Optimization of Injection Process Parameters Based on Grey Theory

Abstract

Abstract. In this paper injection process for industry production is just a grey system which have problems of complex representation and discrete data. Orthogonal experiments have been designed to obtain the value of shrinkage and warp. The lower value of the two objects is better. After data obtained in experiments are dealt with by grey theory, relational degree had been calculated. With variance analysis the optimal level of the factors influencing the value of the two objects have been find out, then a optimal group of the process parameters has been obtained. Through simulation in computer, the warp is less than 0.5 mm, the shrinkage is less than 0.5%. The requirements of the product have been satisfied. In this method the factors had been considered before mould is tested comprehensively. Time and cost of product development have been decreased greatly. It is believed that the method is valuable in actual product.

Optimization and Prediction of Aluminum Alloy Stamping Forming Parameters Based on Gray Correlation

“…However, due to the problems of high production cost, poor welding performance and large rebound, it is particularly important to study the comprehensive performance of aluminum alloy stamping forming process. The optimization of the micro-processing process parameters of SNR and gray correlation studied by Jia Zhenyuan et al [1]of Dalian Institute of Technology, Multi-objective optimization of turning parameters based on Tiankou algorithm and gray correlation theory studied by Xu Xianbo et al [2] from Shanghai Jiao Tong University, Planar grinding process based on gray correlation analysis studied by Li Haolin et al [3] of University of Shanghai for Science and Technology, The milling parameter optimization method based on the gray theory studied by Xin Min et al [4]of Beijing Institute of Technology has achieved very good results with the combination of the orthogonal test design method and the gray correlation method. The method of orthogonal experiment was used for the optimization of the stamping forming process parameters of aluminum substitute steel studied by Liu Jianpeng et al [5]of Xiangtan University revealed influence of process parameters on the mechanical properties of aluminum alloy stamping workpiece , and the optimized process parameter combination is obtained.…”