Abstract: A twin rotation driving apparatus is provided, including a base body, an axle unit pivotally connected to the base body for carrying a workpiece, a first driving unit disposed on the base body and having a first gear set connected to the axle unit and a first motor coaxially connected to the first gear set, and a second driving unit disposed on the base body and having a second gear set connected to the axle unit and a second motor coaxially connected to the second gear set. The twin rotation driving apparatus includes two motors and two gear sets. Therefore, smaller motors can be included in the twin rotation driving apparatus, and the twin rotation driving apparatus is compact and can still generate great enough torques.

Abstract: The invention provides a working trough and a method for maintaining a uniform temperature of a working fluid. The working trough is applied to an electrical discharge machine that performs wire cutting using the working fluid. The method for maintaining a uniform temperature of the working fluid is applied to the working trough and characterized by forming opening structures in a receiving slot of the working trough such that a spiral swirl having a predetermined height is allowed to be formed in the working fluid, thereby maintaining a uniform temperature of the working fluid in the receiving slot when a wire cutting process is performed in the working fluid by the electrical discharge machine. The disturbance of the spiral swirl also facilitates the discharge of scraps. The present invention further has an advantage of low cost.

Abstract: A backlash eliminating device for helical gears is provided for a gear transmission system which includes a transmission shaft, two helical gears and a match gear. A sleeve mounted on the transmission shaft has an outer wall, an inner wall and at least two sections of spiral grooves penetrating through the outer wall and the inner wall. The sleeve includes a transmission part and two extremity parts. The transmission part is disposed between the spiral grooves, and is fixedly connected to the transmission shaft. The extremity parts are disposed outside of the spiral grooves. The helical gears are fixedly connected to the two extremity parts. The sleeve having the spiral grooves provides a preload spring force along an axial direction of the transmission shaft, so that the two helical gears are tightly engaged with the match gear.

Abstract: The invention provides a working trough and a method for maintaining a uniform temperature of a working fluid. The working trough is applied to an electrical discharge machine that performs wire cutting using the working fluid. The method for maintaining a uniform temperature of the working fluid is applied to the working trough and characterized by forming opening structures in a receiving slot of the working trough such that a spiral swirl having a predetermined height is allowed to be formed in the working fluid, thereby maintaining a uniform temperature of the working fluid in the receiving slot when a wire cutting process is performed in the working fluid by the electrical discharge machine. The disturbance of the spiral swirl also facilitates the discharge of scraps. The present invention further has an advantage of low cost.

Abstract: The invention provides a working trough and a method for maintaining a uniform temperature of a working fluid. The working trough is applied to an electrical discharge machine that performs wire cutting using the working fluid. The method for maintaining a uniform temperature of the working fluid is applied to the working trough and characterized by forming opening structures in a receiving slot of the working trough such that a spiral swirl having a predetermined height is allowed to be formed in the working fluid, thereby maintaining a uniform temperature of the working fluid in the receiving slot when a wire cutting process is performed in the working fluid by the electrical discharge machine. The disturbance of the spiral swirl also facilitates the discharge of scraps. The present invention further has an advantage of low cost.

Abstract: A backlash eliminating device for helical gears is provided for a gear transmission system which includes a transmission shaft, two helical gears and a match gear. A sleeve mounted on the transmission shaft has an outer wall, an inner wall and at least two sections of spiral grooves penetrating through the outer wall and the inner wall. The sleeve includes a transmission part and two extremity parts. The transmission part is disposed between the spiral grooves, and is fixedly connected to the transmission shaft. The extremity parts are disposed outside of the spiral grooves. The helical gears are fixedly connected to the two extremity parts. The sleeve having the spiral grooves provides a preload spring force along an axial direction of the transmission shaft, so that the two helical gears are tightly engaged with the match gear.

Abstract: An apparatus for eliminating backlash is disclosed, which is installed between a first planet gear and a second planet gear in a planetary gear set to be used for generating a preload elastic force in a direction perpendicular to the direction of an input torque of the planetary gear set so as to eliminate a two-way backlash of the planetary gear set.

Abstract: A wire electrical discharge machine (WEDM) including a motion platform, a sink, a workbench, a connecting element, a jib, a first head and a second head is provided. The sink is disposed separately above the motion platform, and the workbench is disposed in the sink. The workbench is connected to the motion platform via the connecting element such that the motion platform drives the workbench moving along a first direction and a second direction. Besides, the jib is fixedly connected with the sink, and the first head is disposed inside the sink and connected with the jib. The second head is disposed above the first head. Thus, the jib does not cause relative motion to the sink in order to avoid leaking.

Abstract: A swivel spindle head with gear device driven by multiple torque motors is disclosed, which comprises: a tool spindle, having a first shaft and a second shaft being radially disposed at two opposite sides of the tool spindle while sharing a common axial line; a plurality of torque motors, radially disposed at a side of the tool spindle; and a reduction gear set, radially disposed at a side of the tool spindle opposite to the plural torque motors, composed of a plurality of driving gears and a driven gear; wherein the amount of the plural driving gears is the same as that of the plural torque motors while enabling each of the plural driving gears to connect with a rotor shaft of its corresponding torque motor, and the same time, connecting the driven gear on the second shaft of the tool spindle.

