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.

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.

When a wheel clamp is used, width of a wheel is detected first, a first servo motor drives a lead screw to rotate, a supporting block and a lifting plate are automatically adjusted to appropriate heights via a nut, a manipulator puts the wheel onto end face blocks, air-tight devices are pressed down, an oil cylinder drives a chuck so that clamping jaws expand the central hole of the wheel, meanwhile, four air cylinders drive clamping blocks to compact outer side of the wheel, and the wheel is completely positioned; at this moment, a bolt hole of the wheel can be drilled; after machining, second servo motor drives right shaft, right lug plate and a turnover part to rotate certain angles via second decelerator; high pressure oil is introduced into cavities between ipsilateral expansion sleeves and end covers, and left and right shafts are separately locked by ipsilateral expansion sleeves.

A chuck device capable of efficiently changing a welding tip and nozzle. The chuck device includes a rotatable chuck base, an engagement part fixed to the chuck base so as to rotate integrally with the chuck base and can engage an engagement surface of the welding tip, the engagement part allowing the welding tip to rotate with the chuck base when the chuck base is rotated while engaged with the engagement surface, and a plurality of fingers provided to the chuck base to be openable and closable and can hold the welding tip and the nozzle, the plurality of fingers being capable of moving in directions approaching and separating from the engagement part.

A work holder includes: a first holding part having three attracting members that are arranged circumferentially apart from each other to attract an axial end face of an annular work; and a second holding part having a contacting member that is held in contact with an inner periphery or outer periphery of the work and restricts radial movement of the work.

A chuck device capable of efficiently changing a welding tip and nozzle. The chuck device includes a rotatable chuck base, an engagement part fixed to the chuck base so as to rotate integrally with the chuck base and can engage an engagement surface of the welding tip, the engagement part allowing the welding tip to rotate with the chuck base when the chuck base is rotated while engaged with the engagement surface, and a plurality of fingers provided to the chuck base to be openable and closable and can hold the welding tip and the nozzle, the plurality of fingers being capable of moving in directions approaching and separating from the engagement part.

A gripping device (100) for holding, centring and/or clamping a micromechanical or horological component (200) in a chamber delimited by a collet including at least one movable jaw (2) and at least one stationary jaw (3), wherein some of the movable jaws (2) and/or stationary jaws (3) include a reference surface (20) to support a component (200) bearing frontally thereagainst, and the gripping device (100) includes both, on the one hand, stationary jaws (3) including the reference surface (20) to support the component (200) bearing thereagainst, and movable jaws (2) for centring and/or clamping the component (200), and on the other hand a vacuum generator (60) for creating the vacuum in the clamping chamber. Also a related method.