摘要
挤压模具在铝型材挤压生产中起着至关重要的作用,挤压模具设计的优劣直接影响挤压产品的质量。然而实际生产中,挤压模具的设计更多依赖传统设计经验,需要多次试模和修模,无法满足产品开发需求。以典型的多腔壁板铝型材为例,应用UG建立分流组合模几何模型,采用基于任意拉格朗日—欧拉(Arbitrary Largrang-Euler,ALE)算法的HyperXtrude软件对多腔壁板铝型材的挤压成形过程进行数值模拟,获得挤压过程中速度场、温度场、应力场及金属流动情况。针对初始模具设计的不足,提出多腔壁板铝型材挤压模具优化三步曲(开设引流槽、增设阻流块、优化工作带),有效地解决了初始模具设计中速度分布不均的问题。利用数值模拟方法可以优化模具结构,提出的多腔壁板铝型材挤压模具优化三步曲对同类铝型材挤压模具结构设计具有一定的指导意义。
The extrusion die plays a crucial role in the process of aluminum alloy profile production and its design determines the quality of products.However,the design of extrusion die in practice mainly depends on the traditional design experience,thus many times of modifications and experiments are needed to gain an acceptable product.The geometrical solid model of the porthole die for an aluminum multi-cavity wallboard profile is established by using UG.The extrusion process of the multi-cavity wallboard profile is simulated by using arbitrary Lagrange-Euler（ALE） algorithm based HyperXtrude software.The distributions of the velocity field,the temperature field and the stress field in the extrusion process are investigated and the metal flow process is analyzed in details.With the simulation results of the initial die design,a non-uniform velocity distribution is observed.To solve the problem of the non-uniform velocity distribution,three steps of the die optimization for the multi-cavity wallboard profile are proposed,including establishment of drainage channel,introduction of baffle plate and optimization of die bearing.The optimization results show that the die optimization method based on numerical simulation is valid and it can provide guidelines for the die design of the same kind profiles.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2011年第22期61-68,共8页
Journal of Mechanical Engineering
基金
国家科技支撑计划(2009BAG12A07-B01)
山东省自然科学基金(Z2008F09)
中国博士后科学基金(20100481247)资助项目
关键词
多腔壁板
数值模拟
模具优化三步曲
Multi-cavity wallboard Numerical simulation Three steps of die optimization
