Abstract: An automatic positioning and clamping tool for mounting in a CNC Tilting Rotary Table for positioning and clamping a wheel rim for processing by a cutting tool includes a base, an upright post mounted at the base, air leakage detection units mounted on the base for supporting the wheel rim and detecting an air leakage, clamping devices mounted on the base for clamping the border edge of the wheel rim, a lateral chip conveyor, nozzles mounted around the periphery of the lateral chip conveyor, a vertical hydraulic chuck mounted around the upright post for moving a positioning gripper into abutment against the bore wall of the center bore of the wheel rim, and fluid nozzles mounted in the vertical hydraulic chuck for flushing away chips during processing. Thus, the invention is a compact structure with functions of air leakage detection, wheel rim automatic positioning and clamping and chip removal.

Abstract: A multiple pivoted lathe chuck jaw assembly utilizes a plurality of baseplates each having one or more sub-jaws pivotably attached thereto. Each baseplate is configured for attachment to, or is part of, the radially movable elements of a lathe chuck. Further, each baseplate has two pivotably attached sub-jaws. Each sub-jaw has two compression and two expansion workpiece gripping surfaces extending generally outwards from the front face of the baseplate: a first tier compression gripping surface, a second tier compression gripping surface, a first tier expansion gripping surface, and a second tier expansion gripping surface. The gripping surfaces each approximate a curved shape that matches the shape of a circle of a given radius allowing the sub-jaws to pivot and self-align to the workpiece surface for maximum surface contact and gripping force. Force-directed serrations can provide additional holding force toward the face of the chuck.

Abstract: A system pendulum apparatus (13) is provided for a chuck and a method is provided for the clamping of workpieces with a pendulum element (16) and a basal element (30). An axially swivelable connection is provided between the pendulum element and the basal element by way of an element connection device. A swivel range a of the pendulum element can be restricted by a restriction device (39), and the pendulum element can be returned by a return device to a central position of the swivel range. The pendulum element can be fixed within the swivel range by a fixing device (23). The basal element can be joined by a joining device to one jaw of a chuck (10). The pendulum element has a clamping device with two exchangeable clamping elements (20), which are displaceable and fixable.

Abstract: A saw blade clamping arrangement for a power tool includes a clamp support, a biasing member and an actuation member. The clamp support is interconnected with the drive shaft for reciprocating motion with the drive shaft relative to a housing of the power tool. The clamp support is configured to selectively receive a saw blade of the power tool in various orientations. A release lever is carried by the housing and is manually rotated to move a control member between a first position in which the saw blade is coupled to the drive shaft and a second position in which the saw blade may be displaced from the drive shaft. In at least one of the orientations, the saw blade is positioned offset from the drive shaft and proximate one of the side walls of the tool housing to allow for flush cutting of a work piece.

Abstract: A chuck grips the housing of a hub assembly to hold it fast and further engages a hub spindle that is within the housing and rotates the spindle on a bearing that is between it and the housing so that a flange on the hub may be machined with precision. The chuck includes a fixed base that carries jaws which clamp down on the housing to firmly hold the housing. It also includes a rotatable base and an arbor carried by the rotatable base and engaged with the spindle of the hub to impart the rotation of the hub. The arbor can shift radially with respect to the rotating base to accommodate misalignment between the axes of rotation for the hub and the rotating base. A bearing lies between the arbor and rotating base to resist an axially directed force applied to the arbor to expand it in the hub spindle.

Abstract: A plurality of clamping motion elements with clamping jaws are moved out of an initial position towards a workpiece under a low operating pressure and caused to bear thereagainst. When all the clamping jaws bear uniformly against the workpiece, a full clamping pressure is applied to clamp the workpiece fast in position.

Abstract: A chuck assembly which can chuck thin and brittle workpieces that differ widely in size with high accuracy and reliability without warping them. The chuck assembly includes a tubular chuck body having three first cylinders and a plurality of second cylinders arranged along a circumference in a plane perpendicular to the axis of the chuck body at equal angular intervals. The cylinders have pistons adapted to protrude under oil pressure. The three first cylinders are also arranged at equal angular intervals. The chuck assembly further includes a pressure-biasing means for applying, independently of the oil pressure, pressure to the pistons of the first cylinders against a workpiece, so that the piston are less likely to be retracted by the reaction force from the workpiece. That is, this chuck assembly has a self-centering function.

Abstract: A chuck has a chuck body, an actuating element limitedly axially displaceable in the body, a first set of guide pistons axially fixed in the actuating element, angularly spaced about the axis, and each forming a guide passage extending at a small acute angle to the chuck axis, and a second set of guide pistons limitedly axially movable in the actuating element, angularly spaced about the axis, interleaved with the axially fixed guide pistons, and each forming a guide passage extending at a small acute angle to the chuck axis. Respective jaw bolts slidable in the passages each have an outer end projecting forward from the chuck body and a rear end axially coupled to the chuck body. The outer ends of the jaw bolts of the axially fixed pistons define a fixed-jaw circle centered on the chuck axis and the outer ends of the jaw bolts of the axially movable pistons define a movable-jaw circle centered on the axis.

Abstract: A lathe chuck assembly is configured for high-speed turning operations. The assembly includes a riser adapter and a yolk plate movably connected with respect to the riser adapter. First, second and third cam arms are connected to the yolk plate for grasping a workpiece for turning operations. Each cam arm includes a cam slot formed therein. A face plate is mounted to the riser adapter. The face plate includes first, second and third cam arm openings formed therein for receiving cam pins for cooperation within the respective cam slots. The face plate includes a locally thickened cross-sectional area surrounding each cam arm opening for added structural integrity and a plurality of locally thinned cross-sectional areas spaced across the face plate for weight reduction. A web structure of substantially uninterrupted cross-sectional thickness is provided for structural integrity at high rotational speeds.

Abstract: A chuck apparatus is operative to center and lock an aluminum wheel in a lathe having a machining centerline. The chuck includes a face plate adapted for rotation about the centerline, and first, second and third radial slide blocks slidably movable perpendicularly with respect to the centerline and adapted to receive locators. First, second and third clamps are equally spaced about the periphery of the face plate and are adapted for applying a clamping force to the aluminum wheel in a direction parallel to the centerline. The slide blocks are actuated independently of the clamps to facilitate centering of the wheel prior to clamping. The slide blocks are selectively movable in a first direction radially outward from the centerline for causing the locators to engage the wheel and a second direction radially inward to cause the locators to engage the wheel.

Abstract: A device for clamping a workpiece has a base body rotatable together with a spindle of a machine tool. The base body has a hollow portion defining a space. A piston is mounted in the space so as to be movable back and forth by fluid supplied through passages communicating with chambers defined on both sides of the piston, respectively. A diaphragm is provided over a front portion of the base body with a predetermined gap left therebetween. A peripheral portion of the diaphragm is secured to the base body, while a central portion of the diaphragm engages the piston. A plurality of clamping jaws are provided on the front surface of the diaphragm.