| 摘要 |
<p>PCT No. PCT/JP82/00199 Sec. 371 Date Jan. 25, 1983 Sec. 102(e) Date Jan. 25, 1983 PCT Filed May 27, 1982 PCT Pub. No. WO82/04336 PCT Pub. Date Dec. 9, 1982.The present invention relates to a tool radius compensation method for numerically controlled apparatus in which the coordinates Pi of the position of a tool center are computed which is offset a distance equal to the radius r of the tool in a direction normal to a surface to be cut based on commanded positional information P1, Pc and P2, for enabling the tool to three-dimensionally cut a workpiece. Based on the positional information P1, Pc and P2, a unit offset vector Vi is determined which lies on a plane defined by vectors U and V normal to first and second surfaces to be cut at a three-dimensional corner point Pc. Components along respective axes of the unit offset vector Vi are corrected so that the tool center will move smoothly along a curve contiguous to paths of movement of the tool center before and after the three-dimensional corner point Pc. The coordinates Pi of the position of the tool center are determined from the corrected unit offset vector Vi', a tool radius r, and the information Pc on the position of the three-dimensional corner point.</p> |
