Patent application number | Description | Published |
20100034610 | SPINDLE DEVICE AND MACHINING CENTER INCLUDING THE SAME - To provide a spindle device and a machining center, in which spindle replacement can be carried out in an extremely short time, downtime during maintenance is short, and productivity is high. In a spindle device | 02-11-2010 |
20100084828 | INDEXING DEVICE FOR MACHINE TOOL - A cylindrical pressure-receiving member | 04-08-2010 |
20100107813 | CLAMP SLEEVE - A clamp sleeve for an indexing device is provided, the clamp sleeve being capable of providing a desirable clamping force without greatly increasing a fluid pressure, and having a long life. A clamp sleeve | 05-06-2010 |
20100123278 | CLAMPING DEVICE IN MAIN SHAFT DRIVING DEVICE FOR MACHINE TOOL - A clamping device in a main shaft driving device for a machine tool, in which the main shaft driving device rotationally driving a main shaft by a driving device, the clamping device includes: a braking member provided at a side of the frame and including a pressure-receiving surface and a braking portion; a pressure chamber formed by the pressure-receiving surface and the frame; and an operating fluid supplying mechanism provided for supplying the operating fluid from an operating fluid supply source to the pressure chamber. The press-contact force is caused to act upon the main shaft. The operating fluid supplying mechanism includes a switching portion that selectively supplies the operating fluid. The braking member is formed so that the braking portion causes the press-contact forces that differ from each other. | 05-20-2010 |
20100126308 | ANGULAR INDEXING APPARATUS FOR MACHINE TOOL - An angular indexing apparatus for a machine tool includes a rotating shaft, to which a rotationally driven member is secured; a removable housing surrounding the outer periphery of the rotating shaft; bearings disposed between the housing and the rotating shaft and separated from each other in the axial direction of the rotating shaft; and driving means, provided between the housing and the rotating shaft, rotating the rotating shaft to index an angular position. The driving means uses drive motors, each including a motor rotor and a motor stator disposed concentrically around the rotating shaft, and separated from each other in the axial direction of the rotating shaft. A multiple-row roller bearing capable of supporting an axial load and a radial load is used for the bearing closest to the side of the rotationally driven member. | 05-27-2010 |
20100170372 | SPINDLE HEAD FOR MACHINE TOOL - In a spindle head for a machine tool in which a spindle ( | 07-08-2010 |
20100175505 | CLAMPING DEVICE FOR ROTARY INDEX DEVICE FOR MACHINE TOOL - A clamping device for a rotary index device for a machine tool, in particular, a normal clamp type clamping device makes it possible to simplify the structure thereof and to maintain a stabilized positioning performance. In a rotary index device ( | 07-15-2010 |
20100178125 | INDEX DEVICE FOR MACHINE TOOL - An index device for a machine tool includes a rotary shaft ( | 07-15-2010 |
20100183394 | INDEXING DEVICE - An indexing device ( | 07-22-2010 |
20100189525 | MACHINING HEAD FOR MACHINE TOOL - A machining head has a support head component, which includes first and second support segments and a base segment supporting both the first and second support segments, the support segments being disposed opposite to each other across the spindle unit to hold the spindle unit therebetween such that a center of axle thereof is aligned with a rotary axis line thereof, the first and second support segments respectively including support shafts whose opposing end surfaces have the spindle unit secured thereto. The support segments respectively include housings as main bodies that are independent of the base segment. The housings accommodate the support shafts. Each housing is attached to the base segment by means of a plurality of first screw members that are screwed to the base segment and are manipulatable from the outside. The spindle unit is attached to the support shafts by means of a plurality of second screw members that are screwed to the support shafts and are manipulatable from the outside. | 07-29-2010 |
20100207496 | ANGULAR INDEXING APPARATUS FOR MACHINE TOOL - An angular indexing apparatus for a machine tool includes a rotating shaft, to which a rotationally driven member is secured; a housing, which surrounds the outer periphery of the rotating shaft and which is mounted to and removed from the body of the machine tool; bearings disposed between the housing and the rotating shaft; and driving means, disposed between the housing and the rotating shaft, and rotating the rotating shaft to index an angular position. The driving means includes drive motors, each having a motor rotor and a motor stator concentrically disposed around the rotating shaft in the housing. The drive motors are disposed in series and separated from each other in an axial direction of the rotating shaft. At least one of the housing and the rotating shaft is such that portions thereof are connected to each other so as to be capable of being divided from each other in the axial direction of the rotating shaft. The housing and the rotating shaft are made to correspond to the plurality of drive motors respectively, to connect portions thereof so as to be capable of being divided from each other. | 08-19-2010 |
20100258397 | ROTATIONAL RESISTANCE APPLYING DEVICE IN MAIN SHAFT DRIVING DEVICE FOR MACHINE TOOL - A rotational resistance applying device in which a hollow roller is provided between a first surface of a clamp piston (pressing member) and a second surface of a sliding disc (a press member), and in which a pressing force applied to the clamp piston acts upon the sliding disc through the hollow roller that press-contacts the first and second surfaces by displacement of the clamp piston. By this, rolling resistance of the hollow roller resiliently deformed by the pressing force causes a rotational resistance to be applied to a main shaft within a range allowing rotation. This makes it possible to prevent pulsation from being generated in the rotation of the main shaft. In addition, even if the pressing force is applied to the clamp piston, the hollow roller rolls, so that wear of the clamp piston and wear of the sliding disc can be restricted. | 10-14-2010 |
