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首页> 外文期刊>Journal of the Brazilian Society of Mechanical Sciences and Engineering >Numerical and experimental analysis of tube drawing with fixed plug
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Numerical and experimental analysis of tube drawing with fixed plug

机译:固定塞拔管的数值与实验分析

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摘要

Numerical simulation of manufacturing processes has become in the last years an important tool to improve these processes reducing lead times and try out, and providing products free of defects and with controlled mechanical properties. Finite Element Method (FEM) is one of the most important methods to simulate metal forming. In tube drawing with fixed plug both the outer diameter and the inner diameter of the tube are properly defined if correct process conditions are chosen for the die angle, drawing speed, lubrication and area reduction per pass. These conditions have great influence on drawing loads and residual stresses present in the product. In this work, the cold drawing of tubes with fixed plug was simulated by FEM with the commercial software MSC.Superform to find the best geometry of die and plug to reduce the drawing force. The numerical analysis supplied results for the reactions of the die and plug and the stresses in the tube, the drawing force and the final dimensions of the product. Those results are compared with results obtained from analytic models, and used tooling design. Experimental tests with a laboratory drawing bench were carried out with three different lubricants and two different lubrication conditions.
机译:近年来,制造过程的数值模拟已成为改善这些过程,减少交货时间和试用并提供无缺陷且机械性能受控的重要工具。有限元方法(FEM)是模拟金属成形的最重要方法之一。如果选择了正确的模具角,拉拔速度,润滑和每次通过的面积缩小的加工条件,则在带有固定塞子的管材拉拔中,必须正确定义管子的外径和内径。这些条件对产品中存在的拉拔载荷和残余应力有很大影响。在这项工作中,使用商业软件MSC.Superform对具有固定塞子的管的冷拔进行了模拟。Superform可以找到最佳的模具和塞子几何形状,以减小拉拔力。数值分析提供了模头和塞子的反应以及管中的应力,拉力和产品最终尺寸的结果。将这些结果与从分析模型和使用的工具设计中获得的结果进行比较。在实验室绘图台上使用三种不同的润滑剂和两种不同的润滑条件进行了实验测试。

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