WO2014167686A1 - Hollow cylindrical member - Google Patents

Hollow cylindrical member Download PDF

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Publication number
WO2014167686A1
WO2014167686A1 PCT/JP2013/060918 JP2013060918W WO2014167686A1 WO 2014167686 A1 WO2014167686 A1 WO 2014167686A1 JP 2013060918 W JP2013060918 W JP 2013060918W WO 2014167686 A1 WO2014167686 A1 WO 2014167686A1
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WO
WIPO (PCT)
Prior art keywords
clinch
butted
recess
hollow cylindrical
cylindrical member
Prior art date
Application number
PCT/JP2013/060918
Other languages
French (fr)
Japanese (ja)
Inventor
裕司 内山
Original Assignee
株式会社ヨロズ
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.)
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Publication date
Application filed by 株式会社ヨロズ filed Critical 株式会社ヨロズ
Priority to PCT/JP2013/060918 priority Critical patent/WO2014167686A1/en
Publication of WO2014167686A1 publication Critical patent/WO2014167686A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/051—Trailing arm twist beam axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/20—Constructional features of semi-rigid axles, e.g. twist beam type axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8102—Shaping by stamping

Definitions

  • the present invention relates to a hollow cylindrical member such as a color member formed by winding a plate material.
  • a link member that can be rotatably or swingably mounted is widely used to support the member or transmit a load.
  • a link member is incorporated in a vehicle suspension mechanism.
  • the vehicle suspension mechanism includes arm members such as a trailing arm and a suspension arm, and a hollow cylindrical collar member that pivotally supports the arm member on the vehicle body is joined to the arm member.
  • a link member is constituted by the arm member and the collar member.
  • the collar member is generally manufactured by cutting a hollow pipe and welded to the tip of the arm member (see, for example, Patent Document 1).
  • a hollow cylindrical member such as a color member
  • a hollow cylindrical member is manufactured by winding a strip-shaped plate material and butting both end faces of the plate material into a cylindrical shape. Both end surfaces are joined by fitting of clinch portions provided on both end surfaces so that the butted end surfaces are not opened.
  • the hollow that can reduce the material cost by increasing the material yield when forming the clinch portion Realization of a cylindrical member is required.
  • the present invention has been made to meet the above-mentioned demands, and an object of the present invention is to provide a hollow cylindrical member capable of increasing the material yield when forming the clinch portion and reducing the material cost.
  • the present invention that achieves the above object is a hollow cylindrical member formed by bending a strip-shaped plate material.
  • the hollow cylindrical member is provided on a first abutting end surface provided on one end side of the main body portion of the plate material and on the other end side of the main body portion, and the first abutting is performed by bending the main body portion.
  • a second butted end surface that is abutted against and joined to the end surface; a first clinching portion provided on the one end side; and a second fitting that is provided on the other end side and fits the first clinching portion.
  • a clinch portion A clinch portion.
  • the first clinching portion includes a recess where an insertion port opens in the first butted end surface, and a locking portion that is provided in the recess and locks the second clinching portion, and The first butted end face is formed without going outward.
  • the second clinch portion includes a protruding piece that protrudes outward beyond the second butted end surface and fits into the recess of the first clinch portion.
  • the convex piece of the second clinching portion extends along the second butted end surface while being inserted into the recess from the insertion port when the first and second butted end surfaces are butted from the circumferential direction. It is plastically deformed in the direction and is locked to the locking portion.
  • the first clinch portion does not extend outward from the first butted end surface.
  • the locking portion provided in the recess of the first clinching portion sufficiently exhibits the function of preventing the disconnection in a state where the locking portion is fitted to the second clinching portion. Therefore, the plate material has an excellent material yield when forming the clinch portion. As a result, the material yield can be increased to reduce the material cost, and the cost of the hollow cylindrical member can be further reduced. As a result, it is possible to contribute to cost reduction of parts to which the hollow cylindrical member is applied.
  • FIG. 1A is a bottom view showing a torsion beam suspension using a collar member which is an example of a hollow cylindrical member
  • FIG. 1B is a view as seen from an arrow 1B in FIG. is there.
  • FIG. 2A is a perspective view showing a collar member
  • FIG. 2B is a front view showing a strip-shaped plate material before bending.
  • FIGS. 3A and 3B are views showing a state in which the first butted end surface and the second butted end surface are butted and joined. It is a front view which shows the comparative board
  • FIG. 1A is a bottom view showing a torsion beam suspension 100 in which a collar member 60 which is an example of a hollow cylindrical member is used
  • FIG. 1B is an arrow view seen from an arrow 1B in FIG. FIG.
  • a torsion beam suspension 100 shown in FIGS. 1A and 1B is a vehicle suspension mechanism disposed on the rear side of the vehicle.
  • the torsion beam suspension 100 includes a torsion beam 10 that extends in the left-right direction of the vehicle body, a trailing arm 20 as an arm member joined to both ends of the torsion beam 10, and a roll rigidity that is disposed inside the torsion beam 10.
  • the torsion beam 10 is a U-shaped beam and is arranged so that the U-shaped opening portion faces downward when mounted on a vehicle.
  • the trailing arm 20 includes an upper member 22 having a recess and a flat lower member 23.
  • the upper member 22 has a spring seat 24 that receives a spring that absorbs an impact from the tire.
  • the lower member 23 is disposed so as to close the recess of the upper member 22 and prevents the upper member 22 from being deformed.
  • a hollow cylindrical collar member 60 that pivotally supports the trailing arm 20 on the vehicle body is welded to the trailing arm 20 by welding.
  • FIG. 2A is a perspective view showing the collar member 60
  • FIG. 2B is a front view showing a strip-like plate material 61 before bending
  • FIGS. 3A and 3B are first views. It is a figure which shows a mode that the butting end surface 63 and the 2nd butting end surface 64 are faced
  • a collar member 60 as a hollow cylindrical member is formed by bending a strip-shaped plate material 61.
  • the collar member 60 is provided on a first butted end surface 63 provided on one end portion side of the main body portion 62 of the plate member 61 and on the other end side of the main body portion 62, and the main body portion 62 is bent.
  • the second butting end surface 64 that is butted and joined to the first butting end surface 63, the first clinch portion 70 provided on one end side, and the first clinch portion 70 provided on the other end side.
  • a second clinch portion 80 that fits together.
  • the first clinching part 70 includes a recess 72 in which the insertion port 71 is opened in the first butting end surface 63, and a locking part 73 that is provided in the recess 72 and locks the second clinching part 80.
  • the second clinch portion 80 includes a protruding piece 81 that protrudes outward beyond the second butted end face 64 and fits into the recess 72 of the first clinch portion 70.
  • the convex piece 81 of the second clinching portion 80 is inserted into the recess 72 from the insertion port 71 when the first and second butted end surfaces 63 and 64 are butted against each other from the circumferential direction. Is plastically deformed in a direction along the direction and is locked to the locking portion 73. This will be described in detail below.
  • the hollow cylindrical member is applied to the collar member 60 that pivotally supports the trailing arm 20 that is a movable member.
  • the size and thickness of the plate member 61, the number, shape, size, and the like of the first and second clinch portions 70 and 80 are appropriately selected.
  • the recess 72 of the first clinching portion 70 has a tongue shape extending elongated from the insertion port 71 toward the inside of the main body portion 62.
  • the recess 72 is formed to extend in a direction intersecting with the longitudinal direction (X axis) of the plate material 61.
  • An overhang portion 65 is provided at the edge forming the insertion port 71 so as to project into the recess 72 like an eaves.
