| 摘要 |
PURPOSE:To efficiently carry out the on-machine truing/dressing for a grindstone by forming an electrode having a desired shape by a tool installed onto a main shaft and carrying out the electric discharge truing/dressing for an object grindstone installed onto the main shaft by using the above-described electrode. CONSTITUTION:An electrode member 6 made of the electric conductive material such as graphite and copper is fixed onto the revolution shaft 2 of an NC-table 1 by a member 20, and a formed electrode 6a having a desired shape is formed by a tool 7 installed onto a spindle shaft 4 through a holder 5, through revolution. Then, in the state where the formed electrode 6a is installed onto the revolution shaft 2, the shank part 50 of the holder 5 having a metal bond grindstone 9 installed is fitted in substitution for the grinding tool 7 onto the tapered part 40 of the main shaft 4, and an electric current for electric discharge is supplied into between the electrode 6a and the grindstone 9, and the main shaft 4 and the revolution shaft 2 are revolved, supplying the working liquid from a nozzle 11, and electric discharge truing is carried out. Thus, the on-machine electric discharge truing/dressing can be carried out efficiently with high precision for the metal bond grindstone. |
