Investigations on the critical feed rate guaranteeing the effectiveness of rotary ultrasonic machining

被引：38
|
作者：
Wang, Jianjian [1 ,2 ]
Feng, Pingfa [1 ,3 ]
Zhang, Jianfu [1 ,2 ]
Cai, Wanchong [1 ,2 ]
Shen, Hao [1 ,2 ]
机构：
[1] Tsinghua Univ, Dept Mech Engn, State Key Lab Tribol, Beijing 100084, Peoples R China
[2] Beijing Key Lab Precis Ultra Precis Mfg Equipment, Beijing 100084, Peoples R China
[3] Tsinghua Univ, Grad Sch Shenzhen, Div Adv Mfg, Shenzhen 518055, Peoples R China
来源：
ULTRASONICS | 2017年 / 74卷
基金：
北京市自然科学基金; 中国国家自然科学基金;
关键词：
Rotary ultrasonic machining; Brittle material; Material removal rate; Cutting force; CUTTING FORCE; PREDICTION;
D O I：
10.1016/j.ultras.2016.10.003
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Rotary ultrasonic machining (RUM) is a well-known and efficient method for manufacturing holes in brittle materials. RUM is characterized by improved material removal rates, reduced cutting forces and reduced edge chipping sizes at the hole exit. The aim of this study is to investigate the critical feed rate to guarantee the effectiveness of RUM. Experimental results on quartz glass and sapphire specimens show that when the feed rate exceeds a critical value, the cutting force increases abruptly, accompanied by a significant decrease of ultrasonic amplitude. An analytical model for the prediction of critical feed rates is presented, based on indentation fracture mechanic and the theory of impact of vibrating systems. This model establishes the theoretical relationships between the critical feed rate, idling resonant ultrasonic amplitude and spindle speed. The results predicted by the analytical model were in good agreement with the experimental results. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：81 / 88
页数：8
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