Abstract: A zero-point clamping device for centering an object (2), the device comprising: a housing (4), a receiving opening (5), and two opposite clamping slides (7, 8) mounted axially displaceably in a bore (9) in the housing (4), which open into the receiving opening (5) during clamping and act on the object (2) to center it, wherein clamping is achieved by an actuating element (11) rotatably mounted in the housing (4), the axis of rotation (12) of which runs parallel to the clamping slides (7, 8), a through-opening (13) aligned perpendicularly to the clamping slides (7, 8), and a pivot pin (14, 15) inserted into the through-opening (13), one free end (16) of which engages in a guide groove (18) in a driving arrangement, and the opposite free end (17) of which is inserted into an abutment (21) associated with the housing (4) and is held in a tilting arrangement.

Abstract: A rim drilling and milling machine has a base (10), a column (20), a turret (30), a saddle (40), a table (50), and a fixture unit (60). The fixture unit (60) has a foundation (61) and four clamping seats defined as two first clamping seats (63A) and two second clamping seats (63B). The first clamping seats (63A) are slidably mounted on the foundation (61) along a first radial direction, and are disposed at positions diametrically opposite in the first radial direction. The second clamping seats (63B) are slidably mounted on the foundation (61) along a second radial direction perpendicular to the first radial direction, and are disposed at positions diametrically opposite in the second radial direction. The four clamping seats can clamp at four equiangular points of a wheel rim.

Abstract: A workpiece clamping system for a measuring machine includes a rotary table disposed in a workpiece rotation axis and includes a chuck for the concentric accommodation of a workpiece, a rotary drive for the rotary table, an upper centering tip mountable or mounted on the measuring machine in the workpiece rotation axis vertically opposed to the rotary table, and a lower centering tip mountable or mounted on the rotary table in addition to the chuck for accommodating a workpiece between the centering tips instead of in the chuck, wherein the lower centering tip is provided and formed to be concentrically clamped in the chuck instead of a workpiece, and in that the workpiece clamping system is provided with a conveying device for vertically or vertically and horizontally conveying the lower centering tip into and from its clamping position in the chuck.

Abstract: A system, in certain embodiments, includes a cutting tool, a drive and a chuck rotatable by the drive. The chuck includes multiple actuator arms, multiple jaws and multiple spring-loaded lock pins coupling the respective jaws to the respective actuator arms.

Abstract: A workholding chuck can use actuating members that pivot within a non-split unitary front bearing. The non-split unitary front bearing can include pockets in its central bore that can allow a spherical section of an actuator arm to be inserted into the bearing. The spherical section can include radially recessed areas to facilitate the insertion into the bearing. The jaws can be retained to the actuator arms through the use of a quick-release assembly. The quick-release assembly allows the jaws to easily and quickly be changed to allow the chuck to grasp different workpieces.

Abstract: It is an object to provide an aligner for centering a wafer and adjusting an angle of a notch or the like of the wafer while gripping edges of the wafer capable of attaining a shortened takt time and miniaturization of the apparatus by employing a mechanism capable of infinite rotation without being restricted by a rotational range, by eliminating cables and/or tubes at the rotating portion. The link mechanism for causing opening and closing movements of the gripping mechanism for gripping a wafer 1 is supported via a bearing 14 with respect to the link mechanism driving portion for driving the link mechanism so that only the gripping portion and the link mechanism can be rotated.

Abstract: A workholding chuck can use actuating members that pivot within a non-split unitary front bearing. The non-split unitary front bearing can include pockets in its central bore that can allow a spherical section of an actuator arm to be inserted into the bearing. The spherical section can include radially recessed areas to facilitate the insertion into the bearing. The jaws can be retained to the actuator arms through the use of a quick-release assembly. The quick-release assembly allows the jaws to easily and quickly be changed to allow the chuck to grasp different workpieces.

Abstract: The clamping apparatus comprises a chuck member and a pallet releasably attachable thereto. The chuck member has four centering grooves, arranged offset to each other by 90° around the central Z-axis, while the pallet has four correspondingly located centering pins. In each of the four centering grooves, one of the groove flanks serves for centering the associated centering pin of the pallet, while the other groove flank is constituted by a clamping member. Upon clamping the pallet to the chuck member, the associated clamping member engages a recess provided on the centering pin and pulls the latter one in Z-direction into the centering groove of the chuck member. Simultaneously, the clamping member also presses the centering pin against the other groove flank. Thereby, the pallet is positioned relative to the chuck member in X-, Y- and Z-directions and clamped to the chuck member.

