Research and Application of Distributed Measurement and Control System on Plant Processing Quality
|Course||Mechanical Design and Theory|
|Keywords||Quality management SPC technology Multivariate Quality Control CAN bus Serial ports|
The pros and cons of the product quality is an important symbol to measure a country's productivity level of development as well as technical, economic development level. With social progress and scientific and technological development, the manufacturing quality of the ever-increasing demands. Weifu Group Co., Ltd. cooperation projects \Thesis work and the results obtained are as follows: (1) based on analysis of the Weifu company's existing manufacturing and processing information systems and quality control requirements, research the quality of the shop floor monitoring and control network model, proposed a way to improve the level of quality management easy implementation and operation of the distributed quality monitoring and control system architecture, discuss the composition and function of the the SPC network application system. Research and development of a set of product quality characteristics digitization and analysis of SPC instrument unit and digital acquisition processing in one part of the other key technologies, as online measurement distance of different lengths, this paper based on the serial communication technology and CAN bus technology, study the short-range multi-serial data acquisition and long-distance-based single-chip hardware platform in the SPC unit system; traditional statistical quality control SPC theoretical capacity of the single-process research and application of more mature data acquisition seamless integration with the process control in a system, using commonly SPC analysis chart for monitoring the process of production capacity and process capability Classifying; 4 polyhydric system has been carried out for a relatively long time, but also produce a variety of methods, such as principal component analysis, stepwise regression, multiple regression, additional information test, multivariate process control charts and so on. Multiple Quality Characteristics process capability analysis and control of process time is not long, compared to less than one yuan process capability analysis system, has not yet formed a systematic analysis and evaluation methods, multivariate statistical methods T2 and the main component analysis are introduced and analyzed using multivariate quality control and evaluation system for an actual production system, with some guidance role. 5 mass production of the oil pump and nozzle plunger precision coupling, practical application and validation of the theoretical results.