Boots – shoes – and leggings
Patent
1989-04-17
1991-08-27
Smith, Jerry
Boots, shoes, and leggings
364188, 36447422, G05B 19403, G06F 304
Patent
active
050438654
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a method of revising a profile, and more particularly, to a profile revising method for revising a profile generated by joining, in order, figure elements specified by figure definition statements in an automatic programming language.
In an automatic programming system for creating numerical control (NC) data using an automatic programming language such as APT (automatic programming tools) or FAPT.
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"). The part program based on the automatic programming language is subsequently converted 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 along a part profile A comprising straight lines and a circular arcs shown in FIG. 6(a), figure definition is performed by defining a point P.sub.1, straight lines S.sub.1, S.sub.2 and S.sub.3 and a circle Cl (see FIG. 6(b)), which are necessary for defining a part profile, as follows using a keyboard or tablet: picked in order, e.g., end points, etc., of the part profile A are designated by a motion statement definition to define a tool path along which a tool is moved.
In the foregoing,
(1) signifies a circle of center (x.sub.3,y.sub.3) and radius r.sub.1 ;
(6) signifies a straight line passing through points P.sub.1, P.sub.2 ;
(4) signifies a left-side tangent line (straight line) of two tangent lines passing through point P.sub.1 and contacting the circle C.sub.1 ; and
(5) signifies a right-side tangent line (straight line) of two tangent lines passing through point P.sub.2 and contacting the circle C.sub.1. The character L is a qualifier meaning "left", and the character R is a qualifier meaning "right". There are two methods of figure definition. A first method entails defining points, straight lines and circles using absolute numeric data. A point is defined as defined as (x.sub.1,y.sub.1), (x.sub.2,y.sub.2) through which the straight line passes (see FIG. 7(b)), and a circle is defined as the circle (see FIG. 7(c)).
The second method entails defining points, straight lines and circles using other elements (points, straight lines and circles) that have already been defined. For example, point P.sub.1 is defined as follows with reference to FIG. 7(d): A is the qualifier meaning "upper"), and circle C is defined as follows with reference to FIG. 7(f): elements already defined are used to define other elements is only one example, there being many other methods of definition available.
When figure definition is performed in the prior art, the arrangement is such that a figure is defined by a first definition statement or, alternatively, an already defined figure is used to define another figure by a second definition statement. A figure defined by a second definition statement is re-expressed internally by the first definition statement, which uses coordinate data. Therefore, the second definition statement is erased. Consequently, in a case where it is desired to modify the part profile, as shown in FIG. 8, by changing the radius of the circular arc C.sub.1 of the profile A (see FIG. 6(a)), the figure is defined by the following part program: figure element from the beginning and picking the figure elements in order along the profile. As a result, revising the already defined profile is a troublesome task.
Accordingly, an object of the present invention is to provide a profile revising method through which a profile can be revised merely by solely modifying the figure definition statement of a figure element relating to a modification.
SUMMARY OF THE INVENTION
When a profile has been defined, a figure definition statement (part program) in accordance with the definition is
REFERENCES:
patent: 4802038 (1989-01-01), Isobe et al.
patent: 4939635 (1990-07-01), Seki et al.
Arakaki Takeshi
Seki Masaki
Takegahara Takashi
Fanuc Ltd
Gordon Paul
Smith Jerry
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