Hand Deburring of Precision Miniature Parts.

摘要

Small precision mechanisms,such as timers,switches,and actuators,must have burr-free,sharp-edged parts to operate well. By controlling the size of burrs produced in milling operations,burr removal costs can be lowered,and the repeatability of the edges can be improved. This study indicated that slower feedrates generally resulted in thinner burrs. The eight different burrs,produced by a side-milling cutter in a single cut,all respond differently to changes in cutting conditions. Cutters having a non-zero helix angle produce longer and thicker burrs than those with a zero helix angle. Radial depth of cut did not influence burr size. Full radius keyseat style cutters with Master Cut tooth geometry produced longer and thicker burrs than similar cutters with square tooth corners. Burrs in 17-4PH stainless steel were much smaller than those in 303Se stainless steel. A basic explanation of the formation of milling burrs is presented.