling device and flow forming. Without using it, the flat plate material can be made unequal.
  • the conventional equipment for the compaction device and flow forming is replaced with the ironing die and punch in the present invention, and the ironing die compared to the equipment cost of the compaction device and flow forming, Since the total cost of the punch and the ironing device is low, the equipment cost can be reduced as compared with the prior art, and the vehicle wheel rim can be manufactured at a lower cost and with an unequal thickness.
  • a conventional press can be used for one-way stroke movement of the punch die. As a result, the molding time can be shortened and the cost of the molding equipment can be reduced.
  • the flat plate material is dragged by the die by hooking the flange portion of the flat plate material to the die in the ironing process. Movement with respect to the die is suppressed, and high-precision molding becomes possible. Further, in the ironing process, since the flange portion of the flat plate material is clamped by the pressing member and the die, and at least a part of the flat plate material other than the flange portion of the flat plate material is ironed, the flat plate shape Compared to the case where the flange portion of the material is not clamped between the pressing member and the die, the flat plate material is further restrained from being dragged by the punch and moving relative to the die during molding.
  • the concavo-convex surface is provided with at least one convex portion on the die that makes the space between the die and the punch narrower than the plate thickness of the flat plate material. Therefore, it is possible to produce a flat plate member whose thickness changes.
  • one or more intermediate bent portions are formed in the flange portion of the flat plate material.
  • the deformation resistance of the flange portion of the flat plate material is increased compared to the case where the intermediate bent portion is not formed in the flange portion of the flat plate material, and the flat plate material is further dragged by the punch and moves relative to the die during molding. It is suppressed.
  • the vehicle wheel rim manufacturing method of (6) above since at least one folding direction of the intermediate folding portion and the folding direction of the folding portion are opposite to each other, all the folding directions and the folding portions of the intermediate folding portion are provided. Unlike the case where the bending direction is the same, the flange portion of the flat plate material on the distal end side is caught by the pressing member from the intermediate bending portion where the bending direction is opposite to the bending direction of the bent portion. Therefore, compared to the case where all the folding directions of the intermediate folding portion and the folding direction of the folding portion are the same, the flat plate material is further restrained from being dragged by the punch and moving relative to the die during molding. Is done.
  • the flat plate material in the ironing process, is ironed while pressing the front end of the punch with respect to the die with the discharge plate. Sometimes, it is suppressed that the flat plate material is dragged by the punch and moves relative to the die during molding.
  • an unequal thickness flat plate member is wound into a cylindrical shape and both ends of the winding are butted and welded to form an unequal thickness cylindrical shape. Since it has the cylindrical member formation process which produces a member, an unequal thickness cylindrical member can be produced.
  • Example 2 of the present invention can also be applied to Example 2 of the present invention by setting a die having an uneven surface instead of a backup to receive the squeezing force so that the flat plate material can be squeezed on both sides of the punch.
  • It is an expanded partial sectional view which shows only a discharge plate and its vicinity in case the discharge plate is provided of the manufacturing method of the wheel rim for vehicles of Example 1 of this invention.
  • this figure is also applicable to the second embodiment of the present invention.
  • the expanded fragmentary sectional view which shows only the flange part of a flat material, and its vicinity in the case of the intermediate bending part being formed in the flange part of the flat material of the manufacturing method of the wheel rim for vehicles of Example 1 of this invention. It is.
  • FIG. 1 to 7 are applicable to the first embodiment of the present invention
  • FIG. 8 is applicable to the second embodiment of the present invention.
  • FIG. 1 to FIG. 3, FIG. 5 and FIG. 6 are also applicable to the second embodiment of the present invention.
  • FIG. 4 shows a die having an uneven surface in place of a backup receiving a squeezing force. It is applicable also to Example 2 of this invention by enabling it to iron a flat material on both sides of this. Portions common to all the embodiments of the present invention are denoted by the same reference numerals throughout the embodiments of the present invention.
  • the vehicle wheel rim 10C according to the present invention is a method of manufacturing a vehicle wheel rim 10C having an unequal thickness from the flat plate material 2 as shown in FIGS.
  • the material of the flat material 2 is a metal, and the metal is, for example, steel, non-ferrous metal (including aluminum, magnesium, titanium, and an alloy thereof).
