硬塑仪表板乘客气囊盖展开失效的设计改善

Design Improvement of PAB Cover Unfold Failure of Rigid Plastic I/P

硬塑仪表板的乘客安全气囊在进行低温和高温爆破试验时,出现了气囊盖铰链断裂及破碎飞溅等问题。经过对裂口和碎片的形态进行分析,找出失效原因,制定了在气囊门内壁预埋织布、调整气囊盖的激光弱化线轨迹及尺度参数、加强气囊框的焊接强度等优化方案,并进行多次验证,最终实现气囊高低温爆破试验的气囊盖正常展开。本文对气囊盖的试验验证设计优化过程进行了研究和总结,归纳出能够避免气囊盖爆破发生断裂和飞溅的设计方法和参数,以期为后续新项目类似结构的气囊盖的设计提供参考和指导。

When the PAB of the rigid plastic I/P was subjected to low-temperature and high-temperature blasting tests,the PAB cover hinges were broken,fracture and splashed.After analyzing the morphology of the cracks and fragments to find out the reasons for the failure,the optimization plan was formulated to embed fabrics on the inner wall of the PAB door,adjust the laser weakening line trajectory and scale parameters of the airbag cover,and strengthen the welding strength of the airbag frame.After many verifications,the airbag cover of the airbag high and low temperature blasting test was finally unfold normally.This paper studies and summarizes the design optimization process of the PAB cover test verification,and summarizes the design methods and parameters that can avoid the breakage and splashing of the PAB cover blasting,in order to provide reference and guidance for the design of the PAB cover with similar structure in subsequent new projects.