The B-pillar body can significantly improve the convenience of getting on and offthe car,but the lack of the B-pillar of the body makes it difficult to ensure the rigidity of the body.And the side impact safety is also challenged to a certain extent,thus limiting the development of B-pillar passenger cars.The thermal expansion technology can form a variable cross-section closed pipe beam to achieve integrated molding in the mold and good stiffness of the part.The tensile strength of the inflatable tube beam can reach 1500MPa,and the rebound is small and the forming accuracy is high after high temperature molding.The cross-section expansion rate can reach up to 20%,and there is a high degree of design freedom.The above characteristics make the hot inflatable tube beam suitable for use in B-pillar-less bodies,especially large-size B-pillar-less bodies.Through the application of thermal inflatable tube beams,ZEEKR has successfully created a B-pillar-free body with a side door opening of 2010mm.
维普
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