超声振动切削对耦合颤振的影响

doi:10.7527/S1000-6893.2015.0230

材料工程与机械制造

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超声振动切削对耦合颤振的影响

隋翯, 张德远, 陈华伟, 张翔宇

北京航空航天大学机械工程及自动化学院, 北京 100083

收稿日期:2015-05-22 修回日期:2015-08-18 出版日期:2016-05-15 发布日期:2015-09-02
通讯作者: 张德远,Tel.:010-82317707 E-mail:zhangdy@buaa.edu.cn E-mail:zhangdy@buaa.edu.cn
作者简介:隋翯,男,博士研究生。主要研究方向:超声振动切削。Tel:010-82316604 E-mail:suihe0514@163.com;张德远,男,教授,博士生导师。主要研究方向:功率超声与振动加工。Tel:010-82317707 E-mail:zhangdy@buaa.edu.cn
基金资助:
黑龙江省应用技术研究与开发计划(GA12A402)

Influence of ultrasonic vibration cutting on mode-coupling chatter

SUI He, ZHANG Deyuan, CHEN Huawei, ZHANG Xiangyu

School of Mechanical Engineering and Automation, Beihang University, Beijing 100083, China

Received:2015-05-22 Revised:2015-08-18 Online:2016-05-15 Published:2015-09-02
Supported by:
Applicated Research and Development Plan of Heilongjiang Province(GA12A402)

摘要/Abstract

摘要：

以耦合颤振为研究对象,通过理论分析和实验测量,研究了超声振动切削(UVC)方法对其影响及机理。超声振动切削可以通过控制系统能量摄入抑制耦合颤振。一方面,确定系统发生耦合颤振具有临界能量阀值,系统摄入能量为瞬时切削功率在净切削时间内的积分;建立的临界切削深度模型,表明超声振动切削可以增大临界切深,这表示系统具有更大的切削功率阀值,其原因是超声振动切削方法净切削时间减少,从而在一定切削时间内维持系统能量摄入总量不变,保证切削系统的稳定。另一方面,在相同条件下,超声振动切削可以有效降低平均切削力,减少系统摄入的能量,从而减弱耦合颤振的振动幅度,对其进行抑制。使用自行研制的弱刚度镗杆进行了对比实验,实验结果表明:超声振动切削可以增大临界切削深度且临界切深与占空比成反比;在相同条件下减小了系统振动幅度,获得了更好的加工质量。

关键词: 超声加工, 模态耦合, 颤振, 弱刚度, 镗削, 稳定性

Abstract:

This paper analyses the influence of ultrasonic vibration cutting (UVC) on the mode-coupling chatter through both theoretical model and experimental measurement. UVC method can suppress the mode-coupling chatter by decreasing the input energy of a cutting system. On the one hand, there is an energy threshold of mode-coupling chatter for a determined system, which is the integral of cutting power in cutting time. The established critical cutting depth model shows that UVC method can enlarge the critical cutting depth. It means in a shorter cutting time, UVC system can sustain larger cutting power and keep the energy threshold uncharged, maintaining the system stable. On the other hand, under the same condition, UVC method reduces effectively the cutting force and system input energy to suppress the mode-coupling chatter. Experiments have been conducted using the weak stiffness boring bar. The results indicate that UVC method can enlarge the critical cutting depth and the critical cutting depth is in inverse proportion to duty ratio; UVC method can reduce the chatter amplitude and obtain better cutting quality.

Key words: ultrasonic machining, mode-coupling, chatter, low-rigidity, boring, stability

中图分类号:

V261.92

隋翯, 张德远, 陈华伟, 张翔宇. 超声振动切削对耦合颤振的影响[J]. 航空学报, 2016, 37(5): 1696-1704.

SUI He, ZHANG Deyuan, CHEN Huawei, ZHANG Xiangyu. Influence of ultrasonic vibration cutting on mode-coupling chatter[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(5): 1696-1704.

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E-mail：hkxb@buaa.edu.cn

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超声振动切削对耦合颤振的影响

Influence of ultrasonic vibration cutting on mode-coupling chatter

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