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中文摘要：
采用有限元方法研究多向加载成形,对1045钢、7075铝合金两种典型材料的四通阀多向加载成形过程进行了数值模拟。研究了加载路径、成形材料、模具预热温度、凸模加载速度等因素对四通阀多向加载成形过程的影响。结果表明,调整加载路径可降低合模力并改善凸模受力不均;不合理的加载路径可导致碳钢材料四通阀锻件中出现微裂纹,在本文实验条件下加载路径对铝合金锻件中损伤的影响可忽略;对于碳钢材料的四通阀成形,可不预热模具。
英文摘要：
The finite element method was adopted to research on the multi-way loading process,and the numerical simulations of multi-way loading forming for 1045 steel and 7075 aluminum alloy cross valve were carried out.The influences of loading path,material,initial temperature of dies,speed of male dies on the forming process were analyzed.The results of the present study indicate that through adjusting loading path,the load of female die and the unbalanced load of male dies could be decreased;unreasonable loading path could cause crack in the steel forging,and the influence of loading path on damage in the aluminum alloy forging may be ignored under the forming conditions used.The dies may avoid preheating during multi-way loading forming of steel cross valve.
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