Machine tool
AssigneesCitizen Watch Co., Ltd., Citizen Machinery Co., Ltd.
InventorsYasuhiro Kera, Noriyuki Asahara, Hiroshi Kasuya, Kyota Kotake
Life of this patent
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Abstract
A machine tool includes a movement device, which has a first feed shaft and a second feed shaft that mutually intersect, and a plurality of tools, which are driven by the movement device and respective blade edges of which are staggered stepwise. The blade edges of the tools are aligned with the second axis due to the inclination of the tools as a unit. The machine tool is capable of executing center level adjustment of a plurality of tools mounted on a tool post against a workpiece having a larger diameter, and is also capable of reducing wasted time in non-cutting operation via equal stroke lengths of the tools.
Claims12
A machine tool comprising:
- movement means having a first feed axis and a second feed axis that mutually intersect;
- and
- a tool post movable with the movement means, the tool post including a plurality of tools mounted thereon, each of said tools having a respective work-engaging edge, and said plurality of tools being movable as a unit along with movement of the tool post with the movement means;
- the tool post having a predetermined cut-in direction along which said plurality of tools mounted on the tool post are moved to adjust the depth of cut-in in a turning operation;
- said plurality of tools being mounted on the tool post so that machining of a workpiece is executed by movement of the tool post in the cut-in direction;
- machining of the workpiece being executed by a selected one of said plurality of tools by moving the tool post in the cut-in direction;
- each of said plurality of tools mounted on the tool post being selectively switchable by movement of said plurality of tools in a direction of a selection axis, said selection axis intersecting said cut-in direction;
- the tools of said plurality of tool being arranged side by side in the direction of said selection axis;
- each of said plurality of tools having a respective longitudinal axis that is inclined with respect to a predetermined reference plane;
- the respective work-engaging edges of said plurality of tools being staggered in a stepwise fashion in the cut-in direction;
- and
- said plurality of tools being arranged such said work-engaging edges thereof are substantially aligned with a straight line, said straight line extending through each of said work-engaging edges and being perpendicular to said predetermined reference plane.
Dependencies are inferred from the claim text.