Boots – shoes – and leggings
Patent
1992-06-30
1994-05-24
Smith, Jerry
Boots, shoes, and leggings
36447424, G06F 1546
Patent
active
053155238
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a numerical control apparatus having a work simulation function, and more particularly, to a numerical control apparatus capable of always and adequately checking both a workpiece configuration change and a tool shift movement in the work simulation.
2. Description of the Related Art
There has been known an interactive numerical control apparatus which executes a work simulation by use of a graphic animation in compliance with a numerical control program so that an operator can check whether the program is good or bad. This kind of apparatus carries out the work simulation by selectively changing its display magnification. For example, one of the display scales (first scale) is set to display both the workpiece and the tool located at a shift starting position together on a display screen. Another one of the display scales (second scale) is set to display an enlarged view of, for example, the workpiece.
Also, in the conventional apparatus, the display scale is not changeable during the work simulation. Where the overall shift trace of the tool is to be checked, the first display scale is preferable for executing the work simulation. In this case, however, the configuration change of the workpiece resulting from the cutting operation of the workpiece cannot be checked precisely.
On the other hand, where the workpiece configuration change (or the workpiece cutting process) is to be checked, the second display scale is preferable for executing the work simulation; however, it would be impossible to check the overall shift movement if the tool should shift beyond the scope of display.
SUMMARY OF THE INVENTION
The purpose of the present invention is to provide a numerical control apparatus having a work simulation function capable of displaying both the workpiece and the tool movement with respect to the workpiece at any time during the work simulation on a display screen at an adequate display magnification so that both the workpiece configuration change and the tool shift movement can always be checked adequately.
In order to accomplish above purpose, the present invention provides a numerical control apparatus having a work simulation function capable of displaying both the workpiece configuration change and the tool shift movement on the same display screen in accordance with the execution of a numerical control program. The numerical control apparatus comprises a scaling means for establishing a predetermined scale suitable for displaying the workpiece configuration change, an arithmetic means for calculating a scale by which both the workpiece and the tool at its present shifted position can be displayed together on the display screen on the basis of the present shifted position of the tool in compliance with the execution of the numerical control program, and a magnification determining means for determining the display magnification based on the result of comparison of the predetermined scale and the calculated scale so that the work simulation can be executed by the determined display magnification.
As is described above, in accordance with the present invention, the work simulation is carried out by the use of the display magnification obtained by taking into consideration both the predetermined scale suitable for displaying the workpiece configuration change in detail and the scale calculated based on the present shifted position of the tool as a result of the execution of the numerical control program.
Therefore, during the work simulation, both the workpiece and the tool shifting with respect to the workpiece are always and adequately displayed on the display screen. Thus, it becomes possible not only to check the workpiece configuration change in detail during the work simulation but also to adequately check the overall shifting locus of the tool. Accordingly, the program check can accurately be executed throughout the work simulation.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a schematic block diagram show
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E. Hohweiler et al. "Einsatz der Rundachse fur die Komplettbearbeitung auf CNC-Drehmaschinen", ZWF Zeitschrift fur Wirtschaftliche Fertigung und Automatisierung, vol. 83, No. 2, pp. 68-73, Feb. 1988, Munchen, DE.
Fujita Naoki
Matsumura Teruyuki
Murata Koichi
Fanuc Ltd.
Smith Jerry
Tousi Cameron H.
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