DEVICE AND METHOD FOR COOL AIR COOLING TYPE MACHINING

摘要

A machining device using a cool air cooling which can reduce effects by heat on a work and a machining tool and improve a machining precision. Specifically, a method of grinding a work (W) with a cooling air supplied to the work (W), a grindstone (42), a portion to be ground (P) of the work and a portion other than the portion (P) of the work, wherein the surface temperature of the work (W) is detected by a temperature detector (90): when the surface temperature reaches an upper threshold value, a second cooling air supply device (52) is controlled to gradually increase the flow rate of air supplied from a work cooling pipe (80); when the surface temperature reaches a lower threshold value, an air flow rate is gradually decreased; thereby making it possible to maintain the surface temperature of the work (W) at temperatures between the upper and lower threshold temperatures, restrict temperature rises of the work (W) surface and the machining tool and improve the machining precision of the work.