  • the vehicle wheel rim 10 ⁇ / b> C is formed as a flat plate member 10 ⁇ / b> A having an unequal thickness in which one surface of the front and back surfaces is formed as an uneven surface by ironing the flat plate material 2.
  • FIG. 1 The material of the flat material 2 is a metal, and the metal is, for example, steel, non-ferrous metal (including aluminum, magnesium, titanium, and an alloy thereof).
  • the vehicle wheel rim 10 ⁇ / b> C is formed as a flat plate member 10 ⁇ / b> A having an unequal thickness in which one surface of the front and back surfaces is formed as an uneven surface by ironing the flat plate material 2.
  • the unequal thickness flat plate member 10A is wound to form an unequal thickness cylindrical member 10B having a straight wall parallel to the axis, and as shown in FIG.
  • the member 10C is a member 10C having a wall that is further roll-formed to bend in the direction perpendicular to the axis.
  • the unequal thickness tubular member 10B is, for example, a straight cylindrical unequal thickness tubular member
  • the unequal thickness vehicle wheel rim 10C is, for example, a wheel rim for passenger cars, trucks / buses, and industrial vehicles. is there.
  • the manufacturing method of the vehicle wheel rim 10C of the present invention includes a flat plate material manufacturing step for manufacturing the flat plate material 2 shown in FIG. 1 (a), and as shown in FIG. 1 (c) and FIGS.
  • the flat plate material 2 is ironed to obtain a flat plate member 10A having an unequal thickness. An ironing process to be produced.
  • the flat plate material (rectangular material) 2 is obtained by, for example, drawing a belt-shaped member 2a linearly from a belt-shaped member 2a wound in a coil shape. It is produced sequentially by cutting every dimension length.
  • the flat plate material 2 may be produced by cutting a flat plate material having an area larger than that of the flat plate material 2 into a required size.
  • the belt-like member 2a is drawn out linearly from the belt-like member 2a having a constant thickness wound in a coil shape, and ironing is performed without cutting, and the plate is cut to the length of one member to obtain an unequal thickness flat plate.
  • the shape member 10A may be used.
  • the flat plate-like material 2 may be configured only by walls that are entirely on the same plane, or, as shown in FIG.
  • One end of the flat material 2 is bent in the lengthwise direction of the unequal thickness tubular member 10B when it is formed into the unequal thickness tubular member 10B (hereinafter referred to as the ⁇ direction).
  • the bent portion 8 and the flange portion 9 of the flat plate material on the tip side from the bent portion 8 may be formed.
  • the length of the flange 9 of the flat plate material is preferably 6.5 to 17 times the thickness of the flat plate material 2. Further, it is desirable that the magnification is 7 to 13 times.
  • the thickness of the flat plate material 2 is desirably about 2.0 mm to 8.0 mm.
  • the thickness of the flat plate-like material 2 is not limited to the above range and can be arbitrarily set. There is no particular limitation on the size of the flat plate material 2.
  • the flat plate material 2 is formed into a non-uniform thickness plate member 10A by a squeezing process, and the non-uniform thickness plate member 10A is formed into a non-uniform thickness cylindrical member 10B by a cylindrical member forming step.
  • the axial length of the tubular member 10B is desirably 76 mm to 265 mm. Furthermore, it is desirable that the thickness is 150 mm to 230 mm. The outer diameter of the unequal thickness tubular member 10B is preferably 177 mm to 600 mm. Further, it is desirable that the thickness is 280 mm to 580 mm.
  • the flat plate material 2 has a shape that can be hooked on the die 22 corresponding to the flange portion 9 of the flat plate material from the beginning, the flange portion forming step is unnecessary.
  • the flat plate material 2 has a bent portion 8 and a flange portion 9 of the flat plate material will be described.
  • the bent portion 8 and the flange portion 9 of the flat plate material are formed in the flange portion forming step before the ironing step.
  • the bent portion 8 is a bent portion (curved portion) in which the flat plate material 2 is bent (curved) at an angle of 90 degrees or less or 90 degrees or more.
  • the flange portion 9 of the flat plate material is positioned by hooking the flat plate material 2 to the die 22 by the flange portion 9 of the flat plate material in the ironing process, and the flat plate material 2 is displaced with respect to the die 22 during the ironing process. Helps not to be.
