抄録
In this report, the effects of machining or coaled metals on the cutting force and surface roughness etc were invesitgated. The exteriments were performed by the orthogonal and conventional cutting of the mild steel, brass, duralumin cooled by alcohol and liquid nitrogen.(max temperature -60°C) The results were as follows : 1) The cutting force and surface roughness of the mild steel is decreased at about -20°C, but other metals had no changed phenomenon at the room temperature machining.2) At mild steel cutting, the cutting force and surface roughness (about 1μ roughness) at the lower temperature than about -20°C were samed at -20°C.3) It is found that this phenomenon has same ten dency to the impact valve at the low temperature of the mild steel.4) This cold machining method was effective machining to the body centred eubic lattice material, but had no advantage to the face centred cubic lattice material.
