Abstract: A camshaft shaping machine that is capable of providing a camshaft shaped with a cam surface inclined with respect to the cam axis is disclosed. The machine includes a pair of work heads (2) for clamping a camshaft workpiece (4) at its opposed ends rotatably about a longitudinal axis of the workpiece; an X-axis slide (8) movable along an X-axis that extends horizontally in a direction parallel to the longitudinal axis of the camshaft workpiece (4); and a Y-axis slide (11) movable along a Y-axis that horizontally extends in a direction orthogonal to the X-axis. An indexing table (13) is mounted on one of the X-axis and Y-axis slides (8. 11) so as to be turnable about a turning center (0) in a horizontal plane to angularly index and position, relative to the camshaft workpiece (4), a milling cutter (21) that is rotatably supported on a cutter head (20) to angularly mill the workpiece and thereby to permit an inclined cam surface to develop therein.

Abstract: A machining apparatus for improving the roundness of a work. The outer circumference of a work is divided into predetermined intervals, and a difference between the radius of that portion of the work after machined and a target radius thereof is detected for each of the intervals. The position of a tool which corresponds to every predetermined rotation angle is corrected on the basis of a detected radius difference at each of the intervals. The path of the tool is interpolation-computed on the basis of the corrected positions. The tool is turned along the interpolated path, so that the work is machined with a high precision.