Abstract: A linear motor actuator includes a raceway member 16 having a cylindrical shape in which a moving block moves in a hollow portion, the raceway member having a cross-sectional shape which has a narrower opening 15 than a width of the moving block 40 in part of the cylindrical shape and having a guide portion (rolling grooves 14 or the like) for guiding the moving block 40 in a cylinder axis direction on an inner surface of the cylindrical raceway member 16, the moving block 40 which is guided by the guide portion so as to move in the cylinder axis direction within the raceway member 16, a cylindrical or prismatic first magnet 18 which resides in an interior of the raceway member 16 to generate a magnetic force, and a second magnet (armatures 46 or the like) which resides on the moving block 40 side and which is shaped to encapsulate the first magnet 18.

Abstract: A mica tape comprising a mica foil, a glass cloth, and an inorganic filler arranged on the glass cloth, wherein the mica tape is wound a plurality of times about an outer circumferential surface of a conductor portion of an electrical rotating machine coil so as to form an insulating layer for the coil, and the inorganic filler has a Mohs hardness falling within a range of 1 to 7 and exhibits a heat conductivity superior to those of the mica foil and the glass cloth, whereby, the inorganic filler is excellent in the heat conductivity and has a Mohs hardness not lower than that of the glass cloth contained in the mica tape, when used together with the inorganic filler.

Abstract: An electric actuator is provided with a power transmission mechanism capable of converting a rotating driving power supplied from an electric motor to a reciprocating motion. This power transmission mechanism is provided with a cylindrical member formed, in its inner peripheral surface, with at least one row of rolling member rolling groove, a nut member disposed to be reciprocally through the rolling members endlessly circulating in the inner peripheral surface of the cylindrical member, and a cylinder rod operatively connected to an end portion of the nut member to be axially movable with respect to the cylindrical member. The reciprocating motion of the nut member in the axial direction is guided by the circular cylindrical member. According to such structure, high output and high controllability can be realized, as well as realizing of a compact electric actuator of a size similar to a conventional hydraulic cylinder.

Abstract: By reviewing a material of a forcer housing and an assembly structure of a coil member with respect to the forcer housing, a thrust force is increased, an optimum shape can be easily given to the forcer housing depending on a purpose of use, and a linear motor can be manufactured at low cost. The linear motor includes a magnet rod composed of a large number of magnetic poles arranged with predetermined pitches along an axial direction and a forcer having a through-hole into which the magnet rod is loosely inserted and reciprocatable relatively to the magnet rod according to an applied electric signal. The forcer is composed of a forcer housing in which the through-hole is defined and a coil member which is arranged on an inner peripheral surface of the through-hole of the forcer housing and to which the electric signal is applied. The forcer housing is formed by mold forming with an insulating nonmetal inorganic material.

Abstract: A track rail is formed in a channel-like configuration while having a guide passage for sliders. A table structure that moves within the guide passage includes: a pair of sliders that move forwards and backwards within the guide passage; and a connecting top board connecting those sliders to each other with a predetermined interval therebetween and provided with a mounting surface for a movable member. An armature constituting a linear motor is received between the pair of sliders, and field magnets constituting the linear motor are arranged in the track rail so as to face the guide passage. The armature and the field magnets, which constitute the linear motor, are completely integrated with the table structure and the track rail, which constitute a linear guide, and are entirely contained inside the linear guide.

Abstract: The present invention provides a drive guide apparatus capable of ensuring an increased lifetime by preventing heat generated from a primary side of a linear motor from being transferred to a rail or a moving member of a guide mechanism to which the primary side of the linear motor is connected, thereby preventing variation of rolling resistance or sliding resistance of the guide mechanism. The drive guide apparatus has a linear motor and a guide mechanism that has a rail and a moving member provided to be movable relative to the rail. A primary side of the linear motor is connected to the rail. Thermal insulators for blocking heat generated from the primary side of the linear motor are provided between the primary side and the rail of the guide mechanism to which the primary side is connected directly or indirectly.

