Abstract: The present invention is directed to a forging method for forming a heat sink 9 including a base board 91 and a plurality of pin fins 92 integrally formed on an upper surface of the base board 91. A back pressure applying pin 75 of a forging die for forming pin fins 92 are slidably arranged in a fin-forming hole 52. At the time of plastically deforming a forging blank W, a back pressure is applied by the back pressure applying pin to a metal material of the forging blank W flowed into the fin-forming hole 52. A concave portion 76 is formed on the restraining tip end face of the back pressure applying pin 75 for restraining the metal material, and a joining convex portion 93 is integrally formed on a tip end of the pin fin 92 by the metal material filled in the concave portion 76.

Abstract: A bumper beam of the present invention is provided with a tubular bumper reinforcement member (1) and a tubular crush box (2). A reinforcement member hole (15) is provided in an outer peripheral wall (11) of the bumper reinforcement member (1) in a penetrated manner. A partition wall (22) is provided so as to bridge opposed inner wall surfaces of an outer peripheral wall (21) of the crush box (2). The tip end portion of the crush box (2) is arranged so as to penetrate the reinforcement hole (15). In this state, ridge portions (25a, 25b) are formed, by means of a tube expansion process using a tube expansion die, on the crush box (2) so as to extend in a circumferential direction thereof at a front side and a rear side of the reinforcement hole (15). With this, the crush box (2) is secured to the bumper reinforcement member (1). According to the present invention, the bumper beam can be reduced in size and weight.

Abstract: The present invention is directed to a forging method for forming a heat sink 9 including a base board 91 and a plurality of pin fins 92 integrally formed on an upper surface of the base board 91. A back pressure applying pin 75 of a forging die for forming pin fins 92 are slidably arranged in a fin-forming hole 52. At the time of plastically deforming a forging blank W, a back pressure is applied by the back pressure applying pin to a metal material of the forging blank W flowed into the fin-forming hole 52. A concave portion 76 is formed on the restraining tip end face of the back pressure applying pin 75 for restraining the metal material, and a joining convex portion 93 is integrally formed on a tip end of the pin fin 92 by the metal material filled in the concave portion 76.

Abstract: A bumper beam of the present invention is provided with a tubular bumper reinforcement member (1) and a tubular crush box (2). A reinforcement member hole (15) is provided in an outer peripheral wall (11) of the bumper reinforcement member (1) in a penetrated manner. A partition wall (22) is provided so as to bridge opposed inner wall surfaces of an outer peripheral wall (21) of the crush box (2). The tip end portion of the crush box (2) is arranged so as to penetrate the reinforcement hole (15). In this state, ridge portions (25a, 25b) are formed, by means of a tube expansion process using a tube expansion die, on the crush box (2) so as to extend in a circumferential direction thereof at a front side and a rear side of the reinforcement hole (15). With this, the crush box (2) is secured to the bumper reinforcement member (1). According to the present invention, the bumper beam can be reduced in size and weight.

Abstract: The present invention relates to a bumper reinforcement for vehicles having a fixing portion 11 to be fixed to a vehicle structural member at a part of the bumper reinforcement in a longitudinal direction. The bumper reinforcement is constituted by an integrally molded product obtained by deforming a hollow extruded product by plastic working. When the fixing portion 11 and vicinities thereof is defined as a reinforced portion 1, light-weighted portion 21s and 22 smaller in second moment of area and cross-sectional area than the reinforced portion 1 are provided at least part of a non-reinforced portion constituted by a portion other than the reinforced portion. This makes it possible to decrease the number of parts and trim the weight while securing strength.

Abstract: The present invention relates to a bumper reinforcement for vehicles having a fixing portion 11 to be fixed to a vehicle structural member at a part of the bumper reinforcement in a longitudinal direction. The bumper reinforcement is constituted by an integrally molded product obtained by deforming a hollow extruded product by plastic working. When the fixing portion 11 and vicinities thereof is defined as a reinforced portion 1, light-weighted portion 21s and 22 smaller in second moment of area and cross-sectional area than the reinforced portion 1 are provided at least part of a non-reinforced portion constituted by a portion other than the reinforced portion. This makes it possible to decrease the number of parts and trim the weight while securing strength.