  • the overhang portion 65 constitutes a locking portion 73 that locks the second clinching portion 80.
  • the first clinch portion 70 is formed so as not to extend outward from the first butted end surface 63 (right side of the first butted end surface 63 indicated by a two-dot chain line in FIG. 2B).
  • the convex piece 81 of the second clinching portion 80 is formed such that its tip can be inserted into the insertion port 71 of the recess 72.
  • the length of the convex piece 81 in the X-axis direction is longer than the first and second butted end surfaces 63 and 64 are in contact with each other when the first and second butted end surfaces 63 and 64 are butted from the circumferential direction. Before, it is set to the length dimension which contacts the inner wall of the recess 72 (see FIG. 3A). When the first and second butted end surfaces 63 and 64 are pushed so as to approach each other, the tip of the convex piece 81 is guided along the inner wall of the recess 72, and Y along the second butted end surface 64.
  • the first clinch portions 70 are provided in pairs in the direction along the first butting end surface 63, and the second clinch portions 80 are provided in pairs in the direction along the second butting end surface 64. Yes.
  • the direction d extending from the insertion port 71 toward the inside of the main body portion 62 is a direction away from each other.
  • two pairs of four first clinching sections 70 and second clinching sections 80 are provided.
  • FIG. 4 is a front view showing a proportional plate material 91 in which a clinch portion having a low material yield is formed.
  • the length of the main body 92 of the plate 91 is longer by ⁇ L of the protruding portion 95a of the first clinch portion 95 than in the case of the embodiment.
  • the protruding portion 95a of the first clinching portion 95 is not a portion that exhibits a function of preventing the removal in a state where the protruding portion 95a is fitted to the second clinching portion 96. Therefore, the proportional plate member 91 has a poor material yield when forming the clinch portions 95 and 96 due to the presence of the protruding portion 95a of the first clinch portion 95. As a result, the material cost cannot be reduced.
  • the first clinching portion 70 does not extend outward from the first butted end surface 63.
  • the locking portion 73 provided in the recess 72 of the first clinching portion 70 sufficiently exhibits the function of preventing the removal in a state where the locking portion 73 is fitted to the second clinching portion 80. Therefore, the plate material 61 of this embodiment has excellent material yield when the clinch portions 70 and 80 are formed. As a result, the material yield can be increased to reduce the material cost, and the cost of the collar member 60 can be further reduced. As a result, it is possible to contribute to cost reduction of a component (for example, the trailing arm 20) to which the collar member 60 is applied.
  • a component for example, the trailing arm 20
  • the first and second butted end surfaces of the plate material are overlapped from the direction along the end surface (the radial direction of the hollow cylindrical member) by roll forming. I can.
  • the relatively thick plate 61 is used in the collar member 60 that requires strong rigidity, it is difficult to apply roll forming.
  • the first and second butted end surfaces 63 and 64 are butted from the circumferential direction by press molding.
  • the convex piece 81 is inserted into the recess 72 from the insertion port 71.
  • the plate material 61 Since the plate material 61 is bent in the circumferential direction by press molding, the straight portion does not remain on the convex piece 81 as well as the main body portion 62 of the plate material 61. As a result, the roundness of the collar member 60 can be increased.
  • the molds used for manufacturing the color member 60 are pre-molded first and second molds 110 and 120 (FIGS. 5A and 5B) and a preformed plate material 61 in an arc shape.
  • First to third bending molds 130, 140, and 150 (FIGS. 5C, 5D, and 5E) for folding, and a wrist mold 160 (FIG. 5F) are provided. is doing.
  • the mold is shown in a cross section that intersects the feeding direction of the plate material 61.
  • a first clinching part 70 is provided on one end side of the main body 62 of the plate member 61 and a second clinching part 80 is provided on the other end side by a pressing device (not shown).
  • the first molding die 110 for preforming includes a pair of upper and lower dies 111 and 112.
  • a pre-molding step is performed in which the central portion and both side edge portions of the plate material 61 in the direction intersecting the feeding direction of the plate material 61 are competed by the convex portion 113 of the upper die 111 and the concave portion 114 of the lower die 112.
  • the second molding die 120 for preforming includes a pair of upper and lower dies 121, 122.
  • a preforming step is performed in which the convex portions 123 of the upper mold 121 and the concave portions 124 of the lower mold 122 further abut both side edges of the plate material 61 in the direction intersecting the feeding direction of the plate material 61.
  • the second mold 120 is provided with a punch member 126 urged by a spring member 125 at the central portion of the lower mold 122. At the time of pressurization, the punch member 126 is further lowered from the mold surface of the lower mold 122 so that the central portion of the plate material 61 is easily formed into an arc shape.
  • the first forming mold 130 for bending includes a pair of upper and lower molds 131 and 132.
  • a bending step of making the plate material 61 preformed in the previous step into a U-shaped cross section is performed by the convex portion 133 of the upper die 131 and the concave portion 134 of the lower die 132.
  • the first mold 130 is also provided with a punch member 136 urged by a spring member 135 at the center portion of the lower mold 132.
  • the punch member 136 is pressed by the convex portion 133 of the upper mold 131 and is further lowered from the mold surface of the lower mold 132 so that the central portion of the plate material 61 approaches an arc shape.
  • the second forming die 140 for bending includes a pair of upper and lower dies 141 and 142.
  • the second stage bending process is performed so that the plate material 61 formed by the first stage bending in the previous process is brought close to an arc shape by the convex part 143 of the upper mold 141 and the concave part 144 of the lower mold 142.
  • the second mold 140 is also provided with a punch member 146 urged by a spring member 145 at the central portion of the lower mold 142.
  • the shape of the convex portion 143 of the upper mold 141 is a columnar portion 147 whose axis extends in the feed direction of the plate material 61 so that both side edges of the plate material 61 are more easily formed into an arc shape.
  • the third molding die 150 for bending includes a pair of upper and lower dies 151 and 152.
  • the upper die 151 is provided with a semicircular recess 153
  • the lower die 152 is provided with a substantially circular recess 154 together with the recess 153 of the upper die 151.
  • a third-stage bending process is performed by both concave portions 153 and 154 so that the plate material 61 formed by the second-stage bending in the previous process is brought closer to an arc shape.
  • the concave portion 154 of the lower mold 152 is configured such that the upper end portion of the side edge portion 155 slightly enters the mouth edge portion of the concave portion 153 of the upper mold 151 during the third stage of bending.
  • a plate 61 that is close to a circular shape is tightened from the outer periphery, and molding is performed so as to approach an arc shape.
  • the wrist-like mold 160 includes a pair of upper and lower molds 161 and 162.
  • the upper mold 161 is provided with a semicircular recess 163, and the lower mold 162 is provided with a recess 164 that has a substantially circular shape together with the recess 163 of the upper mold 161.
  • a re-striking step of finishing the plate material 61 which has been bent and formed in the third stage in the previous step into a circular cross section is performed.
  • the convex piece 81 of the second clinching portion 80 is recessed from the insertion port 71 when the first and second butted end surfaces 63 and 64 are butted together in the circumferential direction by the third-stage bending process and the wrist-like process. While being inserted into the location 72, it is plastically deformed in the direction along the second butting end face 64 and is locked to the locking portion 73.
  • the first clinch portion 70 is formed so as not to extend outward from the first butted end face 63. Furthermore, the convex piece 81 of the second clinch portion 80 is inserted into the recess 72 from the insertion port 71 when the first and second butted end surfaces 63 and 64 are butted together from the circumferential direction. It is plastically deformed in the direction along 64 and is locked to the locking portion 73. As described above, the locking portion 73 provided in the recess 72 of the first clinching portion 70 sufficiently exhibits the function of preventing the disconnection in a state where it is fitted to the second clinching portion. Therefore, the plate material 61 has excellent material yield when forming the clinch portions 70 and 80.
