| 摘要 |
PURPOSE:To enable inspection and cleaning operations of a bored hole with simple operation fit for reduction of dimensions of the whole outfit, by comparing liquid quantity supplied to a work or pressure value before and after machining. CONSTITUTION:An operator operates beforehand a tolerance selector 56 and either of a bore diameter value moximizers 58a-58n or bored diameter value minimizer 59a-n-59a-n as a work classification selecting signal, And, upon starting the hole boring operation, specified compressed air is supplied to a regulator 42 and it is controlled to low pressure at the end of the boring operation. Next, difference of pressure before and after the boring operations is converted to an electrical signal with pneumatic, electric convertor 44 and to a digital signal with an A/D convertor 46 for latching to a latch resistor 48b. Next, the difference pressure signal is led out to comparators 54a, 54b through a comparing operator 52 for comparison with the maximum value selected by he tolerance selector 56. And, if the output assumes a high value of the operator 52, an alarm signal is issued. On the other hand, when comparison reveals that the output of the operator 52 transmitted to a comparing apparatus 54b is lower than the outputs of setting apparatuses 59a-n-59a-n, digital display is made on a displaying apparatus 60. |
