Abstract: Aiming at the problem of quality risk identification of high-precision products, especially aerospace composite structural parts, the failure mode identification method is proposed by analyzing the production process and combining the molding process and production factors of composite structural parts. The effectiveness of the severity (S) and detectability (D) evaluation criteria is improved by increasing the evaluation dimension, the frequency (O) is accurately defined by the similar process method. Combined with the production process of CZ-5 fairing, the application of PFMEA in the forming of large-scale aerospace composite structural parts is expounded, which provides a reference for small batches of multi-variety products to avoid quality risks.

Key words: Process Failure Mode and Effects Analysis, aerospace composite structural parts, multi-varieties and small batch, quality control