摘要:
An aluminum alloy material comprising 9.0 to 11.0 mass% Si, at most 0.5 mass% Fe, 0.7 to 1.1 mass% Cu, at most 0.15 mass% Mn, 0.3 to 0.7 mass% Mg, a remainder of Al, and unavoidable impurities undergoes a solutionizing treatment. The material is then cold forged. The material subsequently undergoes an artificial aging treatment. A formed material for a brake piston is thereby obtained
摘要:
A convex type bottom with a bearing rim for bottles for industrial gases, obtained by hotforging a steel billet, has the lower outer surface consisting of a central circular flat area (2), a first frustoconical annular area adjacent the central area (2), inclined upwards, a second frustoconical annular area adjacent the first frustoconical annular area, inclined downwards, and a subvertical frustoconical area (6) radiused, on the one side, to the second frustoconical annular area and, on the other side, to the flat surface (7) of the bearing rim (8). Provided on the inclined frustoconical annular areas are corrugations (3, 4, 5). Such a configuration of the bottom permits the defects to be eliminated due to creeping of the material during forging.
摘要:
A method for manufacturing a bearing ring member includes an inversion step of deforming a workpiece having an annular shape by sandwiching the workpiece between a punch disposed on a first side in a predetermined direction and a die disposed on a second side. The punch has a first R surface formed in a circular arc shape. The die has a second R surface formed in a circular arc shape, and a tapered surface inclined with respect to the predetermined direction. The inversion step includes a first step of deforming the workpiece using the punch and the die in a state where the first R surface and the second R surface are in contact with the workpiece, and a second step of deforming the workpiece using the punch and the die in a state where the first R surface and the tapered surface are in contact with the workpiece.
摘要:
A ring molded article manufacturing method capable of reliably and efficiently producing a ring molded article in which dead metal regions are reduced, is provided. In the present invention, a material is processed by first forging so as to be shaped in a shape including a bottom which is formed in a substantially disk shape, and a peripheral wall which is inclined to a direction from a center of the bottom toward an outer periphery thereof, in a direction from the outer periphery of the bottom toward one side in a direction of a center axis of the bottom, the bottom of a first forged article obtained by the first forging is drilled, a drilled article obtained by the drilling is ring-rolled, a ring material obtained by the ring rolling is placed inside two molds, the ring material is then processed by second forging so as to be pressed by the two molds in a direction of a center axis of the ring material, and the ring molded article is thus produced.
摘要:
A convex type bottom with a bearing rim for bottles for industrial gases, obtained by hotforging a steel billet, has the lower outer surface consisting of a central circular flat area (2), a first frustoconical annular area adjacent the central area (2), inclined upwards, a second frustoconical annular area adjacent the first frustoconical annular area, inclined downwards, and a subvertical frustoconical area (6) radiused, on the one side, to the second frustoconical annular area and, on the other side, to the flat surface (7) of the bearing rim (8). Provided on the inclined frustoconical annular areas are corrugations (3, 4, 5). Such a configuration of the bottom permits the defects to be eliminated due to creeping of the material during forging.
摘要:
A punch 1 includes a forming land portion 2 formed in parallel with a punch axis 7, a forming R-portion 3 having an arc-shaped cross-section and formed continuously with the forming land portion 2 on a tip end side with respect to the forming land portion 2, and a recess portion 5 formed on a base end side with respect to the forming land portion 2 and having a diameter smaller than a diameter of the forming land portion 2. A Rockwell hardness HRF of the blank 20 is within a range of 65 to 105. The curvature radius R of the forming R-portion 3 of the punch 1 is set to be larger than the thickness L of a cylindrical peripheral wall portion 21 of the forged product 25. The length B of the forming land portion 2 of the punch 1 is set within a range of 0.05 to 0.15 mm. The recess width C of the recess portion 5 with respect to the forming land portion 2 of the punch 1 is set within a range of 0.15 to 1.0 mm.
摘要:
A ring molded article manufacturing method capable of reliably and efficiently producing a ring molded article in which dead metal regions are reduced, and a ring material used for producing the ring molded article, are provided. The present invention relates to the method for manufacturing a ring molded article having two convex portions which respectively protrude on both sides of the ring molded article in a direction of a center axis thereof and extend in a direction of a circumeference of the ring molded article. In the manufacturing method, the ring material is placed inside two molds on which concave portions respectively corresponding to the convex portions are formed, in a condition in which the ring material is supported by a region on an outer peripheral side from an outer peripheral side corner in the concave portion of one of the two molds and a region on an inner peripheral side from an inner peripheral side corner in the concave portion of another of the two molds, the ring material is then forged so as to be pressed by the two molds in a direction of a center axis of the ring material, and the ring molded article is thus produced. In addition, the present invention relates to the ring material used for producing the ring molded article.
摘要:
A method for the manufacture of a vessel bottom with a flange includes the following steps: after heating of an ingot to a forming temperature, a preliminary forging (1) in shape of a circular plate having the height (H) and diameter (0) is made by free forging on a forging press; after the second heating to a forming temperature, the preliminary forging (1) is placed on a working plate (4) of a lower swage and the first male die (2) is pushed concentrically into the forging (1) to a depth necessary for the formation of a flattened segment (3); the flattened segment (3) is rotated by 180° and after its location on a machine tool a bellows (7) is formed by mechanical machining, which has in the centre a recess (X) and around the perimeter of the convex region (5) a recess (Y) having the radius (R); after heating, the bellows (7) is placed on a pre-prepared set of tools for the pressing via the convex part (5) upwards on a forming ring (8); the main male die (10) is pushed concentrically into the bellows (7) for pressing the bottom (11) by means of a reverse drawing, the bottom (11) being equipped with an external flange (6).