Effects of Annealing and Training on NiTi Alloy Ring for Clamping Device
Effects of Annealing and Training on NiTi Alloy Ring for Clamping Device
复制标题
退火和调训对夹紧装置用镍钛合金环的影响
DOI：
10.1080/10426914.2015.1127950
复制
发表时间：
2016
影响因子：
4.8
通讯作者：
Luo Y. Q.
中科院分区：
文献类型：
--
作者：
Li W.;Zhou Z. X.;Xiao H.;Huang X. M.;Luo Y. Q.
具有双向形状记忆效应的环形或管状形状记忆合金(SMA)已被应用于高速精密微机械系统。研究了NiTi合金环的TWSME成形过程，分析了退火热处理和形变热处理对成形的影响。结果表明，TWSME分别在退火温度、加载变形量、训练温度和循环次数方面有一个极大值。在训练过程中，SMA环的TWSME早于结构尺寸稳定。热处理和训练改变了SMA环的相变温度，这对SMA环在夹紧装置中的应用有负面影响。研制了一种Ni-49.2at%Ti材料的样环，并将其应用于高种子精度的微主轴。对其在静态和超高速旋转条件下的性能进行了测试。结果表明，本文研制的环件满足高速精密微机械系统的操作和夹紧要求。
Shape memory alloys (SMAs) in the form of rings or tubes with two-way shape memory effect (TWSME) have been applied to high-speed precision micro-mechanical systems. This study investigates the development of NiTi alloy rings with TWSME and analyzes the effects of annealing and thermo-mechanical treatments. The results show there is a maximum in TWSME with respect to annealing temperature, loading deformation, training temperature, and cycle, respectively. The TWSME of SMA rings stabilizes earlier than structure dimension during training. The annealing and training change phase transition temperatures, which has a negative effect on the SMA ring with application to clamping device. A prototype ring made of Ni-49.2 at%Ti was developed and applied to a high-seed precision micro-spindle. Its performance under static and ultra-high speed rotation conditions was tested. The results show the ring developed in this study satisfies the operation and clamping requirements of high-speed precision micro-mechanical systems.