  • the material yield can be increased to reduce the material cost, and the cost of the collar member 60 can be further reduced.
  • the first clinch portions 70 are provided in pairs in the direction along the first abutting end surface 63, and the second clinch portions 80 are provided in pairs in the direction along the second abutting end surface 64.
  • directions d extending from the insertion port 71 toward the inside of the main body portion 62 are directions away from each other. According to such a configuration, the fitting between the first clinching part 70 and the second clinching part 80 is strengthened, and the first and second clinching parts 70, 80 are prevented from coming off, and the collar member 60 has the first fitting. It is possible to prevent the first and second butted end surfaces 63 and 64 from opening.
  • the hollow cylindrical member is applied to the collar member 60 that pivotally supports a movable member, it is possible to contribute to cost reduction of the movable member, for example, the trailing arm 20.
  • this invention is not limited to embodiment mentioned above, It can modify
  • the respective recesses 72 of the pair of first clinch portions 70 the embodiment in which the direction d extending from the insertion port 71 toward the inside of the main body portion 62 is a direction away from each other has been described. The case is not limited.
  • the direction d extending from the insertion port 71 toward the inside of the main body portion 62 may be a direction in which they approach each other. Even in this case, the same effects as described above can be obtained.
  • the shape of the first and second clinch portions 70 and 80 (clinch length, lapping allowance, clinch width, clinch quantity, etc.) can adopt various shapes, and is not limited to the illustrated shapes.
  • the present invention is not limited to this case, and is widely applied to a hollow cylindrical member formed by bending a strip-shaped plate material 61. It goes without saying that it is possible.
  • Torsion beam 10 Torsion beam, 20 Trailing arm (movable member), 30 roll bar, 60 color member (hollow cylindrical member), 61 Plate material, 62 body, 63 first butted end face, 64 second butted end face, 65 Overhang part, 70 first clinch section, 71 insertion slot, 72 recess, 73 locking part, 80 second clinch section, 81 convex pieces, 100 torsion beam suspension, d A direction extending from the insertion port toward the inside of the main body.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

[Problem] To provide a hollow cylindrical member such that material cost can be reduced by increasing material yield in forming a clinch portion. [Solution] A collar member (60) as a hollow cylindrical member is formed by bending a strip-shaped sheet material (61). A first clinch portion (70) of the collar member includes a recess (72) with an insertion opening (71) opening on a first abutting end surface (63), and a locking portion (73) disposed in the recess and locking a second clinch portion (80). The first clinch portion is formed without extending beyond the first abutting end surface. The second clinch portion protrudes outward beyond the second abutting end surface (64), and is provided with a projection (81) fitted in the recess of the first clinch portion. The projection of the second clinch portion, when the first and second abutting end surfaces are abutted on each other from a circumferential direction, is plastically deformed in a direction along the second abutting end surface while being inserted into the recess via the insertion opening and locked in the locking portion.

Description

中空円筒部材Hollow cylindrical member
　本発明は、板材を巻き成形することによって形成されるカラー部材などの中空円筒部材に関する。 The present invention relates to a hollow cylindrical member such as a color member formed by winding a plate material.
　部材を支持したり、負荷を伝達したりするために、回転あるいは揺動自在に取り付けられるリンク部材が広く用いられている。例えば、自動車においては、車両用サスペンション機構にリンク部材が組み込まれている。車両用サスペンション機構は、トレーリングアームやサスペンションアームなどのアーム部材を有し、アーム部材にはアーム部材を車体に軸支する中空円筒形状のカラー部材が接合されている。アーム部材およびカラー部材からリンク部材が構成されている。カラー部材は、一般に中空パイプを切断することによって製造され、アーム部材の先端に溶接接合されている（例えば、特許文献１参照。）。 A link member that can be rotatably or swingably mounted is widely used to support the member or transmit a load. For example, in an automobile, a link member is incorporated in a vehicle suspension mechanism. The vehicle suspension mechanism includes arm members such as a trailing arm and a suspension arm, and a hollow cylindrical collar member that pivotally supports the arm member on the vehicle body is joined to the arm member. A link member is constituted by the arm member and the collar member. The collar member is generally manufactured by cutting a hollow pipe and welded to the tip of the arm member (see, for example, Patent Document 1).
特開２００３－３００４０５号公報JP 2003-300405 A
　カラー部材のような中空円筒部材のコストを低減するために、短冊状の板材を巻いて板材の両端面を突き合わせて円筒形状に成形することによって、中空円筒部材を製造することが行われている。突き合わせた両端面が開かないように、両端面に設けたクリンチ部の嵌め合いによって両端面を接合している。 In order to reduce the cost of a hollow cylindrical member such as a color member, a hollow cylindrical member is manufactured by winding a strip-shaped plate material and butting both end faces of the plate material into a cylindrical shape. . Both end surfaces are joined by fitting of clinch portions provided on both end surfaces so that the butted end surfaces are not opened.
　中空円筒部材のさらなるコスト低減を図って、この中空円筒部材を適用した部品等の低コスト化に寄与するために、クリンチ部を形成するときの材料歩留りを高めて材料費の低減を図り得る中空円筒部材の実現が要請されている。 In order to further reduce the cost of the hollow cylindrical member and contribute to the cost reduction of parts and the like to which the hollow cylindrical member is applied, the hollow that can reduce the material cost by increasing the material yield when forming the clinch portion Realization of a cylindrical member is required.
　本発明は、上記要請に応えるべくなされたものであり、クリンチ部を形成するときの材料歩留りを高めて材料費の低減を図り得る中空円筒部材を提供することを目的とする。 The present invention has been made to meet the above-mentioned demands, and an object of the present invention is to provide a hollow cylindrical member capable of increasing the material yield when forming the clinch portion and reducing the material cost.
　上記目的を達成する本発明は、短冊状の板材を曲げ成形することによって形成される中空円筒部材である。中空円筒部材は、板材の本体部の一端部側に設けられた第１の突き合わせ端面と、前記本体部の他端部側に設けられ、前記本体部を曲げ成形することによって前記第１の突き合わせ端面に突き合わされて接合される第２の突き合わせ端面と、前記一端部側に設けられた第１のクリンチ部と、前記他端部側に設けられ前記第１のクリンチ部と嵌り合う第２のクリンチ部と、を有している。前記第１のクリンチ部は、前記第１の突き合わせ端面に挿入口が開口する凹所と、前記凹所内に設けられ前記第２のクリンチ部を係止する係止部と、を備え、かつ、前記第１の突き合わせ端面から外方に越えることなく形成されている。前記第２のクリンチ部は、前記第２の突き合わせ端面を越えて外方に突出し、前記第１のクリンチ部の前記凹所に嵌まり合う凸片を備えている。前記第２のクリンチ部の前記凸片は、前記第１と第２の突き合わせ端面同士を周方向から突き合わせるときに、前記挿入口から前記凹所に挿入されつつ前記第２の突き合わせ端面に沿う方向に塑性変形して、前記係止部に係止される。 The present invention that achieves the above object is a hollow cylindrical member formed by bending a strip-shaped plate material. The hollow cylindrical member is provided on a first abutting end surface provided on one end side of the main body portion of the plate material and on the other end side of the main body portion, and the first abutting is performed by bending the main body portion. A second butted end surface that is abutted against and joined to the end surface; a first clinching portion provided on the one end side; and a second fitting that is provided on the other end side and fits the first clinching portion. A clinch portion. The first clinching portion includes a recess where an insertion port opens in the first butted end surface, and a locking portion that is provided in the recess and locks the second clinching portion, and The first butted end face is formed without going outward. The second clinch portion includes a protruding piece that protrudes outward beyond the second butted end surface and fits into the recess of the first clinch portion. The convex piece of the second clinching portion extends along the second butted end surface while being inserted into the recess from the insertion port when the first and second butted end surfaces are butted from the circumferential direction. It is plastically deformed in the direction and is locked to the locking portion.
