Disclosed is a roll spinning forming device for a toothed part. The device is mounted on a machine tool body. A blank, a mandrel and a driving synchromesh gear are mounted on a machine tool spindle. A driven synchromesh gear and a roller are arranged in parallel on the spindle. The driven synchromesh gear and the roller are connected by a telescopic constant speed universal joint and rotate at a same angular speed. The driven synchromesh gear is driven by a spring mechanism in the radial direction, and the roller is driven by a servo motor assembly in the radial direction. Further disclosed is a roll spinning forming method for a toothed part, the rotating speed of the blank is maintained to be matched with the rotating speed of the roller according to a gear ratio during the movement of the roller toward the blank.

A workpiece executes a rotation movement about a longitudinal axis and is machined by a tool in a multitude of reshaping engagements, in which an active region of the tool comes into contact with the machining region. The tool is held by a tool holder. The tool holder is mounted in an orbiting body so as to be rotatable about a rotation axis and is driven to carry out a rotating movement about the rotation axis, and is driven to carry out an orbiting movement by the orbiting body. Rotation movement of the workpiece is synchronised with the orbiting movement of the tool holder and the rotating movement of the first tool holder is synchronised with the orbiting movement of the tool holder.

A workpiece executes a rotation movement about a longitudinal axis and is machined by a tool in a multitude of reshaping engagements, in which an active region of the tool comes into contact with the machining region. The tool is held by a tool holder. The tool holder is mounted in an orbiting body so as to be rotatable about a rotation axis and is driven to carry out a rotating movement about the rotation axis, and is driven to carry out an orbiting movement by the orbiting body. Rotation movement of the workpiece is synchronised with the orbiting movement of the tool holder and the rotating movement of the first tool holder is synchronised with the orbiting movement of the tool holder.

A method of manufacturing a torque-transmitting component includes providing a flat blank to a transfer press having a plurality of stations and performing a plurality of pressing operations, in which the flat blank is formed into a cup shape, rough splines are formed on the cup shape, and the rough splines are further pressed to define smooth splines. The component includes a continuous smooth inner diameter defined by a punch of the transfer press and a plurality of smooth splines defined by a die of the transfer press. The minor diameter of the splines is not machined to form the splines.

A method of manufacturing a torque-transmitting component includes providing a flat blank to a transfer press having a plurality of stations and performing a plurality of pressing operations, in which the flat blank is formed into a cup shape, rough splines are formed on the cup shape, and the rough splines are further pressed to define smooth splines. The component includes a continuous smooth inner diameter defined by a punch of the transfer press and a plurality of smooth splines defined by a die of the transfer press. The minor diameter of the splines is not machined to form the splines.

A drive plate having a plate portion and a ring portion is shaped integrally by pressing using dies. The ring gear portion has inner recessed portions positioned on the inner side of a plurality of outer teeth. The inner peripheral surface of each of the inner recessed portions includes an inner bottom surface having a pair of curved corner surfaces, a pair of first side surfaces inclined so as to become closer to each other as the first side surfaces extend from the opening end of the inner recessed portion toward the inner bottom surface, and a pair of second side surfaces formed in a band shape between the corner surfaces and the first side surfaces. The degree of inclination of the second side surfaces with respect to a center line is smaller than the degree of inclination of the first side surfaces with respect to the center line.

While a compression part (B1) in a bottom wall part of a cup-shaped workpiece (B) is compressed by an inner punch (11) and an inner die (14) and moved in a direction to get away from an intermediate die (15), the inner die (14) is pushed toward the inner punch (11); and a compression part (B2) being an outer end portion in a radial direction of the workpiece (B) is compressed by an outer punch (13) and an outer die (16) and moved in an direction to approach the intermediate die (15), to thereby suppress the workpiece (B) in the compression part (B2) from material-flowing in a direction to get away from a central axis (10), whereby thickness reduction processing of the compression part (B1) and thickness increase processing of a vertical wall part (B3) of the workpiece (B) sandwiched by an intermediate punch (12) and the inner die (15) and a vertical wall part (B4) of the workpiece (B) sandwiched by the intermediate punch (12) and an outer die (16) are performed.

A form rolling apparatus for applying in-feed form rolling to a rod-shaped material includes a support portion configured to support the rod-shaped material to be axially rotatable, a round die formed with die teeth on an outer periphery thereof, the die teeth configured to be positioned facing an outer periphery surface of the rod-shaped material, and a moving device moving the round die so that a distance of axes of the round die and the rod-shaped material changes. The die teeth includes forming die teeth for generating gear teeth on the outer periphery surface of the rod-shaped material and finishing die teeth enhancing a tooth surface precision of the generated gear teeth by engaging with the generated gear tooth and rotating. The finishing die teeth are formed in a configuration each having an addendum that does not come to contact a bottom land of the generated gear teeth.

A tolerance ring is arranged between an output-side rotary shaft and a rotor shaft. For this reason, even when looseness in a spline fitting portion of the output-side rotary shaft and rotor shaft is not filled, both the output-side rotary shaft and the rotor shaft are held by the tolerance ring so as not to rattle. Therefore, it is possible to reduce tooth hammer noise that occurs in the spline fitting portion.

A stamping press includes a first body (200) and a second body (100,300), at least one of them having axial movement, the first body have a third body (255) with controlled rotary movement capability, and the second body have a fifth body (115,350) that also has rotary movement, the third body (255) and the fifth body (115,350) rotary movements as well as the axial movements from the first body (200) and the second body (100,300) are independent with respect to each other.