Cam Actuated clamping tool

摘要

A clamping device for clamping a punch block to a jaw of a punch press assembly where the action of clamping does not disturb the alignment between the punch block and the die. The device includes a pair of cams residing in a stacked relationship with each of the cams having a tapered aperture therethrough. A bolt passes through the tapered apertures of both cams and through a bore in the jaw to engage a threaded orifice in the punch block. Each of the cams has a generally cylindrical cam surface with a flat formed therein. Once the punch block is properly aligned with the die, the bolt is lightly tightened with the flats of the two cams in planar abutment with one another such that the cylindrical axes of the cams are separated by a first distance. The cams are then rotated with the lower one of the cams rolling on the surface of the jaw. Rotation of the cams moves the flats out of abutment with one another such that the axes of the cams become separated by a second distance which is greater than the first distance causing the upper one of the cams to bear against the head of the bolt thereby placing the bolt in tension while imparting no substantial force perpendicular to a longitudinal axis of the bolt.