| 摘要 |
PURPOSE:To extract wave forms accompanying abrupt rise of characteristic wave form and fall due to working heat included in the variation of level value when a tool is damaged, catch and calculate the time width and raised value of this wave form for automatically judging the damage of the tool. CONSTITUTION:A machine tool controlling circuit 3 is connected to the rear stage of a detecting section 1 through a tool damage detecting section 2 which is connected to the input sides of a CR circuit 4, a raised value comparator 5 and a maximum level value comparator 6. The detecting section 1 shapes the detected signal to convert it to voltage and send it to the detecting section 2. Also, the circuit 4 of the detecting section 2 figures out the differential value in the rise and fall of the output signal wave form of the detecting section 1. Further, the comparators 5, 6 compare respectively voltage generated from a reference voltage source with voltage from the detecting section 1. By this constitution can be automatically judged the damage of tool. |
