Abstract
Sintered-carbide tools, made of the hardest metal man has ever produced, have played a predominant role in speeding up war production. While appreciable experience has been acquired in connection with the turning of artillery shells and other implements of war, the application of sinterod-carbide tools is often more difficult in milling than in turning operations because face-milling cutters, end mills, straddle mills, side mills, etc. are subjected to several hundred impacts per minute, which may destroy the tools prematurely due to their brittleness. Control of impact is therefore vital, a problem not encountered with high-speed steel tools.
It is the purpose of this paper to present methods for determining readily the impact conditions for any shape of the cutting edge as a function of positive and negative rake angles, corner angle, cutter diameter, position of the cutter relative to the workpiece, feed per tooth, and depth of cut. Furthermore, tests are discussed indicating a variation in the wear of sintered-carbide tools with a variation of impact conditions obtained by altering the relative position of cutter and work.
