Abstract: A wire electrical discharge machine includes: a determination unit that determines whether or not a first route and a second route, each including an approach path, a machining path and an escape path in this order, are set in this order as a movement route of a wire electrode; and a wire movement control unit that, when the first route and the second route are determined to be set in a machining program in this order as the movement route of the wire electrode, causes the wire electrode to transition from the machining path of the first route to the machining path of the second route without moving the wire electrode along the escape path of the first route and the approach path of the second route.

Abstract: A wire electrical discharge machine includes: a determination unit that determines whether or not a first route and a second route, each including an approach path, a machining path and an escape path in this order, are set in this order as a movement route of a wire electrode; and a wire movement control unit that, when the first route and the second route are determined to be set in a machining program in this order as the movement route of the wire electrode, causes the wire electrode to transition from the machining path of the first route to the machining path of the second route without moving the wire electrode along the escape path of the first route and the approach path of the second route.

Abstract: A tool magazine (40) is able to move among a machining position where a tool (2) attached to a spindle (30) machines a workpiece, a tool exchange position where the tool (2) attached to the spindle (30) is exchanged, and a retreat position where an automated workpiece carrying device is not disturbed in placing or removing of the workpiece with respect to a workpiece placing part (20). The workpiece is placed on the workpiece placing part (20) from above or removed upward from the workpiece placing part (20) by the automated workpiece carrying device.

Abstract: First and second V-shaped link structures are arranged in an overlapping manner such that a first fixed pin and a second fixed pin of the first V-shaped link structure are positioned relative to a movable pin to one side with respect to the direction parallel to the longitudinal direction of a guide rail while a first fixed pin and a second fixed pin of the second V-shaped link structure are positioned relative to a movable pin to the side opposite to that in the first V-shaped link structure.

Abstract: First and second V-shaped link structures are arranged in an overlapping manner such that a first fixed pin and a second fixed pin of the first V-shaped link structure are positioned relative to a movable pin to one side with respect to the direction parallel to the longitudinal direction of a guide rail while a first fixed pin and a second fixed pin of the second V-shaped link structure are positioned relative to a movable pin to the side opposite to that in the first V-shaped link structure.

Abstract: A tool magazine (40) is able to move among a machining position where a tool (2) attached to a spindle (30) machines a workpiece, a tool exchange position where the tool (2) attached to the spindle (30) is exchanged, and a retreat position where an automated workpiece carrying device is not disturbed in placing or removing of the workpiece with respect to a workpiece placing part (20). The workpiece is placed on the workpiece placing part (20) from above or removed upward from the workpiece placing part (20) by the automated workpiece carrying device.

Abstract: A controller (10) for a machine tool (18) for tapping by a main shaft and a feed shaft, comprising an identifier unit (12) for identifying an index of the size of the tap, a temperature detector unit (19b) for detecting the temperature of a motor (19a) for the main shaft, an acceleration storage unit (21) for storing the acceleration of the main shaft corresponding to the index of the size of the tap, a rate storage unit (22) for storing the rate of varying the acceleration of the main shaft depending upon the temperature of the motor, and an acceleration calculation unit (16) for calculating a new acceleration of the main shaft by multiplying an acceleration determined from the index of the size of the tap and from the acceleration storage unit by a rate determined from the detected temperature and from the rate storage unit.

Abstract: A hydraulic piston is housed in a cylinder chamber that is provided in a cover plate of a transmission case and that opens toward a pressing arm so that the hydraulic piston is capable of rotating the pressing arm by abutting against a rearward arm portion of the pressing arm, and a hydraulic pipe supplying pressure oil to the cylinder chamber is connected to the cover plate.

Abstract: A brake hub (36) and a second gear shaft (22) are rotatably supported by a bearing (42) and a bearing (43), the bearing (42) interposed between a projection (11D-1) of a support member (11D) disposed on the inner side of a recess (36a) of the brake hub and the inner peripheral surface of the recess, the bearing (43) interposed between a support member (11E) surrounding a top end portion of the brake hub and the top end portion of the brake hub. The transfer further comprises a disc pressing pin (50) inserted through a hole (11D-4) in the support member, a pressing plate (51) disposed on the outer side of the support member, and plate pressing means. The plate pressing means presses the pressing plate, the pressing plate presses the disc pressing pin, and the disc pressing pin presses a press brake disc (35C).

Abstract: A feeder for a machine tool adapted to move a table relative to a saddle by rotation of a motor includes a ball thread nut fixed to the saddle and a ball thread shaft that engages with the ball thread nut in a rotatable manner but is immovable in an axial direction of the ball thread shaft relative to the table. The motor is fixed to the table and the ball thread shaft is coupled to the motor. A sum of a movable distance of the table relative to the saddle and a length of the saddle in the axial direction is shorter than a length of the table in the axial direction. The feeder further includes rails fixed to the table on its surface where the motor is fixed and bearings that are fixed to the saddle and bear the rails.

