直刃尖刀超声辅助切割Nomex蜂窝芯切削力分析

doi:10.3901/JME.2017.19.073

机械工程学报 ›› 2017, Vol. 53 ›› Issue (19): 73-82.doi: 10.3901/JME.2017.19.073

• 特邀专栏：超声加工技术 • 上一篇下一篇

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直刃尖刀超声辅助切割Nomex蜂窝芯切削力分析

王毅丹, 王宣平, 康仁科, 孙健淞, 贾振元, 董志刚

大连理工大学精密与特种加工教育部重点实验室大连 116024

收稿日期:2016-12-20 修回日期:2017-03-09 出版日期:2017-10-05 发布日期:2017-10-05
通讯作者: 董志刚(通信作者),男,1980年出生,博士,副教授,硕士生导师,主要研究方向为难加工材料高效加工技术,精密超精密加工技术,E-mail:dongzg@dlut.edu.cn
作者简介:王毅丹,男,1989年出生,博士研究生。主要研究方向为超声辅助加工技术与装备,E-mail:wangyidan@mail.dlut.edu.cn;王宣平,男,1979年出生,博士,副教授,硕士研究生导师。主要研究方向为高表面完整性加工技术,;E-mail:xpwang@dlut.edu.cn;康仁科,男,1962年出生,教授,博士研究生导师。主要研究方向为超精密与特种加工技术、难加工材料高效加工技术、计算机辅助设计与制造,E-mail:kangrk@dlut.edu.cn;孙健淞,男,1992年出生。主要研究方向为复合材料超声辅助加工技术与装备,E-mail:sjs_06@qq.com;贾振元,男,1963年出生,博士,教授,博士研究生导师,长江学者特聘教授。主要研究方向为复合材料构件加工理论与工艺,E-mail:jzyxy@dlut.edu.cn
基金资助:
国家自然科学基金（51575085）、国家自然科学基金创新研究群体（51621064）和国家高技术研究发展计划（863计划，2015AA043402）资助项目。

Analysis of Influence on Ultrasonic-assisted Cutting Force of Nomex Honeycomb Core Material with Straight Knife

WANG Yidan, WANG Xuanping, KANG Renke, SUN Jiansong, JIA Zhenyuan, DONG Zhigang

Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024

Received:2016-12-20 Revised:2017-03-09 Online:2017-10-05 Published:2017-10-05

摘要/Abstract

摘要： 以直刃尖刀超声辅助切割Nomex蜂窝芯的简化模型为基础，建立基于脆性断裂力学理论的超声辅助切削动态力模型，并分情况讨论了刀具与材料间的相对运动关系。分析指出在不同振幅条件下，材料的切割破坏存在断续和连续两种形式，进而推导了切割过程中的切削力的理论公式。其中超声振幅、刀具前倾角、进给速度和超声频率等参数对材料切削力大小均有影响。在理论分析的基础上，开展了超声辅助切割Nomex蜂窝芯复合材料实验。试验结果表明，进给方向的超声振幅和刀具前倾角对切削力的影响较大：当进给方向的超声振幅从0到15 μm变化、刀具前倾角从15°到45°变化时，切削力均可降低70%~80%；进给速度和超声频率对于切削力影响较小：当进给速度从500到6000 mm/min变化12倍时，切削力仅变为1.5倍；超声频率35 kHz与15 kHz相比，切削力降低10%~30%。试验结果与理论分析结论一致。

关键词: Nomex蜂窝芯, 超声辅助切割, 切削力, 直刃尖刀

Abstract: Based on the simplified model of ultrasonic-assisted cutting for Nomex honeycomb core with straight knife, the dynamic force model for ultrasonic-assisted cutting is established based on brittle fracture theory. The relative motion relationships between the tool and the composites material are discussed in several cases. Analysis indicates that under different conditions there are two failure forms in breaking of the material, namely intermittent and continuous failure forms. Then the theoretical formula of the cutting force in cutting process is derived. The parameters of ultrasonic amplitude, forward angle of tools, feed rate and ultrasonic frequency are found to be of obvious influence on cutting force during the material cutting process. On the basis of theoretical analysis, the experiments of ultrasonic-assisted cutting Nomex honeycomb core are carried out. The results show that the ultrasonic amplitude in the feed direction and forward angle of tool have a great influence on the cutting force:As the ultrasonic amplitude in feed direction changes from 0 to 15μm, the forward angle of the tool changes from 15° to 45°,the cutting force reduced by 70%~80%;Meantime, feed rate and ultrasonic frequency have less influence on cutting force:As the feed rate changes from 500 mm/min to 6000 mm/min with a multiplication of 12 times, there is only a multiplication of 1.5 times with the cutting force. Compared with the case of 15 kHz, the cutting force reduced by 10% to 30% when the frequency is 35 kHz. The experimental results are in agreement with the theoretical analysis.

Key words: cutting force, Nomex honeycomb core, straight knife, ultrasound-assisted cutting

中图分类号:

V261
TH162

王毅丹, 王宣平, 康仁科, 孙健淞, 贾振元, 董志刚. 直刃尖刀超声辅助切割Nomex蜂窝芯切削力分析[J]. 机械工程学报, 2017, 53(19): 73-82.

WANG Yidan, WANG Xuanping, KANG Renke, SUN Jiansong, JIA Zhenyuan, DONG Zhigang. Analysis of Influence on Ultrasonic-assisted Cutting Force of Nomex Honeycomb Core Material with Straight Knife[J]. Journal of Mechanical Engineering, 2017, 53(19): 73-82.

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直刃尖刀超声辅助切割Nomex蜂窝芯切削力分析

Analysis of Influence on Ultrasonic-assisted Cutting Force of Nomex Honeycomb Core Material with Straight Knife

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