Arrangement for changing tool-supporting tool holders on a machine tool assembly

Claim 1

Arrangement for changing tool-supporting tool holders on a machine tool assembly, such as a lathe, comprising at least one workpiece holder; a tool turret having at least two tool holder clamping means and being displaceable relative to said workpiece holder; a tool holder magazine positioned above said turret and displaceable in directions corresponding to said turret displacement; a tool holder transfer means for transferring said tool holders back and forth between the magazine and the turret, said tool holder transfer means including gripper means for the tool holders to be transferred and being adapted to, on changing being effected, transferring a particular tool holder out of a clamping position in said magazine in a single rectilinear linear movement into a clamping position on said turret and conversely; each said clamping means on said turret being provided with at least one rib extending in the direction of the liner movement thereof and each tool holder being provided with a complementary longitudinal recess, said longitudinal recess and said rib, and the direction of said linear movement being at a small acute angle with respect to each other, so that the ribs and the longitudinal recess are separated from each other perpendicular to the longitudinal direction of the rib and the longitudinal recess when the particular tool post is displaced by said tool holder transfer means from a change position identical with the clamping position on said turret to the magazine, thereby performing said linear movement.