LIN Chun mei1, ZHANG De jun1, WANG Gang2, CHEN Xiao lian2, SONG Ming hao2

 

(1. College of Engineering, Yantai Nanshan University, Yantai 265713, China;

 

2. Nanshan Aluminum Company, Shandong Nanshan Aluminum Co., Ltd., Yantai 265706, China)

 

 

Abstract: Aiming at the problem of low quality rate of industrial aluminum profiles caused by difficult production , more quality parameters and high quality requirements, the characters of industrial aluminum production process were analysed, a method of applying SPC in production process was presented . Control points were divided into quality control points and process control points implement respectively. The stability of production process was evaluated by using of each control point of the control diagram. The degree of the production process to meet the requirements of various quality parameters was judged by process capability index. The data acquisition system based on network, the problem tracking system and standards implementation process based on visual production logging were established. The standard implementation process was made. The control charts and process capabilities before and after implement SPC were evaluated. The results indicate that the application of SPC in industrial aluminum production process basically eliminate abnormal fluctuations of the process, reduce the normal fluctuations range, improve the process capability.

 

Key words: statistical process control (SPC); industrial aluminum profiles; quality control; control diagram