Research On Measurement And Control System Of Car Body In Bodyshop

The quality of the automobile products has a large extent influence on the productmarket competitive strength. Therefore, the quality of the products is depended on itsprocess of designing and manufacturing. Product design gives the basic features of thequality, but the product manufacturing quality determines the overall performance andthe use of the stability of the car. Body-size-control of body shop is the big problem ofthe various auto companies. Combined with the manufacturing process and equipmentcharacteristics in body shop, this paper made a systematic study of the white body sizecontrol system. According to the production process controlling and detectioncontrolling, it gave the main research on data and characteristics of body size,controlling method and size evaluation. Finally it contributed to establish a dataoptimization model.At first, a car-body-size-control system had been successfully established.Starting from the manufacturing process and the manufacturing technology, itanalyzed the bias sources. Use mass spectrometry5M1E to analysis the deviation ofthe size of car body to find the causes. Using all the reasons above, it had established aquality control system of car body and determined the body size quality controlmethod. Then, this paper studied the body size control standard, control method andoptimization method. The control method was controlling the production of five inputelements(namely human, machine, material, method, environment). It gave anultimately achieve to the desired manufacturing quality and product quality. Through,the method of body size quality evaluation, the method of body size detection, theanalysis of body size characteristics and the improvement process were the four areasof the body size of monitoring and controlling which were to be elaborated. Finally,the body size measurement data was optimized. The production process of the bodyline measurement frequency was studied to optimize and improve the measurement ofscientific validity, and also to achieve the increase in production capacity. In order tosolve the problems of CMM measuring defects, such as less-line measurementmeasuring point, high frequency characteristics, establish a link between the twomeasurement methods to improve the measurement of the data model. The research methods are used in quality control system of a car body shop. Bythe data acquisition, data analysis, data optimization and data monitoring, achieve thecontinuous improvement of the control body size. The research has made someachievements.