平面研削盤を用いた接線送り式センタレス研削法の開発(<小特集>生産加工・工作機械の規範2008)

概要

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The present authors previously proposed a new centerless grinding method using surface grinder. In this method, a compact centerless grinding unit composed mainly of an ultrasonic elliptic-vibration shoe is installed onto the worktable of a multipurpose surface grinder to perform tangential-feed centerless grinding. Its validation was also confirmed experimentally. In order to further enhance the performance of the new method, it is crucial to understand the workpiece rounding process, and the effects of the process parameters such as the worktable feed rate, the grinding allowance, and the workpiece rotational speed on the machining accuracy, i.e., workpiece roundness should be clarified. In this paper, at first a grinding model is considered and the basic equations for the simulation analysis of workpiece rounding process are created. Then, simulation analysis is carried out to predict the variation of workpiece roundness during grinding and to discover how the process parameters affect the roundness. Finally, actual grinding operations are performed by installing the previously constructed unit onto a CNC surface grinder for the confirmation of the simulation results. Both the results indicated that (1) Smaller worktable feed rate and higher workpiece rotational speed give the better roundness; (2) The better roundness can be obtained when the grinding allowance is set up at a larger value.
一般社団法人日本機械学会の論文
2009-09-25