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基于Deform-3D平台,以规格型号为Ф219 mm×5 mm的TA2管坯的冷推弯曲过程为研究对象,建立了有限元仿真模型。选取管坯与芯棒的间隙、管坯与模具的间隙、摩擦系数为影响因素,以成形弯头的壁厚均值和端部截面椭圆度为评价指标,完成基于有限元仿真的虚拟正交试验研究。得出各成形参数对弯头成形的影响规律,确定弯头成形的优化工艺参数组合为内外间隙值1.0 mm、摩擦系数值0.06。验证试验结果表明,模拟及正交试验优化结果准确有效,弯头成形质量符合要求。
Based on the Deform-3D platform, the cold bending process of TA2 tube with the specification of Ф219 mm × 5 mm was studied, and the finite element simulation model was established. Select the gap between the tube blank and the mandrel, the gap between the tube blank and the mold, the friction coefficient as the influencing factors. Based on the average value of the wall thickness and the ellipticity of the end section, the virtual orthogonal experiment based on the finite element simulation the study. The influence of forming parameters on the forming of elbows was obtained. The optimal process parameters for elbow forming were determined to be 1.0 mm of internal and external clearances and 0.06 of friction coefficient. The results of the verification test show that the simulation and orthogonal test results are accurate and effective, and the elbow forming quality meets the requirements.