定寸装置で制御する機械加工工程における寸法の分布

概要

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A proper method to evaluate process capability for quality characteristics having skew distributions has not been established yet, because we have not known what characteristics have skew distributions and which types of distributions those characteristics have. In order to derive the distributions it should be considered how workpieces are machined and how the processes are controlled. The distribution of a dimension of workpieces such as diameter, thickness etc. is skew when they are machined with a sizing device which finishes processing at the specified dimension. In this paper, the distribution is derived theoretically using the renewal theory. It is verified by two examples of practical processes. Conditions for application are also discussed. The derived distribution can be widely applied to the processes controlled by the sizing device.
社団法人日本品質管理学会の論文
1986-01-15