Action of Gaseous Environment in Metal Cutting : Surface Roughness and Tool Forces When Machining with Oxygen Jet

概要

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The effect of oxygen jet directed at the cutting area was investigated regarding surface roughness and tool forces when machining carbon steel, alloy steel, stainless steel, brass, and aluminum, comparing with the case without oxygen jet. Oxygen which is the most active gas of the elements contained in air is considered to have a potential to prevent welding at the tool-chip interface. Experimental results showed that the oxygen jet was found effective to improve the surface finish and to reduce tool forces. It also reduced the fluctuation of tool forces. Such effects were emphasized at low cutting speeds where rough surface was usually produced by built-up edge. It was found that the effective range of cutting speed to reduce tool forces by applying the oxygen jet was almost the same as that for the surface finish by the oxygen jet.
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