Abstract: Cylinder mechanisms are provided for driving three jaw members each of which includes a cylinder hole having a long circular cross section, a piston which slides in the cylinder hole and has a long circular cross section, and a piston rod extending from the piston. The cylinder mechanisms are disposed at a position in the chuck body which is adjacent to corresponding jaw member in a state in which an axis of the cylinder hole in a direction parallel to a moving direction of the jaw member and a shorter diameter of the cylinder hole is directed in an axial direction of the chuck body.

Abstract: A new and improved powered rotating turntable with a universal, self-adjusting chuck for holding auto wheels and the like for polishing, which includes a pneumatically-adjusted, self-centering metal chuck for gripping and holding specialty wheel rims of motor vehicles for polishing. The chuck is self-adjusting, self-centering and is able to handle any diameter of wheel. With the self-adjusting, self-centering capability, this chuck eliminates the need to set up a new jig for gripping and holding a wheel rim each time a series of rims having a different diameter or style from the last series of wheel rims previously chucked-up and polished, thereby greatly improving the efficiency of the entire wheel polishing operation in terms of both time and cost of operation.

Abstract: Cylinder mechanisms for driving three jaw members each comprises a cylinder hole having a long circular cross section, a piston which slides in the cylinder hole and has a long circular cross section, and a piston rod extending from the piston. The cylinder mechanism is disposed at a position in the chuck body which is adjacent to corresponding jaw member in a state in which an axis of the cylinder hole in a direction parallel to a moving direction of the jaw member and a shorter diameter of the cylinder hole is directed in an axial direction of the chuck body.

Abstract: An equalizing chuck assembly for heavy duty application includes a chucking assembly having a plurality of rocker arms operably connected to an actuator by a plurality of toggle links. Jaw members are disposed on one end of the rocker arms and a counterweight is disposed on an opposite end of the rocker arms. The equalizing chuck assembly utilizes a plurality of equalizing plates interconnected between the actuator and the rocker arm to provide a degree of adjustment to accommodate eccentricities within the workpiece to be held by the chucking assembly.

Abstract: The invention relates to a chuck in which the clamping jaws are connected with the chuck body via radially deflectable arms. Two flat parallel arms are preferably provided for each clamping jaw. These arms act like leaf springs and form a parallelogram link arrangement for the associated clamping jaw. The clamping jaws and arms are preferably designed in one piece with the chuck body by forming slots in corresponding projections of the chuck body by means of wire erosion. The clamping jaws are actuated in accordance with the invention via a wedge face arrangement comprising a two-armed lever for each clamping jaw. A short arm of the lever engages the associated clamping jaw whereas a wedge face provided on a distinctly longer arm of the lever interacts with an actuating element, in particular a roller, of the axially displaceable actuating member.

Abstract: Apparatus for cleaning each threaded marginal end portion of large pipe. The apparatus has a cleaning head assembly which includes a rotatable member having circumferentially spaced cleaning brushes adjustably mounted thereon so that the cleaning brushes can engage and clean the opposed pipe surface at the opposed marginal terminal ends of a joint of pipe. Spaced plate-like members are axially arranged along a common shaft, and the opposed faces of the plate members have the cleaning brushes adjustably mounted thereto and arranged so that the common shaft can be rotated in a horizontal plane, thereby bringing the brushes of one of the plate members into cleaning engagement respective to the pipe threads, and thereafter the assembly is rotated 180.degree.0 in a horizontal plane, thereby bringing the other set of brushes into cleaning relationship respective to the opposed pipe end.

Abstract: A chuck comprises a body (10) rotatable about an axis (11) and at least one jaw (12) movable in a radial direction to clamp a workpiece in the chuck. At least one operating lever (14) is mounted on the body (10) and the, or each, lever is operable to move a jaw (12) radially. The, or each, lever is also movable axially with respect to the chuck body (10), to disengage from the associated jaw (12), enabling the associated jaw (12) to be removed simply and quickly from the chuck body (10) by movement in the radial direction.

