A predictive model of critical depth of cut for ultrasonic elliptical vibration cutting of brittle materials

2019 ◽  
Author(s):  
Weihai Huang ◽  
Deping Yu ◽  
Xinquan Zhang ◽  
Min Zhang ◽  
Dongsheng Chen
Keyword(s):  
Predictive Model ◽  
Brittle Materials ◽  
Depth Of Cut ◽  
Critical Depth ◽  
Elliptical Vibration Cutting ◽  
Vibration Cutting ◽  
Elliptical Vibration ◽  
Critical Depth Of Cut ◽  
Ultrasonic Elliptical Vibration

Development of Elliptical Vibration Cutting Technology and its Application to Ultraprecision/Micro Machining of Hard/Brittle Materials

2009 ◽  
Vol 69-70 ◽  
pp. 133-137 ◽  
Author(s):  
Eiji Shamoto ◽  
Norikazu Suzuki
Keyword(s):  
Brittle Materials ◽  
Tungsten Alloy ◽  
Depth Of Cut ◽  
Micro Machining ◽  
Elliptical Vibration Cutting ◽  
Vibration Cutting ◽  
Elliptical Vibration ◽  
Ductile Machining ◽  
Critical Depth Of Cut ◽  
Ultrasonic Elliptical Vibration

Precision machining, named ‘elliptical vibration cutting’, and its application to ultraprecision / micro machining of some hard / brittle materials are introduced in the present paper. The elliptical vibration cutting has a superior cutting performance in terms of low cutting force, low cutting energy, low heat generation, long tool life for steels, sintered tungsten alloy, etc., and large critical depth of cut for ductile machining of brittle materials such as glasses and single crystal calcium fluoride, etc. Based on these basic advantages, practical ultraprecision / micro machining of the hard / brittle materials is successfully realized by employing the ultrasonic elliptical vibration tools, which have been developed for ultraprecision machining.

Modeling of the Effect of Machining Parameters on Maximum Thickness of Cut in Ultrasonic Elliptical Vibration Cutting

2011 ◽  
Vol 133 (1) ◽  
Author(s):  
Chandra Nath ◽  
Mustafizur Rahman ◽  
Ken Soon Neo
Keyword(s):  
Brittle Materials ◽  
Cutting Speed ◽  
Role Playing ◽  
Machining Parameters ◽  
Elliptical Vibration Cutting ◽  
Tool Vibration ◽  
Vibration Cutting ◽  
Elliptical Vibration ◽  
Hard And Brittle Materials ◽  
Ultrasonic Elliptical Vibration

In recent years, the ultrasonic elliptical vibration cutting (UEVC) technique has been found to be an efficient method for the ultraprecision machining of hard and brittle materials. During the machining at a given nominal depth of cut (DOC), the UEVC technique, because of its inherent mechanism, effectively reduces the thickness of cut (TOC) of the workpiece material through overlapping vibration cycles. For the ductile machining of hard and brittle materials, this TOC plays a critical role. However, the relationships between the nominal DOC, the TOC, and the relevant machining parameters have not yet been studied. In this study, the role playing machining parameters for the TOC are firstly investigated and then theoretical relations are developed for predicting the maximum TOC (TOCm) with respect to the relevant machining parameters. It is found that four machining parameters, namely, workpiece cutting speed, tool vibration frequency, and tangential and thrust directional vibration amplitudes, influence the TOCm. If the speed ratio (ratio of the workpiece cutting speed to the maximum tool vibration speed in the tangential direction) is within a critical value 0.12837, then a reduced TOCm can be obtained. It is also realized that if the TOCm can be kept lower than the critical DOC (DOCcr), then ductile finishing of brittle materials can be achieved. The above phenomenon has been substantiated by experimental findings while machining a hard and brittle material, sintered tungsten carbide. The findings suggest that the same concept can be applied for the ductile cutting of other hard and brittle materials.

Development and optimization of ultrasonic elliptical vibration cutting device based on single excitation

2021 ◽  
pp. 1-29
Author(s):  
Sen Yin ◽  
Zhigang Dong ◽  
Yan Bao ◽  
Renke Kang ◽  
Wenhao Du ◽  
...  
Keyword(s):  
Cutting Speed ◽  
Tungsten Alloy ◽  
Asymmetric Structure ◽  
Diamond Cutting ◽  
Elliptical Vibration Cutting ◽  
Vibration Cutting ◽  
Elliptical Vibration ◽  
Technical Capability ◽  
Diamond Cutting Tool ◽  
Ultrasonic Elliptical Vibration

Abstract Ultrasonic elliptical vibration cutting (UEVC) technique, as an advanced cutting method, has been successfully applied to machine difficult-to-cut materials for the last decade. In this study, the mechanism of the elliptical vibration locus caused by the “asymmetric structure” of the horn was analyzed theoretically firstly, and the corresponding relationship between the degree of asymmetry and the elliptical vibration locus was determined based on finite element method (FEM). Then an efficient single-excitation UEVC device with “asymmetric structure” was developed and optimized. The resonant frequency of the device was 40.8 kHz, and the amplitude reached 12.4 µm, which effectively broke the limitation of cutting speed in UEVC. Finally, the UEVC device's performance was tested, and the advantages in improving the tungsten alloy surface quality and reducing diamond cutting tool wear validated the technical capability and principle of the proposed device.

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