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Research of Torque Quality Control and Utility in Autombile Production Line

Author: HouHaiJing
Tutor: ZhaoGuangYao
School: Northeastern University
Course: Vehicle Engineering
Keywords: vehicle torque quality control FMEA error-proofing QCOS
CLC: U468.2
Type: Master's thesis
Year: 2010
Downloads: 25
Quote: 0
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Abstract

The modern car is a complicated structure assembled by more than 40,000 parts. Considering the convenience of rework and process assembly, most of the joints are fastened by screw thread or thread link. Therefore, thread link torque control is very important to the vehicle quality. The vehicle manufacturing enterprises are researching a effective way to control the torque all along, including state torque controlling and dynamic torque controlling. The important fastening joints are made under the industry standards and relative laws limitation, basing on the earlier vehicle manufacturing data and experience. The production line chooses tooling according to the torque released by engineering dept. and confirms the torque controlling methods according to experiences. However, as the usage of large amount powerful tools, using state torque checking tools to examine and control can’t satisfy the rapid steps of production.SGM products are from GM global vehicle development system including many GM stock holding research institutes in North America, Europe and Pacific Asia. The torque releasing generally contains many different torque control systems. How to combine the state torque requirement and dynamic torque process configuration becomes an important task to the company’s manufacturing departments. This paper develops and researches the car products torque quality control and management system for the requirement of SGM Norsom (Shenyang) Ltd. new plant production line. It tries to combine the FMEA and QCOS torque quality control tools, introduce quality system to process planning and integrate North America and GMDAT torque system to realize a high quality thread joint torque control.Based on the analyses and researches on FMEA fundamental, the usage in vehicle manufacturing enterprise, relationship between vehicle enterprise’s FMEA and error-proofing technique, thread joint theory and fastening theory, this paper build a new plant GA torque quality control and management system considering the characteristics of new plant production and assembly, the old plant torque control and management advantages. It also deeply researches on controlling methods. The research includes people, process, tool, error-proofing, QCOS system torque quality control plan and implement. The torque quality control and management system combines FMEA and QCOS to make the key torques more reliable. It also has the functions such as car mode identification, tool, process and material error-proofing, automatic pause, quality examination, and staff management which can provide guarantees to key torque controlling. After production operation, the system was proved to play an effective role on torque quality control and can improve the vehicle quality in GA line.

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