摘要:
An indexable workholding apparatus. The apparatus has a column member with at least one pair of workholding jaws operably attached thereto. The column member is rotatably and axially supported on a shaft member that is operably attached to an indexing assembly. The indexing assembly is constructed to axially displace the column along a longitudinal axis to a disengaged position upon the initial application of a rotary force to the shaft member. When in the disengaged position, the column can be selectively rotated about the axis by the further application of rotary force to the shaft member so that the column may be positioned in a predetermined angular position. A damping apparatus is attached to the shaft member and column for damping the return axial and rotary motion of the column and shaft member when the application of rotary force is discontinued. The indexing apparatus further includes a device for locking the article in a plurality of predetermined angular positions when the application of rotational force to the indexing assembly is discontinued.
摘要:
An indexing apparatus for indexing an article about an axis. The indexing apparatus is adapted to be removably attached to the article and is constructed to axially displace the article along the axis to a disengaged position upon the initial application of a rotary force to an indexing assembly housed within the indexing apparatus. When in the disengaged position, the article can be selectively rotated about the axis by the further application of rotary force to the indexing assembly so that the article may be positioned in a predetermined angular position. The indexing apparatus further includes a device for locking the article in a plurality of predetermined angular positions when the application of rotational force to the indexing assembly is discontinued.
摘要:
A rotary table with an index apparatus. The index apparatus includes first and second circular coupling gears disposed on a table in coaxial relationship with the rotational axis of the rotary table. The first coupling gear is fixed to the rotary table via a circular support member made of an elastic material while the second coupling gear is fixed to the table base. A third circular coupling gear is further disposed between the first and second coupling gears and the rotary table. The third coupling gear is moved by a cylinder mechanism between a first position in which the third coupling gear is separated from the first and second coupling gears and a second position in which the third coupling gear is brought into engagement with the first and second coupling gears while the force produced by the cylinder mechanism is transmitted to the rotary table via the third gear, first gear and support member so that the periphery of the rotary table is pushed against the guide surface of the table base.
摘要:
An improvement of spindle for vertical-horizontal machine tools, comprising a built-in motor type spindle, a rotating shaft, a drive device, and a locating-device, wherein the spindle is mounted on the machine tools by means of the rotating shaft; the rotating shaft maintains a 45.degree. incline toward the horizontal and vertical datum lines of the machine tools and is rotably driven by drive device to lead the spindle to change into vertical or horizontal manner; the locating device is provided for ensuring the spindle in accurate position. The characteristics of the invention are that the spindle mandrel is directly driven by a built-in motor within the spindle head; and the rotating shaft is defined to contain a hollow manner therein for the spindle pipelines and power cables to pass through its center.
摘要:
The tool-holder turret for lathes or like machining centers has a fixed support member (1; 52) bearing a rotary member (4; 51) to which there may be attached a tool-holder plate designed to bear a plurality of tools, each of which can brought into the operating position by the rotation of the rotary member, a drive motor (12; 54) also being provided, which is connected to a geared differential transmission unit (15, 18, 20; 47, 18, 20; 57, 64, 66) having three members, the first member, called the driver (15; 47; 57), being connected to the motor and controlling, on one hand, the opening and closing of the turret and, on the other hand, the rotation of its rotary member, the second member, which can be driven in rotation, of the differential unit (18; 18; 64) being connected to the rotary member and the third member, which can be driven in rotation, of the differential unit (20; 20; 66) being connected, via interposed cam transmission means (21, 23; 71, 72), to a rotationally fixed and axially movable member for relative engagement between the fixed member and the rotary member (7; 73), rotational locking members (29; 80; 34, 35; 40, 41; 76, 77) being provided for one of the members which can be driven of the differential unit for the transmission of movement to the other member and to the components associated therewith for the sequential control of the disengagement of the fixed member and the rotary member, the rotation of the rotary member into the preselected position and the reengagement of the fixed member and the rotary member, structure (97, 116) associated with the axially movable and rotationally fixed member also being provided and actuating the coupling of means for the transmission of movement to a rotary tool in the operating position.
摘要:
A rotatable turret for bringing any selected one of a plurality of tool holders into operative position relative to a workpiece, is characterized in that the turret can be rotated in either direction so that it need follow only the shortest path between the location of the old tool holder and the location of the new tool holder when changing from tool to tool. For this purpose, the turret has a rotatable hub with a plurality of blocks on its periphery slidable relative thereto in directions parallel to the axis of rotation, into and out of slots on a fixed member, the location of the slots corresponding to the operative locations of the tool holders. The blocks are all secured to the keeper ring of an annular electromagnet, whose strength is sufficient to retain the keeper ring attracted when the blocks are out of the slots, but whose strength is insufficient to retain the keeper ring when the blocks are in the slots. Springs act between the hub and the blocks to urge the blocks into the slots; and cam surfaces on the fixed member cam the blocks out of the slots against the action of the springs in one direction of rotation of the hub. A driving ring for the hub has abutment surfaces that contact the hub only in that one direction of rotation; whereas the same driving ring has abutment surfaces that contact only the blocks in the other direction of rotation, and then only when the blocks are withdrawn from the slots.
摘要:
A vertical support shaft supporting a tool support is slidably and rotatably supported in a base. A gear member is rotatably but non-slidably mounted on the support shaft and is provided with a threaded portion threadedly engaged with the base. A sleeve member having a rack engaging with the gear member is moved axially to lift the tool support to an upper position for an index operation. The sleeve member is provided with a notch to receive a resiliently urged lock shaft for restraining the axial movement of the sleeve member when the tool support is moved to the upper position.
摘要:
A precision heavy duty indexer characterized in that the indexing member thereof is positively locked to the indexer housing in desired precise axial, radial and angular indexed position by interengaged gear means of said indexing member and said housing, and is unlocked for indexing movement by disengaging said gear means, the gear means of said housing being carried by the outer peripheral portion of a laterally flexible pneumatic or hydraulically-actuated diaphragm having its inner peripheral portion fixed to the housing.
摘要:
The turret on a slide of a machine tool is indexible between a plurality of positions in a sequence which is selected by a program. The apparatus for effecting the indexing of turret has a control unit wherein a hydraulic motor can rotate an indexing shaft at different speeds which are determined by the reciprocable spool of a valve regulating the flow of hydraulic fluid from the motor. The spool can be biased against a cam on the indexing shaft by a spring and can be retracted by an electromagnet which is controlled by a decoding unit having several cams on a camshaft which is driven by the turret and several switches which are adjacent to the camshaft. The decoding unit selects the direction of rotation of the motor so as to insure that the indexing of turret from a preceding position to the next-following position does not involve a rotation through more than 180 degrees, and the decoding unit further determines the timing of deenergization of the electromagnet to thus enable the spring to urge the spool against the cam on the indexing shaft immediately before a follower of the spool is in register with a notch machined into the periphery of the cam on the indexing shaft and bounded by a surface which effects gradual deceleration of the motor to zero speed. The turret is automatically unlocked from the slide prior to starting of the motor and is automatically locked to the slide when the motor is arrested.
摘要:
There is disclosed index table construction having an index plate arranged to inter-engage with a base and raised by mechanism therein to a position above the base, rotated to a predetermined new position, and thereafter lowered into positive inter-engaged condition with such base, work pieces or tools carried by such plate being thus rotationally accurately translated to new positions.