20100290854 | MACHINING HEAD FOR MACHINE TOOL - A machining head for a machine tool includes a spindle unit including a spindle to which a tool is attachable and a support head component that supports the spindle unit, the support head component including an index mechanism that rotates the spindle unit at least about an axis line extending perpendicular to a rotary axis line of the spindle in order to index an angular position of the spindle unit. The index mechanism includes a support shaft fixed to the spindle unit and rotatably provided within a housing of the support head component, and a drive motor for rotating the support shaft, the drive motor including a motor rotor and a motor stator, the motor rotor being disposed concentrically with the support shaft around the support shaft within the housing of the support head component and being linked to the support shaft, the motor stator surrounding the motor rotor to face an outer periphery of the motor rotor. The bearing for rotatably supporting the support shaft is disposed within the motor rotor in a radial direction within a range occupied by the drive motor in a rotary axis line direction of the support shaft. | 11-18-2010 |
20100310335 | WORKING HEAD FOR MACHINE TOOL - A machining head for a machine tool includes a spindle unit having a spindle to which a tool is attachable and a support head component. The support head component includes an index mechanism that rotates the spindle unit in order to index an angular position of the spindle unit. The support head component further includes first and second support segments containing respective support shafts disposed opposite to each other across the spindle unit such that shaft centers of the support shafts are aligned with the axis line. Each of the first and second support segments has a housing having a bearing member fixed thereto, the bearing member rotatably supporting the corresponding support shaft through a bearing. The support shaft in each support segment is supported by the corresponding bearing member in a manner such that the support shaft becomes movable together with the bearing member in an axial direction of the support shaft by releasing a fixed state between the support shaft and spindle unit and the fixed state between the bearing member and corresponding housing. | 12-09-2010 |
20100313708 | ANGULAR INDEXING APPARATUS FOR MACHINE TOOL - An angular indexing apparatus for a machine tool includes a housing, a rotating shaft, and a drive motor, the housing having a through hole, the rotating shaft ( | 12-16-2010 |
20100319487 | CLAMP DEVICE FOR ROTATION INDEXING APPARATUS FOR MACHINE TOOL - Intended is to unitize a clamp device for a rotation indexing apparatus for a machine tool, thereby facilitating the maintenance of the clamp device and the assembly of the indexing apparatus including the clamp device. The rotation indexing apparatus ( | 12-23-2010 |
20100329807 | ANGULAR INDEXING APPARATUS FOR MACHINE TOOL - An angular indexing apparatus for a machine tool includes a rotating shaft to which a rotationally driven member is secured; a housing, surrounding the outer periphery of the rotating shaft and mounted to and removed from the body of the machine tool; bearings disposed between the housing and the rotating shaft, and driving means disposed between the housing and the rotating shaft and rotating the rotating shaft to index an angular position. The driving means includes drive motors, each including a motor rotor and a motor stator concentrically disposed around the rotating shaft in the housing. The housing has wiring holes in a thick-walled internal portion of an outer cylinder surrounding the outer periphery of the rotating shaft. The wiring holes are provided along an axial direction of the rotating shaft. The wiring holes receive at least upstream portions in entire lengths in a drawing-out direction of cables connected to the driving motors. | 12-30-2010 |
20120011964 | INDEXING APPARATUS FOR MACHINE TOOL - A slide disk that is displaceable when the slide disk is bent toward a base section of a frame is provided at a main shaft, and a friction surface that can contact a pressing portion of the slide disk is provided at the base section. The pressing portion of the slide disk normally presses the friction surface to cause the pressing portion of the slide disk to normally press the friction surface, and hence a pressing force for applying to the main shaft a rotational resistance that permits rotation of the main shaft normally acts on the main shaft. Accordingly, even if the position of the center of gravity of a member to be rotated is deviated from a rotation axis of the main shaft, the rotational resistance can be applied to the main shaft. | 01-19-2012 |
20120024644 | MAIN SHAFT DRIVE FOR MACHINE TOOL - A main shaft drive includes a supply groove that opens to a friction surface, that extends so as to surround a main shaft within a contact range where the friction surface and a pressing surface oppose each other, and that includes an intersecting groove and a discharge opening. The intersecting groove extends in a direction of intersection with a circumference in which a rotational center of the main shaft is a center. The discharge opening is connected to a location that is outside the contact range. By opening a nozzle hole, used for supplying lubricant, towards the supply groove, as the main shaft rotates, four intersecting grooves move relative to the contact range, so that the lubricant is supplied to the four moved intersecting grooves. Therefore, the lubricant easily reaches a location within the contact range where the friction surface and the pressing surface oppose each other. | 02-02-2012 |
20120121356 | MACHINING HEAD FOR MACHINE TOOL - A machining head ( | 05-17-2012 |
20120217691 | CLAMPING DEVICE IN MAIN SHAFT DRIVING DEVICE FOR MACHINE TOOL - A clamping device in a main shaft driving device for a machine tool, which rotationally drives a main shaft, wherein the main shaft is rotatably supported by a frame. The clamping device includes a clamp piston, a pressure chamber and an operating fluid supplying mechanism, wherein the clamp piston has a first pressure-receiving surface and a second pressure-receiving surface, the first pressure-receiving surface receiving the spring force of a spring member, the second pressure-receiving surface receiving pressure of an operating fluid, wherein the operating fluid supplying mechanism includes a switching portion that selectively supplies the corresponding operating fluid from a common operating fluid supply source to at least one of a first pressure chamber and a second pressure chamber, the first pressure chamber being formed by the first pressure-receiving surface and the frame, the second pressure chamber being formed by the second pressure-receiving surface and the frame. | 08-30-2012 |