Analysis method of parts defects in automobile assembly proc

In the manufacturing industry, especially for the highly integrated and precise automobile industry, it is very important to ensure the quality control of every link. As one of the important parts of quality control, it is particularly important to effectively analyze and manage the defects of parts in automobile assembly process. In this paper, several commonly used methods for defect analysis of parts are discussed, and corresponding improvement suggestions are put forward.

I. Fault Tree Analysis (FTA)

Fault tree analysis is a top-down logical reasoning method, which is used to determine all possible causes of system or component failure. In the field of automobile manufacturing, the fault tree model can clearly show the relationship network between the fault of a specific component and potential factors, and help engineers quickly locate the root cause of the problem. For example, when facing the problem of engine oil leakage, we can explore whether it is caused by the aging of sealing ring or the looseness of oil pipe joint through fault tree.

Second, the statistical process control (SPC)

Statistical process control is a technical means to continuously monitor the production process based on statistical data. By tracking and recording the changing trends of key process parameters such as dimensional accuracy and surface roughness, we can find abnormal fluctuations in time and take measures to correct them, so as to prevent and reduce the occurrence of defective products. SPC is especially suitable for those repetitive and regular processing tasks, which can ensure product quality and improve efficiency at the same time.

Three, six sigma management

Six Sigma management is a data-based and nearly perfect quality management strategy. It emphasizes that starting from the customer's demand, through the five steps of defining clear target value, measuring current level, analyzing the reasons for differences, improving the existing scheme and controlling the implementation effect, the business process is continuously optimized, and the defect rate is reduced to below 3.4 parts per million. Applying this method in automobile assembly line can effectively identify and eliminate the key obstacles affecting product quality.

Fourth, root cause analysis (RCA)

It is particularly necessary to adopt root cause analysis when encountering complex defects that are difficult to solve immediately. This technology requires team members to participate together, and use the principle of "five questions" to dig deep into the real causes hidden behind the appearance until the lowest reason is found. This will not only help to completely solve the problem, but also avoid similar situations from happening again to some extent.

To sum up, in view of various parts defects that may occur in the automobile assembly process, enterprises should flexibly use the above-mentioned various analysis tools and technologies in combination with the actual situation, establish a sound quality management system, and continuously enhance their competitiveness. At the same time, it is also very important to cultivate a high-quality professional team. They need to have a solid technical foundation, keen observation and innovative thinking ability to lay a solid foundation for the long-term development of enterprises.