Analysis And Research Of Automotive Body Quality And Defining Design Data

Automotive products' competitive strength in the domestic and international markets depends largely on the quality of the product (this article is mainly the precision manufacturing requirements of body), while product quality has a large extent depends on the product design, the quality of its product design is essential given the nature of properties. Car body is an important part of the car, its manufacturing cost and vehicle weight of about 40% to 50%, car body manufacturing quality cars determines cars performance. Car body manufacturing process is the combination of sheet metal forming,automatic assembly, welding and inspection, quality control and management of complex process of multi-fields,Car body manufacturing quality to some extent reflects the level of a country's industrial technology and manufacturing capability. Automotive body manufacturing variations is widespread problems in the global automotive manufacturer, it will directly affect the car noise, sealing, appearance, ride comfort,cost of car manufacturing and new product launch cycle, may even affect reputation. Automotive body quality control is a necessary condition to maintain its market competitiveness.Tolerance design plays an importance role in the production process to ensure product quality. When tolerance design ensuring product quality, plays a decisive role to product cost and product development cycle at the same time.Proceed up-down tolerance design in product development,to restraint automotive body quality.This article think car body tolerance as a factor of automotive body quality,design tolerance in product development stage.This paper explore automotive products general rules of tolerance design through the body of the design process, the process of tolerance design and vehicle manufacturing process.Make a brief of tolerance design concent,research method and meaning,define and explain the size of the chain according to the model. Tolerances in accordance with the actual cost of collecting data for the design based on cost and distribution theory research and tolerance analysis when lack of the actual data, judges tolerances assign for distribution to the assembly. Finally, comprehensive of tolerance assign and tolerance analysis, optimize distribution of tolerance, then restraint automotive body quality.To some extent parallel design, consider the source of the body design and manufacture quality, think tolerance factor as a driver of product design to ensure the body's manufacturing quality. Purpose is to deepen MC6320A product development system as part of the development of the technology to promote the product a powerful tool which with a strong scientific significance and economic value, have some influence and promote effect in manufacturing information technology and innovation theory and technology.