Device for the automatic positioning of a tool

摘要

The invention provides automatic positioning of a tool carrier in a turret for machine tools. The turret comprises a support mounted on a base for rotation and against axial displacement and a tool carrier mounted on the support for rotation therewith. The tool carrier has a guide in alignment with an annular track on the base. A pair of coaxial rings of teeth on the base and the tool carrier are arranged for meshing engagement to locate the tool carrier on the base in a working position, and a bolt is glidably mounted in the guide and is displaceable along the track upon rotation of the tool carrier. The track has a plurality of recesseseach adapted to receive a projecting end of the bolt for locking the tool carrier in position. The projecting bolt end and the recesses have corresponding inclined camming surfaces for moving the bolt end out of the recesses upon rotation of the tool carrier, and the support has a like plurality of recesses each adapted to receive the opposite projecting end of the bolt when the first-mentioned projecting end is axially displaced out of the first-mentioned recesses upon rotation of the tool carrier.