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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。
Aiming at the thinning of sheet metal in progressive forming process, taking the typical conical part as an example, the half-apex angle (α), tool head diameter (D) and layer spacing (ΔZ ) And other process parameters on the part forming progressive impact. The results show that the half-apex angle is an important factor that affects the sheet forming performance. The larger the half-angle, the larger the minimum wall thickness of the part, the more uniform the sheet deformation. The small layer spacing and the large forming head diameter are conducive to obtaining uniform strain distribution And the surface quality of the better parts; tool head diameter decreases, the layer spacing and the smaller half-angle, you can get a smaller axial forming force. The experimental results show that the numerical simulation results are basically consistent with the actual.