突切り切削の研究 (第2報)

切残し生成機構の実験的解析

抄録

In this report, the theoretical analysis of the formation of the uncut core in the cutoff operations of a bar work reported in the lst report is experimentally exmained under the various cutting conditions. It is clearly defined by the experiment that there are two different mechanisms in formation of the uncut core depending on which force, the resultant cutting force or the weight of thecutoff work, is prevailed in a given cutting condition. The edge angle of the tool has a great influence on the uncut core. If a usual cutting tool without the edge angle is used, a considerable uncut core is always left on the work. The tool with a appropriate edge angle which is somewhat larger than the optimum edge angle predicted by the theoretical analysis can minimize the uncut core. From the point of view of uncut core, it is recommended to use a smaller depth of cut and a higher revolution of the work in the practical cutoff operations.