Abstract: An alarm device for a clutch that issues an alarm indicating a lifetime expiration of the clutch that selectively connects and disconnects an input shaft to and from an output shaft, includes: a slip heat release threshold setting unit 104 that establishes a threshold criteria as to a clutch damage or the clutch lifetime, in a form of a relation between a heat release generated in a clutch slip operation and a frequency of the heat release occurrences; and a slip heat release calculator 105 that calculates the heat release during the clutch operation, based on a hydraulic oil pressure in an actual clutch operation and a relative circumferential speed between input and output shafts, the alarm device 11 issues the alarm based on the calculation result through the slip heat release calculating means 105 and the slip heat release threshold setting means 104.

Abstract: A hydraulic piston is housed in a cylinder chamber that is provided in a cover plate of a transmission case and that opens toward a pressing arm so that the hydraulic piston is capable of rotating the pressing arm by abutting against a rearward arm portion of the pressing arm, and a hydraulic pipe supplying pressure oil to the cylinder chamber is connected to the cover plate.

Abstract: A controller (10) for a machine tool (18) for tapping by a main shaft and a feed shaft, comprising an identifier unit (12) for identifying an index of the size of the tap, a temperature detector unit (19b) for detecting the temperature of a motor (19a) for the main shaft, an acceleration storage unit (21) for storing the acceleration of the main shaft corresponding to the index of the size of the tap, a rate storage unit (22) for storing the rate of varying the acceleration of the main shaft depending upon the temperature of the motor, and an acceleration calculation unit (16) for calculating a new acceleration of the main shaft by multiplying an acceleration determined from the index of the size of the tap and from the acceleration storage unit by a rate determined from the detected temperature and from the rate storage unit.

Abstract: A feeder for a machine tool moves a table relative to a saddle in one axial direction by rotation of a motor. A ball thread shaft is attached in a manner engaging with a nut fixed to the saddle, and rotatable but immovable relative to the table, and is coupled to the motor fixed to the table. A length obtained by adding a relative movement distance S of the saddle relative to the table to a size Ls of the saddle in a direction of movement relative to the table is shorter than a size Lt of the table in a direction of movement relative to the saddle (i.e., (Ls+S)<Lt).

Abstract: An object of the present invention is to provide a transfer incorporating a wet brake which, for example, enables a gear shaft for a second gear and a sun gear to be supported by two bearings without inconveniences such as an increase in the axial dimension of the transfer. Accordingly, a brake hub (36) and a second gear shaft (22) are rotatably supported by a bearing (42) and a bearing (43), the bearing (42) interposed between a projection (11D-1) of a support member (11D) disposed on the inner side of a recess (36a) of the brake hub and the inner peripheral surface of the recess, the bearing (43) interposed between a support member (11E) surrounding a top end portion of the brake hub and the top end portion of the brake hub. The transfer further comprises a disc pressing pin (50) inserted through a hole (11D-4) in the support member, a pressing plate (51) disposed on the outer side of the support member, and plate pressing means.

Abstract: A floor section is formed at the rear of a vehicle body, at one side of the vehicle body. A lifting floor device having a floor body lifted and lowered by a lifting drive device is placed above the vehicle body. The floor body has a cutout at the left side of the floor body, at the rear half thereof. The right side of the floor body is used as a passage for a physically handicapped person. A stairway device is provided between the floor body and the floor section as a passage for an able-bodied person, on the floor body side in the cutout, and the stairway device is pivotable in a vertical plane. A lifting table is placed behind the vehicle body, on the left side thereof so that the lifting table can face the rear end of the passage for a physically handicapped person.

Abstract: In a gear train in which a gear case encases a first gear meshing with a second gear having a diameter smaller than that of the first gear, a sufficient amount of lubricant is normally supplied to the upper second gear. As a result, it is possible to provide a lubrication structure of a gear train encased in a gear case designed to prevent occurrence of problems such as poor lubrication and seizure of a gear train.

Abstract: Providing an alarm device for a clutch that issues an alarm the clutch lifetime prior to the clutch lifetime expiration, so that the information regarding the lifetime expiration is informed of; further, the failure protection measures for the clutch are adopted.

Abstract: A floor section is formed at the rear of a vehicle body, at one side of the vehicle body. A lifting floor device having a floor body lifted and lowered by a lifting drive device is placed above the vehicle body. The floor body has a cutout at the left side of the floor body, at the rear half thereof. The right side of the floor body is used as a passage for a physically handicapped person. A stairway device is provided between the floor body and the floor section as a passage for an able-bodied person, on the floor body side in the cutout, and the stairway device is pivotable in a vertical plane. A lifting table is placed behind the vehicle body, on the left side thereof so that the lifting table can face the rear end of the passage for a physically handicapped person.

Abstract: An automatic tool changing method and an automatic tool changing device for a machine tool with a numerical controller capable of reducing the occurrence of impact due to tool exchange with a simple structure. A turret that rotates about a pivot shaft is provided on an arm and holds multiple tools. A swing cam CS that cooperates with a swing roller provided on the turret is provided on a spindle head. As the spindle head descends the turret rotates due to the action of the swing roller and the cam CS and exchanges tools. In order to lessen the impact that occurs at this time, the velocity of the spindle head is controlled. The ideal swing velocity pattern for the turret is obtained, and from this swing velocity pattern the swing position of the turret at each moment is obtained. From the swing roller and cam CS positions at this position the position of the spindle head 34 is obtained.