| 摘要 |
PURPOSE:To improve the machining accuracy without stopping the unmanned operation by storing the residual service life of every tool in respective group and selecting the tool having the residual life upon extinction of the service life of one tool then providing a replacement request signal upon extinction of the service life of all tools. CONSTITUTION:A processor 12 will decide whether the service life of the tool under usage has extincted and if it has extincted, the service life flug Fm of the tool now selected or the tool of m-th order is brought to 1 then 1 is brought to (i) thus to select the tool having the residual service life to be selected next. If the service life of m-th tool has not extincted when that of the final order tool has not extincted, the following processing is repeated. If the service life of all tols in (i) group has extincted, a tool replacement request signal for commanding the replacement of (i) group tool is provided to repeat the following process. Upon completion of update of the service life management data of all tools to be used, old management data is rewritten to wait starting of next NC control. |
