QAl10-4-4轴瓦精密冷辗成形的数值模拟与分析

发布时间：2018-06-01 00:33

本文选题：轴瓦 + 冷辗成形　；参考：《锻压技术》2016年12期

【摘要】：轴瓦冷辗成形是毛坯材料在外载荷作用下所经历的非稳态、非线性的塑性变形。为了进一步探究轴瓦冷辗成形中金属塑性变形机理,在ABAQUS平台下建立滑动轴承轴瓦径向冷辗成形的三维有限元模型,对QAl10-4-4轴瓦的冷辗过程进行数值模拟,分析了冷辗过程中轴瓦的塑性变形规律及成形特点,并在精密冷辗环机上进行了冷辗试验。结果显示:冷辗过程中,轴瓦塑性变形从内、外表面向中间层移动,且较大等效应变出现在内、外表面处,中间区域等效应变较小,冷辗成形的模拟结果和理论研究相吻合;试验所得轴瓦尺寸精度为0.05 mm,内、外表面的圆度为0.03 mm、表面粗糙度为0.8μm,轴瓦成形质量较好。
[Abstract]:The cold rolling of bearing bush is an unsteady and nonlinear plastic deformation of the blank material under external load. In order to further explore the mechanism of metal plastic deformation in cold rolling forming of bearing, a three-dimensional finite element model of radial cold rolling forming of journal bearing bush was established on ABAQUS platform, and the cold rolling process of QAl10-4-4 bearing bush was simulated numerically. The plastic deformation law and forming characteristics of bearing bush during cold rolling are analyzed, and cold rolling test is carried out on precision cold ring rolling machine. The results show that the plastic deformation of the bush moves from the inner and outer surface to the middle layer during the cold rolling process, and the larger equivalent strain appears in the outer surface, and the equivalent strain in the middle region is smaller at the outer surface. The simulation results of the cold rolling forming are in agreement with the theoretical study. The precision of bearing bush is 0.05 mm, the roundness of inner and outer surface is 0.03 mm, the surface roughness is 0.8 渭 m, and the forming quality of bearing bush is better.
【作者单位】：贵州大学机械工程学院;
【基金】：贵州省科学技术厅、贵州大学联合资金项目(黔科合LH字[2014]7622号)
【分类号】：V261.2

【参考文献】