【摘要】 针对渐进成形工艺中板材厚度减薄的问题,以典型锥形件为例,运用ABAQUS建立的弹塑性有限元模型,研究了半顶角(α)、工具头直径(D)和层间距(ΔZ)等工艺参数对零件渐进成形的影响。结果表明,半顶角是影响板材成形性能的重要因素,半顶角越大,制件最小壁厚越大,板材变形越均匀;小的层间距和大的成形头直径有利于获得应变分布均匀和表面质量较好的制件;工具头直径减小、层间距减小和半顶角较小,都可以获得较小的轴向成形力。经实验验证,数值模拟结果基本与实际吻合。更多还原

【Abstract】 In order to find a method to reduce excessive sheet thinning of parts by incremental sheet forming,taking typical conical part as an example,an elastic-plastic finite element model was developed using ABAQUS,then the influences of some relevant process parameters were discussed,such as half-apex angle(α),tool diameter(D) and step increment(ΔZ).The results show that half-apex angle is the dominating process parameter to impact the formability of material,as the half-apex angle increases,the smallest thickness of part increases and the deformation of sheet is more uniform.Small step size and big tool diameter have a good influence on strain distribution and surface quality;as the tool diameter,step size and half-apex angle decrease,the axial forming force is smaller.The simulation results are in good agreement with experimental results.更多还原