| 摘要 |
PURPOSE:To improve the grinding performance by controlling the application timing, etc. of the discharge electrolytic voltage in response to the contact condition between a work and a discharge band of a grinding stone in a grinding method using a discharge electrolytic grinding stone provided with discharge bands and grinding bands in turn on the outer periphery of the disk-like grinding stone. CONSTITUTION:A discharge electrolytic grinding stone A is provided with discharge bands made by burying a conductive material in several slit-like grooves provided on its outer periphery and grinding bands C of the other portions in turn, and a work D is machined by shifting the work D in the arrow direction while this grinding stone A is rotated in the arrow direction. At this time, a moment T0 when a discharge band B starts contacting with the work D is detected by a timing detector H, and the application of the discharge electrolytic voltage is stopped until a time T1 when a duration tau0 set by a variable timer elapses from that time. A switching element G is controlled so that the discharge band B applies the discharge electrolytic voltage only for a duration tau1 from the time T1 to a time T2 when the contact is completed. |