Abstract: The present invention relates to a link member for a vehicle having bracket portions at both ends and an intermediate connecting both bracket portions and arranged at an intermediate portion. The link member for a vehicle is constituted by an integrally formed product formed by deforming a pipe-shaped workpiece W1 by plastic working. The intermediate connecting portion is provided with an intermediate shaft portion 3 having a diameter smaller that that of the bracket portion 2, and a thickness of a peripheral wall of the bracket portion 2 is different from that of a peripheral wall of the intermediate shaft portion 3. This increases strength and durability of the link member.

Abstract: A connection structure for hollow members, which is highly durable and can be produced at low cost, is provided. An insertion hole 12 is formed in at least one wall portion 11 of a pair of opposed wall portions 11 and 11 of a first hollow member 10. A sleeve 30 for preventing biting of a peripheral edge portion 12a of the insertion hole 12 into the outer peripheral surface of a second hollow member 20 is fixed to the first hollow member 10 with the sleeve 30 inserted in the insertion hole 12. A peripheral wall portion 22 of the second hollow member 20 inserted in the sleeve 30 is expanded with the second hollow member 20 inserted in the sleeve 30, so that the peripheral wall portion 22 of the inserted portion of the second hollow member 20 is pressed against and fixed to the inner peripheral surface of the sleeve 30.

Abstract: A steering support beam 1 includes a cylindrical support beam body 2 and a plurality of brackets 10, 13, 20, 23 and 26 each having a fitting portion fitted on the cylindrical support beam body 2 and fixed thereto. The fitting portion of at least one of the brackets 20 is fixed to the support beam body 2 in a state in which the fitting portion of at least one of the brackets 20 is positioned with respect to the support beam 2 by being interposed by an outer pipe 3 fitted on the support beam 2 between the fitting portion of at least one of the brackets 20 and the fitting portion of the other bracket 10.

Abstract: The mounting component for a cylindrical bushing is comprised of a mounting portion for a bushing into which a cylindrical bushing can be fitted. The mounting portion for a bushing is a clamping-type mounting portion, comprised of a receptacle and a cover that is separate from the receptacle, and the aforementioned cylindrical bushing is inserted and clamped between them. The aforementioned receptacle is comprised of a hollow holder with an arcuate cross section that holds the aforementioned cylindrical bushing. On the holder, two protruding joints are provided. The aforementioned cover is comprised of a hollow holder with an arcuate cross section that holds the aforementioned cylindrical bushing. On the holder, joints corresponding to the joints of the aforementioned receptacle are provided.

Abstract: A bracket made of an aluminum alloy for fixing an elastic mount to one of two members to be elastically connected to each other through the elastic mount interposed therebetween. The bracket is formed by extrusion, and has at least one aperture formed therethrough so as to extend in the direction of extrusion. A first succession of recessed and raised portions are formed on at least a part of a fixing surface that is fixable to the elastic mount, and a second succession of recessed and raised portions are formed on at least a part of an exposed surface thereof which is exposed to the atmosphere upon fixing of the bracket to the elastic mount. The recessed and raised portions extend in the direction of extrusion, and are formed alternately in a direction perpendicular to the direction of extension.

Abstract: The mounting component for a cylindrical bushing is comprised of a holder into which a cylindrical bushing can be fitted. An opening is formed at one location in a circumference direction of the holder such that the opening extends in an axial direction. At the opening, the holder can be opened in an expanding manner. When the opening is closed, the inner circumference surface of the holder is tightly attached to the outer circumference surface of the bushings to effect a clamping fastening method wherein the bushing is fitted and fixed inside the holder. Joints are provided on the two opening edges, or in their vicinity, of the aforementioned opening, in such a way that the joints protrude toward the outer circumference surface, These joints are bonded by a coupling structure using plastic deformation, and thus maintain the opening in a closed state.