Abstract: A chuck with radially reciprocating jaws is disclosed wherein each jaw is supported on a jaw support member movable relative to a base. An actuator is axially disposed in the base for axial reciprocation, the actuator having pivotally connected first and second links which extend radially from the actuator to engage the jaw support member. An eccentric cam connects each of the links to the jaw support member so as to translate the axial motion of the actuator into radial motion of the jaw member. One of the eccentrics has a fixed defined axis with respect to the base, while the other eccentric is received in bushings which are axially slidable with respect to the base.

Abstract: A chuck for heavy duty applications has a plurality of radially slidable jaw mounts each actuated by an L-shaped lever mounted for rocking motion about a supporting trunnion. The levers each have a leg engaging one of the jaw mounts and another engaging an actuator. An external lubricant receiving port is provided adjacent each trunnion and a multiple conduit lubricant distribution system is provided extending through the supporting trunnion and actuating lever. The chuck body also has a lubricant flow channel through which lubricant flows circumferentially of the chuck to assure uniform distribution, eliminating lubricant concentrations and eccentric weight distribution in the chuck.

Abstract: A multi jaw rotary chuck for lathes and the like comprising a body having front and rear portions and including a bore, a plurality of spaced jaw guides in the front portion of the body, a plurality of movable master jaw supports for the jaws of the chuck, the jaw guides each having one of the master supports slideably guided thereby, a plurality of actuator plates in the body each mounted in spaced radial planes intersecting and parallel to the axis of the bore and each actuator plate having first, second and third apexes, the first apex of the plate having a hole and including a first dowel pin mounted in the hole and extending outwardly on either side thereof transverse to the plane of the respective plate, the second apex of each plate having a hole and including a second dowel pin mounted in the hole and extending outwardly on either side thereof transverse to the plane of its respective plate and generally parallel to the first dowel pin, pivot means on each of the actuator plates journalled in the body

Abstract: A rotatable carrier for holding kinescope faceplates during processing includes a support plate having radially extending retention slots. Object retainers are arranged to slide in the slots and hold the object being processed. The retainers are biased outwardly away from the axis of rotation by biasing means. A tensioning band urges the retainers inwardly toward the axis of rotation so that centrifugal force acts against the tensioning bands rather than the springs.

Abstract: Apparatus for removing protective members from the threaded ends of pipe joints. A rotating head assembly is attached for longitudinal movement respective to a main frame having a motor mounted therewithin. The head includes a plurality of protector gripping jaws which are radially spaced from one another and aligned such that movement of the head assembly towards and away from the main frame causes the jaws to releasably grip the pipe protector. The rotating head assembly includes spaced parallel arms connected to cause the jaws to maintain the same relative position as the jaws are moved apart from one another to accommodate different diameter pipe. The apparatus can also be used to engage and remove pipe couplings as well as other threaded members. A second embodiment of the invention includes a cleaning head assembly mounted to the main frame which cleans the threads of both the box end and pin end of the pipe.

Abstract: A chuck for a machine tool is disclosed having radially rockable work clamping jaws. These jaws are rocked between work clamping and work releasing positions by radially extending levers engaging axially and rearwardly extending legs on the rockable supports for the jaws. The levers form a toggle-like mechanical lock with the legs of the rockable supports which lock will not permit the jaws to release even though the lever actuating mechanism is not subjected to any restraining force. Further, the disclosure provides a mechanism which is not biased to release by the centrifugal forces incident to the use of the chuck.

Abstract: There is disclosed a tool changer apparatus for rapid changing of a tool holder in a mill incorporating a draw bar having a gripper mounted on one end thereof for gripping a holding flange formed in a tool holder so retraction of such draw bar will close the collet on such flange to draw a centering taper formed in such tool holder into mating relationship with a complementary taper formed on one end of the mill spindle to center such holder. Incorporated on the opposite end of such draw bar is a tightener incorporating toggle links for holding the draw bar in its retracted position and operative upon retraction of the mill quill to release such toggle link to thereby extend such draw bar and release the tool holder from such gripper.

Abstract: A tool chuck includes a spindle having a barrel with an axial bore therein, and a collar slidably disposed about the barrel. A diametrical slot within the barrel receives a pair of opposed, pivoting toggles which engage and retain the end of a tool inserted in the barrel bore. The toggles are pivoted by a pair of linking members secured to a cylindrical member disposed in axially translatable fashion in the upper end of the bore. The cylindrical member is translated by the collar by means of an annular slot therein which receives opposed shoulders extending from the cylindrical member through another diametrical slot. Axial translation of the collar releases or secures a tool in the bore while the chuck is rotating at operating speed.