JP2013031889A5 - - Google Patents

Description

Therefore, the dress amount difference measuring unit 35 determines from the detection result of the AE sensor 37 in each step of this series of dressing steps, the rotary diamond 21 of the grinding wheel dresser 20, the inner diameter grinding unit 10b and the end surface grinding unit of the grinding wheel 10. The presence / absence of contact with each of 10a and 10c is detected, and based on the number of non-contact states detected by the rotary diamond 21 and any one of the grinding parts 10a, 10b and 10c (the AE sensor 37 is swung. counts the number (amount) n in), is detected by calculating the difference between the dress of an inner diameter grinding portion 10b and the end surface grinding portion 10 a, 1 0 c (d × n).

Subsequently, grinding infeed amount correcting unit 36, the grinding wheel from the dress amount difference calculation result of the measurement section 35 (the difference between the dress of an inner diameter grinding portion 10b and the end surface grinding portion 10 a, 1 0 c (d × n)) The expansion / contraction amount Z of the grinding wheel shaft 11 of the vehicle 10 is calculated, and this expansion / contraction amount Z is sent as a control signal to the grinding wheel cutting control unit 18, and the grinding wheel cutting control unit 18 responds to the expansion / contraction amount Z of the grinding wheel shaft 11. The grinding wheel cutting drive unit 19 (the X-axis direction cutting drive unit 15 and the Y-axis direction cutting drive unit 17) is driven and controlled, thereby correcting the cutting amount of the grinding wheel 10.

In this case, the dressing process of the inner diameter grinding part 10b and the end face grinding parts 10a, 10c of the grinding wheel 10 by the grinding wheel dressing device 3 is performed by the grinding wheel dresser 20 with respect to the grinding wheel 10 regardless of whether the grinding wheel shaft 11 is expanded or contracted. The dressing is performed while relatively traversing along the reference grinding wheel contour, and the difference in dress amount K between the inner diameter grinding part 10b and the end grinding parts 10a, 10c of the grinding wheel 10 detected during the dressing process K based on, by correcting the depth of cut with respect to the workpiece W of the grinding wheel 10 is configured so as to grind the inner diameter surface Wb and the end face Wa of the workpiece W, the W c to a predetermined finish size.