Abstract:
A welded hollow gear ring (160, 260, 360, 460, 560) with an outer (140, 240, 340) and an inner (155, 255, 355) periphery, which exhibits a gear structure (131-138, 231-238, 331-338, 331'-338') on at least one periphery, as well as exhibiting at least one welding joint (151, 251, 351, 451, 551) which has been formed by flash butt welding. The gear structure is formed by rolling, machining, or by a combination of machining and rolling. The gear structure can comprise cogs or helical gears.
Abstract:
PROBLEM TO BE SOLVED: To provide a cup-shaped part having an inexpensive inner peripheral recess-projection part for securing necessary strength.SOLUTION: The cup-shaped part 1 having the inner peripheral recess-projection part 210 has a bottom part 11, a cylindrical part 2 erected from the outer periphery of the bottom part 11, and the inner peripheral recess-projection part 210. The inner peripheral recess-projection part 210 has a plurality of inner peripheral projection parts 211 formed by projecting toward the inside in the radial direction of the cylindrical part 2 along the axial direction of the cylindrical part 2 in an inner peripheral surface 21 of the cylindrical part 2, and inner peripheral recess parts 212 each formed between the adjacent inner peripheral projection parts 211. Outer peripheral recess parts 221 of recessing the outer peripheral surface 22 toward the inside in the radial direction of the cylindrical part 2 in positions corresponding to the inner peripheral projection parts 211, are arranged on the base end part 231 side for arranging the bottom part 11 in the outer peripheral surface 22 of the cylindrical part 2. A smooth outer peripheral part 224 of not forming the outer peripheral recess part 221 is formed on the opposite opening end part 232 side of the side for arranging the bottom part 11 in the outer peripheral surface 22 of the cylindrical part 2.
Abstract:
PROBLEM TO BE SOLVED: To provide a drive plate allowing to satisfy both of a hardened tooth-shaped portion and reduced manufacturing cost, and a manufacturing method for the same.SOLUTION: A drive plate includes a disk-shaped plate portion 10; and a tooth-shaped portion 2 formed at an outer peripheral end of the plate portion 10. The plate portion 10 and the tooth-shaped portion 2 are integrally shaped from a single steel plate material. The plate portion 10 and the tooth-shaped portion 2 include carburized layers 15, 25 provided over an entire surface layers of the plate portion and the tooth-shaped portion, the carburized layer having a carbon concentration higher than that of a thickness-direction center portion of the plate portion and the tooth-shaped portion. The carburized layer 15 of the plate portion 10 is higher in hardness than the center portion 17 of the plate portion in the thickness direction. The carburized layer 25 of the tooth-shaped portion 2 has been subjected to a quenching process, and is further higher in hardness than the carburized layer 15 of the plate portion 10. The carbon concentration in center portions 17 and 27 of the plate portion 10 and the tooth-shaped portion 2 in the thickness direction is 0.2 mass% or less and the carbon concentration of the carburized layers 15 and 25 exceeds 0.2 mass%.
Abstract:
PROBLEM TO BE SOLVED: To provide a device and a method for influencing a cut functional end, especially purposefully influencing rollover, during the production of a finished member, for example, a gear, making it possible to purposefully influence or totally eliminate the rollover, while simultaneously maintaining the functional surface and saving material. SOLUTION: The problem is solved by cutting out the blank with a defined material allowance relative to the contour of the finished member, at least in the area of the rollover, whose size is adjusted at the first working stage to a material volume that fills up, compensates or exceeds the volume deficit occurring due to the rollover to a preset value and by subsequently during a second working stage shifting this material volume in a forming process opposite the cutting direction of the first working stage on the cutting line of the blank to purposefully fill up the developed rollover. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
A roll-forming process for producing longitudinally toothed profiled bodies in a pot-shaped cylindrical workpiece in which, during a first rolling process (A), the pot-shaped cylindrical workpiece (1) is moved through a first rolling stage with a bottom (3) of the workpiece being rolled first. During at least one further rolling process (B, C), the workpiece (1) passes through at least one further rolling stage with an open end of the workpiece being rolled first.