Patent ID: 6971294
Filing Date: 2005-12-06
Classification: B23B,B23Q,Y10T

Abstract:
1. A numerical control lathe comprising: a first headstock and a second headstock which are arranged to face each other; a first spindle which is supported by the first headstock and a second spindle which is supported by the second headstock; a tool rest which has tools for processing works held by the first spindle and the second spindle; and a numerical control unit which controls rotation of the first spindle, rotation of the second spindle, and relative movement of the tool rest to the first headstock or the second headstock, wherein the tool rest has a first tool for processing a work held by the first spindle and a second tool for processing a work held by the second spindle, and is freely movable in a direction of a Z1-axis in parallel with a spindle axial line of the first spindle and in a direction of an X1-axis at right angles thereto, the second headstock is freely movable in a direction of an X2-axis and a direction of a Z2-axis in parallel with the X1-axis and the Z1-axis of the tool rest, and the numerical control unit superposes movement in the direction of the X2-axis necessary for processing the work held by the second spindle by the second tool on movement in the direction of the X1-axis, and superposes movement in the direction of the Z2-axis necessary for processing the work held by the second spindle by the second tool on movement in the direction of the Z1-axis.