| 摘要 |
<p>In a numerical control grinding machine, a workpiece with a taper portion to be ground is rotatably supported on a swivel table which is mounted on a traverse table to be pivotable about a pivot. For grinding the taper portion, the traverse table is moved to bring a reference end surface of a workpiece into engagement with a measuring device, and a numerical controller detects a deviation of the pivot from a corresponding position in the case of a workpiece model. The numerical controller is in advance given a reference table feed amount, a reference swivel pivot angle and a reference wheel feed amount through which the traverse table, the swivel table and the grinding wheel would be moved respectively after the reference end surface is brought into engagement with the measuring device, to precisely grind a corresponding taper portion of the workpiece model if the same were supported on the swivel table. The numerical controller compensates the reference table feed amount and the reference wheel feed amount for the detected deviation and then, controls movements of said traverse table, the swivel table and the grinding wheel based upon the compensated table feed amount, the reference swivel pivot angle and the compensated wheel feed amount, whereby the taper portion of the workpiece can be ground to a desired dimension at a position spaced from the reference end surface a predetermined distance.</p> |
