Abstract: A die set for bending a metal plate workpiece includes a lower die for placing the workpiece, an upper die having a pressing surface which presses the workpiece toward the lower die by movement, a lower movable part provided in the lower die and being slidable in the same direction as the direction of the upper die movement, and a gas spring elastically supporting the lower movable part from below. The pressing surface of the upper die is moved, contacts with the upper surface of the workpiece and presses the workpiece toward the lower die. The lower movable part being elastically supported by the gas spring from below brings an opposing surface into contact with the lower surface of the workpiece and makes the upper die to be close to the lower die while applying force in the upward which is opposite direction of the upper die movement.

Abstract: An aluminum composite material includes a first metallic plate, a second metallic plate, and a matrix material that is interposed between the first metallic plate and the second metallic plate and is formed of aluminum powder. Gadolinium oxide particles are dispersed in the matrix material.

Abstract: A battery case provided with a safety valve (4) in which a breakage groove (45) is used, wherein in order to stabilize the operation pressure, a lid (2) of the battery case has formed thereon: a thin plate portion (30) obtained by thinning a plate part (3); and a first recessed part (40) comprising a curved part (44) in which the thin plate portion (30) is indented inward, with respect to the case, in a curved shape. The breakage groove (45) for the safety valve (4) is formed at the bottom part (440) of the curved part (44). A first connecting portion (46) and a second connecting portion (47) of the plate part (3), which connect to the curved part (44) on both sides flanking the curved part (44), are at positions protruding toward the outside of the case from the plate part (3).

Abstract: The present invention provides a bumper reinforcement made of a hollow material, including: a rear wall facing a vehicle body; an upper wall extending forward from a top of the rear wall; a lower wall extending forward from a bottom of the rear wall; a front wall supported only by the upper wall and the lower wall; an upper reinforcing wall extending from a middle in a height direction of the rear wall up to a middle in a front-rear direction of the upper wall; and a lower reinforcing wall extending from the middle in the height direction of the rear wall up to a middle in the front-rear direction of the lower wall, wherein: the front wall is located frontward of a virtual line passing through a foremost of the upper reinforcing wall and a foremost of the lower reinforcing wall in a cross section.

Abstract: A metal-based composite material which has a sufficient radiation absorption function, also has excellent strength, corrosion resistance, processability, impact resistance and heat conductivity, and is inexpensive. A metal-based composite material having such a double-clad structure that a core material is sandwiched between a pair of skin materials each composed of an aluminum plate in such a manner that the core material is closely adhered to the skin materials, wherein the core material comprises a matrix produced by consolidating an aluminum powder by applying a pressure and tungsten particles dispersed in the matrix, and wherein the tungsten particles are contained in the core material in an amount of 5 to 70 vol %. A method for producing a metal-based composite material, which comprises filling a mixed powder of an aluminum powder that constitutes a matrix and tungsten particles into an aluminum case and then extending the mixed powder by applying a pressure.

Abstract: A powder alloy rolling case (1) includes a side face configuring member (10) formed like a rectangular frame with two members (10a, 10a) combined, and surrounding side faces of metal powder (2); an upper lid configuring member (11) provided to cover one opening of the side face configuring member (10), and covering an upper face of the metal powder; and a lower lid configuring member (12) provided to cover the other opening of the side face configuring member (10), and covering a lower face of the metal powder (2), wherein joints (10b, 10b) between the members (10a, 10a) configuring member (10) are provided in opposing two side faces out of four side faces of the side face configuring member (10).

Abstract: An object of this invention is to provide a case for rolling powder alloy without failures at the time of rolling. The case for rolling powder alloy (1) is formed like a shape of box and comprises a side constituent member (10) forming like a rectangular frame in a combination of two members (10a, 10a) and surrounding a side surface of metal powder, an upper lid constituent member (11) mounting on one opening of the side constituent member (10) and covering an upper surface of the metal powder, and a lower lid constituent member (12) mounting on the other opening of the side constituent member (10) and covering a lower surface of the metal powder. The peripheral edges of the upper lid constituent member (11) and the lower lid constituent member (12) are, respectively, provided with a peripheral wall (11b, 12b) standing upright along an outer peripheral surface of the side constituent member, and the side constituent member (10) is inserted into a space surrounded by the peripheral wall (11b, 12b).

Abstract: A lightweight bumper structure is achieved without a reduction in the amount of absorption of collision energy. A bumper structure (B1) is provided with a left and right pair of bumper stays (1, 1) fixed to side members (S), and also with a bumper reinforcing member (2) supported by both the bumper stays (1, 1). Each bumper stay (1) is formed in a shape the width of which gradually increases from the side member (S) toward the bumper reinforcing member (2). The bumper reinforcing member (2) is curved between both the bumper stays (1, 1). The rigidity of the bumper stays (1) and the bumper reinforcing member (2) is set so that the bumper stays (1) are crushed in the front-rear direction after the curved portion of the bumper reinforcing member (2) is rectilinearly extended.

Abstract: A method of producing an aluminum matrix composite material is described that comprises the steps of: mixing an aluminum powder and a ceramic powder to prepare a mixed powder; providing a lower casing made of aluminum and formed in a hollow rectangular parallelepiped shape having an open top, and a closing member made of aluminum and formed in a shape adapted to hermetically close the open top of the lower casing; packing the mixed powder into the lower casing; closing the open top of the lower casing filled with the mixed powder, by the closing member, to prepare a pre-rolling assembly having the mixed powder hermetically sealed therein; preheating the pre-rolling assembly; and rolling the preheated assembly to obtain the aluminum matrix composite material, where the aluminum matrix composite material includes a pair of metal plates having the mixed powder therebetween.

Abstract: A method of producing an aluminum matrix composite material is described that comprises the steps of: mixing an aluminum powder and a ceramic powder to prepare a mixed powder; providing a lower casing made of aluminum and formed in a hollow rectangular parallelepiped shape having an open top, and a closing member made of aluminum and formed in a shape adapted to hermetically close the open top of the lower casing; packing the mixed powder into the lower casing; closing the open top of the lower casing filled with the mixed powder, by the closing member, to prepare a pre-rolling assembly having the mixed powder hermetically sealed therein; preheating the pre-rolling assembly; and rolling the preheated assembly to obtain the aluminum matrix composite material, where the aluminum matrix composite material includes a pair of metal plates having the mixed powder therebetween.