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US 4,304,159 AGranted
Automatic screw machines
AssigneeTakayuki Nomura
InventorYoshifumi Tsuchiya
Life of this patent
Estimating the term…
Abstract
A machine tool for working elongated rod-like materials in rotation, particularly an automatic screw machine capable of working thin and long materials with a high degree of accuracy comparable to that of a headstock moving type automatic screw machine without involving any error in the indexing of the cutting tools for the work. The tool stand is reduced in weight, and movable along the longitudinal axis of the work, so that the machine is easy and inexpensive to manufacture.
Claims3
An automatic screw machine comprising:
- an indexing member provided in the center of rotation with a guide bush supporting work thereon, and supported on a frame for a tool stand rotatably about said guide bush;
- a plurality of tool holders disposed on said indexing member, and supporting cutting tools radially movably to and away from said work;
- an index driving mechanism for rotating said indexing member about said guide bush to bring one of said tool holders into a tool selecting position;
- and
- a tool driving mechanism provided in said tool selecting position for moving said one tool holder in said tool selecting position to and away from said work.
2 more elements
Dependencies are inferred from the claim text.