Patent ID: 6010284
Filing Date: 2000-01-04
Classification: B23B,B23Q,Y10T

Abstract:
A boring machine comprising:means for fixing a workpiece of a semi-cylindrical shape, which is mounted on a central portion of a bed;a table mounted on said bed for reciprocal movement in right and left directions on said bed;a spindle mounted on said table, a cutting tool for cutting an inner surface of the workpiece being mounted on said spindle;means for carrying in said workpiece, which is mounted on said table; andmeans for carrying out said workpiece, which is mounted on said table;wherein said workpiece carry-in means receives the workpiece when said table is moved to one side, and then is moved toward the other side to transfer the workpiece to said workpiece fixing means; andwherein said workpiece carry-out means receives the workpiece, released from said workpiece fixing means, when said table is moved to said one side, and then is moved toward said other side to transfer the workpiece to a workpiece unloading position;in which said workpiece carry-in means includes a vertically-movable workpiece carry-in member having an upper surface serving as a support surface for placing the workpiece thereon; andin which a distal end portion of said spindle is rotatably supported by a distal end bearing mounted on said table, and said workpiece carry-in means is disposed on a same side of said distal end bearing as said one side.