通常長手切削法と多段階切削試験法における工具逃げ面摩耗特性の比較

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Although the performance of a cutting tool has been evaluated by the tool-life value (T) or the wearland value (V_B) obtained from the conventional turning test, it is difficult to compare the various results and to apply such data for facing or the others. It appears that the wear rate (dV_B/dL) and imaginary initial wear (V_<BO>) are more available to evaluate the machinability, if their characteristics, i.e., wear characteristics are seized thoroughly. So, in this report the flank wear characteristics, mainly the cuttingspeed dependence of the wear rate and imaginary initial wear, are studied in conventional turning and step turning for carbon steel by using carbide tool. From these experiments the following results are obtained. (1) Flank wear on side and end relief faces : In the conventional turning, within the limited range of cutting speed, the relation between the wear rate C and the cutting speed v is given by C = K v^α, where α and K are empirical constants. The cutting speed can be classified into three ranges in accordance with the degree of α. The imaginary initial wear is slightly infuluenced by the cutting speed. Above tendency agrees with the one of step turning. Especially in the middle range of cutting speed, the values of α, K and V_<BO> in the step turning are nearly equal to those in the conventional turning respectively. (2) Boundary wear on side and relief faces : In the conventional turning, above equation can be applied to the bonndary wear in each range of the cutting speed. In the step turning test, the tool wear rate is infuluenced by the selecting method of cutting speed.
宇部工業高等専門学校の論文
1979-03-15

通常長手切削法と多段階切削試験法における工具逃げ面摩耗特性の比較

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