machine tool, particularly for the manufacture of cast-iron pieces

摘要

A machine for removing flashing, burrs and the like from castings includes a base having a swivelable workpiece supporting table and inclined surfaces supporting a milling assembly on a saddle such that the saddle is movable, with the milling assembly, in a direction perpendicular to the axis of the spindle sleeve, and the assembly is swivelable on the saddle such that the sleeve axis remains parallel to itself. The spindle is also movable axially. An impact cutting tool is supported on the spindle sleeve and is driven by a piston and cylinder assembly to reciprocate rapidly in an operating position in which the impact tool axis is parallel to the spindle axis. The impact tool assembly is movable from the operating position to a rest position, either by retraction or by a pivoting mechanism. The apparatus can be automatically operated by using a pattern-following arrangement in which the workpiece itself is used as the pattern and the impact tool as the pattern follower. The impact tool has a small diameter to deburr small inside corners of castings.