| 摘要 |
PURPOSE:To obtain the cutting surface having a small working-degeneration layer by arranging a refrigerator for feeding coolant into a cooling pipe buried into a testpiece board and lowering the temperature in the vicinity of cutting point. CONSTITUTION:When a grinding cutting apparatus is turned ON, a regrigerator 8 is driven, and coolant circulates between the refrigerator 8 and the spiral cooling pipe 16 of a testpiece board 5, passing through a flexible pipe 13, and cools the testpiece board 5. When the temperature of the testpiece board 5 becomes a predetermined temperature, the motor for a grindstone shaft 4 is revolved by the instruction supplied from a controller 18, and cutting oil which serves as coolant flows-out from a coolant nozzle 15, and indexing of the cutting position is performed by the pulse motor 10 for a Y-table 9, and a cutting grindstone 1 is provided with the set cutting-in amount by the pulse motor 12 of a Z-axis part 11, and an X-table 6 is moved in reciprocation at a set transfer speed by a hydraulic cylinder, and a workpiece 14 is cut by the cutting grindstone 1. Therefore, the cut surface having a small working-degeneration layer can be obtained by lowering the temperature in the vicinity of the cutting point. |
