Abstract: A manufacturing method for appropriately manufacturing an arc-shaped rail that is C-shaped in cross section includes: a first process of forming one side wall 313 and one of circumferential wall portions 312 by bending a ring R of a thin metal plate by spinning, the circumferential wall portions 312 being portions on both sides of a width direction of the inner circumferential wall or the outer circumferential wall divided by a slit 314; a second process of forming the other side wall 313 and the other circumferential wall portion 312 by spinning using a plurality of cores 41 to 43 so as to envelop the cores 41 to 43, the cores 41 to 43 being obtained by dividing a core in a width direction to not more than a width of the slit 314; and a third process of separately extracting the cores 41 to 43 from the slit 314.

Abstract: A panel inspection apparatus includes a resonant frequency extracting unit for extracting a plurality of resonant frequencies of a panel, a resonant frequency selecting unit for selecting a combination of resonant frequencies consisting of two resonant frequencies A and B with different vibration propagation paths among the extracted plurality of resonant frequencies, a non-defective range generating unit for generating a non-defective range on a coordinate system in which resonant frequencies A and B are taken on coordinate axes by statistically processing a set of the resonant frequencies A and B selected for each of a plurality of non-defective panels determined as non-defective in advance, and a panel quality determining unit for determining whether the quality of the panel to be inspected is good based on comparison between resonant frequencies A and B selected for the panel to be inspected and the non-defective range generated by the non-defective range generating unit.

Abstract: In a press working apparatus, while a servo motor is acting, an upper die is made to come close to a lower die and press working of the first time is conducted on a steel plate. A slider is raised to a movable punch preparation position. A movable punch is protruded from a die face of the upper die by width and locked by a mechanical lock. The upper die is made to come close to the lower die again and the steel plate is pushed with the upper die and at the same time an additional worked portion is pushed and deformed with the movable punch so as to conduct press working of the second time. After the movable punch has been retracted, the slider is raised.

Abstract: In a press working apparatus, while a servo motor is acting, an upper die is made to come close to a lower die and press working of the first time is conducted on a steel plate. A slider is raised to a movable punch preparation position. A movable punch is protruded from a die face of the upper die by width and locked by a mechanical lock. The upper die is made to come close to the lower die again and the steel plate is pushed with the upper die and at the same time an additional worked portion is pushed and deformed with the movable punch so as to conduct press working of the second time. After the movable punch has been retracted, the slider is raised.

Abstract: In a press working apparatus 10, while a servo motor 24 is acting, an upper die 38 is made to come close to a lower die 52 and press working of the first time is conducted on a steel plate 12. A slider 32 is raised to a movable punch preparation position. A movable punch 90 is protruded from a die face 38a of the upper die 38 by width H and locked by a mechanical lock 94. The upper die 38 is made to come close to the lower die 52 again and the steel plate 12 is pushed with the upper die 38 and at the same time an additional worked portion 12a is pushed and deformed with the movable punch 90 so as to conduct press working of the second time. After the movable punch 90 has been retracted, the slider 32 is raised.

Abstract: A panel inspection apparatus includes a resonant frequency extracting unit for extracting a plurality of resonant frequencies of a panel, a resonant frequency selecting unit for selecting a combination of resonant frequencies consisting of two resonant frequencies A and B with different vibration propagation paths among the extracted plurality of resonant frequencies, a non-defective range generating unit for generating a non-defective range on a coordinate system in which resonant frequencies A and B are taken on coordinate axes by statistically processing a set of the resonant frequencies A and B selected for each of a plurality of non-defective panels determined as non-defective in advance, and a panel quality determining unit for determining whether the quality of the panel to be inspected is good based on comparison between resonant frequencies A and B selected for the panel to be inspected and the non-defective range generated by the non-defective range generating unit.

Abstract: A method of manufacturing a wheel rim by bringing end faces of a workpiece into abutment against each other to form a hollow cylindrical body and forming a circumferential recess which is depressed from an outer circumferential wall of said hollow cylindrical body toward an inner circumferential wall thereof, including providing protrusions disposed near ends of a joined area of the hollow cylindrical body and extending in a joining direction, and then pressing the outer circumferential wall of the hollow cylindrical body to form the recess.

Abstract: A method for molding a wheel rim hump part, comprising the steps of stopping a fist claw (30) and a second claw (32) holding a work (wheel rim for vehicle) (W) at specified positions and allowing an annular support member (160) to abut on the end surface of the curl part (C1) of the work (W), closing a right side first mold (16b) to support the curl part (C1) and the outer peripheral wall surface of the work by the support mold (106) of the right side first mold (16b), also closing a left side first mold (16a) to support the curl part (C1) and the outer peripheral wall surface of the work by the support mold (106) of the left side first mold (16a), moving forward a long rod (136) to allow a roller metal mold (124) to abut on the inner peripheral wall surface of the work (W), and turning the roller metal mold (124) along the circumferential direction thereof.

