Quick-action mandrel for machine tools

摘要

This quick-action mandrel enables mandrels to be reduced in size and the internal clamping of workpieces to be simplified. The workpiece with a cylindrical, conical or stepped bore is clamped continuously between conical clamping surfaces on the mandrel and a slip-on clamping sleeve. For narrow workpieces the clamping sleeve is equipped with a supporting member and can be used either way. With the mandrel accommodated between the tips, the clamping sleeve is stopped by means of cross-screws. Clamping members are formed on the clamping sleeve for accommodating pincers. When both tip pressure and clamping pressure are employed the clamping sleeve is accommodated in the pincers and the mandrel together with the workpiece is inserted into the bore of the clamping sleeve. The tip pressure effects a rapid clamping of the workpiece through the tip, mandrel, workpiece and sleeve.