37results about "Work driver" patented technology

A holder for the detachable assembly of cutting tools includes a clamping mechanism, which has a piston axially movable by applying oil pressure on either of two opposite sides thereof. A projection of the piston includes a cone surface with a moderate cone angle arranged to co-operate with a wedge body which is self-locking in relation to the cone surface to keep the cutting tool clamped, even when oil pressure is relieved. In order to guarantee such self-locking, transverse grooves are provided in the cone surface enabling friction-reducing oil to be evacuated from the interface between the cone surface and an inner, partially cone-shaped surface on the wedge body.

A power chucking system 10 comprises a chuck mounted on a headstock, the chuck with its jaws being caused to rotate by rotation or the machine spindle 6. The spindle 6 may be engaged with the pulley 1 in order to rotate a work piece retained within the chuck jaws. A clutch 2 may be used to disengage the spindle 6 from the pulley 1 and to lock the spindle 6 to the head stock. In this configuration, rotation of the pulley 1 will cause an actuator jack 7 to screw or unscrew, into or out of spindle 6, in order to open or close the chuck jaws to grip release the workpiece.

A lathe 1 comprises a bed 5, a headstock 10 having a housing 13 and a support base 14, a main spindle 11, a first tool rest 44, and a second tool rest 50. The support base 14 is formed so as to have a concave portion 14a on the upper portion thereof and so that the upper portion protrudes toward the second tool rest 50. The tool rest body 51 of the second tool rest 50 is configured so as to be movable into and out of a space formed downward from the upper portion of the support base 14. The housing 13 has a holding hole 13a for rotatably holding the main spindle 11, and installation portions 13b. The installation portions 13b are supported on the support base 14 in a state wherein a predetermined clearance is provided between the housing 13 and the concave portion 14a.

An automatic lathe is provided which is capable of rapidly and easily switching between machining of a material with a guide bush and machining of the material without the guide bush.

The automatic lathe has a guide bush support table (1) disposed closer to a tip side of a spindle (3) than a head stock (6); support table fixing means (15) for fixing the guide bush support table (1); a guide member (12) rotatably installed on the guide bush support table (1) so as not to move forward and backward; a guide bush (4) detachably fitted to the tip of the guide member (12); driving means (11) for rotating the guide bush (4); rotation transmission means (14a) and (31) for transmitting the rotation of the guide member (12) to the spindle (3); spindle moving means (7) for moving the spindle (3) forward and backward within the guide member (12); and spindle fixing means (17), (36) and (38) for positioning and fixing the spindle (3) at a specified position on the guide bush support table (1) when the guide bush (4) is removed from the guide member (12).

An automatic lathe is provided which is capable of rapidly and easily switching between machining of a material with a guide bush and machining of the material without the guide bush. The automatic lathe has a head stock (6) and a guide bush support table (1). The head stock (6) is provided with a spindle drive motor (8). The guide bush support table (1) is provided with a guide bush rotating motor (11). There are provided: support table fixing means (15) for positioning and fixing the guide bush support table (1); a guide member (12) rotatably installed on the guide bush support table (1) and regulated so as not to move forward and backward and having a through-hole formed for a spindle (3) to be inserted therein; a guide bush (4) detachably fitted to the tip of the guide member (12); and spindle fixing means (37) for positioning and fixing the spindle (3) on the guide bush support table (1) at a specified position when the guide bush (4) is removed from the guide member (12).

A spindle apparatus includes a rotatable first spindle (5, 32) to which a tool can be attached. The first spindle is supported in a base with high precision using an air hydrostatic bearing. The spindle apparatus further includes a second spindle (6, 33) capable of rotation about an axis substantially aligned with the axis of the first spindle, first connection means for electrically connecting a base side and the second spindle, and second connection means for electrically connecting the first spindle and the second spindle. Electrical connection between the base side and the first spindle is carried out via the first and second connection means. The first connection means is, for example, a brush (15, 36). The second connection means has a degree of mechanical freedom and is, for example, a flexible electrical wire (17, 39) or a helical spring (51).

A tire uniformity machine having a framework for receiving a tire to be tested, a rotatable chuck located within the framework and having a spindle driven by a motor directly coupled to the spindle to selectively cause rotation thereof, whereby the tire is chucked within the chuck assembly and caused to rotate by the motor. The motor is disposed in axial alignment with the spindle.

Cylindrical grinding equipment for grinding the side face of a columnar ingot, comprising at least three rollers, and a centering means consisting of an arm for supporting the rollers and coming into pressure contact with the rollers by advancing toward or retracting from the ingot from the horizontal direction, characterized in that the columnar ingot is mounted on a table vertically and transferred from the table onto a clamp before the end faces on the opposite sides of the ingot are held in the vertical direction by means of a pair of clamps, the ingot is then advanced or retracted by the centering means from the horizontal direction while being rotated about the axis by a rotating means, the axis of rotation of the rotating means is aligned with the central axis of the ingot by bringing the roller into pressure contact with the side face of the ingot, and then the ingot is ground by means of an abrasive wheel. Consequently, cylindrical grinding equipment and a grinding method capable of enhancing the grinding efficiency of an ingot are provided.

