対流熱伝達を考慮した研削温度の解析

概要

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Grinding temperature has a significant effect on the grinding accuracy and surface integrity. Since the convective heat transfer coefficient α in the vicinity of the wheel to workpiece contact zone under wet grinding have hardly been known, reliable estimation of the grinding temperature have never been done. In this paper, the temperature distribution in a workpiece is calculated by using a finite element method where some models of the distribution of α, based on the results formally measured by authors, are utilized and film boiling phenomenon is also considered. Main results obtained are as follows : (1) In deep grinding, the film boiling occurs in the forward part of the contact zone. The boiling area sharply expands with the quantity of heat applied; (2) In down-grinding, since coolant is supplied directly to the forward part where the maximum heat flux is applied the cooling efficiency is higher than that in up-grinding. (3) Grinding heat partitioning ratio into workpiece under wet grinding is estimated at about 3 percent in deep grinding and about 30 percent in shallow grinding.
公益社団法人精密工学会の論文
1993-04-05