Patent ID: 6902465

Claim:
A grinding machine for grinding a non-circularly symmetric surface on a workpiece, the machine comprising means for receiving the workpiece in such a way as to enable the latter to be rotated about a first axis, a tapered grinding wheel mounted on a spindle which is angled relative to the first axis, drive means for rotating the wheel about a second axis, feed means for bringing the wheel into contact with the workpiece to define a cutting line where the wheel contacts the workpiece, characterized in that the machine includes orientation means operable to cause a rocking movement of the wheel and spindle relative to the workpiece as the latter rotates, and in that the orientation of the cutting line relative to the first axis is one in which it is parallel to said axis at any position around the first axis, whereby the orientation of the cutting line is maintained relative to the first axis and to the second axis relative to the cutting line.