  • the bent portion 8 and the flange portion 9 of the flat plate material are formed, for example, by sandwiching and deforming the flat plate material 2 with a pair of molds 52a and 52b.
  • one or more intermediate bent portions 9a may be formed in the flange portion 9 of the flat plate material.
  • FIG. 6 shows a case where only one intermediate bent portion 9a is formed on the flange portion 9 of the flat plate material.
  • the intermediate bent portion 9a is formed by bending (curving) an intermediate portion in the ⁇ direction of the flange portion 9 made of a flat plate material at an angle of 1 to 90 degrees.
  • the intermediate bent portion 9a is formed in the clamping step of the flange portion forming step and / or the ironing step.
  • the intermediate bent portion 9a may be formed only in the flange portion forming step, may be formed only in the pressing step of the ironing step, or formed in both the flange portion forming step and the pressing step of the ironing step. May be.
  • the intermediate bent portion 9a is a flange portion of the flat plate material by a force for pressing the flange portion 9 of the flat plate material by the pressing member 23 and the die 22. 9 is deformed.
  • at least one bending direction of the intermediate bending portion 9a and the bending direction of the bending portion 8 are opposite to each other, but they may be bent in the same direction.
  • the intermediate bent portion 9a When the bending angle of the bent portion 8 is large or when the force required for ironing is small, the intermediate bent portion 9a may be omitted.
  • the bending angle of the bent portion 8 and the intermediate bent portion 9a may be 90 degrees or more, but the processing becomes difficult in the step of returning the flange portion of the unequal thickness flat plate member 10A after the ironing step. Or the amount of processing increases. Even if the bending angle at the intermediate bent portion 9a and the bent portion 8 is relatively small (less than 90 degrees) by forming the intermediate bent portion 9a, the flat plate material 2 is dragged by the punch 26 in the ironing process. It becomes easy to carry out cylindrical member shaping
  • the flat plate material 2 (the flat plate material 2 having the bent portion 8 and the flange portion 9 of the flat plate material) is hung on the die 22 by the flange portion 9 of the flat plate material and set on the die 22. Thereafter, the ironing device 20 is operated to move the punch 26 relative to the die 22.
  • the pressing member 23 and the punch 26 are moved relative to the die 22 in the ⁇ direction of the flat plate material 2 (approached), the flat plate material 2 of the flat plate material 2 set on the die 22 is formed.
  • the pressing member 23 and the die 22 are pressed against the flange portion 9 to press the flange portion 9 of the flat plate material (the pressing member 23 presses the flat plate material flange portion 9 against the die 22), and the pressing member 23 stops.
  • the punch 26 is further moved (approached) only in the ⁇ direction of the flat plate material 2 with respect to the die 22, and the portions other than the flange portion 9 of the flat plate material 2 of the flat plate material 2 are punched with the uneven surface 24 of the die 22.
  • the flat plate material 2 is ironed while changing the plate thickness of the flat plate material 2 according to No. 26 to produce a flat plate member 10A having an unequal thickness. By ironing, the hardness is increased by work hardening and the accompanying resistance and fatigue strength are improved.
  • the ironing ratio ⁇ (plate thickness before processing ⁇ plate thickness after processing) / plate thickness before processing ⁇ 100 ⁇ is desirably 60% or less.
  • the ironing device 20 includes a press machine 30 as shown in FIG.
  • the press machine 30 includes a gantry 32, a ram driving unit 34 attached to the gantry 32, a ram 36 that is moved up and down by the ram driving unit 34, a bolster 38, and a discharge plate driving unit 42 that moves the discharge plate 40 up and down.
  • the press machine 30 is assembled with the die 22, the punch 26, the pressing member 23, and the discharge plate 40.
  • the die 22 is fixed to the bolster 38 or a member fixed to the bolster 38.
  • the punch 26 is fixed to the ram 36 or a member fixed to the ram 36.
  • the pressing member 23 is attached to the ram 36 or a member fixed to the ram 36 so as to be movable up and down.
  • the discharge plate 40 is fixed to the bolster 38 or a member fixed to the bolster 38, and is attached to the discharge plate driving means 42 so as to be vertically driven.
  • an inclined portion or stepped portion 22 d is formed to catch the flange portion 9 of the flat plate material 2 of the flat plate material 2.
