基于胶层填充的薄板包边成形数值模拟及实验研究
收稿日期: 2020-12-23
网络出版日期: 2021-06-08
基金资助
国家自然科学基金资助项目(51975416)
Numerical Simulation and Experimental Research of Sheet Hemming Forming Based on Adhesive Filling
Received date: 2020-12-23
Online published: 2021-06-08
基于包边模型几何尺寸定义胶层填充率,通过有限元-光滑粒子流体动力学(FEM-SPH)法建立含胶包边工艺数值模拟模型,并与含胶包边实验进行对比验证,实现了折边胶直径、离边距、包边厚度对填充率影响的定量研究.研究结果表明:实验所得胶层流动、最终填充状态与数值模拟结果的一致性较好,实验所得胶层填充率与数值模拟结果吻合度较高,以此验证了数值模拟模型的可行性和准确性.进一步分析表明:折边胶直径、离边距、包边厚度对填充率的影响依次减小,并拟合得到填充率关于折边胶直径、离边距、包边厚度等工艺参数的关系式,为车身薄板含胶包边工艺的优化设计提供依据.
关键词： 胶层填充; 包边成形; 有限元-光滑粒子流体动力学; 车身门盖件
唐耿林, 李建军, 李元辉, 张珑耀, 朱文峰 . 基于胶层填充的薄板包边成形数值模拟及实验研究[J]. 上海交通大学学报, 2022 , 56(4) : 523 -531 . DOI: 10.16183/j.cnki.jsjtu.2020.429
The filling rate of adhesive is defined based on the geometric dimensions of the hemming model, and the numerical simulation model of the hemming process with adhesive is established by using the finite element method-smoothed particle hydrodynamics (FEM-SPH) method. By comparing and verifying with the hemming experiment with adhesive, the quantitative study of the influences of the hemming adhesive diameter, the edge distance, and the hemming thickness on the filling rate is realized. The research results show that the flow state and the final filling state of the adhesive layer obtained in the experiment are similar to the numerical simulation results, and the filling rate of the adhesive layer obtained in the experiment is highly consistent with the numerical simulation result, which verifies the feasibility and accuracy of the numerical simulation model. Further analysis shows that the influences of the hemming adhesive diameter, the edge distance, and the hemming thickness on the filling rate decrease in order, and the relationship formulas between the filling rate and process parameters, such as the hemming adhesive diameter, the edge distance, and the hemming thickness, are obtained by fitting, which provides a basis for the optimization design of the hemming process with adhesive of the automobile body sheet.
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