| 摘要 |
<p>A device for controlling the feeding of a grinding wheel (2, 16) relative to a truing device (8, 19) for the grinding wheel at truing operations in a grinding machine incorporating a measuring apparatus (9, 9a) for indicating the finished size of the ground surface of the workpiece (5, 12), means for controlling the feeding using the indications obtained, means for setting the operation cycle of the machine thus that truing of the grinding wheel is effected after a predetermined number of grinding operations by means of a truing device, which is mounted in a fixed position on the workhead and arranged in such a manner as to follow the movements of the workpiece during the grinding procedure, first members (24, 31) for establishing the position of the grinding wheel spindle relative to the workpiece and the truing device and second members for controlling the relative movement between the workpiece truing device and the grinding wheel during the truing a pre-determined distance characterized by that it incorporates a memory (33) containing a value representing the position of the truing device relative to the grinding wheel at the end of the preceding truing operation, which position establishes the initial position of the truing device at the immediate truing operation, a position register (32) for determining the position of the grinding wheel when finished measure is indicated in the measuring apparatus in the first grinding cycle after the preceding truing operation, and a comparator (30) for comparing the actual position of the grinding wheel in relation to the workpiece when the measuring apparatus indicates correct measure, the contents of the memory being adjusted by any difference possible established by the comparator.</p> |
