研究了预成型时间和压力、挤出模具几何尺寸、助挤剂含量等对挤出物强度的影响。
The effects of preforming duration, preforming pressure, extrusion die's geometry size and content of lubricant on the extrudate's tensile strength were studied.
把回弹量作为修改模具几何的基础，本文给出了一个获得优化模具几何的迭代算法。
The springback is extracted to be a basis of modification of die geometry. An iteration algorithm is given to obtain the optimum geometry of die.
基于此，进一步分析了模具几何参数和工艺参数对回弹量的影响，为翼子板模具设计提供理论依据。
Based on this, the influence of the die geometry and process parameters on springback was further analyzed, which provides a theoretical basis for the front fender dies design.
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