研削における砥粒破砕のマルコフ過程的解析(第5報)

ベルト研削への適用

抄録

Variation of shape distribution of grain edge due to edge fracture was examined from the beginning to the steady state of belt grinding as a practical example of Markov process in grinding. The grain dislodgement, which often appear in heavy belt grinding, was also investigated experimentally and it was found that the flat type edge is in the majority of the dislodged grain edges. The sequence of the edge fracture, the grain dislodgement and the edge shape transition in the incipient stage of A#24 abrasive belt grinding were then simulated with Monte Carlo method as in the previous report. The calculated results of the transition of edge shape distribution, belt wear and the percentage of effective grain were verified to be in good agreement with experimental results. It was thus confirmed that grinding processes, in which the edge fracture plays a major role, can be predicted by applying the theory of Markov process. It was further made clear that “A” type grain is preferable for the belt grinding, because even in the flat type edge it has a great probability to fracture into other types, hence sharp edges are always kept up in the grinding action.