| 摘要 |
<p>PURPOSE:To generate necessary tool path data at a high speed by being provided with an accuracy determining device to determine the number of the picture element division in a prescribed size accuracy for the difference between a free curved surface and an off-setting polyhedron and a surface roughness determining device to determine a tool feeding width based on a surface coarseness instruction. CONSTITUTION:An accuracy determining preprocessor 21, based on a tolerance designated to an object work, divides the geometrical curved surface generated at a CAD step into many quadrangles and triangles and determines a division accuracy. By the polyhedron division, the model made approximate within the tolerance is generated. Next, a surface roughness determining preprocessor 22 determines the feeding width of a tool based on the designated surface coarseness. The data of the dividing accuracy of an off-setting polyhedron obtained by these preprocessors 21 and 22 and the tool feeding pitch are conveyed to a tool path generating processor composed of a processor 23 for rough cutting and a processor 24 for finishing cut, the curved surface data of the geometrical model are successively processed on these and tool path data are formed.</p> |
