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Based on GD&T standards, for A-pillar lower end reinforcement part of an automotive, the process scheme of thermoforming die under different edge tolerance requirements was designed, and the influence of product design on the die process was expounded by the feasibility analysis of the process scheme and the cost comparison of the whole process parts corresponding to different processes. The results show that on the premise of matching the body sizes, the pre-development process can effectively reduce the tooling development cost, reduce the laser cutting cycle, and improve the production efficiency. The metallographic structure and the mechanical properties of thermoformed part meet the design standards and meet the requirements of safety regulations. At the same time, the production process scheme of product was analyzed by simultaneous engineering (SE), and under the condition that the manufacturability and performance of the parts were satisfied, the selection of GD&T on the product design was reversely promoted, and the importance of SE in the vehicle development was emphasized.
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