7075铝合金厚板多道次蛇形热轧的分析与预测

发布时间：2018-03-04 02:11

本文选题：多道次蛇形轧制　切入点：铝合金厚板　出处：《光学精密工程》2017年04期 　论文类型：期刊论文

【摘要】：研究了蛇形轧制工艺参数对铝合金厚板变形与残余应力分布的影响。基于蛇形轧制的咬入条件与本构模型以及边界条件等关键技术,构建了铝合金厚板的单道次蛇形轧制有限元模型,并与相关文献的仿真结果进行了比较,结果显示其相对误差不超过10%。考虑最小、最大压下量均相等的条件下压下量分配对蛇形轧制的影响,建立了多道次蛇形轧制的有限元模型并进行了仿真实验。结果表明:铝厚板应变不是按板厚中心面呈对称分布,慢速辊一侧的应变明显小于快速辊一侧,而且压下量对称递增分配产生的应变最大,单向递增分配产生的应变最小,对称递增比单向递增分配压下量产生的应变平均要高出20%左右。此外,压下量对称递减分配引起的剪切应变最大,单向递增分配引起的剪切应变最小,对称递减分配比单向递增分配压下量产生的剪切应变要高出2倍。
[Abstract]:The effect of processing parameters on deformation and residual stress distribution of thick aluminum alloy plate was studied. Based on the key techniques of snake-rolling, such as bite condition, constitutive model and boundary conditions, etc. The finite element model of single-pass serpentine rolling of aluminum alloy thick plate is constructed and compared with the simulation results of related literatures. The results show that the relative error is not more than 10. Under the condition that the maximum reduction is equal, the finite element model of multi-pass serpentine rolling is established and the simulation experiment is carried out. The results show that the strain of aluminum thick plate is not symmetrically distributed according to the center of plate thickness. The strain on the side of the slow roll is obviously smaller than that on the side of the fast roller, and the strain produced by the symmetrical incremental distribution of the reduction amount is the largest, and the strain produced by the one-way incremental distribution is the smallest. In addition, the shear strain caused by symmetrical decreasing distribution is the largest, and the shear strain caused by one-way incremental distribution is the smallest. The shear strain produced by symmetric decreasing distribution is 2 times higher than that of unilateral increasing distribution.
【作者单位】：南昌航空大学航空制造工程学院;
【基金】：国家自然科学基金资助项目(No.51465045,No.51165039) 江西省主要学科学术和技术带头人资助计划航空科学基金资助项目(No.2016ZE56011) 江西省自然科学基金资助项目(No.20161BAB206114) 深圳市科技创新委员会基础研究项目(No.JCYJ2014050917410668)
【分类号】：TG339;V252.2

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