機械加工量産ラインにおけるオンライン品質工学の実践

抄録

In the manufacturing field, demand is rising for the construction of a new quality control mechanism that can assure product quality more reliably and efficiently than conventional mechanisms. To achieve this, we collsidered that it would be effective to use on-line quality engineering (On-QE). On the basis of research results obtained using the existing line as a model process reported in the previous two papers, we reviewed radically the conventional inspection system by means of process capability indexes and OK/NG binary judgment, and comprehensively introduced a quality control system using On-QE based on a loss function. We incorporated the idea of On-QE in "setting cycle time/measuring place" at the stage of line design, and developed and introduced a "total management system" to realize fast adjustment and reflection of the optimum measuring cycle required by On-QE. As a result, we achieved a manufacturing line with the loss function L, which was overwhelmingly smaller than the conventional one, at the start of mass-production. We proved that On-QE promotion activities to reduce social loss resulted in reducing faults in our company.