Profile revising method

Details Profile revising method Profile revising method

1989-06-13

1992-03-10

Smith, Jerry

Boots, shoes, and leggings

36447424, 364192, G06F 706

Patent

active

050954393

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field 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 comprising specified figure elements such as points, straight lines and circles which are connected in order.
2. Description of the Related Art
In an automatic programming system for creating NC data using an automatic programming language such as APT (automatic programming tools) 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 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. 10(a), figure definition is performed by defining straight lines S.sub.1, S.sub.2, S.sub.3 and a circle C.sub.1 [see FIG. 10(b)] which are necessary for defining a part profile, as follows using a keyboard or tablet:
In the foregoing,
(1) signifies a circle of center (x.sub.o,y.sub.o) and radius r.sub.o ;
(2) signifies a straight line parallel to the Y axis and having an X-intercept whose value is x.sub.1 ;
(3) signifies a straight line parallel to the X axis and having a Y-intercept whose value is y.sub.1 ;
(4) signifies a straight line parallel to the X axis and having a Y-intercept whose value is y.sub.2 ; and
(5) signifies the point of intersection between the straight lines S.sub.1, S.sub.2.
Thereafter, the figure elements (which are displayed on a CRT screen) are picked in clockwise or counterclockwise direction in order, e.g., P.sub.2 P.sub.3 is picked, with the clockwise direction serving as a reference), and the profile A [FIG. 10(a)] is defined in the manner ##STR1## It should be noted that Eq. (6) signifies a shape up to the point P.sub.3 clockwise along the circle C.sub.1.
Thereafter, machining starting and end points, etc., of the profile A are designated by motion statement definition to define a tool path along which a tool is moved.
There are cases where figure elements Ck', Sn', St' are added to a profile [e.g, profile A in FIG. 10(a)], whose figure has already been defined, to modify the profile into a new profile A' shown in FIG. 11. In such cases, the prior art is such that each figure element must be redefined from the start and figure elements must be picked in order along the profile A' to specify the profile. As a result, a problem which arises is that the revising operation requires a great amount of time.


SUMMARY OF THE INVENTION

Accordingly, an object of the present invention is to provide a profile revising method through which a profile can be revised simply and quickly, as a result of which NC data obtained based on the defined profile can also be created simply and quickly.
Another object of the present invention is to provide a profile revising method through which new figure elements can be added to an already defined profile in a simple manner.
In accordance with the invention, the foregoing objects are attained by the steps of displaying, on a display screen, profile and one or more figure elements for specifying a shape added to the profile, a designating a predetermined figure element of the profile and designating the figure elements, which constitute the added shape, in order along a definition direction of the profile, and generating a new profile by connecting the added shape to the designated figure element of the profile, and displaying the new profile on the display screen.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of an apparatus for practicing the present invention;
FIG. 2 is a top view illustrati

REFERENCES:
patent: 455683 (1985-12-01), Kishi et al.
patent: 4546434 (1985-10-01), Gioello
patent: 4556957 (1985-12-01), Ichikawa
patent: 4618924 (1986-10-01), Hinds
patent: 4697249 (1987-09-01), Kishi et al.
patent: 4882692 (1989-11-01), Saxton et al.

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