Boots – shoes – and leggings
Patent
1987-03-23
1989-01-17
Smith, Jerry
Boots, shoes, and leggings
3644742, G05B 1900
Patent
active
047991437
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a method of creating NC data in an automatic programming apparatus and, more particularly, to an NC data creation method so adapted that a tool can be made to avoid striking an obstacle if one is present on a tool travel path generated in accordance with a predetermined rule.
There are cases where a tool, after completing the machining of a first area, is moved to a second area to subsequently perform predetermined machining at the second area. For example, as shown in FIG. 5(A), there are cases where hole machining of a prescribed type is performed at a first area AR1, after which the tool used at the first area AR1 is moved as is (i.e. without being exchanged for another) to a second area AR2, where hole machining of another type is then carried out. In such cases, the tool must be moved from the first area AR1 to the second area AR2. In the prior art, this is accomplished by previously deciding the position of an approach surface APS in the height direction (Z direction), retracting the tool to the approach surface APS after is has completed cutting a final hole H12 at the first area AR1, thenceforth moving the tool on the approach surface to a point directly above an initial hole H21 at the second area AR2, then causing the tool to approach the initial hole and subsequently cutting a hole at the second area. In FIG. 5(A), WK represents the workpiece in which the holes are formed, H11, H12 . . . denote the holes in the first area AR1, and H21, H22 . . . denote the holes in the second area.
There are situations where an obstacle is present on the tool travel path between the first area AR1 and second area AR2. For example, as shown in FIG. 5(B), a portion of the workpiece WK may protrude beyond the approach surface APS between the first area AR1 and second area AR2. If the tool path is decided in accordance with the conventional method in such situations, the tool will strike the protuberance when it attempts to move from the first area AR1 to the second area AR2.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide an NC data creation method so adapted that a tool will not strike an obstacle if one lies on the tool travel path.
Another object of the present invention is to provide an NC data creation method in which, by previously establishing an auxiliary position input mode, processing for creating NC data automatically can be temporarily halted prior to the creation of NC data for the approach from a first area to a second area.
A further object of the present invention is to provide an NC data creation method in which, by previously establishing an auxiliary position input mode, processing for creating NC data automatically can be temporarily halted prior to the creation of NC data for the approach from a first area to a second area, after which NC data are created upon setting, in a conversational input mode, a tool travel path that will not result in a collision with an obstacle. To achieve the above and other objects, the present invention provides an NC data creation method in an automatic programming apparatus in which NC data are created for moving a tool, after the tool has completed the machining of a first area, to a second area to perform predetermined machining at the second area. The NC data creation method includes:
a step of checking whether an auxiliary position input mode has been set in creating NC data for moving a tool from a first area to a second area;
a step, executed if the auxiliary position input mode has not been set, of creating NC data for moving the tool from the first area to the second area along an approach surface a predetermined height above a workpiece; and
a step, executed if the auxiliary position input mode has been set, of temporarily halting processing for automatic creation of NC data, thereafter inputting an auxiliary position conversationally, and creating NC data for moving the tool to the second area via the inputted auxiliary position.
BRIEF DESCRIPTION OF THE D
REFERENCES:
patent: 4513366 (1985-04-01), Otsuki
patent: 4646247 (1987-02-01), Munekata et al.
Onishi Yasushi
Takegahara Takashi
Tanaka Kunio
Fanuc Ltd.
MacDonald Allen
Smith Jerry
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