  • the flat plate material 2 is set on the die 22 by bringing the flange portion 9 of the flat plate material into contact with the inclined portion or the stepped portion 22d and hooking it.
  • the pressing member 23 and the punch 26 are moved relative to the die 22 (down, approach).
  • the pressing member 23 hits the flange portion 9 of the flat plate material 2 set on the die 22, and the step portion 22 d between the pressing member 23 and the die 22.
  • the flange portion 9 of the flat plate material is clamped (the flange portion 9 of the flat plate material is pressed against the stepped portion 22d of the die 22 by the pressing member 23), and the pressing member 23 stops.
  • the punch 26 further moves relative to the die 22, and changes the plate thickness of the flat plate material 2 due to the uneven surface 24 of the die 22 and the punch 26 except for the flange portion 9 of the flat plate material 2 of the flat plate material 2. Accompanied by the ironing process. When the flat plate material 2 is ironed, the length of the flat plate material 2 in the ⁇ direction gradually increases (extends) in the direction in which the punch 26 moves relative to the die 22.
  • the discharge plate 40 moves the flat plate material 2 in the direction opposite to the moving direction of the punch 26 with respect to the die 22. You may push (support). In this case, the flat plate-shaped material 2 is ironed while the front end (lower end) of the punch 26 in the moving direction with respect to the die 22 is pressed by the discharge plate 40.
  • the discharge plate 40 When the flat plate material 2 is ironed, the length of the flat plate material 2 in the ⁇ direction gradually increases (extends) in the direction in which the punch 26 moves relative to the die 22, but the discharge plate The position 40 is controlled by the discharge plate driving means 42, and the discharge plate 40 is retracted with the change in the length of the flat plate material 2, and the discharge plate 40 is a flat plate material 2 with a constant load or a substantially constant load. It is possible to continue pressing during ironing.
  • the movement of the discharge plate 40 may control the load acting on the discharge plate 40 or may control the amount of displacement in the ⁇ direction. Further, by holding the discharge plate 40 firmly at a predetermined position, the change in the length of the flat plate material 2 in the ⁇ direction can be restrained, and the length in the ⁇ direction can be kept constant.
  • the side surface of the die 22 on the side facing the protruding portion 28 of the punch 26 is an uneven surface 24.
  • the concavo-convex surface 24 is a surface in which the distance between the protrusions 28 of the punch 26 (the distance in the thickness direction of the flat plate-like material 2) is not uniform and has different portions.
  • the concave / convex surface 24 of the die 22 is formed as shown in FIG. 5 in order to make the distance between the side surface facing the protrusion 28 of the punch 26 and the protrusion 28 of the punch 26 smaller than the plate thickness of the flat plate material 2.
  • the protruding amount of the convex portion 24a is determined by the target plate thickness of each part of the unequal thickness flat plate member 10A, and may be constant or different in one convex portion 24a.
  • the protruding amount of each protruding portion 24a is determined by the target plate thickness of each portion of the unequal thickness flat plate member 10A, and the protruding amount of each protruding portion 24a is the same. Or may be different.
  • the convex portion 24 a only needs to be formed on at least a part of the side surface of the die 22 on the side facing the punch 26.
  • the punch 26 has a protrusion 28 that protrudes toward the die 22 in the vicinity of the tip when moved toward the die 22, and the flat material 2 is squeezed by the protrusion 28.
  • the thick portion (the portion where the plate thickness is not thinned) of the unequal thickness flat plate member 10A is a portion where a large load (load, force) is generated (bending portion, rim flange) when used as the vehicle wheel rim 10C.
  • the thin-walled portion (the portion where the plate thickness is reduced) in the unequal thickness flat plate member 10A is a portion where a small load (load, force) is generated when used as the vehicle wheel rim 10C. (Parts other than the bent part and the flange part of the rim).
  • the cylindrical member forming step is easily performed as shown in FIG. Therefore, there is a step of making the unequal thickness flat plate member 10A into a flat plate shape without the bent portion 8 and the flat plate material flange portion 9 between the ironing step and the cylindrical member forming step. May be.
  • a pair of molds 53a and 53b sandwich and deform an unequal thickness flat plate member 10A having a bent portion 8 and a flange portion 9 made of a flat plate material, thereby forming an unequal thickness flat plate shape.
