Study on Drilling Force of Carbide Drill with Different Edge Preparation

摘要

The carbide drills with different edge preparation were used for drilling of 40Cr. The influence of drilling speed and amount of feed on drilling forces has been studied by the single factor experiment. The conclusions indicated: when the feed went bigger, the drilling forces of the polished drills were lesser than unpolished drills for un-coating drills; but for coating drills, the drilling forces of the polished drills were greater than unpolished drills. With the increase of cutting speed, drilling forces of un-coating drills mounted up first but went down afterward; and the drilling forces of coating drills increased monotonously.