Abstract: A method of manufacturing a metal core for a resin gear is provided. The metal core has a boss portion into which a shaft is press-fitted and a ring portion to which an outer peripheral resin is joined. The method includes swaging a plate material having a center hole by pressing the plate material in an axial direction to form a swaged body, and forging the swaged body by pressing the swaged body in the axial direction under a higher pressure. The swaging includes deforming a portion around the center hole in the axial direction to form an inner circumferential swaged portion, and deforming an outer circumferential portion of the plate material in the same axial direction to form an outer circumferential swaged portion. The forging includes forming the inner circumferential swaged portion into the boss portion, and forming the outer circumferential swaged portion into the ring portion.

Abstract: A paint supply method supplies a paint into a paint cartridge by using a filling valve that has: a paint supply channel that is linkable in communication with a supply portion provided for supplying the paint into the paint cartridge; a branch channel that branches from the paint supply channel near a site of linkage in communication between the supply portion and the paint supply channel; and a trigger valve as an open-close valve of the paint supply channel which is disposed in the paint supply channel upstream of the site of linkage in communication. After a filling liquid is filled into the branch channel, the trigger valve (open-close valve) is opened, and the paint is supplied into the paint cartridge via the paint supply channel.

Abstract: A paint filling apparatus has a plurality of header portions, and one common manifold portion that is capable of supplying a cleaning liquid to each header portion. One side of each header portion is attachable to and detachable from a paint cartridge, and another side of each header portion is attachable to and detachable from the common manifold portion. Each header portion has a paint supply channel for filling a paint into the paint cartridge. The paint supply channel of each header portion is constructed of a piping member and a paint channel. An end portion of each header portion is linkable in communication with the inside of the paint cartridge, and another end portion thereof is linked in communication with a corresponding one of paint tanks that are provided separately for each of the paint colors. An intermediate portion of each paint supply channel is provided with a paint valve that controls the open-closed state of the upstream side of the paint supply channel.

Abstract: Disclosed is a low alloy steel material for generator rotor shafts, which has tensile strength of not less than 700 MPa at room temperature. Preferably the low alloy steel material consists of, by mass percent, 0.15 to 0.35% carbon, 0.01 to 0.10% Si, 0.10 to 0.50% Mn, 1.3 to 2.0% Ni, 2.1 to 3.0% Cr, 0.20 to 0.50% Mo, 0.15 to 0.35% Cu, 0.06 to 0.14% V, and the balance of Fe and unavoidable impurities.

Abstract: An electrostatic coating system includes a coating robot (1) and an electrostatic atomizer (6) attached to a polyarticular wrist portion (5) of the robot (1). The atomizer (6) includes an end plate (45), metallic connector (50) fixed to the end plate (45) in electric conduction, high voltage generator (20) and bell head (18). Electric power is supplied to the high voltage generator (20) through the connector (50). Wires (53) are connected to the connector (50) to take out high voltage leak caused by contamination like a deposition of paint on outer surfaces of the atomizer (6) through the wires 53 to control the high voltage generator (20) to lower the value of the high voltage applied to the bell head (18) of high voltage leak detected through the wires (53) is larger than a predetermined threshold value.

Abstract: A paint supply method supplies a paint into a paint cartridge by using a filling valve that has: a paint supply channel that is linkable in communication with a supply portion provided for supplying the paint into the paint cartridge; a branch channel that branches from the paint supply channel near a site of linkage in communication between the supply portion and the paint supply channel; and a trigger valve as an open-close valve of the paint supply channel which is disposed in the paint supply channel upstream of the site of linkage in communication. After a filling liquid is filled into the branch channel, the trigger valve (open-close valve) is opened, and the paint is supplied into the paint cartridge via the paint supply channel.

Abstract: A paint filling apparatus has a plurality of header portions, and one common manifold portion that is capable of supplying a cleaning liquid to each header portion. One side of each header portion is attachable to and detachable from a paint cartridge, and another side of each header portion is attachable to and detachable from the common manifold portion. Each header portion has a paint supply channel for filling a paint into the paint cartridge. The paint supply channel of each header portion is constructed of a piping member and a paint channel. An end portion of each header portion is linkable in communication with the inside of the paint cartridge, and another end portion thereof is linked in communication with a corresponding one of paint tanks that are provided separately for each of the paint colors. An intermediate portion of each paint supply channel is provided with a paint valve that controls the open-closed state of the upstream side of the paint supply channel.

