Patent ID: 6868304

Claim:
A multi-function machine tool comprising: a main spindle which is rotatably disposed on a bed of the machine tool, and has workpiece attachment means for attaching the workpiece on the tip end thereof; a tool rest main body which is disposed movably in relative terms in a first linear direction parallel to the axial line of said main spindle, and in a second linear direction perpendicular to said first linear direction; a turning tool rest which is disposed on said tool rest main body, allows a mounting of a tool, and is disposed so that said turning tool rest can turn relative to said tool rest main body about a turning axis which has an axial line oriented in a direction that is perpendicular to both said first linear direction and said second linear direction; and control means for controlling the rotational motion of said main spindle about the axial line of said main spindle, a turning motion of said turning tool rest about the axial line of said turning axis, and the relative motion of said main spindle and said tool rest main body in said first linear direction and said second linear direction; wherein said control means can cause the turning motion of said turning tool rest about an arbitrary position that differs from the position of said turning axis by concurrently and synchronously causing the turning motion of said turning tool rest about said turning axis, and a circular-arc motion based on the relative motion of said tool rest main body in said first linear direction and said second linear direction.