　本発明によれば、第１のクリンチ部は、第１の突き合わせ端面から外方に越えない。第１のクリンチ部の凹所内に設けた係止部が、第２のクリンチ部と嵌り合った状態において抜け防止の機能を十分に発揮する。したがって、板材は、クリンチ部を形成するときの材料歩留りが優れたものとなる。この結果、材料歩留りを高めて材料費の低減を図ることができ、中空円筒部材のさらなるコスト低減を図ることができる。ひいては、この中空円筒部材を適用した部品の低コスト化に寄与することが可能となる。 According to the present invention, the first clinch portion does not extend outward from the first butted end surface. The locking portion provided in the recess of the first clinching portion sufficiently exhibits the function of preventing the disconnection in a state where the locking portion is fitted to the second clinching portion. Therefore, the plate material has an excellent material yield when forming the clinch portion. As a result, the material yield can be increased to reduce the material cost, and the cost of the hollow cylindrical member can be further reduced. As a result, it is possible to contribute to cost reduction of parts to which the hollow cylindrical member is applied.
図１（Ａ）は、中空円筒部材の一例であるカラー部材が用いられたトーションビーム式サスペンションを示す底面図、図１（Ｂ）は、図１（Ａ）の矢印１Ｂから見た矢視図である。FIG. 1A is a bottom view showing a torsion beam suspension using a collar member which is an example of a hollow cylindrical member, and FIG. 1B is a view as seen from an arrow 1B in FIG. is there. 図２（Ａ）は、カラー部材を示す斜視図、図２（Ｂ）は、曲げ成形する前の短冊状の板材を示す正面図である。FIG. 2A is a perspective view showing a collar member, and FIG. 2B is a front view showing a strip-shaped plate material before bending. 図３（Ａ）（Ｂ）は、第１の突き合わせ端面と第２の突き合わせ端面とを突き合わせて接合する様子を示す図である。FIGS. 3A and 3B are views showing a state in which the first butted end surface and the second butted end surface are butted and joined. 材料歩留りが低いクリンチ部が形成された対比例の板材を示す正面図である。It is a front view which shows the comparative board | plate material in which the clinch part with a low material yield was formed. 板材を周方向に曲げ加工する各工程のうち、予備成形用の第１成形型を示す断面図である。It is sectional drawing which shows the 1st shaping | molding die for preforming among each process of bending a board | plate material to the circumferential direction. 予備成形用の第２成形型を示す断面図である。It is sectional drawing which shows the 2nd shaping | molding die for preforming. 折り曲げ用の第１成形型を示す断面図である。It is sectional drawing which shows the 1st shaping | molding die for bending. 折り曲げ用の第２成形型を示す断面図である。It is sectional drawing which shows the 2nd shaping | molding die for bending. 折り曲げ用の第３成形型を示す断面図である。It is sectional drawing which shows the 3rd shaping | molding die for bending. リストライク用の成形型を示す断面図である。It is sectional drawing which shows the shaping | molding die for list-like.
　以下、添付した図面を参照しながら、本発明の実施形態を説明する。なお、図面の説明において同一の要素には同一の符号を付し、重複する説明を省略する。図面の寸法比率は、説明の都合上誇張されており、実際の比率とは異なる。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The dimensional ratios in the drawings are exaggerated for convenience of explanation, and are different from the actual ratios.
　図１（Ａ）は、中空円筒部材の一例であるカラー部材６０が用いられたトーションビーム式サスペンション１００を示す底面図、図１（Ｂ）は、図１（Ａ）の矢印１Ｂから見た矢視図である。 1A is a bottom view showing a torsion beam suspension 100 in which a collar member 60 which is an example of a hollow cylindrical member is used, and FIG. 1B is an arrow view seen from an arrow 1B in FIG. FIG.
　図１（Ａ）（Ｂ）に示すトーションビーム式サスペンション１００は、車両のリア側に配置される車両用サスペンション機構である。トーションビーム式サスペンション１００は、車体の左右方向に伸延して配置されるトーションビーム１０と、トーションビーム１０の両端部に接合されるアーム部材としてのトレーリングアーム２０と、トーションビーム１０の内部に配置されロール剛性を調整するロールバー３０と、を有する。 A torsion beam suspension 100 shown in FIGS. 1A and 1B is a vehicle suspension mechanism disposed on the rear side of the vehicle. The torsion beam suspension 100 includes a torsion beam 10 that extends in the left-right direction of the vehicle body, a trailing arm 20 as an arm member joined to both ends of the torsion beam 10, and a roll rigidity that is disposed inside the torsion beam 10. A roll bar 30 to be adjusted.
　トーションビーム１０は、Ｕ字状のビームであり、車両搭載時にＵ字形状の開口部分が下方を向くように配置される。 The torsion beam 10 is a U-shaped beam and is arranged so that the U-shaped opening portion faces downward when mounted on a vehicle.
　トレーリングアーム２０は、凹部を有するアッパー部材２２と、平板状のロア部材２３と、を有する。アッパー部材２２は、タイヤからの衝撃を吸収するスプリングを受けるスプリングシート２４を有する。ロア部材２３は、アッパー部材２２の凹部を塞ぐように配置され、アッパー部材２２の変形を防止する。トレーリングアーム２０には、このトレーリングアーム２０を車体に軸支する中空円筒形状のカラー部材６０が溶接接合されている。 The trailing arm 20 includes an upper member 22 having a recess and a flat lower member 23. The upper member 22 has a spring seat 24 that receives a spring that absorbs an impact from the tire. The lower member 23 is disposed so as to close the recess of the upper member 22 and prevents the upper member 22 from being deformed. A hollow cylindrical collar member 60 that pivotally supports the trailing arm 20 on the vehicle body is welded to the trailing arm 20 by welding.
　図２（Ａ）は、カラー部材６０を示す斜視図、図２（Ｂ）は、曲げ成形する前の短冊状の板材６１を示す正面図、図３（Ａ）（Ｂ）は、第１の突き合わせ端面６３と第２の突き合わせ端面６４とを突き合わせて接合する様子を示す図である。なお、図２（Ｂ）において、軸Ｘは板材６１の長手方向を示し、軸Ｙは第１と第２の突き合わせ端面６３、６４に沿う方向を示している。 2A is a perspective view showing the collar member 60, FIG. 2B is a front view showing a strip-like plate material 61 before bending, and FIGS. 3A and 3B are first views. It is a figure which shows a mode that the butting end surface 63 and the 2nd butting end surface 64 are faced | matched and joined. 2B, the axis X indicates the longitudinal direction of the plate member 61, and the axis Y indicates the direction along the first and second butted end surfaces 63 and 64.