Abstract: A swivel spindle head with gear device driven by multiple torque motors is disclosed, which comprises: a tool spindle, having a first shaft and a second shaft being radially disposed at two opposite sides of the tool spindle while sharing a common axial line; a plurality of torque motors, radially disposed at a side of the tool spindle; and a reduction gear set, radially disposed at a side of the tool spindle opposite to the plural torque motors, composed of a plurality of driving gears and a driven gear; wherein the amount of the plural driving gears is the same as that of the plural torque motors while enabling each of the plural driving gears to connect with a rotor shaft of its corresponding torque motor, and the same time, connecting the driven gear on the second shaft of the tool spindle.

Abstract: The invention provides a working trough and a method for maintaining a uniform temperature of a working fluid. The working trough is applied to an electrical discharge machine that performs wire cutting using the working fluid. The method for maintaining a uniform temperature of the working fluid is applied to the working trough and characterized by forming opening structures in a receiving slot of the working trough such that a spiral swirl having a predetermined height is allowed to be formed in the working fluid, thereby maintaining a uniform temperature of the working fluid in the receiving slot when a wire cutting process is performed in the working fluid by the electrical discharge machine. The disturbance of the spiral swirl also facilitates the discharge of scraps. The present invention further has an advantage of low cost.

Abstract: A wire electrical discharge machine (WEDM) including a motion platform, a sink, a workbench, a connecting element, a jib, a first head and a second head is provided. The sink is disposed separately above the motion platform, and the workbench is disposed in the sink. The workbench is connected to the motion platform via the connecting element such that the motion platform drives the workbench moving along a first direction and a second direction. Besides, the jib is fixedly connected with the sink, and the first head is disposed inside the sink and connected with the jib. The second head is disposed above the first head. Thus, the jib does not cause relative motion to the sink in order to avoid leaking.

Abstract: A closed box structure of a horizontal linear motor machine tool, comprising a frame, serving as a machine platform, carrying an X-movable part, a Y-movable part, and a Z-movable part, with said Y-movable part mounted on said X-movable part, said Z-movable part mounted on said Y-movable part, and said Z-movable part having a main axis head; characterized in that said frame, said X-movable part and said Y-movable part are shaped like open squares, said X-movable part, said Y-movable part and said Z-movable part each carry a set of two symmetrically adapted linear motors for being driven, wherein for each of said sets of linear motors magnetic forces are balanced against each other, so that deformations due to magnetic forces are avoided.

Abstract: The structure for symmetrically disposed linear motor operated tool machine comprises two parallelly erected sustaining walls, a movable gantry, a sliding saddle, a tool spindle, and a weight compensation device. At both sides of the movable gantry between the sustaining walls, between the gantry and the sliding saddle, and between the tool spindle and the sliding saddle, a pair of linear motors is symmetrically disposed such that the armature reaction between the winding and magnet is compensated each other by the opposite one therefore any possible deformation force to the tool machine structure is eliminated.

Abstract: A closed box structure of a horizontal linear motor machine tool, comprising a frame, serving as a machine platform, carrying an X-movable part, a Y-movable part, and a Z-movable part, with said Y-movable part mounted on said X-movable part, said Z-movable part mounted on said Y-movable part, and said Z-movable part having a main axis head; characterized in that said frame, said X-movable part and said Y-movable part are shaped like open squares, said X-movable part, said Y-movable part and said Z-movable part each carry a set of two symmetrically adapted linear motors for being driven, wherein for each of said sets of linear motors magnetic forces are balanced against each other, so that deformations due to magnetic forces are avoided.

Abstract: A transporting and positioning device for tool magazine of a bridge type machine tool comprises a pair of parallel guide-ways on a plate, a seat slidably mounted on the guide-ways for supporting the tool magazine, a drive mechanism including a cylinder, an extendable positioning shaft, a connection block adjacent the plate the connection block including a top hole and being fixed to the table, and a second cylinder having an extendable second positioning shaft; In an operating state of the machine tool, the second positioning shaft is actuated by the second cylinder to project an adjustable distance through the plate to urge against the seat for fastening the seat and the tool magazine. A tool change is performed after fastening the positioning shaft in the hole. The invention is also applicable to EDM.

Abstract: The structure for symmetrically disposed linear motor operated tool machine comprises two parallelly erected sustaining walls, a movable gantry, a sliding saddle, a tool spindle, and a weight compensation device. At both sides of the movable gantry between the sustaining walls, between the gantry and the sliding saddle, and between the tool spindle and the sliding saddle, a pair of linear motors is symmetrically disposed such that the armature reaction between the winding and magnet is compensated each other by the opposite one therefore any possible deformation force to the tool machine structure is eliminated.

Abstract: A braking device of a linear guide comprises a braking slide seat which is mounted on the guide. The braking slide seat is provided with a braking rod which is provided in the mid-segment with an insertion slot having a tapered bevel and in the rear end with a disk spring for pushing the front end of the braking rod to make a frictional contact with the guide. An urging rod is powered by a hydraulic or a pneumatic source to enter the insertion slot to cause the braking rod to move away from the guide. In the event of a power outage, the urging rod is retreated from the insertion slot, the braking rod is urged by the spring to make a frictional contact with the guide, thereby exerting a braking force on the guide to bring the slide seat to an abrupt halt.

Abstract: A braking device of the linear guide comprises a braking slide seat which is mounted on the guide. An operation platform is mounted on the braking slide seat for moving the operation platform along the guide. The braking slide seat is provided with a braking rod which is provided in the mid-segment with an insertion slot having a tapered bevel and in the rear end with a disk spring for pushing the front end of the braking rod to make a frictional contact with the guide. The braking rod is further provided in other side with a piston push rod driven by the hydraulic or pneumatic power source. The urging rod is pushed by the piston in motion to enter the insertion slot of the braking rod so as to cause the braking rod to move away from the guide.