钢板不等温拉深成形的影响因素研究

建立了高温下方盒形件不等温拉深成形的有限元模型.利用正交试验,研究热冲压过程中模具温度对22MnB5钢板的不等温拉深成形能力的影响,并分析零件几何参数对22MnB5钢板的不等温成形能力的影响.结果表明,模具温度越高,22MnB5钢板的成形能力越好;其中凹模温度对成形能力的影响最大,压边圈影响次之,凸模温度影响不大.方盒形件的凸、凹模圆角半径越大,22MnB5钢板在高温下不等温拉深成形能力越好;转角半径越大,转角区域越不易起皱.

Study on Factors of 22MnB5 Steel Anisothemal Drawability

In hot stamping process, tool temperatures and part geometric affect the drawability of material. A finite element model was established for analyzing 22MnB5 steel anisothemal drawing of square box at high temperatures. Based on the orthogonal experiment, the effect of tool temperatures, including die temperature, binder temperature and punch temperature, on the drawability of 22MnB5 steel was analyzed through the FE model. The results indicate that increasing the temperature of punch, die and holder all can improve the drawability of 22MnB5 steel. But the effect of the die temperature is the most significant while effect of punch temperature is not so pronounced. The effect of geometric parameters, including punch radius, die radius and corner radius, was also investigated. It has been found larger dimension of punch and die radius has a positive effect on the drawability of 22MnB5 steel; a greater corner radius can improve the anti-wrinkle performance of the corner region.