AUTOMATISCHE GEWINDESCHNEIDMASCHINE

摘要

The cutting tool of a machine for automatically cutting screw threads is carried by a cross-slide mounted on the base of the machine. The step-by-step transverse feed of the tool is actuated by a push-rod operating against the cross-slide and backed by an adjustment vernier operating colinearly with the push-rod and mounted on the machine base. Between the vernier and push-rod are peripheral portions of a pair of discs which are mounted face-to-face for rotational movement step-by-step about an axis parallel to the line of action of the push-rod and for movement along said axis. The two faces of each disc are planar and non-parallel, and the angle between the two faces of the disc is the same for each disc. By adjusting the angular positions of the discs relative to each other and the angular position of the disc assembly about said axis, a desired programme of automatic thread-cutting operations can be pre-set.