　図２（Ａ）（Ｂ）および図３（Ａ）（Ｂ）を参照して、中空円筒部材としてのカラー部材６０は、短冊状の板材６１を曲げ成形することによって形成されている。カラー部材６０は、概説すると、板材６１の本体部６２の一端部側に設けられた第１の突き合わせ端面６３と、本体部６２の他端部側に設けられ、本体部６２を曲げ成形することによって第１の突き合わせ端面６３に突き合わされて接合される第２の突き合わせ端面６４と、一端部側に設けられた第１のクリンチ部７０と、他端部側に設けられ第１のクリンチ部７０と嵌り合う第２のクリンチ部８０と、を有している。第１のクリンチ部７０は、第１の突き合わせ端面６３に挿入口７１が開口する凹所７２と、凹所７２内に設けられ第２のクリンチ部８０を係止する係止部７３と、を備え、かつ、第１の突き合わせ端面６３から外方に越えることなく形成されている。第２のクリンチ部８０は、第２の突き合わせ端面６４を越えて外方に突出し、第１のクリンチ部７０の凹所７２に嵌まり合う凸片８１を備えている。第２のクリンチ部８０の凸片８１は、第１と第２の突き合わせ端面６３、６４同士を周方向から突き合わせるときに、挿入口７１から凹所７２に挿入されつつ第２の突き合わせ端面６４に沿う方向に塑性変形して、係止部７３に係止される。以下詳述する。 Referring to FIGS. 2A and 2B and FIGS. 3A and 3B, a collar member 60 as a hollow cylindrical member is formed by bending a strip-shaped plate material 61. In general, the collar member 60 is provided on a first butted end surface 63 provided on one end portion side of the main body portion 62 of the plate member 61 and on the other end side of the main body portion 62, and the main body portion 62 is bent. The second butting end surface 64 that is butted and joined to the first butting end surface 63, the first clinch portion 70 provided on one end side, and the first clinch portion 70 provided on the other end side. And a second clinch portion 80 that fits together. The first clinching part 70 includes a recess 72 in which the insertion port 71 is opened in the first butting end surface 63, and a locking part 73 that is provided in the recess 72 and locks the second clinching part 80. Provided, and formed so as not to extend outward from the first butted end face 63. The second clinch portion 80 includes a protruding piece 81 that protrudes outward beyond the second butted end face 64 and fits into the recess 72 of the first clinch portion 70. The convex piece 81 of the second clinching portion 80 is inserted into the recess 72 from the insertion port 71 when the first and second butted end surfaces 63 and 64 are butted against each other from the circumferential direction. Is plastically deformed in a direction along the direction and is locked to the locking portion 73. This will be described in detail below.
　本実施形態では、中空円筒部材として、可動自在な部材であるトレーリングアーム２０を軸支するカラー部材６０に適用している。この適用を行う範囲内で、板材６１の大きさおよび肉厚、第１と第２のクリンチ部７０、８０の個数、形状、および大きさなどが適宜選択される。 In this embodiment, the hollow cylindrical member is applied to the collar member 60 that pivotally supports the trailing arm 20 that is a movable member. Within the range in which this application is performed, the size and thickness of the plate member 61, the number, shape, size, and the like of the first and second clinch portions 70 and 80 are appropriately selected.
　第１のクリンチ部７０の凹所７２は、挿入口７１から本体部６２の内方に向けて細長く伸びた舌形状を有している。凹所７２は、板材６１の長手方向（Ｘ軸）に対して交差する方向に伸びて形成されている。挿入口７１を形成する縁部には、凹所７２内に向けてひさしのように張り出したオーバーハング部６５が設けられている。このオーバーハング部６５によって、第２のクリンチ部８０を係止する係止部７３が構成されている。第１のクリンチ部７０は、第１の突き合わせ端面６３から外方（図２（Ｂ）において２点鎖線によって示される第１の突き合わせ端面６３の右側）に越えることなく形成されている。 The recess 72 of the first clinching portion 70 has a tongue shape extending elongated from the insertion port 71 toward the inside of the main body portion 62. The recess 72 is formed to extend in a direction intersecting with the longitudinal direction (X axis) of the plate material 61. An overhang portion 65 is provided at the edge forming the insertion port 71 so as to project into the recess 72 like an eaves. The overhang portion 65 constitutes a locking portion 73 that locks the second clinching portion 80. The first clinch portion 70 is formed so as not to extend outward from the first butted end surface 63 (right side of the first butted end surface 63 indicated by a two-dot chain line in FIG. 2B).
　第２のクリンチ部８０の凸片８１は、その先端部が、凹所７２の挿入口７１に挿入可能に形成されている。凸片８１のＸ軸方向の長さは、第１と第２の突き合わせ端面６３、６４同士を周方向から突き合わせるときに、第１と第２の突き合わせ端面６３、６４同士が当接するよりも前に、凹所７２の内壁に当接する長さ寸法に設定される（図３（Ａ）を参照）。第１と第２の突き合わせ端面６３、６４同士をさらに接近させるように押し込むと、凸片８１は、その先端部が凹所７２の内壁に沿ってガイドされ、第２の突き合わせ端面６４に沿うＹ軸方向に塑性変形する。凸片８１は、その先端部がオーバーハング部６５を超えて凹所７２の底部に達するまで塑性変形する（図３（Ｂ）を参照）この結果、凸片８１が係止部７３に係止されることになる。 The convex piece 81 of the second clinching portion 80 is formed such that its tip can be inserted into the insertion port 71 of the recess 72. The length of the convex piece 81 in the X-axis direction is longer than the first and second butted end surfaces 63 and 64 are in contact with each other when the first and second butted end surfaces 63 and 64 are butted from the circumferential direction. Before, it is set to the length dimension which contacts the inner wall of the recess 72 (see FIG. 3A). When the first and second butted end surfaces 63 and 64 are pushed so as to approach each other, the tip of the convex piece 81 is guided along the inner wall of the recess 72, and Y along the second butted end surface 64. Plastically deforms in the axial direction. The convex piece 81 is plastically deformed until the tip portion thereof reaches the bottom of the recess 72 beyond the overhang portion 65 (see FIG. 3B). As a result, the convex piece 81 is locked to the locking portion 73. Will be.
　第１のクリンチ部７０は、第１の突き合わせ端面６３に沿う方向に対をなして設けられ、第２のクリンチ部８０は、第２の突き合わせ端面６４に沿う方向に対をなして設けられている。対をなす第１のクリンチ部７０のそれぞれの凹所７２は、挿入口７１から本体部６２の内方に向けて伸びる方向ｄが、互いに離反する方向となっている。図示する実施形態では、第１のクリンチ部７０および第２のクリンチ部８０は、それぞれ、２対の４個が設けられている。 The first clinch portions 70 are provided in pairs in the direction along the first butting end surface 63, and the second clinch portions 80 are provided in pairs in the direction along the second butting end surface 64. Yes. In each of the recesses 72 of the pair of first clinch portions 70, the direction d extending from the insertion port 71 toward the inside of the main body portion 62 is a direction away from each other. In the illustrated embodiment, two pairs of four first clinching sections 70 and second clinching sections 80 are provided.
