Titanium wire drawing with longitudinal-torsional composite ultrasonic vibration
Titanium wire drawing with longitudinal-torsional composite ultrasonic vibration
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DOI：
10.1007/s00170-015-7540-1
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
Chongqiu Yang;X. Shan;T. Xie
中科院分区：
文献类型：
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作者：
Chongqiu Yang;X. Shan;T. Xie
与传统拉丝工艺能耗高、表面粗糙的缺点相比，研究了扭转-往复复合超声振动对钛丝拉丝过程的影响。从摩擦力和应力、拉拔力和应力以及加工后的线材表面质量等方面对影响进行了数值分析和实验研究。分析表明，扭转超声振动会在一定程度上增加拉丝过程中的摩擦力，但幅度不大，而纵向超声振动则明显有利于降低拉丝过程中的摩擦力。纵向振动和L&T复合振动都有利于降低拉拔力和改善钛丝的塑性变形，特别是后者。此外，纵向超声振动由于减小了摩擦力，可以提高加工线材的表面质量。L&T复合超声振动由于其在接触区域内的摩擦力略高，可以以牺牲表面质量为代价提供所需的塑性变形能量，从而显著降低拉深力。本研究为超声钛丝拉拔工艺提供了一种新的方法。
Compared with the conventional wire drawing process without ultrasonic vibration, which leads to high energy consumption and rough surface finish, the influences of longitudinal-torsional (L&T) composite ultrasonic vibration on titanium wire drawing process were investigated. The effects were discussed both numerically and experimentally in terms of friction force and stress, drawing force and stress, and processed wire surface quality. The analysis indicates that torsional ultrasonic vibration would increase the friction force in some extent, but only modestly, while longitudinal ultrasonic vibration is apparently beneficial to reducing the friction force in wire drawing process. Furthermore, both the longitudinal vibration and the L&T composite vibration are beneficial to decreasing the drawing force and improving the plastic deformation of titanium wires, especially for the latter. In addition, the longitudinal ultrasonic vibration could improve the surface quality of processed wires due to the friction force reduction. The L&T composite ultrasonic vibration could apparently reduce the drawing force as the result of its slight higher friction force within the contact area, which could provide the required plastic deformation energy at the cost of surface quality. The present research provides a new methodology for the ultrasonic titanium wire drawing process.