Abstract
Abstract The influence of flushing in metal cutting, including flow rate, composition and type of coolant, coolant pressure and direction, IS the subject of many investigations. In the current study high pressure flow was used, penetrating through the cutting tool's rake face and reducing the temperatures in the most critical area. During the investigation the pressure was increased up to 25 bar. Mainly grooving operations were investigated, in which chip symmetry simplifies fine analysis. It was found that flow rate and pressure have a significant influence on tool life and wear behavior as well as on the chip shape and the metallurgical structure of the chip itself. The narrowing and curling effect of the chip, improving chip exit from the slot, is viewed as related to temperature reduction. The investigation covered different cutting tool materials and different workpiece compositions. It was found that the phenomenon of built-up edge was minimized, especially when machining stainless steel and similar high alloy materials.
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