Patent application number | Description | Published |
20090084470 | REDUCED-PRESSURE HEAT TREATMENT JIG AND REDUCED-PRESSURE HEAT TREATMENT METHOD - A reduced-pressure heat treatment jig is used for supporting a workpiece of iron when the workpiece is subjected to heat treatment in a reduced-pressure atmosphere in which pressure is reduced compared to atmospheric pressure. The jig is formed of an iron material and is formed with a film on at least a contact surface with the workpiece, the film being formed of a material which persists during the heat treatment. The film preferably includes a metal oxide having an evaporating temperature higher than the heat treatment temperature in the reduced-pressure atmosphere. The film preferably contains aluminum oxide. | 04-02-2009 |
20110302769 | METHOD OF MANUFACTURING STATOR - A method of manufacturing a stator includes forming a stator by assembling segment cores, formed by dividing a stator core in a circumferential direction at a formation position of a slot of the stator core, to a coil conductor that is formed of a rectangular wire bent to include linear portions arranged in the slot and bridge portions that alternately connect the linear portions on one end and the other end of the coil conductor such that the linear portions can be arranged side by side on an imaginary circumference, and fitting a heated outer peripheral ring to an outer periphery of the segment cores. The method also includes reheating the stator at a predetermined temperature in a state where a circularity of the stator is corrected by restraining the outer peripheral ring in the stator to improve the circularity of the stator. | 12-15-2011 |
20130223945 | ROTATION PROCESSING MACHINE - A rotation processing machine includes a rotating device supporting a cylindrical workpiece via a rotation support jig; a processing device on which a cutting tool is mounted; and a turning loader that has grippers arranged about a turning central axis and that turns so that the grippers sequentially face the rotating device. The grippers are configured to individually move up and down, and a height position of each gripper is settable to a first height position where the gripper delivers and receives the cylindrical workpiece to and from the rotating device, and a second height position where the gripper delivers and receives the rotation support jig to and from the rotating device. The turning loader turns each of the grippers between an external delivery/reception position where the gripper faces an external transfer stand and an internal delivery/reception position where the gripper faces the rotating device, and is configured to set the gripper to the first or second height position at one of the external delivery/reception position and the internal delivery/reception position, and to turn the gripper to the other delivery/reception position while holding the gripper at the set height position. | 08-29-2013 |
20130225379 | ROTATION PROCESSING MACHINE AND ROTATION PROCESSING METHOD - A rotation processing machine, including a rotating device that holds and rotates a workpiece; a processing device on which a cutting tool is mounted to process the workpiece; and a turning loader that has grippers arranged about a turning central axis, and that turns so that the grippers sequentially face the rotating device. The turning loader is configured to deliver and receive the workpiece to and from the rotating device by turning with the workpiece being directly or indirectly held by the gripper, and to deliver and receive the cutting tool to and from the processing device by turning with the cutting tool being directly or indirectly held by the gripper. | 08-29-2013 |
Patent application number | Description | Published |
20110232076 | LAMINATED CORE PUNCHING APPARATUS - A laminated core punching apparatus, configured such that a stator-punching press machine that has a molding die performing a partial punching gradually approaches the shape of the stator core piece. There is a punching die to punching out the stator core piece from a strip-form steel plate, and two stator lamination stations. A rotor-punching press machine and a stator-punching press machine are constructed to operate synchronously. An intermediate loop portion capable of causing a strip-form steel plate to hang down in a loop is provided in order to adjust a length of the strip-form steel plate between the two press machines, and a loop guide portion that guides a loop locus of the strip-form steel plate from above so that the strip-form steel plate does not invert is disposed above the intermediate loop portion to be capable of ascending and descending. | 09-29-2011 |
20120247249 | Gears and its process of manufacture - A method of manufacturing a gear, and the resulting gear, the method resulting such that the surface layer portions of the tooth portions and a tooth root portion are made to be a carburized layer, the remaining portion of the tooth portions and a portion of a disk portion lying below the carburized layer be a quench-hardened layer, and a region of the disk portion lying deeper than the quench-hardened layer be an unquenched layer. The gear is manufactured using raw material steel having the following chemical composition: C: 0.1% to 0.40% (% by mass), Si: 0.35% to 3.0%, Mn: 0.1% to 3.0%, Cr: less than 0.2%, Mo: 0.1% or less, P: 0.03% or less, S: 0.15% or less, Al: 0.05% or less, N: 0.03% or less, and Fe and unavoidable impurities. | 10-04-2012 |
20120247619 | Carburized steel and its process of manufacture - A carburized steel member is manufactured by specific carburizing, cooling, and quenching steps. The steel member contains: C: 0.1% to 0.4%, Si: 0.35% to 3.0%, Mn: 0.1% to 3.0%, P: 0.03% or less, S: 0.15% or less, Al: 0.05% or less, and N: 0.03% or less, and a content of Cr is less than 0.2%, a content of Mo is 0.1% or less, and remainder is constituted of Fe and unavoidable impurities. A surface layer thereof includes: a first layer having a carbon concentration of 0.60 mass % to 0.85 mass % and including a martensitic structure in which no grain boundary oxide layer caused by Si exists; a second layer having a carbon concentration of 0.1 mass % to 0.4 mass % and including a martensitic structure; and a third layer having a carbon concentration of 0.1 mass % to 0.4 mass % and including no martensitic structure. | 10-04-2012 |