PURPOSE: To detect the abrasion of a grinding wheel in an early stage and to prevent in advance the working executed by a defective tool by detecting hydraulic pressure of a static pressure guide part for moving relatively a tool and a work, and deciding the wear amt. of the tool, based thereon.
CONSTITUTION: When a grinding wheel 8 is worn out and becomes blunt, as a working resistance increases and decreases, hydraulic pressure of pockets 13 - 17 being static pressure guide parts to which this resistance is applied is also varied. Also, a deciding means decides the wear amt. of the wheel 8, based on the hydraulic pressure of the pockets 13 - 17 detected by pressure sensors 22, 24 and 25 being pressure detecting means. That is, when the wheel 8 is worn out and becomes blunt, main component force of the working resistance decreases and back component force increases. Also, as the main component force decreases, hydraulic pressure of the pocket 13 to which this force is applied decreases or increases, and as the back component force increases, hydraulic pressure of the pockets 14 - 17 to which this force is applied increases or decreases. Moreover, the deciding means decides the wear amt. of the wheel 8, based on the hydraulic pressure of the pocket 13 detected by the sensor 22, and the hydraulic pressure of the pockets 14 - 17 detected by the sensors 24, 25.
| JP2015169436 | CUTTING TEST APPARATUS |
| JPH0938814 | HOLE CUTTING METHOD AND DEVICE |
YAMAGUCHI MASAO
NOGUCHI NORITAKA
| JPS62188649A | 1987-08-18 | |||
| JPS4873886A | 1973-10-05 |
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