钢铝一体化车身框架结构关键技术及最新进展

综述应用钢铝一体化车身框架结构实现车身轻量化的最新进展及关键技术难点。在传统的车身骨架钢制结构中,有些构件或组件用铝合金代替,且通过优化设计和性能模拟方法确定钢铝的比例和以铝代钢的部位,可实现车身轻量化和高强度。但铝和钢可焊接性差、存在电化学腐蚀等问题,成为结构设计的难点。同时必须保证车辆发生碰撞时,车身结构的指定部位能够吸能碰撞能量。因此关键技术涉及钢铝连接技术、电化学腐蚀、碰撞安全、新的成型工艺技术、拓扑结构优化。

Key technology for skeleton structure of automobile body with steel and aluminum intergration and latest development

The latest development and difficulties of key technology in applying steel aluminum combined structure as automobile body to realize the lightweight of the body are summarized in it.In traditional steel skeleton structure of automobile body,some components or assembly could be replaced with aluminum alloy,which ratio of steel and aluminum and the location of aluminum instead of steel could be confirmed through optimization design and performance simulation method to realize the lightweight and high strength of the body.However,with poor weldability and electrochemical corrasion of aluminum and steel,it has been a difficulty in structural design.Meanwhile the specific part of the bodytructure should be guaranteed to be able to absorb the collision energy when collision occurs.Ther fore the key technology involves joining technology of steel and aluminum,electrochemical corrision,collision safety as well as new forming process and optimization of topological structure.