Automatic programming system

Details Automatic programming system Automatic programming system

1988-06-15

1990-07-03

Smith, Jerry

Boots, shoes, and leggings

364188, 36447422, 36447423, 36447426, G05B 19403, G06F 304

Patent

active

049396358

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

This invention relates to an automatic programming system. More particularly, the present invention is directed to an automatic programming system for automatically creating an NC part program, executed by an NC unit, from a figure definition statement and motion definition statement prepared in an automatic programming language.
In an automatic programming apparatus for creating NC data using an automatic programming language such as APT or FAPT,
(a) a part program based on the automatic programming language is created by defining points, straight lines and circular arcs using simple symbols (this is referred to as "figure definition"), and then defining a tool path using the defined points, straight lines and circular arcs (referred to as "motion statement definition"), and
(b) the part program based on the automatic programming language is subsequently converted, by using an NC data output table, into NC data comprising NC data (EIA codes or ISO codes) in a format capable of being executed by an NC unit.
For example, in the creation of a part program for moving a tool RB along a profile comprising straight lines and circular arcs shown in FIG. 3, figure definition is performed by defining a tool starting point P.sub.1, cutting starting point P.sub.2, straight lines S.sub.1 and S.sub.2 and circular arc C.sub.1 . . . as follows:


______________________________________ PART, @ REIDAI (1) MCHN, MILL, ABS (2) P.sub.1 = x.sub.1, y.sub.1 P.sub.2 = x.sub.2, y.sub.2 P.sub.3 = x.sub.3, y.sub.3 S.sub.1 = P.sub.2, P.sub.3 (3) C.sub.3 = x.sub.4, y.sub.4, r.sub.1 (4) P.sub.5 = x.sub.5, y.sub.5 S.sub.2 = P.sub.5, C.sub.1, B (5) ______________________________________ arcs, a motion statement is defined in automatic programming language. The motion statement is described by the following and in the view of the tool path:


______________________________________ CUTTER, 0.3 (6) S0800 (7) TLLFT (8) FROM, P.sub.1 (9) RPD, TO, S.sub.1, P.sub.2 (10) FCOD, 500 (11) S.sub.1 C.sub.1 S.sub.2 . . . FINI PEND ______________________________________ subsequently automatically creates and outputs NC data having an EIA code or ISO code execution format while referring to an NC data output table.
In the foregoing,
(1) instructs the start of the part program, with "REIDAI" being the header.
(2) indicates the type of NC machine. "MILL" is used in case of milling, "TURN" in case of turning, and "CUT" in case of a wire-cut electrical discharge machine. "ABS" indicates an absolute command. ("INCR" would be used for an incremental command.)
(3) signifies a straight line passing through points P.sub.2 and P.sub.3.
(4) signifies a circular arc having a center (x.sub.4,y.sub.4) and a radius r.sub.1.
(5) signifies a lower tangent line (straight line) of two tangent lines passing through point P.sub.5 and contacting the circular arc c.sub.1. In the case of the upper tangent line, the alphabetic character A would be used instead of B.
(6) represents a beam command which commands a beam diameter of 0.3 mm.
(7) represents a command which commands a spindle rotational speed of 800 (rpm).
(8) is a command for offsetting the tool to the left of the direction of movement. ("TLRGT" would be used to offset the tool to the right of the direction of movement.)
(9) is a coordinate system setting command which indicates that the starting point is P.sub.1.
(10) is a command for positioning the cutter in such a manner that the tool will contact the straight line S.sub.1 at point P.sub.2 without passing this straight line.
(11) is a velocity command indicating that the feed velocity is 500 mm/min.
Thus, according to the automatic programming method, symbols are previously attached to shape elements such as straight lines, circles and points constructing the shape of a part. These shape elements are defined (figure definition), a motion definition statement is subsequently created using the symbols attached to the shape elements, and an NC part program is created automaticall

REFERENCES:
patent: 4451895 (1984-05-01), Sliwkowski
patent: 4627003 (1986-12-01), Kishi et al.

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