The Effect of Experimental Error on the Determination of the Optimum Metal-Cutting Conditions

Abstract

The effect of experimental error in tool life testing on the determination of the minimum cost cutting speed (Vmin ) is investigated by using the concept of statistical inference. It is shown that Vmin is not uniquely defined but lies within a probable interval of cutting speeds, and that this interval is affected by the cost and time parameters and the experimental range of feed in tool life testing. The selection of a specific speed from the Vmin confidence interval is illustrated by a decision rule based on the minimax principle.