A new model of the antifriction effect on wiredrawing with ultrasound
A new model of the antifriction effect on wiredrawing with ultrasound
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DOI：
10.1007/s00170-012-3976-8
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发表时间：
2012-03
期刊：
影响因子：
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通讯作者：
X. Shan;Haiqun Qi;Lili Wang;T. Xie
中科院分区：
文献类型：
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作者：
X. Shan;Haiqun Qi;Lili Wang;T. Xie
针对传统的经典库仑摩擦模型在描述超声振动拉丝过程中的摩擦效应时存在的不足，基于非局部摩擦原理，提出了一种新的超声振动拉丝的数学模型。摩擦应力分布、接触压力分布和拉拔力是通过使用泰勒级数、von Mises屈服准则、速度场定理、功率平衡分析和MATLAB®中开发的数值解方法获得的。三种不同的线，包括铜线，不锈钢丝，钛丝的超声减摩效果进行了评价。结果表明：超声对钛丝的减摩效果最明显，其次是不锈钢丝和铜丝;超声振幅对拉拔力的降低有明显影响，而拉拔速度对拉拔力的降低无明显影响。设计了超声拉丝实验系统。实验结果验证了建模和理论分析的有效性。本工作为预测金属，特别是难拉丝材料超声拉丝的接触力学和摩擦学性能提供了一种新的方法。
This paper presents a new mathematical model of wiredrawing with ultrasonic vibration based on the nonlocal friction theorem for overcoming the inadequacy in describing the friction effect by the conventional classical Coulomb friction model. The friction stress distribution, the contact pressure distribution, and the drawing force were obtained by employing Taylor’s series, von Mises yield criterion, the velocity field theorem, power balance analysis, and a numerical solution method developed in MATLAB®. The ultrasonic antifriction effects of three different wires, including a copper wire, a stainless steel wire, and a titanium wire, were evaluated. The results point out that the antifriction effect of ultrasound on the titanium wire is the most obvious and then followed by the stainless steel wire and the copper wire; the ultrasonic amplitude has observable effects on the drawing force reduction, while the drawing speed has no visible effect on the drawing force. The experimental system of wiredrawing with ultrasound was designed. The experimental results verify the validity of the modeling and the theoretical analysis. The present work provides a new methodology to predict the contact mechanics and tribology property of wiredrawing with ultrasound for metals, especially for difficult-to-draw materials.