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首页> 外文会议>International Conference on Machining, Materials and Mechanical Technologies >Controlling Wrinkling and Flatness during the Processing of the Bend Section of a Pipe by Applying Vibration to the Mandrel
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Controlling Wrinkling and Flatness during the Processing of the Bend Section of a Pipe by Applying Vibration to the Mandrel

机译：通过向心轴施加振动处理管道的弯曲部分期间控制皱折和平坦度

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摘要

Metal pipes have a long history as fluid conduits, and are commonly joined with components such as elbows to form bent transport paths. However, with the increasing demands for economy and energy saving, pipes with reduced joints and thinner walls are desired. The number of joints can be reduced by a drawing and bending process that forms a bend section at any position in the pipe. However, this approach incurs problems such as wrinkling and flattening, especially under conditions of large bending angle, decreased bending radius, and thin pipe walls. In this research, applying vibrations to the mandrel was trialed as an approach for controlling the wrinkle depth and flattening. First, processing experiments were performed on thin walled pipes (wall thickness = 0.5 mm; outer diameter = 14 mm). The change of flattening and the number and depths of wrinkles were investigated in the presence and absence of vibrations. Next, simulations were performed using the commercial nonlinear finite element software. Through these simulations, the flatness and appearance of wrinkles were analyzed by modeling the behavior and distribution of stresses and strains in the processing process. The application of vibration to the mandrel appears to be a promising approach for controlling the wrinkling and flattening problems during pipe processing.
机译：金属管具有悠久的历史，作为流体导管，并且通常与诸如肘部等部件连接以形成弯曲的传输路径。然而，随着对经济和节能的需求不断增加，需要具有减少的接头和较薄的壁的管道。可以通过在管道中的任何位置形成弯曲部分的拉伸和弯曲过程来减小关节的数量。然而，这种方法引起了皱纹和平坦化的问题，特别是在大弯曲角度，弯曲半径减小和薄管壁的条件下。在这项研究中，试验对心轴的振动作为控制皱纹深度和平整的方法。首先，在薄壁管（壁厚= 0.5mm;外径= 14mm）上进行处理实验。在存在和没有振动的情况下，研究了扁平化的变化和皱纹的数量和深度。接下来，使用商业非线性有限元件进行仿真。通过这些模拟，通过在加工过程中建模应力和菌株的行为和分布来分析皱纹的平坦度和外观。振动向心轴施加似乎是一种有希望的方法，用于控制管道处理期间的皱纹和平坦问题。

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