Abstract: A fracture surface inspection device for inspecting a first fracture surface and a second fracture surface that are generated through fracture splitting, which is provided with a data acquisition unit configured to acquire two-dimensional data and three-dimensional data on each of the fracture surfaces, a contour extraction unit configured to extract, from the two-dimensional data, a first contour of the first fracture surface and a second contour of the second fracture surface, a transformation amount calculation unit configured to calculate a transformation amount X(affine) when the second contour is affine-transformed to the first contour, a distortion correction unit configured to calculate distortion correction data by affine-transforming the three-dimensional data on the second fracture surface with the transformation amount X(affine), and a comparison unit configured to compare the three-dimensional data on the first fracture surface and the distortion correction data.

Abstract: A method of forming a fracture start portion of a con rod for forming fracture start portions of a con rod at opposing positions in an inner peripheral surface of a large end of the con rod made of metal, includes a first step of forming a groove portion at a position corresponding to the fracture start portion by using a first insert tip with a large tip end and a second step of forming the fracture start portion, which has become a V-shaped groove, by machining a bottom portion of the groove portion smaller by using a second insert tip having a tip end smaller than the first insert tip.

Abstract: Provided are: an Mg—Si system thermoelectric conversion material which exhibits stably high thermoelectric conversion performance; a sintered body for thermoelectric conversion, which uses this Mg—Si system thermoelectric conversion material; a thermoelectric conversion element having excellent durability; and a thermoelectric conversion module. A method for producing an Mg—Si system thermoelectric conversion material according to the present invention comprises a step for heating and melting a starting material composition that contains Mg, Si, Sb and Zn. It is preferable that the contents of Sb and Zn in the starting material composition are respectively 0.1-3.0 at % in terms of atomic weight ratio.

Abstract: A method of forming a fracture start portion of a con rod for forming fracture start portions of a con rod at opposing positions in an inner peripheral surface of a large end of the con rod made of metal, includes a first step of forming a groove portion at a position corresponding to the fracture start portion by using a first insert tip with a large tip end and a second step of forming the fracture start portion, which has become a V-shaped groove, by machining a bottom portion of the groove portion smaller by using a second insert tip having a tip end smaller than the first insert tip.

Abstract: A hydraulic system includes position sensors that are provided together with solenoid valves in fluid passages extending between a working fluid source and hydraulic actuators. Each position sensor is comprised of two gears disposed in the fluid passage so as to be rotatable by the flow of working fluid, and two sensing elements each disposed to face either one of the gears. A controller determines the operating position of each actuator based on sensor outputs that are out of phase with each other and are generated by the sensing elements each time the gears rotate for a predetermined angle.

Abstract: A connecting rod fracture machine is disclosed which mateably inserts a half-split type mandrel into an opening of a large end portion of a connecting rod to expand the opening. The machine comprises first and second support members (31), (32) for supporting the connecting rod horizontally, the support members being arranged movably apart from each other on the base of a pallet (24) for placing the connecting rod (1) thereon. Moreover, the machine includes a half-split type mandrel (36), vertically provided on these support members, comprising mandrel half portions (37), (38) with each outer peripheral surface thereof being in contact with the inner surface of the opening. The machine also comprises a wedge (53) for separating the mandrel half portions uniformly apart from each other, the wedge having tapered surfaces in contact with opposite edge surfaces of the mandrel half portions.

Abstract: A hydraulic system includes position sensors that are provided together with solenoid valves in fluid passages extending between a working fluid source and hydraulic actuators. Each position sensor is comprised of two gears disposed in the fluid passage so as to be rotatable by the flow of working fluid, and two sensing elements each disposed to face either one of the gears. A controller determines the operating position of each actuator based on sensor outputs that are out of phase with each other and are generated by the sensing elements each time the gears rotate for a predetermined angle.

Abstract: A connecting rod fracture machine is disclosed which mateably inserts a half-split type mandrel into an opening of a large end portion of a connecting rod to expand the opening. The machine comprises first and second support members (31), (32) for supporting the connecting rod horizontally, the support members being arranged movably apart from each other on the base of a pallet (24) for placing the connecting rod (1) thereon. Moreover, the machine includes a half-split type mandrel (36), vertically provided on these support members, comprising mandrel half portions (37), (38) with each outer peripheral surface thereof being in contact with the inner surface of the opening. The machine also comprises a wedge (53) for separating the mandrel half portions uniformly apart from each other, the wedge having tapered surfaces in contact with opposite edge surfaces of the mandrel half portions.