　図４は、材料歩留りが低いクリンチ部が形成された対比例の板材９１を示す正面図である。図４に示すように、板材９１の本体部９２の両側に第１と第２の突き合わせ端面９３、９４のそれぞれから外方に越える第１と第２のクリンチ部９５、９６を設ける場合には、板材９１の本体部９２の長さは、実施形態の場合に比べて、第１のクリンチ部９５の突出部分９５ａのΔＬだけ長くなる。第１のクリンチ部９５の突出部分９５ａは、第２のクリンチ部９６と嵌り合った状態において抜け防止の機能を発揮する部位ではない。したがって、対比例の板材９１は、第１のクリンチ部９５の突出部分９５ａの存在によって、クリンチ部９５、９６を形成するときの材料歩留りが悪い。この結果、材料費の低減を図ることができない。 FIG. 4 is a front view showing a proportional plate material 91 in which a clinch portion having a low material yield is formed. As shown in FIG. 4, when the first and second clinch portions 95 and 96 extending outward from the first and second butted end surfaces 93 and 94 on both sides of the main body portion 92 of the plate material 91 are provided. The length of the main body 92 of the plate 91 is longer by ΔL of the protruding portion 95a of the first clinch portion 95 than in the case of the embodiment. The protruding portion 95a of the first clinching portion 95 is not a portion that exhibits a function of preventing the removal in a state where the protruding portion 95a is fitted to the second clinching portion 96. Therefore, the proportional plate member 91 has a poor material yield when forming the clinch portions 95 and 96 due to the presence of the protruding portion 95a of the first clinch portion 95. As a result, the material cost cannot be reduced.
　これに対して、実施形態のカラー部材６０にあっては、第１のクリンチ部７０は、第１の突き合わせ端面６３から外方に越えない。第１のクリンチ部７０の凹所７２内に設けた係止部７３が、第２のクリンチ部８０と嵌り合った状態において抜け防止の機能を十分に発揮する。したがって、本実施形態の板材６１は、クリンチ部７０、８０を形成するときの材料歩留りが優れたものとなる。この結果、材料歩留りを高めて材料費の低減を図ることができ、カラー部材６０のさらなるコスト低減を図ることができる。ひいては、このカラー部材６０を適用した部品（例えば、トレーリングアーム２０）の低コスト化に寄与することが可能となる。 On the other hand, in the collar member 60 of the embodiment, the first clinching portion 70 does not extend outward from the first butted end surface 63. The locking portion 73 provided in the recess 72 of the first clinching portion 70 sufficiently exhibits the function of preventing the removal in a state where the locking portion 73 is fitted to the second clinching portion 80. Therefore, the plate material 61 of this embodiment has excellent material yield when the clinch portions 70 and 80 are formed. As a result, the material yield can be increased to reduce the material cost, and the cost of the collar member 60 can be further reduced. As a result, it is possible to contribute to cost reduction of a component (for example, the trailing arm 20) to which the collar member 60 is applied.
　比較的薄肉の板材から中空円筒部材を形成する場合には、ロール成形することによって、板材の第１と第２の突き合わせ端面同士を端面に沿う方向（中空円筒部材の径方向）から重ね合わせることはできる。しかしながら、強い剛性が必要とされるカラー部材６０では比較的厚肉の板材６１を用いることから、ロール成形を適用することは難しい。この場合には、プレス成形することによって、第１と第２の突き合わせ端面６３、６４同士を周方向から突き合わせている。第１と第２の突き合わせ端面６３、６４同士を周方向から突き合わせるときに、凸片８１を挿入口７１から凹所７２に挿入させている。プレス成形によって板材６１を周方向に曲げ加工していることから、板材６１の本体部６２はもちろんのこと、凸片８１にも直線部が残留することがない。この結果、カラー部材６０の真円度を高めることが可能となる。 When the hollow cylindrical member is formed from a relatively thin plate material, the first and second butted end surfaces of the plate material are overlapped from the direction along the end surface (the radial direction of the hollow cylindrical member) by roll forming. I can. However, since the relatively thick plate 61 is used in the collar member 60 that requires strong rigidity, it is difficult to apply roll forming. In this case, the first and second butted end surfaces 63 and 64 are butted from the circumferential direction by press molding. When the first and second butted end surfaces 63 and 64 are butted from the circumferential direction, the convex piece 81 is inserted into the recess 72 from the insertion port 71. Since the plate material 61 is bent in the circumferential direction by press molding, the straight portion does not remain on the convex piece 81 as well as the main body portion 62 of the plate material 61. As a result, the roundness of the collar member 60 can be increased.
　次に、図５（Ａ）～図５（Ｆ）を参照して、プレス成形によって板材６１を周方向に曲げ加工する手順について概説する。 Next, the procedure for bending the plate material 61 in the circumferential direction by press molding will be outlined with reference to FIGS. 5 (A) to 5 (F).
　カラー部材６０の製造に使用される成形型は、予備成形用の第１と第２の成形型１１０、１２０（図５（Ａ）（Ｂ））と、予備成形された板材６１を円弧状に折り曲げる折り曲げ用の第１～第３の成形型１３０、１４０、１５０（図５（Ｃ）（Ｄ）（Ｅ））と、リストライク用の成形型１６０（図５（Ｆ））と、を有している。これらの図面では、板材６１の送り方向に交差する断面で成形型を示している。 The molds used for manufacturing the color member 60 are pre-molded first and second molds 110 and 120 (FIGS. 5A and 5B) and a preformed plate material 61 in an arc shape. First to third bending molds 130, 140, and 150 (FIGS. 5C, 5D, and 5E) for folding, and a wrist mold 160 (FIG. 5F) are provided. is doing. In these drawings, the mold is shown in a cross section that intersects the feeding direction of the plate material 61.
　図示しないプレス装置によって、板材６１の本体部６２の一端部側には第１のクリンチ部７０が設けられ、他端部側には第２のクリンチ部８０が設けられている。 A first clinching part 70 is provided on one end side of the main body 62 of the plate member 61 and a second clinching part 80 is provided on the other end side by a pressing device (not shown).
　図５（Ａ）に示すように、予備成形用の第１成形型１１０は、上下一対の型１１１、１１２を備えている。上型１１１の凸部１１３と下型１１２の凹部１１４とによって、板材６１の送り方向に交差する方向での板材６１の中央部と両側縁部とを競り上げる予備成形工程を行う。 As shown in FIG. 5A, the first molding die 110 for preforming includes a pair of upper and lower dies 111 and 112. A pre-molding step is performed in which the central portion and both side edge portions of the plate material 61 in the direction intersecting the feeding direction of the plate material 61 are competed by the convex portion 113 of the upper die 111 and the concave portion 114 of the lower die 112.
　図５（Ｂ）に示すように、予備成形用の第２成形型１２０は、上下一対の型１２１、１２２を備えている。上型１２１の凸部１２３と下型１２２の凹部１２４とによって、板材６１の送り方向に交差する方向での板材６１の両側縁部をさらに競り上げる予備成形工程を行う。第２成形型１２０には、下型１２２の中央部分に、バネ部材１２５により付勢されたポンチ部材１２６が設けられている。加圧時にポンチ部材１２６が下型１２２の型面よりさらに下降し、板材６１の中央部分が円弧状に成形され易いようにしている。 As shown in FIG. 5B, the second molding die 120 for preforming includes a pair of upper and lower dies 121, 122. A preforming step is performed in which the convex portions 123 of the upper mold 121 and the concave portions 124 of the lower mold 122 further abut both side edges of the plate material 61 in the direction intersecting the feeding direction of the plate material 61. The second mold 120 is provided with a punch member 126 urged by a spring member 125 at the central portion of the lower mold 122. At the time of pressurization, the punch member 126 is further lowered from the mold surface of the lower mold 122 so that the central portion of the plate material 61 is easily formed into an arc shape.
