MANDREL FOR FINISHING WORKPIECES Russian patent published in 1998 - IPC

FIELD: mechanical engineering. SUBSTANCE: mandrel is made as stepwise pin where dog flange and clamping device are rigidly secured. The clamping device is made as expanding collet and has a nut and a washer. Opening of the collet has conical part, and mandrel has additional nut, clamping bushing and conical bushing on its pin. Conical bushing is provided with conical part which reciprocate conical part of the collet opening. Internal surface of the clamping bushing is provided with projections and external surface with grooves. Interaction of projections and grooves allows to the conical bushing freely exit the collet opening. EFFECT: enhanced reliability of fixing details. 3 cl, 1 dwg