Patent ID: 7237310
Filing Date: 2007-07-03
Classification: B23B,B23Q,B24B,Y10T

Abstract:
1. A composite lathe comprising: a bed whose mounting surface is horizontal; a first spindle headstock disposed on the mounting surface, said first spindle headstock is in a tunnel shape; a second spindle headstock disposed on the mounting surface to be coaxial with said first spindle headstock and to be movable in a Z-axis (left/right) direction; and a tool post disposed on the mounting surface between said first and second headstocks to be movable in an X-axis (up/down) direction and the Z-axis direction, the tool post including a supporting member capable of moving into/out of the tunnel shape of said first spindle headstock; and a third spindle disposed on said bed to be movable in the X-axis direction, a Y-axis (front/back) direction, and the Z-axis direction, wherein said tool post supports a turret to which a plurality of tools are attached, so as to allow the turret to move in the X-axis direction, and a cutting point of said tool post is positioned vertically under a straight line connecting axes of said first spindle headstock and said second spindle headstock, and an X-axis stroke of a cutting point of said third spindle overlaps an X-axis stroke of said tool post by a half or more of the X-axis stroke of said tool post.