Research On Process Quality Control Based On Process Capability Indices

Quality management and control are important means to realize the preventive principle and keep the stable production for enterprise. Only the process quality satisfies the manufacture demands, the quality aims of enactment during the products development and design can be realized and the high quality products satisfied the user desired can be produced. So, in Advanced Manufacturing condition, how to improve efficiently process quality has been the research focus in the current product quality control field.In this paper, based on the correlation theories of the process quality control and the process capability indices induction and summarization, the process quality control and the sampling inspection plan are further studied based on the process capability indices. The mainly study is concerned about the following aspects:â‘ The correlation theories of the process quality control and control system are investigated. Biased on review the theories of quality control, the process quality control and the process capability indiceses and their development course, the methods of process quality analysis are discussed and the frame system of process quality control is founded.â‘¡The process quality control based on the process capability indiceses is studied. Based on the basic process capability indiceses induction, the concepts of dynamic process capability indices, dynamic modify process capability indices and the multistage process capability indices are proposed. The relationship between dynamic process capability indices and manufacturing quality is analyzed. The method of quality control based on multistage process capability indices from quality loss is discussed.â‘¢The products sampling inspection plan based on the process capability indiceses is researched. In view of prevent function of the process quality from the process capability indiceses, the products sampling inspection plan is established. The connections of the process capability indiceses with the sampling samples content and reject rate are studied. The in one batch is calculated. With the example investigate, the result shows that the inspection method can eliminate the reject and realize the sampling samples content and the number of eligibility products confirmation correctly.