  • the member 10A is formed into a flat plate shape without the bent portion 8 and the flange portion 9 of the flat plate material.
  • the bending angle of the bent portion 8 and the intermediate bent portion 9a can be reduced as compared with the case where the intermediate bent portion 9a is not formed. Easy to shape.
  • the flat plate member 10A having an unequal thickness is wound into a cylindrical shape and both ends of the winding (both ends in the direction orthogonal to the ⁇ direction) are butted.
  • a cylindrical member forming step for manufacturing the unequal thickness cylindrical member 10B is performed in the cylindrical member forming process, the flat plate member 10A having an unequal thickness is wound into a cylindrical shape, and both ends of the winding are brought into contact with each other and welded by flash butt welding, butt welding, arc welding, or the like. Trimming is performed to produce an unequal thickness tubular member 10B.
  • the unequal-thickness cylindrical member 10B is configured by only a linear wall in which one of the inner peripheral surface and the outer peripheral surface is an uneven surface and the other surface extends in parallel with the axis.
  • roll forming is performed by roll forming the unequal thickness cylindrical member 10B into the vehicle wheel rim shape.
  • the roll forming process is performed after the axially opposite ends of the unequal thickness tubular member 10B are flared and expanded using the flare processing machine 44.
  • the lower roll 46 and the upper roll 47 The lower roll 46 and the upper roll 47 are brought close to each other while the roll is rotated with the wall of the unequal thickness tubular member 10B interposed therebetween, and the unequal thickness tubular member 10B is formed into a vehicle wheel rim shape.
  • the expander and / or the shrinker 48 are used to perform sizing processing (processing to approach a perfect circle and shaping of the vehicle wheel rim cross-sectional shape) to obtain a final vehicle wheel rim shape.
  • sizing processing processing to approach a perfect circle and shaping of the vehicle wheel rim cross-sectional shape
  • flange portion 9 made of a flat plate material
  • flange portion 10a or 10g of the rim of the vehicle wheel rim 10C.
  • the wheel rim 10C having an unequal thickness after the roll forming process has a flange portion 10a, a bead seat portion 10b, a side wall portion 10c, a drop portion 10d, and a side wall portion in order from one end to the other end in the axial direction. 10e, bead seat portion 10f, and rim flange portion 10g.
  • a vehicle wheel disk (not shown) is fitted into the vehicle wheel rim 10C and welded to form a welding type vehicle wheel. Between each part of vehicle wheel rim 10C, there is a bent part. It is desirable that the bent portions and the flange portions 10a and 10g of the rim have a large load (load, force) generated during normal use and are thicker than the other portions.
  • the flat plate material 2 is formed into an unequal thickness flat plate member 10A by ironing
  • the flat plate material is formed without using the conventional non-uniform thickness by a rolling device and flow forming. Unequal thickness can be achieved.
  • the conventional equipment for the compaction device and the flow forming is replaced with the ironing die 22, the punch 26, and the press machine 30, and the ironing cost is compared with the equipment cost of the compaction device and the flow forming.
  • the punch 26 and the press machine 30 Since the total cost of the die 22, the punch 26 and the press machine 30 is low, the equipment cost can be reduced compared to the conventional case, and the unequal thickness vehicle wheel 10C can be manufactured at a lower cost than the conventional case. Further, compared with the conventional case where the thickness of the material is unequal by flow forming, the time for unequal thickness of the flat plate material can be shortened to about 1/3, and the productivity can be improved. In addition, since the flow forming is replaced by ironing by punching, unlike the case where the material is made unequal by conventional flow forming, the forming mark of the flow forming forming roll does not remain on the unequal thickness tubular member 10B. Appearance quality is maintained.
  • the press machine 30 Since the punch 26 is moved relative to the die 22 and the flat plate material 2 is ironed to produce the unequal thickness flat plate member 10A, the press machine 30 is used for one-way stroke movement of the punch 26 with respect to the die 22. it can. As a result, the molding time can be shortened and the cost of the molding equipment can be reduced.