Abstract: The present invention provides a drive guide apparatus capable of ensuring an increased lifetime by preventing heat generated from a primary side of a linear motor from being transferred to a rail or a moving member of a guide mechanism to which the primary side of the linear motor is connected, thereby preventing variation of rolling resistance or sliding resistance of the guide mechanism. The drive guide apparatus has a linear motor and a guide mechanism that has a rail and a moving member provided to be movable relative to the rail. A primary side of the linear motor is connected to the rail. Thermal for blocking heat generated from the primary side of the linear motor are provided between the primary side and the rail of the guide mechanism to which the primary side is connected directly or indirectly.

Abstract: A mica tape comprising a mica foil, a glass cloth, and an inorganic filler arranged on the glass cloth, wherein the mica tape is wound a plurality of times about an outer circumferential surface of a conductor portion of an electrical rotating machine coil so as to form an insulating layer for the coil, and the inorganic filler has a Mohs hardness falling within a range of 1 to 7 and exhibits a heat conductivity superior to those of the mica foil and the glass cloth, whereby, the inorganic filler is excellent in the heat conductivity and has a Mohs hardness not lower than that of the glass cloth contained in the mica tape, when used together with the inorganic filler.

Abstract: A track rail is formed in a channel-like configuration while having a guide passage for sliders. A table structure that moves within the guide passage includes:a pair of sliders that move forwards and backwards within the guide passage; and a connecting top board connecting those sliders to each other with a predetermined interval therebetween and provided with a mounting surface for a movable member. An armature constituting a linear motor is received between the pair of sliders, and field magnets constituting the linear motor are arranged in the track rail so as to face the guide passage. The armature and the field magnets, which constitute the linear motor, are completely integrated with the table structure and the track rail, which constitute a linear guide, and are entirely contained inside the linear guide.

Abstract: The present invention provides a drive guide apparatus capable of ensuring an increased lifetime by preventing heat generated from a primary side of a linear motor from being transferred to a rail or a moving member of a guide mechanism to which the primary side of the linear motor is connected, thereby preventing variation of rolling resistance or sliding resistance of the guide mechanism. The drive guide apparatus has a linear motor 10 and a guide mechanism 14 that has a rail 18 and a moving member (moving block 15) provided to be movable relative to the rail 18. A primary side 11 of the linear motor 10 is connected to the rail 18 or the moving member (moving block 15) of the guide mechanism 14.

Abstract: An electric rotating machinery is provided with a stator coil support device, which comprises a stator core provided with a slot having an opening, a stator coil installed in the slot of the stator core, a wedge member disposed so as to close the opening of the slot of the stator core, and an elastic plate member inserted between the stator coil and the wedge member. The wedge member is formed so as to have an inclination towards an axial direction of the stator core and the elastic plate member has a structure undulating towards the axial direction.

Abstract: An electric rotating machinery is provided with a stator coil support device, which comprises a stator core provided with a slot having an opening, a stator coil installed in the slot of the stator core, a wedge member disposed so as to close the opening of the slot of the stator core, and an elastic plate member inserted between the stator coil and the wedge member. The wedge member is formed so as to have an inclination towards an axial direction of the stator core and the elastic plate member has a structure undulating towards the axial direction.

Abstract: An upper guide assembly for a wire cut electric discharge machine adapted to be mounted with an automatic wire feeding mechanism, which holds the wire without direct mechanical contact. A hold jet nozzle is connected to the upper portion of a body 23, while an upper guide is connected to the lower portion of the body. The body includes an electrode roller for supplying electric power to the wire, and an electrode pinch roller capable of coming into and out of contact with the electrode roller. The hold jet nozzle includes a through hole whose center axis is aligned with a wire path a provided in the upper guide assembly and extending vertically, and a supply passage for pressurized machining fluid communicating with the through hole. The upper guide contains a die guide and an upper nozzle. A guide axis of the die guide and a center axis of the upper nozzle are aligned with the wire path a.

Abstract: A fluid level adjusting apparatus in an electric discharge machining tank includes an exhaust pipe connected to a machining fluid exhaust port of the machining tank, an adjustment pipe having an upper opening end and a lower opening end connected to the exhaust pipe and height adjusting apparatus automatically adjusting the height of the upper opening end of the adjustment pipe so that machining fluid in the electric discharge machining tank is drained out of the machining tank through the upper opening end of the adjustment pipe to maintain the fluid level of the machining fluid at the height of the upper opening end.

