A collet for a tool including an outer nut having a grip and defining a collet bore configured to receive a chuck. The collet bore includes a collet engagement surface engageable with the chuck to selectively secure a tool accessory. The collet also includes a spring having an extension portion engageable with an external part of an output shaft of the tool or an internal part of the outer nut to provide feedback to a user regarding securement of the collet.

A work seating detection device including a detection hole formed to discharge air from a work seating face of a chuck, a detection flow path connecting an air supply source supplying compressed air and the detection hole, a pressure switch detecting a secondary-side pressure of a throttle portion formed in the detection flow path, and a pressure regulator adjusting the secondary-side pressure is provided. An adjustment flow path branching on a secondary side of the throttle portion is formed in the detection flow path, an on-off valve is disposed at the adjustment flow path, an adjustment block provided with an adjustment face pressing an adjustment gauge is integrally formed in a tip portion, and an adjustment hole having the same size as the detection hole and communicating with the adjustment flow path is formed in the adjustment block for an opening portion to be positioned in the adjustment face.

A counter bearing for machining spindles of machine tools has at least one expansion bushing with an elastically deformable wall that delimits at least one pressure chamber. The pressure chamber accommodates a pressure medium. A supply line for the pressure medium opens into the pressure chamber. A pressure conduit opens into the pressure chamber. A mechanically actuatable pressure element is disposed in the pressure conduit and actuated by an actuating tool. A piston is slidably arranged in the pressure conduit and actuated by the pressure element, wherein the piston loads the pressure medium.

The invention relates to a device controlling a chuck of a machine tool and an auxiliary equipment thereof, thereby facilitating a setup work. Gripping and releasing of a work are confirmed by registering a work gripping position and a work releasing position of a chuck, a kind of a used chuck, and a gripping direction of a work in an external memory device every product type of the work, transferring the work gripping position and the work releasing position in correspondence to the product type to a controller of a machine tool displaying them on a display of an operator control panel, detecting a position of an operation rod opening and closing a claw of the chuck by a stroke sensor, referring to the gripping position of the work, and detecting conformity of the detecting position and set values of the work gripping position and the work releasing position.

This device is provided with: a main shaft (20) onto which a tool (100) is detachably mounted; a rod (30) slidably supported by the main shaft (20) and configured to attach or detach the tool (100) to or from the main shaft (20) through a sliding action; a fluid channel (32) formed in the rod (30); fluid feed device (51, 70) configured to feed a fluid into the fluid channel (32); a plurality of fluid channels for seating detection (24) for detecting when the main shaft (20) and the tool (100) are in a seated state, the fluid channels for seating detection (24) being formed in the main shaft (20) so as to communicate with the fluid channel (32) when the rod (30) is positioned at a first position; and a plurality of fluid channels for cleaning (25) for cleaning seating portions of the main shaft (20) and the tool (100), the fluid channel for cleaning (25) being formed in the main shaft (20) so as to communicate with the fluid channel (32) when the rod (30) is positioned at a second position different from the first position.

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.

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.

The invention relates to a device controlling a chuck of a machine tool and an auxiliary equipment thereof, thereby facilitating a setup work. Gripping and releasing of a work are confirmed by registering a work gripping position and a work releasing position of a chuck, a kind of a used chuck, and a gripping direction of a work in an external memory device every product type of the work, transferring the work gripping position and the work releasing position in correspondence to the product type to a controller of a machine tool displaying them on a display of an operator control panel, detecting a position of an operation rod opening and closing a claw of the chuck by a stroke sensor, referring to the gripping position of the work, and detecting conformity of the detecting position and set values of the work gripping position and the work releasing position.

This device is provided with: a main shaft (20) onto which a tool (100) is detachably mounted; a rod (30) slidably supported by the main shaft (20) and configured to attach or detach the tool (100) to or from the main shaft (20) through a sliding action; a fluid channel (32) formed in the rod (30); fluid feed device (51, 70) configured to feed a fluid into the fluid channel (32); a plurality of fluid channels for seating detection (24) for detecting when the main shaft (20) and the tool (100) are in a seated state, the fluid channels for seating detection (24) being formed in the main shaft (20) so as to communicate with the fluid channel (32) when the rod (30) is positioned at a first position; and a plurality of fluid channels for cleaning (25) for cleaning seating portions of the main shaft (20) and the tool (100), the fluid channel for cleaning (25) being formed in the main shaft (20) so as to communicate with the fluid channel (32) when the rod (30) is positioned at a second position different from the first position.