Feasibility study of high-speed ultrasonic vibration cutting titanium alloy
Feasibility study of high-speed ultrasonic vibration cutting titanium alloy
复制标题
高速超声振动切削钛合金的可行性研究
DOI：
10.1016/j.jmatprotec.2017.03.017
复制
发表时间：
2017-09-01
影响因子：
6.3
通讯作者：
Wu, Ruibiao
中科院分区：
文献类型：
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作者：
Sui, He;Zhang, Xiangyu;Wu, Ruibiao
对于一系列独特的特性，钛合金已被广泛应用于航空和航空航天场。但是，差的可加工性使高速加工钛合金合金几乎没有预期的，即使由于高度切割温度而具有先进的工具材料。间歇性切割可能是降低切割温度并改善切割性能的有效方法。作为典型的间歇性切割方法，传统的超声振动切割（UVC）和椭圆形超声振动切割（EUVC）已取得了显着进步。但是，临界切割速度将它们限制在低速加工领域。本文提出了一种新型的超声振动切割，即高速超声振动切割（HUVC），其中振动始终与进料方向一起。尽管切割速度超过了传统的UVC和EUVC方法的临界速度，但工具和工件的分离可以在某些条件下实现。结果，它实现了在宏观水平上的高速切割，并在微观中切断了切割，并提高了钛合金的可加工性。首先，建立了HUVC过程的理论模型，并全面分析了HUVC的分离标准和占空比。然后，与常规切割（CC）和传统的超声振动切割（UVC）相比，对HUVC方法切割TI-6AL-4 V的可行性进行了实验验证。结果表明，由于工具磨损显着降低，在最佳情况下，HUVC中的工具寿命延长了300％。此外，与CC方法相比，削减效率提高了90％。此外，还实现了连续切割过程中大约50％的显着切割力降低约50％，并改善了表面粗糙度。 （c）2017 Elsevier B.V.保留所有权利。
For a series of unique properties, titanium alloy has been widely applied in aviation and aerospace fields. However, the poor machinability makes high-speed machining titanium alloy hardly perform as expected even with advanced tool materials due to the high cutting temperature. Intermittent cutting could be an effective method to decrease the cutting temperature and improve the cutting performance. As typical intermittent cutting methods, traditional ultrasonic vibration cutting (UVC) and elliptical ultrasonic vibration cutting (EUVC) have achieved significant advancements. However, the critical cutting speed confines them to the field of low speed machining. This article proposed a new type of ultrasonic vibration cutting, i.e. high-speed ultrasonic vibration cutting (HUVC), in which the vibration is always along with the feed direction. The separation of the tool and workpiece can be realized under some certain conditions although the cutting speed exceeds far away from the critical speed of the traditional UVC and EUVC methods. As a consequence, it realized high speed cutting on a macro level and intermittent cutting in the micro, and improved the machinability of titanium alloy. Firstly, a theoretical model of HUVC process was established and both of the separation criteria and the duty cycle of HUVC were fully analyzed. Then the feasibility of HUVC method for cutting Ti-6Al-4 V was verified experimentally compared with conventional cutting (CC) and traditional ultrasonic vibration cutting (UVC). The results demonstrated that tool life in HUVC were extended by 300% in an optimal situation due to the significantly tool wear reduction. Besides, the cutting efficiency increased by 90% compared with CC method obviously. Furthermore, significant cutting force reduction about 50% and better surface roughness improvement in a successive cutting process were also achieved. (C) 2017 Elsevier B.V. All rights reserved.