【摘要】 通过数值模拟对某车型B柱外板热冲压工艺及工艺参数进行研究,验证热冲压直接成形工艺及其参数的可行性,热冲压实验及对试样的拉伸实验证明了数值模拟的有效性及所提出的B柱外板热冲压直接工艺及参数的正确性;设计了3种方案对B柱在车辆侧面碰撞作用进行分析研究,通过B侵入量跟踪对比,说明热冲压技术在轻量化领域及提高耐冲击碰撞方面的突出优势。分析了热冲压零部件残余应变的特征,阐述了残余应力的产生及作用机理,给出了考虑成形历程的热冲压技术应用方法。更多还原

【Abstract】 The hot stamping process and process parameters are investigated for a model of a B-pillar outer plate by numerical simulation. The feasibility of the hot stamping forming process and its parameters are verified. The effectiveness of numerical simulation and the accuracy of the hot stamping forming process and its parameters for B-pillar outer pate are proved by the hot stamping experiment and tensile tests. Three models are designed to analyze the effect of B-pillar in the vehicle side impact. It shows that hot stamping technology is superior in the field of lightweight and improving impact resistance. The residual strain characteristics of the hot stamping parts are analyzed,the production and mechanism of the residual strain are explained,and the application method of hot stamping technology based on the forming history is given out.更多还原