Abstract: A wire cut electric discharge machine provided with a machining fluid supply apparatus capable of supplying machining fluid in an amount large enough to permit a stable wire extension even in a finishing operation. During rough machining, a first flow regulating valve (6) provided in a first pipe (3) and a second flow regulating valve (10) and an on-off valve (11) respectively provided in a second pipe (4) are fully opened, so that machining fluid is injected from upper and lower nozzles (5, 9) respectively connected to these pipes. In the finishing operation, openings of the first and second flow regulating valves are reduced.

Abstract: A method and an apparatus for easily and reliably removing cut-out pieces cut out from a workpiece by wire-cut electric discharge machining, in which, upon completion of cutting a piece (41) out, a constraining assembly (63) mounted on the distal end of a piston (62) is brought close to the top surface of the piece under the control of a numerical control unit, and machining fluid is upwardly jetted from a lower nozzle (19) toward the bottom surface of the piece, to thereby hold the piece in the workpiece, with the piece kept away from the lower nozzle and prevented from being detached upwardly from the workpiece. While jetting the machining fluid, a worktable is horizontally moved to cause the cut-out piece to move in unison with the workpiece away from the lower nozzle in the horizontal direction.

Abstract: A core removing apparatus for removing cores from a workpiece upwardly or downwardly in dependence on the shape of each core cut out from the workpiece by means of wire-cut electric discharge machinng comprises a core removing unit (6) mounted on an electric discharge machine body. When a first operation mode is selected according to a code read from a program after a core (20) having an inverted trapezoidal shape in cross section is taper-machined, a core sucking section (16), fixed to the piston (15) of a vertical cylinder of the core removing unit, is brought in contact with the core by vertical movement and rotation of the piston, and the sucking section by which the core is sucked and held is moved upwardly to thereby pull out the core from the workpiece (19). Then, the core, moved to the outside of a core falling prohibition region by horizontal movement of the piston (13) of the horizontal cylinder, is disengaged from the core sucking section.

Abstract: A machining fluid circulating apparatus capable of variably controlling the amount of machining fluid supplied to an electric discharge machining region and maintaining the effective amount of the machining fluid supplied to a worktable unchanged. The amount of water which is supplied as machining fluid to the electric discharge machining region through upper and lower nozzles (15, 16), respectively communicated with pipes (32b, 32d and 32e) branching off from a pipe (32a) connected to a water tank (31) and the amount of water which is supplied to a worktable (12) through a sprinkler (35), are adjusted by a flow regulating valve (34) in the pipe (32c), in a manner inversely proportional to each other and therefore the total amount of water remains unchanged. Thus no substantial thermal deformation occurs in the worktable, thereby preventing deformation of the workpiece (40) and variation in the relative position of the workpiece and a wire electrode (50).

Abstract: A wire feed apparatus for a wire cut electric discharge machining apparatus, capable of moving a wire conveyor belt from an automatic wire extension position to a non-wire-transfer shunt position at the time of electric discharge machining, thereby preventing wear of the belts and reducing variation in the wire feed speed. The apparatus includes first and second conveyor belts selectively operated in accordance with predetermined conditions for wire feeding. At the time of automatic wire extension, an air cylinder of a wire feed mechanism is driven to move the second conveyor belt from a non-wire-transfer shunt position to the automatic wire extension position using a parallel link mechanism. The second conveyor belt is pressed against the first conveyor belt at the automatic wire extension position.

Abstract: A wire electrode guide apparatus (1) in a wire-cut electric discharge machine includes a switch valve (80) for supplying pressurized air and preventing the supply of the air to an air pressure-operated actuator (70) for driving a movable piece (40) for three point-support of a wire electrode (3) between the movable piece and a stationary piece. During wire extension, an air supply port (88) of the switch valve is communicated to a switch port (87) thereof through which the pressurized air is supplied to the actuator to move a piston rod (73) of the actuator away from the movable piece to release an urging force acting upon the same, resulting in easy insertion of the wire electrode between the stationary and movable pieces. During electric discharge machining, the switch port is disconnected from the pressurized air supply port to prevent the air supply to the actuator, so that the movable piece is urged by the actuator for wire support.