초록 ▼

A machine tool bolster includes a horizontal fixture support plate and a pressure-operable clamp device is vertically shiftably mounted to the underside of the plate and includes a clamp insert holder extending axially into a circular hole provided in the plate. A fixture is mounted to a locating pl

A machine tool bolster includes a horizontal fixture support plate and a pressure-operable clamp device is vertically shiftably mounted to the underside of the plate and includes a clamp insert holder extending axially into a circular hole provided in the plate. A fixture is mounted to a locating plate provided with a receptacle adapted to receive the clamp insert holder when the clamp device is raised relative to the plate. A rod is connected to a piston of the clamp device and extends vertically through the holder. The upper end of the rod is conically shaped and acts against complementary shaped clamp inserts radially slidably mounted in the holder to shift them outwardly against a conically flared portion of the locating plate receptacle so as to clamp the fixture to the bolster.

대표청구항 ▼

A machine tool bolster and fixture combination, comprising: said bolster including a fixture support surface having an opening extending therethrough; a pressure-operable clamp device received in said opening and serving as sole means for clamping the fixture to the support surface; said clamp devic

A machine tool bolster and fixture combination, comprising: said bolster including a fixture support surface having an opening extending therethrough; a pressure-operable clamp device received in said opening and serving as sole means for clamping the fixture to the support surface; said clamp device including an upper end defined by a clamp element holder, a plurality of clamp elements mounted in the holder for horizontal movement between respective extended positions, wherein they extend beyond an outer periphery of the holder, and respective retracted positions and a pressure operable means for simultaneously moving said clamp elements from their retracted to their extended positions when pressurized; said fixture including a locating plate engaging said support surface and being provided with a receptacle receiving said clamp element holder; said receptacle including surface means surrounding the periphery of said holder and being disposed for engagement by and for cooperating with the clamp elements as sole means for effecting the disposition of the locating plate in a preselected location against said locating surface when the clamp means are moved to their extended positions by said pressure operable means, such movement also effecting clamping of the locating plate against the support surface.