Research on Dynamic Reliability Sensitivity of Hard Alloy Cutting Tool

doi:10.3969/j.issn.1000-1093.2014.01.017

Abstract

Abstract: The selection of design parameters of cutting tool has the direct effect on the reliability of tools and the precision of processed workpiece. Based on stress-strength interference model, a mathematical model on dynamic reliability of hard alloy cutting tool is built, and the change rule of its reliability is obtained. Combining with sensitivity analysis method, the computational formulas of dynamic reliability sensitivity of physical and material parameters of hard alloy cutting tool are deduced, and the curves of reliability sensitivity of design parameters are also given. The results show that the design parameters of cutting tool are more sensitive with the increase in machining time and impact loading action, thus the selection of sensitive parameters should be controlled directly or indirectly so as to reduce its influence on reliability of cutting tool, which can improve the reliability of cutting tool and the precision of processed workpiece. Meanwhile, the proposed method provides a theoretical basis for enhancing the reliability of tool system and the whole machine tool.

Key words: cutting tool technology, mechanical strength, cutting tool, dynamic reliability, sensitivity, critical fatigue stress

CLC Number:

WANG Xin-gang， LI He, LYU Chun-mei, WANG Xue-ling₂, PANG Xu₂. Research on Dynamic Reliability Sensitivity of Hard Alloy Cutting Tool[J]. Acta Armamentarii, 2014, 35(1): 114-119.

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