摘要:
A wire cut electrical discharge machine (10) has two machining fluid supply systems respectively for supplying machining fluid is having different qualities to the machining section (14) thereof, namely, a rough-machining fluid supply system (20) and a finish-machining fluid supply system (60). The rough-machining fluid supply system (20) has a first machining fluid quality regulating circuit comprising a first machining fluid tank (26) having a filtering device (3) for filtering powdery chips, a specific resistance detector (34), a cooler or heater (42, 44), an ion exchange device (52) and pumps (40, 58), and the finish-machining fluid supply system (60) has a second machining fluid quality regulating circuit comprising a second machining fluid tank (66), a specific resistance detector (74), an ion exchange device (92), a cooler or heater (42, 44) and pumps (40, 98). A machining fluid of a quality appropriate for the purpose of wire cut electrical discharge machining, namely, rough machining or finish machining, is supplied to the machining section.
摘要:
A wire cut electric discharge machine (10) is equipped with a work table including a horizontal slide table (20) mounted on a metallic bed (14) of the wire cut electric discharge machine (10), and a work rest (22) fixed to the upper surface of the horizontal slide table (20). The horizontal slide table (20) and the work rest (22) are formed of an electro-conductive ceramic material to connect the work table directly electrically to the grounded metallic bed (14) so that the work table is held at ground potential without increasing reactance (L).
摘要:
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. A highly pressurized working fluid injected from a nozzle (51) and penetrating into the actuator through gaps between apparatus components is discharged outside the apparatus through the switch port and a pressure relief port (89) in communication therewith, so that the actuator is prevented from decreasing the urging force acting upon the movable piece to thereby accurately support the wire electrode on a predetermined traveling path.
摘要:
There is provided a linear actuator provided with a dust-proof mechanism capable of preventing dust-proof belts from being deformed, improving a sealing performance between the dust-proof belts and a housing member, and achieving high dust-proof performance irrespective of a size of the linear actuator. The linear actuator provided with the dust-proof mechanism includes: a housing member disposed so as to cover at least a ball screw; an opening portion formed in the housing member so as to extend along a moving locus of a movable stage; and dust-proof belts stretched inside the housing member so as to close the opening portion by being mounted to mounting members disposed both end portions of the housing member, wherein a bypass member for bypassing the dust-proof belts positioned at position overlapped with the movable stage is provided for the movable stage so as to realize movement of the movable member along the opening portion while closing and sealing the opening portion by the dust-proof belts, and in such a linear actuator provided with the dust-proof mechanism, the dust-proof belts are wound up around the mounting member and sandwiched between the mounting member and the end portions of the housing member.
摘要:
A position detection system includes a linear motor having a rod in which magnetic poles of N pole and S pole are arranged alternately in an axial direction and a plurality of coils surrounding the rod a magnetic sensor for detecting change in the direction of the magnetic field of the rod caused by linear movement of the rod relative to the coils to output a sine wave signal and a cosine wave signal which are 90° phase shifted with respect to one another, and a position detecting circuit for detecting a position of the rod relative to the coils. As the magnetic sensor detects the change in the direction of the magnetic field of the rod, the sine wave signal and the cosine wave signal output from the magnetic sensor hardly vary even when the distance between the rod and the magnetic sensor is changed.
摘要:
Disclosed is a micro actuator capable of being formed in compact as a whole, such as 10 mm in diameter by diminishing a difference between a stroke distance of a moving member and an overall length, and by reducing a sectional area taken in a direction orthogonal to a stroke direction. The micro actuator includes: a spline shaft formed as a cylinder with a hollow part and having an axially extending slit opening; a spline nut fit-engaged with the spline shaft and axially guiding the spline shaft; a pair of end caps fixed to openings at both ends of the spline shaft; a magnet rod supported at both ends within the hollow part of the spline shaft by the end caps; and a forcer loosely fit-engaged with a periphery of the magnet rod within the hollow part of the spline shaft to constitute a linear motor together with the magnet rod and connected with the spline nut through the slit opening.
摘要:
Provided is an X-Y table actuator, which is capable of moving and positioning a movable table (5) freely in an X-Y plane with a sufficient thrust, and can be simply manufactured at a low cost. The X-Y table actuator is constituted by stacking a stationary plate (2), an intermediate plate (4), and a movable plate (5). Between the stationary plate (2) and the intermediate plate (4), arranged is an X-direction drive means for driving the intermediate plate (4) in an X-direction with respect to the stationary plate (2). Between the intermediate plate (4) and the movable plate (5), on the other hand, there is provided a Y-direction drive means (7) for moving the movable plate (5) forward and backward in a Y-direction with respect to the intermediate plate (4). By stacking the stationary plate (2) and the movable plate (5), which are formed into a substantially channel-shape, and the intermediate plate (4), which is formed into a substantially flat-shape on each other, a housing chamber (60) for the X-direction drive means is formed between the stationary plate (2) and the intermediate plate (4), and a housing chamber (70) for the Y-direction drive means is formed between the intermediate plate (4) and the movable plate (5).
摘要:
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.
摘要:
A compact linear motor is provided which is able to limit a rod, which linearly moves relatively to coils, from revolving.The linear motor comprises a rod (11) equipped with magnets (13), coils (4) surrounding the rod (11), and a housing (5) covering the coils (4), and the rod (11) is made to linearly move relatively to the coils (4) by magnetic fields from the magnets (13) and current made to flow through the coils (4). And the rod (11) comprises an outer circumferential surface on which spline grooves (10a) are formed so as to run along an axial direction of the rod (11). The housing (5) comprises a spline nut (8) that fits the spline grooves (10a) and limits the rod (11) from revolving around an axis line thereof.
摘要:
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.