Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1989-02-09
1990-02-27
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
3185681, 318569, 318577, 340709, 340710, 36447425, H04N 718
Patent
active
049049143
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
This invention relates to a method of creating NC data, and more particularly, to an NC data creation method in which the path of a tool for machining the interior of an area can be inputted while being perceived visually.
2. Background Art
In the prior art, if a machining method (one-way cutting, two-way cutting, spiral cutting, etc.), cutting direction, cut-in direction, finishing allowance, remaining thickness, spindle speed, cutting velocity, tool diameter and the like are inputted in accordance with the same conversational display, a tool path may be decided and created based on an already defined contour irrespective of whether NC data for subjecting the interior of the contour to surface machining or pocket machining is for the purpose of rough machining or finishing machining.
This conventional method is advantageous in that NC data for highly precise cutting is obtained. When a contour is a complicated one, however, considerable time is required to create the NC data and the tool path includes needless path segments (paths which do not contribute to cutting). Cutting efficiency suffers as a result.
In the case of rough machining, the NC data for cutting need not have as high a precision as that for finishing machining. Accordingly, there is a demand for a method through which data required for the creation of NC data for rough machining may be simply defined in a manner different from that of the conventional method so as to raise machining efficiency.
An object of the invention is to provide an NC data creation method through which NC data for rough machining of an area can be simply created for excellent cutting efficiency.
Another object of the invention is to provide an NC data creation method through which it is possible to recognize at a glance whether portions remain to be cut or will be cut too much.
DISCLOSURE OF THE INVENTION
An NC data creation method for machining the interior of an area includes displaying, on a graphic display unit, contours inputted in order to specify the area, recognizing the area, which is designated by a graphic cursor by manipulation of a tablet and painting the interior of the area in a predetermined color, subsequently removing the paint in a linear area, which has a width equivalent to a width of a tool, connecting a machining starting point and a machining end point designated by the graphic cursor, adopting the machining end point as the next machining starting point, thereafter inputting machining end points in succession, and creating NC data for machining the interior of the area by traversing a finally designated machining starting point and machining end point while moving the tool linearly.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram of an automatic programming system to which the method of the invention can be applied;
FIG. 2 is a flowchart of processing according to the invention;
FIG. 3 is a view showing the shape of a workpiece and the shape of a part; and
FIG. 4 is a view for describing processing according to the invention.
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a block diagram of an automatic programming system to which the method of the invention can be applied.
Numeral 101 denotes a ROM storing a loading program and the like, 102 a processor which performs automatic programming processing, and 103 a RAM. The RAM 103 stores a system program STPR for NC data creation read in from a floppy FL, the results of processing, etc.
Numeral 104 denotes an NC data memory for storing created NC data, 105 a keyboard, 106 a graphic display unit (CRT), 107 a disk controller, and 108 a tablet device having a tablet surface 108a to which a menu table 108b is affixed. The tablet is so adapted that a prescribed menu item can be selected by a tablet cursor 108c. Further, the arrangement is such that a graphic cursor GCS on the display screen is moved by moving the tablet cursor 108c on the tablet surface. The menu table 108b is provided with various menu items, among which the items "OPTIONAL C
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Arakaki Takeshi
Seki Masaki
Takegahara Takashi
Fanuc Ltd
Ip Paul
Shoop Jr. William M.
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