A C-axis driving device of a computer numerical controlled (CNC) lathing and milling machine includes a spindle, an encoder, a spindle motor, and a servo motor. The spindle has a clamping device and a transmission portion. This encoder connects with the transmission portion via an auxiliary timing belt. The spindle motor and the servo motor connect with the transmission portion via at least one driving timing belt. Only at most one of the spindle motor and the servo motor is to drive this transmission portion at any time during operation. So, it has a simple structure to achieve the clutching change function. It can save more space. And, it can significantly reduce the manufacturing cost.

A face driver has a body rotatable about an axis and a head rotationally fixed on the body and formed with a plurality of guides open axially forwardly toward a workpiece and radially offset from the axis. A centering rod axially shiftable in the body on the axis has a front-end point engageable with the face of the workpiece. A compression spring in the body urging the rod axially forward toward the workpiece, a driver disk has a front face engageable with the workpiece and a back face formed with a plurality of rearwardly open and radially extending grooves aligned with the guides. Respective support pins axially shiftable in the guides have heads engaged in the respective grooves so as to rotationally couple the driver disk rotationally to the body while permitting the driverd disk to tip with axial displacement of the pins.

A mechanical device for the fast exchange of jaws in a lathe plate providing an intermediate jaw support attached to the jaw holder with a straight support face and providing with a guide wherein the jaw is positioned and fixed precisely and eliminating the clearances found in the conventional method.

Disclosed herein is a workpiece ejecting device for a machine tool, in which the ejecting bar cannot be rotatably driven at the time of high velocity rotation of the spindle to thereby prevent occurrence of vibration, noise and frictional heat owing to the movement of the spindle, so that the machined workpiece can be ejected smoothly. According to the first embodiment of the present invention, there is provided a workpiece ejecting device for a machine tool for ejecting a workpiece clamped to a chuck installed at a spindle by means of a drawing tube connected to a chucking cylinder, the workpiece ejecting device comprising: a front bearing unit installed at an inner peripheral surface of a front end portion of the drawing tube to support the rotation of the drawing tube; and an ejecting cylinder located behind the chucking cylinder and installed directly on an axial line identical with that of the front bearing unit, and having an ejecting rod, wherein the ejecting rod is provided at a center axis thereof with at least one fluid passing opening through which fluid for removing alien materials is supplied, and a front end of the ejecting rod is installed to be supported by the front bearing unit.

A workpiece seat for the machining of bar-shaped workpieces by milling and turning. The workpiece seat has an elongated housing, a spindle rotatably supported in the housing, and an electric direct drive for the spindle. The drive rotor is fixed on the spindle and the drive stator is fixed in the housing. Clamping means are provided at the working end in the spindle for fixing a bar-shaped workpiece in the spindle. A connection unit is provided at the rear part of the housing for power supply. A fixing means is provided for fixing the spindle in the housing. To achieve high machining accuracy of thick bars and high clamping forces at reduced longitudinal dimensions, as well as relatively simple design, the fixing means is formed as a compact part and is arranged at the working end of the housing.

A clamping unit (1) for machine tools (2) with a housing (11) connected in a rotationally fixed arrangement with a machine spindle, (5) and a screw drive (13) that interacts with a draw rod (6) such that rotational movements are converted into translational movements, the housing (11) being provided with an output element by which rotational movements are transmitted to an actuator (21). The housing (11) has an input element in a rotating mounting, with the actuator (21) acting on the input element, and the input element (29) is in driving connection with a shaft (14) by means of intermediate elements (31), whereby to direct rotational movements of the machine spindle (5) via the clamping unit (1), and for adjustment movements of differently configured clamping devices, to be converted into axial adjustment movements and transmitted directly onto the draw rod (6). No complicated electrical control devices and programs are required for adjusting and adapting a power chuck (3) linked to the draw rod (3) to different operating conditions.

A material stock advancing apparatus for use with a turning and milling machine having a computerized numeric controller or lacking programmable capabilities. The material stock advancing apparatus generally comprising an elongate body of cylindrical form having first and second ends and an interior chamber for housing therein a plunger assembly operably working therewithin. The second end comprising means for attaching the elongate body to an external holding device such as a collet or chuck adapter seated in a headstock spindle assembly. The first end comprising an end plug having a threaded section situated in between external and internal ends thereof, with the threaded section being threadably attached to the first end to permit the internal end to substantially engage a portion of the plunger assembly and ensure proper axial positioning of the plunger assembly during cyclic operation. The plunger assembly comprising a ram operably acting longitudinally within the interior chamber of the elongate body via biasing means comprising at least one spring operably acting in conjunction with controller means used in opening and closing the external holding device, which collectively controls the advancement of material stock toward and beyond the second end to permit the machining thereof for conversion into a useful product.