Abstract: According to the present invention, even though the paint is filled or discharged repetitively to or from the paint bag (5), so that bursting of a coating bag (5) or lack of coating material during coating are not caused by accumulation of error between the filling amount and the using amount. That is, before a predetermined amount of the coating material is supplied to the coating material bag (5), the remaining coating material in the coating material bag (5) is extruded to empty it, since the coating material bag (5) is squashed by the pressure of fluid which was supplied to the hydraulic fluid chamber (6) outside of the bag.

Abstract: A painting material charging device may comprise a cartridge attaching unit, a painting material supplying path, a first switching unit, a painting material supplying unit, a discharging path, a second switching unit, a painting material sensor and a controlling unit. The controlling unit may be configured to be connected to the painting material sensor and the second switching unit. The controlling unit may be configured to cause the second switching unit to fully close the discharging path in a case where the painting material sensor detects the painting material.

Abstract: For providing a coating material cartridge capable of reliably discharging air and coating material stagnated in a hydraulic fluid chamber, a coating material cartridge has a cartridge main body, a partition body, a coating material transfer path and a plurality of hydraulic fluid transfer paths. The cartridge main body is detachably attached to a coating material filling device. The partition body partitions the inner region of the cartridge main body into a coating material chamber and a hydraulic fluid chamber. The coating material transfer path communicates the coating material chamber and the outer region of the cartridge main body, and each of the hydraulic fluid transfer paths communicates the hydraulic fluid chamber and a outer region of the cartridge main body. Each of the hydraulic fluid transfer paths has a plurality of openings that opens in the hydraulic fluid chamber and the distance for each of the openings from the connection end face is different from each other.

Abstract: A painting material charging device may comprise a cartridge attaching unit, a painting material supplying path, a first switching unit, a painting material supplying unit, a discharging path, a second switching unit, a painting material sensor and a controlling unit. The controlling unit may be configured to be connected to the painting material sensor and the second switching unit. The controlling unit may be configured to cause the second switching unit to fully close the discharging path in a case where the painting material sensor detects the painting material.

Abstract: Disclosed is a low alloy steel material for generator rotor shafts, which has tensile strength of not less than 700 MPa at room temperature. Preferably the low alloy steel material consists of, by mass percent, 0.15 to 0.35% carbon, 0.01 to 0.10% Si, 0.10 to 0.50% Mn, 1.3 to 2.0% Ni, 2.1 to 3.0% Cr, 0.20 to 0.50% Mo, 0.15 to 0.35% Cu, 0.06 to 0.14% V, and the balance of Fe and unavoidable impurities.

Abstract: It is a subject to provide a coating material leakage detection device capable of finding contamination of a hydraulic fluid at an early stage and capable of preventing the degradation of a coating quality of a work. For this purpose, coating material leakage from a coating material chamber to a hydraulic fluid chamber in a coating material cartridge is detected by a coating material leakage detection device. The coating material cartridge is attached detachably to a coating material filling device, and the coating material chamber and the hydraulic fluid chamber are partitioned from each other by way of a deformable partition body. Further, the coating material leakage detection device has a contaminant detection means for detecting the contaminant in the hydraulic fluid attributable to the coating material leakage. Accordingly, contamination of the hydraulic fluid can be found at an early stage.

Abstract: According to the present invention, even though the paint is filled or discharged repetitively to or from the paint bag (5), so that bursting of a coating bag (5) or lack of coating material during coating are not caused by accumulation of error between the filling amount and the using amount. That is, before a predetermined amount of the coating material is supplied to the coating material bag (5), the remaining coating material in the coating material bag (5) is extruded to empty it, since the coating material bag (5) is squashed by the pressure of fluid which was supplied to the hydraulic fluid chamber (6) outside of the bag.

