Patent ID: 6530568
Filing Date: 2003-03-11
Classification: B23B,B23Q

Abstract:
A clamping device (1) for securing a draw-in bolt (12) to a machine table or a base plate having a piston (6) axially displaceable in a recess of the machine table and being hydraulically actuable, and having a cover (9), secured to the machine table, in order to close off the recess in the machine table, the piston (6) and the cover (9) forming a receptacle (11) into which a draw-in bolt (12) can be inserted through the cover (9) and in which it can be secured by way of a clamping mechanism actuable by displacement of the piston (6), characterized in that there is inserted into the machine table recess an integral bushing (3) in which the piston (6) and cover cooperate and form a pressure chamber (5), the cover (9) being attached to the bushing and to the machine table by way of multiple bolts (27) passing axially through the cover and the bushing (3) and into the machine table, and at least one of the busing (3) and the cover (9) having centering surfaces (28) for positioning on the,machine table or the base plate.