| 摘要 |
PROBLEM TO BE SOLVED: To improve the lubricity and abrasion resistance of a cutter by mixing and dispersing fine powder particles with a surface that, mixing the mixed and dispersed fine powder particles with nitrogen gas, and jetting the mixed nitrogen gas to a tool tip fitted to a machine tool. SOLUTION: A spray nozzle 11 is arranged toward a tool tip 5 fitted to the main spindle 3 of a machine tool 1, and the spray nozzle 11 is fitted to a main spindle head 7 and is connected to a feed source 10 of nitrogen gas N by a pipe 9. An oil mist OM mixed and dispersed with a surface that (soapy water or the like) S and oil O into a powder lubricant F made of Teflon fine particles or ceramic fine particles by a mist generator 10A is fed to the spray nozzle 11. The mixed nitrogen gas No of the oil mist OM and the nitrogen gas N is jetted toward the tool tip 5, and the jetted mixed nitrogen gas No is recovered by a suction recovery unit K.
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