Control method for bar material feeder of NC lathe and NC lathe
AssigneeCitizen Watch Co., Ltd.
InventorsYasuhiro Sasaki, Tadashi Fujinawa
Life of this patent
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Abstract
Provided is a method of controlling a bar supplying apparatus capable of automatically setting a timing of opening a run-out preventing chuck, a timing of cutting a bar short, and a timing of replacing the bar by the minimum input work. A controller 115 of an NC lathe 110 extracts length data (1) of a product and dimensional data (s) of a cutting width from a machining program, calculates the position of a feeder 123 on the basis of those data, and controls supply of a bar W to bar supporting units 128a to 128c, opening/closing of run-out preventing chucks 129a to 129d, and feeding and replacement of the bar W on the basis of the position of the feeder 123.
Claims13
A method of controlling a bar supplying apparatus provided for a numerically controlled lathe comprising:
- a headstock;
- a main spindle rotatably supported by the headstock and in which a through hole is formed along an axis;
- a tool post to which a tool for machining a bar projected from said main spindle through said through hole is attached;
- and a controller for controlling travel of said headstock or said tool post, and the bar supplying apparatus having a feeder for feeding said bar placed on a bar supporting unit toward said main spindle on a predetermined length unit basis, and a run-out preventing chuck for holding said bar supported on said axis by said bar supporting unit so as not to be run out to the side,
- characterized in that position data of said run-out preventing chuck, length data of said bar, length data in the axial direction of a product obtained by machining said bar, and dimensional data of cutting width for cutting said product off from said bar are preset in said controller, and
- said controller calculates the position of said feeder when said bar is positioned and when said bar is machined by feeder position calculating means and, on the basis of the calculated position of said feeder and each of said preset data, controls supply of said bar to said bar supporting unit, opening/closing of said run-out preventing chuck, and feeding of said bar.
A numerically controlled lathe comprising a headstock, a main spindle rotatably supported by the headstock and in which a through hole is formed along the axis, a tool post to which a tool is attached, and a controller for controlling travel of said headstock or said tool post,
- characterized in that the tool of said tool post is provided separately from said numerically controlled lathe, a run-out preventing chuck for holding said bar so as not to be run out to the sides is provided in a preset position, and a bar supplied from a bar supplying apparatus through the through hole in said main spindle is machined by the tool of said tool post, the bar supplying apparatus having a feeder for feeding said bar toward said main spindle on a predetermined length unit basis, and
- said controller has a function of calculating the position of said feeder when said bar is positioned and when said bar is machined by feeder position calculating means, and controlling supply of said bar to said bar supporting unit, opening/closing of said run-out preventing chuck, and feeding of said bar on the basis of the calculated position of said feeder, length data in the axial direction of a preset product, and dimensional data of cutting width for cutting said product from said bar.
Dependencies are inferred from the claim text.