METHOD OF SELECTIVE ASSEMBLY ABOUT MECHANICAL PRODUCT BASED ON TAGUCHI-QUALITY-THINKING

LIU Mingzhou  ZHANG Fengqin  WU Junfeng  YANG Lanhe  HU Jing

(School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009)

Abstract: Dr. TAGUCHI’s quality loss function is used to handle the selective assembly activity about mechanical product, in order to reduce the loss of mechanical product that can be affected by its function fluctuation after selective assembly. Through analyzing the disadvantages and limitation of the quality loss function proposed by Artiles, multi-quality- characteristic loss function based on signal noise ratio(SNR) is introduced, which expresses quantitatively each multi-quality- characteristic’s loss weight and loss cost of each part or component, and the quality loss function of matching deviation is proposed as weighing an effective index of matching precision. Concerning multi-mating precision of mechanical product and multi-quality characteristic of each part or component synthetically, the model of product-quality loss cost (P-QLC) facing on selective assembly is built by using thinking of integer plan, in case of guaranteeing the minimum of product quality loss cost, the goal of optimal assembly combination is achieved. An example is given to testify the validity of this method.

Key words: Quality loss function Signal noise ratio Precision of matching Selective assembly model of P-QLC

CLC No: TH166 

教育部留学归国基金资助项目(200213B2). Received 20051102, received in revised form  20060428