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Abstract：
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Rotary draw bending is an advanced forming process for manufacturing tubes with high quality and high effi- ciency.It can effectively prevent forming defects,such as wrinkles,wall thinning and cross-section distortion degrec~ Using simulation software DEFORM-3D,the tube bending process was simulated and the position of the most thin- nest wall thickness was found.The influence law of some process parameters on wall thickness was obtained through numerical simulation in tube bending.The parameters included the clearance between the tube and the mandrel and an- gular velocity of the mandrel and velocity of pressure die.The results indicate that the larger the clearance is,the smal- ler change of wall thickness is.With the increase of mandrel angular velocity,the change of tube wall thickness is smaller and then it becomes larger.When mandrel angular velocity is the same as the roller angular velocity,the wall thickness change is the smallest.With the increase of pressure die velocity,the change of wall thickness is smaller,the velocity is 64.28 mm·s~(-1),and the wall thickness change is the smallest.Using optimized parameter in numerical sim- ulation,workpieces were manufactured on bending machine with high quality without wrinkles.And the result is basi- cally consistent between numerical simulation and experiment.
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Funds：
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河南省科技厅自然科学基金(0511050900)
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AuthorIntro：
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Reference：
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