　図５（Ｃ）に示すように、折り曲げ用の第１成形型１３０は、上下一対の型１３１、１３２を備えている。上型１３１の凸部１３３と下型１３２の凹部１３４とによって、前工程で予備成形された板材６１を断面Ｕ字状にする折り曲げ工程を行う。第１成形型１３０にも、下型１３２の中央部分に、バネ部材１３５により付勢されたポンチ部材１３６が設けられている。加圧時にポンチ部材１３６が上型１３１の凸部１３３によって押圧され下型１３２の型面よりさらに下降し、板材６１の中央部分がより円弧状に近付くようにしている。 As shown in FIG. 5 (C), the first forming mold 130 for bending includes a pair of upper and lower molds 131 and 132. A bending step of making the plate material 61 preformed in the previous step into a U-shaped cross section is performed by the convex portion 133 of the upper die 131 and the concave portion 134 of the lower die 132. The first mold 130 is also provided with a punch member 136 urged by a spring member 135 at the center portion of the lower mold 132. At the time of pressurization, the punch member 136 is pressed by the convex portion 133 of the upper mold 131 and is further lowered from the mold surface of the lower mold 132 so that the central portion of the plate material 61 approaches an arc shape.
　図５（Ｄ）に示すように、折り曲げ用の第２成形型１４０は、上下一対の型１４１、１４２を備えている。上型１４１の凸部１４３と下型１４２の凹部１４４とによって、前工程で第１段階の折り曲げ成形された板材６１を円弧状に近付けるように第２段階の折り曲げ工程を行う。第２成形型１４０にも、下型１４２の中央部分に、バネ部材１４５により付勢されたポンチ部材１４６が設けられている。上型１４１の凸部１４３の形状は、板材６１の両側縁部がより円弧状に成形され易いように、下端が板材６１の送り方向に軸線が伸延する円柱状部１４７とされている。 As shown in FIG. 5D, the second forming die 140 for bending includes a pair of upper and lower dies 141 and 142. The second stage bending process is performed so that the plate material 61 formed by the first stage bending in the previous process is brought close to an arc shape by the convex part 143 of the upper mold 141 and the concave part 144 of the lower mold 142. The second mold 140 is also provided with a punch member 146 urged by a spring member 145 at the central portion of the lower mold 142. The shape of the convex portion 143 of the upper mold 141 is a columnar portion 147 whose axis extends in the feed direction of the plate material 61 so that both side edges of the plate material 61 are more easily formed into an arc shape.
　図５（Ｅ）に示すように、折り曲げ用の第３成形型１５０は、上下一対の型１５１、１５２を備えている。上型１５１には半円状の凹部１５３が設けられ、下型１５２には上型１５１の凹部１５３とともに略円形状をなす凹部１５４が設けられている。両凹部１５３、１５４によって、前工程で第２段階の折り曲げ成形された板材６１を円弧状にさらに近付けるように第３段階の折り曲げ工程を行う。なお、下型１５２の凹部１５４は、第３段階の折り曲げ成形時にその側縁部１５５の上端部分が上型１５１の凹部１５３の口縁部内に僅かに入り込むように構成されている。円形状に近くなった板材６１を外周から締め付け、より円弧状に近付く成形が行われる。 As shown in FIG. 5E, the third molding die 150 for bending includes a pair of upper and lower dies 151 and 152. The upper die 151 is provided with a semicircular recess 153, and the lower die 152 is provided with a substantially circular recess 154 together with the recess 153 of the upper die 151. A third-stage bending process is performed by both concave portions 153 and 154 so that the plate material 61 formed by the second-stage bending in the previous process is brought closer to an arc shape. The concave portion 154 of the lower mold 152 is configured such that the upper end portion of the side edge portion 155 slightly enters the mouth edge portion of the concave portion 153 of the upper mold 151 during the third stage of bending. A plate 61 that is close to a circular shape is tightened from the outer periphery, and molding is performed so as to approach an arc shape.
　図５（Ｆ）に示すように、リストライク用の成形型１６０は、上下一対の型１６１、１６２を備えている。上型１６１には半円状の凹部１６３が設けられ、下型１６２には上型１６１の凹部１６３とともに略円形状をなす凹部１６４が設けられている。両凹部１６３、１６４によって、前工程で第３段階の折り曲げ成形された板材６１を断面円状に仕上げるリストライク工程を行う。 As shown in FIG. 5 (F), the wrist-like mold 160 includes a pair of upper and lower molds 161 and 162. The upper mold 161 is provided with a semicircular recess 163, and the lower mold 162 is provided with a recess 164 that has a substantially circular shape together with the recess 163 of the upper mold 161. By using the concave portions 163 and 164, a re-striking step of finishing the plate material 61 which has been bent and formed in the third stage in the previous step into a circular cross section is performed.
　第３段階の折り曲げ工程およびリストライク工程によって、第２のクリンチ部８０の凸片８１は、第１と第２の突き合わせ端面６３、６４同士を周方向から突き合わせるときに、挿入口７１から凹所７２に挿入されつつ第２の突き合わせ端面６４に沿う方向に塑性変形して、係止部７３に係止される。 The convex piece 81 of the second clinching portion 80 is recessed from the insertion port 71 when the first and second butted end surfaces 63 and 64 are butted together in the circumferential direction by the third-stage bending process and the wrist-like process. While being inserted into the location 72, it is plastically deformed in the direction along the second butting end face 64 and is locked to the locking portion 73.
　以上説明したように、本実施形態によれば、第１のクリンチ部７０は第１の突き合わせ端面６３から外方に越えることなく形成されている。さらに、第２のクリンチ部８０の凸片８１は第１と第２の突き合わせ端面６３、６４同士を周方向から突き合わせるときに、挿入口７１から凹所７２に挿入されつつ第２の突き合わせ端面６４に沿う方向に塑性変形して、係止部７３に係止される。このように第１のクリンチ部７０の凹所７２内に設けた係止部７３が、第２のクリンチ部と嵌り合った状態において抜け防止の機能を十分に発揮する。したがって、板材６１は、クリンチ部７０、８０を形成するときの材料歩留りが優れたものとなる。この結果、材料歩留りを高めて材料費の低減を図ることができ、カラー部材６０のさらなるコスト低減を図ることができる。ひいては、このカラー部材６０を適用した部品（例えば、トレーリングアーム２０）の低コスト化に寄与することが可能となる。 As described above, according to the present embodiment, the first clinch portion 70 is formed so as not to extend outward from the first butted end face 63. Furthermore, the convex piece 81 of the second clinch portion 80 is inserted into the recess 72 from the insertion port 71 when the first and second butted end surfaces 63 and 64 are butted together from the circumferential direction. It is plastically deformed in the direction along 64 and is locked to the locking portion 73. As described above, the locking portion 73 provided in the recess 72 of the first clinching portion 70 sufficiently exhibits the function of preventing the disconnection in a state where it is fitted to the second clinching portion. Therefore, the plate material 61 has excellent material yield when forming the clinch portions 70 and 80. As a result, the material yield can be increased to reduce the material cost, and the cost of the collar member 60 can be further reduced. As a result, it is possible to contribute to cost reduction of a component (for example, the trailing arm 20) to which the collar member 60 is applied.
　第１のクリンチ部７０は、第１の突き合わせ端面６３に沿う方向に対をなして設け、第２のクリンチ部８０は、第２の突き合わせ端面６４に沿う方向に対をなして設けている。対をなす第１のクリンチ部７０のそれぞれの凹所７２は、挿入口７１から本体部６２の内方に向けて伸びる方向ｄが、互いに離反する方向である。かかる構成によれば、第１のクリンチ部７０と第２のクリンチ部８０との嵌り合いが強固となり、第１と第２のクリンチ部７０、８０同士の抜けを抑えて、カラー部材６０における第１と第２の突き合わせ端面６３、６４同士が開いてしまうことを防止することができる。 The first clinch portions 70 are provided in pairs in the direction along the first abutting end surface 63, and the second clinch portions 80 are provided in pairs in the direction along the second abutting end surface 64. In each of the recesses 72 of the pair of first clinch portions 70, directions d extending from the insertion port 71 toward the inside of the main body portion 62 are directions away from each other. According to such a configuration, the fitting between the first clinching part 70 and the second clinching part 80 is strengthened, and the first and second clinching parts 70, 80 are prevented from coming off, and the collar member 60 has the first fitting. It is possible to prevent the first and second butted end surfaces 63 and 64 from opening.
