Patent ID: 6981437

Claim:
A pipe cutting machine having a clamping device for holding a pipe to be cut and a pipe cutting apparatus for cutting the pipe by revolving a rotating disc-like cutting blade around the circumferential surface of the pipe held by the clamping device, the pipe cutting apparatus comprising: a main frame; a support member secured to the main frame; a revolution motion member of an annular shape rotatably supported by the support member; an arm pivotally supported on one side surface of the revolution motion member at one end thereof and rotatably carrying the cutting blade at the other end thereof; a swing motion member of an annular shape rotatably supported by the support member in axial alignment with the revolution motion member for swinging the arm; a rotation motion member of an annular shape rotatably supported by the support member in axial alignment with the revolution motion member for rotating the cutting blade; plural motors mounted on the main frame for respectively rotating the revolution motion member, the swing motion member and the rotation motion member; and plural rotation transmission mechanisms for transmitting rotational drive powers from the plural motors respectively to the revolution motion member, the swing motion member and the rotation motion member.