超精密切削用刀具超声激振机构的设计 |
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引用本文: | 谢晓丹,Duong Camvinh,李勇,Ahmed Al-Zahrani.超精密切削用刀具超声激振机构的设计[J].清华大学学报(自然科学版),2012(7):956-961. |
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作者姓名: | 谢晓丹 Duong Camvinh 李勇 Ahmed Al-Zahrani |
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作者单位: | 清华大学制造工程研究所,摩擦学国家重点实验室 |
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基金项目: | 清华大学摩擦学国家重点实验室自主研究课题(SKLT09A04) |
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摘 要: | 该文设计一种基于夹心式压电陶瓷结构的刀具超声激振机构,用于超声振动辅助金刚石刀具进行超精密切削。通过分析超精密切削技术需求,提出了激振机构结构设计方案,进行了解析设计和有限元仿真分析,制作出激振机构,进行了性能测试,并开展了超声振动辅助切削的可行性实验。研制的激振机构可实现频率42.0kHz、振幅峰峰值8μm的超声激振,并在超声振动辅助金刚石刀具超精密切削中表现出良好效果,切削模具钢工件端面达到表面粗糙度Ra 0.018~0.05μm。
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关 键 词: | 超声振动辅助切削 刀具激振机构 夹心式压电陶瓷 有限元法 |
Ultrasonic tool vibrator for vibration-assisted ultra-precision cutting |
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Institution: | XIE Xiaodan,Duong Camvinh,LI Yong,Ahmed Al-Zahrani(State Key Laboratory of Tribology,Institute of Manufacturing Engineering,Tsinghua University,Beijing 100084,China) |
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Abstract: | Ultrasonic vibration-assisted cutting is used in ultra-precision machining.This paper describes an ultrasonic tool vibrator based on a sandwiched piezoelectric transducer.Both acoustical methods and finite element analyses were used to design the sandwiched piezoelectric based vibrator.The vibrator has a vibration frequency of 42.0 kHz and an amplitude of 8 μm.This provides good vibration-assisted ultra-precision cutting of die steels,giving a surface roughness of Ra 0.018-0.05 μm. |
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Keywords: | ultrasonic vibration-assisted machining ultrasonic tool vibrator sandwiched piezoelectric transducer finite element analysis |
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