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US 5,115,546 AGranted
Complex machining machine tool
AssigneeYamazaki Mazak Corporation
InventorsYukio Mitsukuchi, Shuichi Hashimoto
Life of this patent
Estimating the term…
Abstract
A complex machine tool has a single frame having a chip collecting space at a center portion thereof, first and second spindle stocks on the frame, relatively free to move and drive in a Z axis direction and holding the chip collecting space therebetween, workpiece spindles on the spindle stocks free to rotate and drive and facing each other, and tool rests. The tool rests have turrets and can assume various kinds of movement. Complicated and varied types of machining can be performed combining the rotation control of the workpiece spindles and the spindle stocks.
Claims11
A lathe, comprising:
- a frame;
- first and second spindle stocks having first and second workpiece spindles rotatably supported thereby, respectively, said first and second spindle stocks being disposed on said frame so as to face each other and so as to be free to move only in a direction along axis centers of said first and second workpiece spindles, said axis centers of said first and second workpiece spindles being colinear;
- first and second workpiece holding means provided with said first and second workpiece spindles, respectively, for holding a single workpiece between said first and second spindle stocks;
- at least one tool rest capable of selectively positioning tools for said first and second workpiece holding means;
- first and second feed screws rotatably disposed on said frame, said first and second spindle stocks being engaged with said first and second feed screws, respectively, for independently moving said first and second spindle stocks in said direction of said axis centers of said workpiece spindle by rotation of said feed screws;
- first and second means for rotatably driving said first and second feed screws, respectively, connected with said first and second feed screws;
- a rotation angular quantity detecting means for electrically detecting the angular rotation of both said first and said second feed screws, and for outputting a signal corresponding to the angular rotation of said first and said second feed screws;
- a synchronous movement control means for controlling at least one of said first and said second means for rotatably driving said first and said second feed screws so that said first and second spindle stocks synchronously move at the same speed in the same direction upon rotation of said first and second feed screws by said first and second means for rotatably driving while a single workpiece is held between said first and second spindle stocks on the basis of said signal outputted from said rotation angular quantity detecting means;
- and
- synchronous movement command means for commanding said synchronous movement control means to synchronously move said first and second spindle stocks.
7 more elements
A lathe, comprising:
- a frame;
- first and second spindle stocks having first and second workpiece spindles rotatably supported thereby, respectively, said first and second spindle stocks being disposed on said frame so as to face each other and so as to be free to move only in a direction along axis centers of said first and second workpiece spindles, said axis centers of said first and second workpiece spindles being colinear;
- first and second workpiece holding means provided with said first and second workpiece spindles, respectively, for holding a single workpiece between said first and second spindle stocks;
- at least one tool rest capable of selectively positioning tools for said first and second workpiece holding means;
- first and second feed screws rotatably disposed on said frame, said first and second spindle stocks being engaged with said first and second feed screws, respectively, for independently moving said first and second spindle stocks in said direction of said axis centers of said workpiece spindle by rotation of said feed screws;
- first and second means for rotatably driving said first and second feed screws, respectively, connected with said first and second feed screws;
- and
- a clutch means for operably connecting said first and second feed screws together so that said first and second spindle stocks move at the same speed in the same direction upon rotation of one of said first and second feed screws by one of said first and second means for rotatably driving while a single workpiece is held between said spindle stocks and for disconnecting said first and second feed screws.
5 more elements
Dependencies are inferred from the claim text.