過渡的切削過程における表面特性の研究 (第1報)

加工硬化層の解析

抄録

In machining with cutting edges in periphery of a multi-cutting edge tool, the machined surface is generated by repeat of the transitional cutting process. In other words, the machined surface is generated in the transitional cutting process by the beginning part of contact between a cutting edge and workpiece. Surface integrity in the transitional cutting process should, therefore, be analyzed, recognizing the phenomena near the beginning point of the contact.
In this paper, from this point of view the work hardened layer has been analyzed in the transitional cutting process theoretically and experimentally.
First, the work hardening coefficient, a fundamental value on analyzing the depth of work hardened layer, is experimentally measured, and the influences of machining conditions on the coefficient are investigated. Then, the generation curve of the work hardened layer is determined by the work hardening coefficient, and the maximum depth of work hardened layer is theoretically analyzed.
Further, the influences of machining conditions on the maximum depth of work hardened layer are investigated experimentally, and it is indicated that the experimental results coincide with the theoretical one.