Abstract: In a press working apparatus 10, while a servo motor 24 is acting, an upper die 38 is made to come close to a lower die 52 and press working of the first time is conducted on a steel plate 12. A slider 32 is raised to a movable punch preparation position. A movable punch 90 is protruded from a die face 38a of the upper die 38 by width H and locked by a mechanical lock 94. The upper die 38 is made to come close to the lower die 52 again and the steel plate 12 is pushed with the upper die 38 and at the same time an additional worked portion 12a is pushed and deformed with the movable punch 90 so as to conduct press working of the second time. After the movable punch 90 has been retracted, the slider 32 is raised.

Abstract: A method for molding a wheel rim hump part, comprising the steps of stopping a fist claw (30) and a second claw (32) holding a work (wheel rim for vehicle) (W) at specified positions and alowing an annular support member (160) to abut on the end surface of the curl part (C1) of the work (W), closing a right side first mold (16b) to support the curl part (C1) and the outer peripheral wall surface of the work by the support mold (106) of the right side first mold (16b), also closing a left side first mold (16a) to support the curl part (C1) and the outer peripheral wall surface of the work by the support mold (106) of the left side first mold (16a), moving forward a long rod (136) to allow a roller metal mold (124) to abut on the inner peripheral wall surface of the work (W), and turning the roller metal mold (124) along the circumferential direction thereof.

Abstract: A rim (10) is produced by a production process including a step (A) of bending a workpiece (11) to bring end faces of the workpiece into contact with each other, a step (B) of forming a circular cylinder body (12) by joining the end faces brought to be in contact with each other, a step (C) of inspecting a joint portion (13) of the circular cylinder body (12), a step (D) of forming a drop portion (16), subsiding toward the inner peripheral wall (15) side, in an outer peripheral wall (14) of the circular cylinder body (12), a by bending both end portions of the circular cylinder body (12), a step (F) of forming hump portions (20) by pressing the circular cylinder body (12) from the inner peripheral wall (15) side to raise the outer peripheral wall (14), and a step (G) for forming a valve hole (22) and water drain holes (24) in the drop portion (16) and the curl portions (18). The rim (10) and a disk (102) that is separately produced are welded to form a wheel (122).

Abstract: A shape data specifies the shape of an elongated product within an overall coordinate system. Local coordinate systems are defined on respective cross-sections of the elongated product in the overall coordinate system. The local coordinate system is designed to represent a stable die of a bending apparatus. The images of the elongated product protruding forward from the stable die within the respective local coordinate systems serve to specify the position of a movable die of the bending apparatus. The specified position reflects the deformation induced in the elongated product between the stable and movable dies. An ideal movement amount of the movable die can be determined based on the determined positions within the local coordinate systems. The determined movement amount can be utilized to prepare the control data for the bending apparatus.

Abstract: Both ends of a metal cylindrical member are formed with rectangular cross section normal curls which are doubly bent in the radial direction of the cylindrical member by plastic working. With this, it is possible to form a rim directly from the cylindrical member and to easily produce a two-piece wheel. A barrel of the metal cylindrical member (2) is subjected to drop center portion working. Then, both ends (3) of the cylindrical member (2) are expanded by plastic working, and the expanded ends (3) are formed into normal curls (4) having rectangular cross sections by normal curl working (method 1). Alternatively, the expanded ends (3) are formed into curls (4) having circular cross sections by curl working, and the curls (4) are finished to a normal shape having a rectangular cross section by shaping and precision-enhancing working (method 2).

Abstract: Disclosed is a taphole plugging composition for metal melting apparatus, the composition comprising (a) a refractory aggregate having a maximum particle size of 5 mm or less, (b) graphite and silicon nitride each having a maximum particle size of 0.2 mm or less, (c) a refractory clay, (d) a compatibilized binder mixture comprising a phenolic resin, a ketone compound and a pitch, and (e) an organic fine fiber.

Abstract: A water level regulating system controlling the water level of a head tank of each of a plurality of hydroelectric plant installed in cascade along a stream by using an opening of guide vanes of a hydraulic turbine as a manipulated variable, and the water level of the head tank as a controlled variable. Each hydroelectric plant has a water level regulator constituting the water level regulating system. Each of the water level regulator of an upstream hydroelectric plant and the water level regulator of a downstream hydroelectric plant has a device varying PID parameters for controlling the water level in accordance with the opening of the guide vanes, and a device varying a reference water level to a set water level.

Abstract: A monolithic refractory material especially suitable for vibration forming comprising a refractory composition containing silica sol, alumina sol or both as a binder and a water-insoluble or slightly water-soluble phosphate. The refractory material is used for lining receptacles such as a ladle or tundish or a trough or the like for treating molten metals.