  • the flat plate material 2 Since the flange portion 9 of the flat plate material is hooked on the die 22 in the ironing process, the flat plate material 2 is restrained from being dragged by the punch 26 and moving relative to the die 22 during molding. High precision molding becomes possible. Further, in the ironing process, the flange portion 9 of the flat plate material is clamped by the pressing member 23 and the die 22, and then at least a part of the flat material 2 other than the flange portion 9 of the flat plate material 2 is ironed. Therefore, as compared with the case where the flange portion 9 of the flat plate material is not clamped by the pressing member 23 and the die 22, the flat plate material 2 is further dragged by the punch 26 and moves relative to the die 22 during molding. Is suppressed.
  • the flange portion 9 of the flat plate material is not ironed except in the vicinity of the bent portion 8, it is not thinned by ironing. Since the flange portion 9 of the flat plate material becomes the rim flange portion 10a (or 10g) and its vicinity by the roll forming process, it can be made relatively thick when molded into the vehicle wheel rim 10C. The durability of the vehicle wheel rim is improved.
  • one or more intermediate bent portions 9a are formed in the flange portion 9 of the flat plate material, so that the intermediate bent portion 9a is formed in the flange portion 9 of the flat plate material.
  • the deformation resistance of the flat plate-shaped flange portion 9 is increased as compared with the case where the flat plate-shaped material 2 is not formed, and the plate-shaped material 2 is further dragged by the punch 26 and is prevented from moving with respect to the die 22 during molding.
  • the bending angle of the bending part 8 and the intermediate bending part 9a can be made small by forming the intermediate
  • the pressing member 23 and the die 22 are pressed against the flange portion 9 of the flat plate material as compared with the case where the intermediate bent portion 9a is formed in the clamping step of the ironing step. It is possible to suppress the displacement of the flat plate-like material 2 with respect to the die 22 when sandwiched between the two.
  • the intermediate bent portion 9a is formed only in the clamping step of the ironing process, it is not necessary to form the intermediate bent portion 9a in the flange portion forming step, and the bent portion 8 and the flange portion of the flat plate material in the flange portion forming step. 9 can be easily formed (the flange portion forming step can be simplified).
  • the flat plate material 2 is ironed while the front end of the punch 26 in the moving direction with respect to the die 22 is pressed by the discharge plate 40, the flat plate material 2 is dragged by the punch 26 during the ironing process. The movement with respect to the die 22 is suppressed. Moreover, it becomes easy to control the amount of elongation of the flat plate-like material 2 by ironing.
  • the convex / concave surface 24 is a protrusion that makes the gap between the die 22 and the punch 26 smaller than the thickness of the flat plate-like material 2 in the moving direction of the punch 26 with respect to the die 22 or in the direction orthogonal to the moving direction of the punch 26 with respect to the die 22. Since at least one portion 24a is provided on the die 22, an unequal thickness flat plate member 10A having a varying thickness can be produced.
  • the rolling member further includes a roll forming step of roll-forming the unequal thickness cylindrical member 10B into a vehicle wheel rim shape.
  • a roll forming step of roll-forming the unequal thickness cylindrical member 10B into a vehicle wheel rim shape By forming at least a part of 10g) from the flange portion 9 made of a flat plate material, an unequal-thick lightweight vehicle wheel rim 10C with improved durability can be produced.
  • the wheel disk for vehicles can also be created by pressing the flat member 10A of unequal thickness after the ironing process.
  • Example 1 In the method for manufacturing the vehicle wheel rim 10C according to the first embodiment of the present invention, as shown in FIGS. 4 and 7, the backup 50 is provided on the opposite side of the punch 26 from the die 22.
  • the backup 50 is fixed to the bolster 38 or a member fixed to the bolster 38 of the press machine 30.
  • An inclined portion 56 that suppresses the hook 26 from being caught by the backup 50 is formed.
  • the inclined portion 56 of the backup 50 is inclined upward and away from the die 22.
  • the punch 26 is formed on the uneven surface of the die 22 during the ironing process. Accordingly, it is possible to manufacture the unequal thickness flat plate member 10A that has been reliably changed to the required thickness, and to move the unequal thickness flat plate member 10A in the cylindrical member forming step.
  • the cylindrical member 10B having an unequal thickness can be manufactured by trimming the bulge and burrs of the welded portion 6 by welding with flash butt welding, butt welding, arc welding, etc.
  • the vehicle wheel rim 10C can be manufactured by roll-forming the unequal thickness tubular member 10B.
