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EXPERIMENTAL STUDY ON THE CUTTING FORCE DIFFERENCE BETWEEN ROTARY ULTRASONIC MACHINING AND CONVENTIONAL DIAMOND GRINDING OF K9 GLASS

2013; Taylor & Francis; Volume: 17; Issue: 1 Linguagem: Inglês

10.1080/10910344.2012.747930

1532-2483

Chun-Yang Zhao, Hu Gong, Feng Fang, Zhan Jie Li,

Tunneling and Rock Mechanics

Abstract A comprehensive experimental study on the cutting force differences between rotary ultrasonic machining (RUM) and conventional diamond side grinding, drilling and face grinding is conducted on K9 glass. By analyzing the experimental results and the kinematics of diamond grits, it can be seen that the reasons for the cutting force differences between with and without ultrasonic vibration are not same for the three machining processes. The cutting force difference of conventional diamond side grinding and RUM can be explained by analyzing the trajectory of diamond grits, while the cutting force difference of conventional diamond drilling and RUM is mostly dependent upon the difficulty level of removing chips. As a transitive form, the cutting force difference between conventional diamond face grinding and RUM is affected by both the diamond grits' trajectory and the difficulty level for removing chips. In addition, it is also noticed that different cutting tools have different reduction percentages of cutting forces in RUM compared with conventional diamond grinding. The findings are helpful for researchers to have a further understanding in RUM. Keywords: cutting forcegrindingrotary ultrasonic machining (RUM) ACKNOWLEDGMENT The authors appreciate supports of the National Natural Science Foundation of China (Grant No. 90923038), the National Basic Research Program of China (973 Program, Grant No. 2011CB706700). The authors are also grateful to Dr. X. F. Zhang and Mr. B. Wang from Tianjin MicroNano Manufacturing Tech Co., Ltd for their assistance in conducting the experiments. Notes a ΔF = F drilling − F RUM , where ΔF represents the cutting force difference between conventional diamond drilling and RUM, F drilling denotes the maximum cutting force of conventional diamond drilling and F RUM denotes the maximum cutting force of RUM. a All the definitions of F drilling , F RUM and ΔF are as same as the ones listed in Table 4.