Abstract: An electrostatic coating system includes a coating robot (1) and an electrostatic atomizer (6) attached to a polyarticular wrist portion (5) of the robot (1). The atomizer (6) includes an end plate (45), metallic connector (50) fixed to the end plate (45) in electric conduction, high voltage generator (20) and bell head (18). Electric power is supplied to the high voltage generator (20) through the connector (50). Wires (53) are connected to the connector (50) to take out high voltage leak caused by contamination like a deposition of paint on outer surfaces of the atomizer (6) through the wires 53 to control the high voltage generator (20) to lower the value of the high voltage applied to the bell head (18) of high voltage leak detected through the wires (53) is larger than a predetermined threshold value.

Abstract: For providing a coating material cartridge capable of reliably discharging air and coating material stagnated in a hydraulic fluid chamber, a coating material cartridge has a cartridge main body, a partition body, a coating material transfer path and a plurality of hydraulic fluid transfer paths. The cartridge main body is detachably attached to a coating material filling device. The partition body partitions the inner region of the cartridge main body into a coating material chamber and a hydraulic fluid chamber. The coating material transfer path communicates the coating material chamber and the outer region of the cartridge main body, and each of the hydraulic fluid transfer paths communicates the hydraulic fluid chamber and a outer region of the cartridge main body. Each of the hydraulic fluid transfer paths has a plurality of openings that opens in the hydraulic fluid chamber and the distance for each of the openings from the connection end face is different from each other.

Abstract: An apparatus for replenishing paint into a paint cartridge (25), which is capable of putting paint in respiratory circulation while the cartridge is in a waiting state. The apparatus includes a replenishing valve (61) which is capable of feeding paint to and from a paint chamber (30) of the paint cartridge (25) which is set on a replenishing stool (52), and a respiratory paint circulation valve (91) which is capable of feeding paint-extruding thinner to and from a thinner chamber (31) of the cartridge. After switching the replenishing valve (61) to a drain or discharge side, paint-extruding thinner is supplied from the respiratory paint circulation valve (91) to push paint out of the paint chamber (30) of the cartridge (25). Then, after switching the replenishing valve (61) to the side of a paint supply source, paint-extruding thinner is discharged by way of the respiratory paint circulation valve (91) to suck paint into the paint chamber (30).

Abstract: A rotor for a rotating electric machine comprises a shaft, a cylindrical permanent magnet put on the shaft, and a holding ring fixedly put on the permanent magnet. The permanent magnet is magnetized by Halbach magnetization, and the holding ring is formed by circumferentially alternately arranging nonmagnetic segments of a nonmagnetic material and magnetic segments of a magnetic material. Another rotor for a rotating electric machine comprises a solid, cylindrical permanent magnet, and a cylindrical holding ring put on the permanent magnet, wherein the permanent magnet is magnetized by Halbach magnetization, and the holding ring is formed by circumferentially alternately arranging nonmagnetic segments of a nonmagnetic material and magnetic segments of a magnetic material. A rotating electric machine is provided with one of the foregoing rotors, and a gas turbine power plant is equipped with a rotating electric machine including one of the foregoing rotors.

Abstract: A shape memory alloy pipe coupling in the present invention for joining two pipes, the pipe coupling comprising a tube of a shape memory alloy, and a cover of stainless steel having a sufficient thickness and having high corrosion resistance for covering the tube. The shape memory alloy is enclosed by the cover of high corrosion-resistant stainless steel, by which high-temperature water can be prevented from making the shape memory alloy brittle and from corroding and damaging the shape memory alloy particularly through galvanic corrosion even in the case where such high-temperature water exists in the inside or outside of the pipes.

Abstract: New low-alloy steel compositions and rotor shafts for electric machines made from them are described. High nickel and chromium contents ensure high strength and toughness, while other components, notably silicon and other impurities, are kept low with the result that magnetic properties remain good. One aspect provides a steel with the following proportions by weight:______________________________________ C 0.15 to 0.3% Si <0.1% Mn <1% Ni 3 to 5% Cr >2%, <3.5% (Mo + W) 0.1 to 1.0%, W being optional V 0.03 to 0.35%, ______________________________________and the remainder substantially Fe.Other aspects are also described.