  • Example 2 In the method for manufacturing the vehicle wheel rim 10C according to the second embodiment of the present invention, as shown in FIG. 8, the two dies 22 are provided on both sides of the punch 26 with the uneven surface 24 facing the punch 26. Two protrusions 28 of the punch 26 are provided so as to face the uneven surface 24 of the die 22.
  • the flat plate material 2 is set on each of the dies 22 provided on both sides of the punch 26.
  • the two flat materials 2 can be made unequal in thickness at the same time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

L'invention porte sur un procédé de fabrication de jante de roue pour véhicule, le procédé comprenant une étape de réduction de paroi dans laquelle un élément de type plaque plate (10A) ayant une épaisseur non uniforme est fabriqué par réduction de paroi d'un matériau de type plaque plate (2) à l'aide d'un dispositif de réduction de paroi (20) comportant un poinçon (26) et une matrice (22) qui a une surface latérale tournée vers le poinçon (26) et formée en tant que surface irrégulière (24). Dans l'étape de réduction de paroi, le matériau de type plaque plate (2) est placé dans la matrice (22) et le dispositif de réduction de paroi (20) est actionné pour déplacer le poinçon (26) par rapport à la matrice (22). Ainsi, tandis que l'épaisseur du matériau de type plaque plate (2) est modifiée par le poinçon (26) et la surface irrégulière (24) de la matrice (22), le matériau de type plaque plate (2) voit sa paroi réduite pour fabriquer l'élément de type plaque plate (10A) ayant une épaisseur non uniforme. Le procédé de fabrication permet au matériau de type plaque plate d'avoir une épaisseur non uniforme sans utiliser de dispositif roulant et de fluotournage qui sont utilisés classiquement pour fabriquer l'épaisseur non uniforme.
PCT/JP2011/058499 2010-04-06 2011-04-04 Procédé de fabrication de jante de roue pour véhicule WO2011125968A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012509647A JP5749708B2 (ja) 2010-04-06 2011-04-04 車両用ホイールリムの製造方法

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JP2010-087653 2010-04-06
JP2010087653 2010-04-06

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WO2011125968A1 true WO2011125968A1 (fr) 2011-10-13

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JP (1) JP5749708B2 (fr)
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013052442A (ja) * 2011-08-10 2013-03-21 Topy Industries Ltd 車両用ホイールリムの製造方法
WO2014024907A1 (fr) * 2012-08-07 2014-02-13 トピー工業株式会社 Procédé pour la fabrication d'une jante de roue pour une roue
WO2015137463A1 (fr) * 2014-03-14 2015-09-17 新日鐵住金株式会社 Procédé de fabrication de jante de roue et procédé de fabrication de jante de roue d'automobile

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10180387A (ja) * 1996-11-05 1998-07-07 Topy Ind Ltd ホイール用リム素材の製造方法
JP2006297461A (ja) * 2005-04-22 2006-11-02 Nissan Motor Co Ltd 差厚板の製造方法および製造装置
JP2009285712A (ja) * 2008-05-30 2009-12-10 Honda Motor Co Ltd しごき加工装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10180387A (ja) * 1996-11-05 1998-07-07 Topy Ind Ltd ホイール用リム素材の製造方法
JP2006297461A (ja) * 2005-04-22 2006-11-02 Nissan Motor Co Ltd 差厚板の製造方法および製造装置
JP2009285712A (ja) * 2008-05-30 2009-12-10 Honda Motor Co Ltd しごき加工装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013052442A (ja) * 2011-08-10 2013-03-21 Topy Industries Ltd 車両用ホイールリムの製造方法
WO2014024907A1 (fr) * 2012-08-07 2014-02-13 トピー工業株式会社 Procédé pour la fabrication d'une jante de roue pour une roue
CN104540612A (zh) * 2012-08-07 2015-04-22 都美工业株式会社 车辆用车轮轮辋的制造方法
JPWO2014024907A1 (ja) * 2012-08-07 2016-07-25 トピー工業株式会社 車両用ホイールリムの製造方法
WO2015137463A1 (fr) * 2014-03-14 2015-09-17 新日鐵住金株式会社 Procédé de fabrication de jante de roue et procédé de fabrication de jante de roue d'automobile
US10661328B2 (en) 2014-03-14 2020-05-26 Nippon Steel Corporation Production method of wheel rim, and production method of vehicle wheel rim

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