Pages 321-322
In this paper, the performance of various emulsions in water-soluble cutting fluids for hobbing was investigated with TiN and (Al, Ti)N coated tools, in term of tool life (flank wear). Experiments were carried out using a fly tool. With the TiN coated tool, though an emulsion containing sulfuric EP additive or synthetic lubricating additive is effective for improving the tool life between the cutting speeds of 86m/min and 117m/min, the tool lives become short and there is no difference in them at high cutting speed of 159m/min. With the (Al, Ti)N coated tool, the emulsion containing synthetic lubricating additive is available for the tool life at the cutting speed of 86m/min, and an emulsion containing synthetic lubricating additive and mineral oil is effective at 117m/min and 159m/min.