　中空円筒部材として、可動自在な部材を軸支するカラー部材６０に適用したので、可動自在な部材、例えばトレーリングアーム２０の低コスト化に寄与することが可能となる。 Since the hollow cylindrical member is applied to the collar member 60 that pivotally supports a movable member, it is possible to contribute to cost reduction of the movable member, for example, the trailing arm 20.
　なお、本発明は上述した実施形態に限定されるものではなく、適宜改変することができる。例えば、対をなす第１のクリンチ部７０のそれぞれの凹所７２に関して、挿入口７１から本体部６２の内方に向けて伸びる方向ｄが互いに離反する方向である実施形態について説明したが、この場合に限定されるものではない。これとは逆に、対をなす第１のクリンチ部７０のそれぞれの凹所７２に関して、挿入口７１から本体部６２の内方に向けて伸びる方向ｄが互いに接近する方向であってもよい。この場合であっても、上述したのと同様の作用効果を奏する。 In addition, this invention is not limited to embodiment mentioned above, It can modify | change suitably. For example, with respect to the respective recesses 72 of the pair of first clinch portions 70, the embodiment in which the direction d extending from the insertion port 71 toward the inside of the main body portion 62 is a direction away from each other has been described. The case is not limited. On the contrary, with respect to the respective recesses 72 of the paired first clinch portions 70, the direction d extending from the insertion port 71 toward the inside of the main body portion 62 may be a direction in which they approach each other. Even in this case, the same effects as described above can be obtained.
　第１と第２のクリンチ部７０、８０の形状（クリンチ長さ、ラップ代、クリンチ幅、クリンチ数量など）は種々の形状を採用することができ、図示した形状に限定されるものではない。 The shape of the first and second clinch portions 70 and 80 (clinch length, lapping allowance, clinch width, clinch quantity, etc.) can adopt various shapes, and is not limited to the illustrated shapes.
　中空円筒部材としてカラー部材６０に適用した実施形態について説明したが、本発明はこの場合に限定されるものではなく、短冊状の板材６１を曲げ成形することによって形成される中空円筒部材に広く適用可能であることはいうまでもない。 Although the embodiment applied to the collar member 60 as a hollow cylindrical member has been described, the present invention is not limited to this case, and is widely applied to a hollow cylindrical member formed by bending a strip-shaped plate material 61. It goes without saying that it is possible.
１０　　トーションビーム、
２０　　トレーリングアーム（可動自在な部材）、
３０　　ロールバー、
６０　　カラー部材（中空円筒部材）、
６１　　板材、
６２　　本体部、
６３　　第１の突き合わせ端面、
６４　　第２の突き合わせ端面、
６５　　オーバーハング部、
７０　　第１のクリンチ部、
７１　　挿入口、
７２　　凹所、
７３　　係止部、
８０　　第２のクリンチ部、
８１　　凸片、
１００　トーションビーム式サスペンション、
ｄ　　　挿入口から本体部の内方に向けて伸びる方向。 10 Torsion beam,
20 Trailing arm (movable member),
30 roll bar,
60 color member (hollow cylindrical member),
61 Plate material,
62 body,
63 first butted end face,
64 second butted end face,
65 Overhang part,
70 first clinch section,
71 insertion slot,
72 recess,
73 locking part,
80 second clinch section,
81 convex pieces,
100 torsion beam suspension,
d A direction extending from the insertion port toward the inside of the main body.

Claims (3)

  1. 　短冊状の板材を曲げ成形することによって形成される中空円筒部材であって、
    　板材の本体部の一端部側に設けられた第１の突き合わせ端面と、
    　前記本体部の他端部側に設けられ、前記本体部を曲げ成形することによって前記第１の突き合わせ端面に突き合わされて接合される第２の突き合わせ端面と、
    　前記一端部側に設けられた第１のクリンチ部と、
    　前記他端部側に設けられ前記第１のクリンチ部と嵌り合う第２のクリンチ部と、を有し、
    　前記第１のクリンチ部は、
    　　前記第１の突き合わせ端面に挿入口が開口する凹所と、
    　　前記凹所内に設けられ前記第２のクリンチ部を係止する係止部と、を備え、
    　　かつ、前記第１の突き合わせ端面から外方に越えることなく形成され、
    　前記第２のクリンチ部は、
    　　前記第２の突き合わせ端面を越えて外方に突出し、前記第１のクリンチ部の前記凹所に嵌まり合う凸片を備え、
    　前記第２のクリンチ部の前記凸片は、前記第１と第２の突き合わせ端面同士を周方向から突き合わせるときに、前記挿入口から前記凹所に挿入されつつ前記第２の突き合わせ端面に沿う方向に塑性変形して、前記係止部に係止される、中空円筒部材。     A hollow cylindrical member formed by bending a strip-shaped plate material,
    A first butted end face provided on one end side of the main body of the plate material;
    A second butted end face that is provided on the other end side of the main body and is joined by being butted against the first butted end face by bending the main body;
    A first clinch portion provided on the one end side;
    A second clinch portion that is provided on the other end portion side and fits with the first clinch portion;
    The first clinch portion is
    A recess in which an insertion port opens in the first butted end face;
    A locking portion provided in the recess for locking the second clinch portion,
    And formed without going outward from the first butted end face,
    The second clinch portion is
    A protruding piece that protrudes outward beyond the second butted end face and fits into the recess of the first clinch portion;
    The convex piece of the second clinching portion extends along the second butted end surface while being inserted into the recess from the insertion port when the first and second butted end surfaces are butted from the circumferential direction. A hollow cylindrical member that is plastically deformed in the direction and is locked to the locking portion.
  2. 　前記第１のクリンチ部は、前記第１の突き合わせ端面に沿う方向に対をなして設けられ、
    　前記第２のクリンチ部は、前記第２の突き合わせ端面に沿う方向に対をなして設けられ、
    　対をなす前記第１のクリンチ部のそれぞれの前記凹所は、前記挿入口から前記本体部の内方に向けて伸びる方向が、互いに離反する方向あるいは互いに接近する方向である、請求項１に記載の中空円筒部材。     The first clinch portions are provided in pairs in a direction along the first butt end surface,
    The second clinch portions are provided in pairs in a direction along the second butt end surface,
    In each of the recesses of the pair of first clinch portions, the direction extending from the insertion port toward the inside of the main body portion is a direction away from each other or a direction approaching each other. The hollow cylindrical member described.
  3. 　可動自在な部材を軸支するカラー部材に適用されてなる請求項１または請求項２に記載の中空円筒部材。 3. The hollow cylindrical member according to claim 1, wherein the hollow cylindrical member is applied to a collar member that pivotally supports a movable member.
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CN110385953A (en) * 2019-07-31 2019-10-29 天人汽车底盘（芜湖）股份有限公司 The high-intensitive torsion beam of plate shaping
FR3144096A1 (en) * 2022-12-22 2024-06-28 Renault S.A.S axle with closed profile crossmember.

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