摘要
为了研究铝合金轴类件楔横轧的变形机理,通过三维塑性有限元软件对它的成形过程进行了数值模拟,获得了楔横轧变形过程中的金属流动行为、应力分布、应变分布,以及轧制力与接触面积的变化曲线。结果表明,在成形过程中,轧件表面金属流动快,心部金属流动慢;应力先迅速增大到最大值后逐渐减小,以均匀的循环应力展宽轧件,结束时迅速降为零;随楔入深度的增加,应变迅速增大到最大值后,增加速率减缓;轧制力随轧件与模具接触面积的增大而增大,展宽时呈波浪状上下波动,轧制结束时降为零。结果能为探索铝合金轴类件楔横轧成形提供借鉴。
In order to investigate the deformation mechanism of aluminum alloy shaft parts cross wedge rolling, its forming process was numerically simulated by three-dimensional plastic finite element simulation software. The metal flow behavior, the stress distribution, the strain distribution as well as the changing curve of rolling force with the contact area in the forming process were obtained. The results show that the metal flow of the rolled piece on the surface is faster, and that of in the core is slower; the stress increases first rapidly to a maximum value and then decreases gradually to a uniform cyclic stress to broaden, and reduces to zero at the end; with the wedge groove depth increasing, after the strain increases rapidly to a maximum value, increasing rate decreases; the rolling force increases with the increase of the contact area between die and workpiece, and the rolling force fluctuates up and down at stretching stage, and reduces to zero at the end of the rolling. The results can provide the reference for exploring the deformation of aluminium alloy shaft parts in cross wedge rolling.
出处
《热加工工艺》
CSCD
北大核心
2016年第3期128-131,135,共5页
Hot Working Technology
基金
广西大学重点实验室基金项目(14-A-02-05)
关键词
楔横轧
铝合金
轴类件
有限元模拟
cross wedge roiling （CWR）
aluminium alloy
shaft parts
finite element simulation
