Numerical control apparatus

Details Numerical control apparatus Numerical control apparatus

1989-12-26

1992-03-10

Smith, Jerry

Boots, shoes, and leggings

36447432, 318579, 318570, G06F 1546, G05B 1918

Patent

active

050954407

ABSTRACT:
A numerical control apparatus is characterized by a structure in which: a machining program stores the final shape of a work as well as the shape of a material; designates the outermost point (an apex) on the work in a direction opposing a cutting direction as a cutting reference point; sets linear lines which are respectively lowered from the cutting reference point by cutting depths, and obtains the inter-sections of the lines and the material shape. The intersections thus obtained are classified into points where the tool enters the work zone and points where the tool emerges from the work zone, so that the tool can be moved at a predetermined cutting rate for a cutting operation between the point where it enters and the point where it emerges from the work zone while it is moved at a rapid traverse rate between the emerging point and the point where it re-enters the work zone. These operations are repeated until the tool touches the final machining shape, whereupon the tool is moved along the final machining shape at the predetermined cutting rate and cutting depth. In this manner, the cutting tool is prevented from idle operations in the feed zones where the material does not exist and the machining time can be reduced effectively.

REFERENCES:
patent: 4680719 (1987-07-01), Kishi et al.
patent: 4692873 (1987-09-01), Kishi et al.
patent: 4706200 (1987-11-01), Kishi et al.
patent: 4739489 (1988-04-01), Kishi et al.
patent: 4740902 (1988-04-01), Yoneda et al.
patent: 4745558 (1988-05-01), Kishi et al.

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