scholarly journals Study on Ti-6Al-4V Alloy Machining Applying the Non-Resonant Three-Dimensional Elliptical Vibration Cutting

Micromachines ◽  
2017 ◽  
Vol 8 (10) ◽  
pp. 306 ◽  
Author(s):  
Mingming Lu ◽  
Jiakang Zhou ◽  
Jieqiong Lin ◽  
Yan Gu ◽  
Jinguo Han ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Elliptical Vibration Cutting ◽  
Vibration Cutting ◽  
Elliptical Vibration

Study on Feed Offset in Elliptical Vibration Cutting

2014 ◽  
Vol 490-491 ◽  
pp. 600-606
Author(s):  
Jie Qiong Lin ◽  
Jin Guo Han ◽  
Dan Jing ◽  
Xian Jing
Keyword(s):  
Surface Topography ◽  
Surface Quality ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Curved Surface ◽  
Elliptical Vibration Cutting ◽  
Vibration Cutting ◽  
Elliptical Vibration ◽  
Tool Edge

Elliptical vibration cutting (EVC) process and three dimensional cutting surfaces are analyzed in this paper to understand the formation of surface topography. The model of EVC surface topography is established based on curved surface remove function under the assumption that the tool edge is sharp enough. And simulation analysis of surface topography is conducted with different feed offset ratios. Results indicate that RMS change with feed offset ratios λ. The range of RMS is larger when feed offset ratio ranges from both 0 to 0.4 and 0.6 to 1, while the range is smaller when feed offset ratio changes from 0.4 to 0.6. Whats more, RMS reaches the minimum when feed offset ratio is 0.5. The present research provides some references for reducing the height of vibration ripples and improving EVC surface quality.

A novel three-dimensional elliptical vibration cutting device based on the freedom and constraint topologies theory

2018 ◽  
Vol 233 (3) ◽  
pp. 675-685 ◽  
Author(s):  
Sheng Lin ◽  
Xi Kong ◽  
Chun Wang ◽  
Yun Zhai ◽  
Liang Yang
Keyword(s):  
Design Theory ◽  
Compliant Mechanism ◽  
Three Dimensional ◽  
Cutting Speed ◽  
Elliptical Vibration Cutting ◽  
Vibration Cutting ◽  
Elliptical Vibration ◽  
The Common ◽  
Constraint Topologies ◽  
The Relationship

Aiming at the issue of the lack of the design theory for the three-dimensional elliptical vibration cutting device, a compliant mechanism with two rotations and one translation is synthesized based on the theory of freedom and constraint topologies. And a three-dimensional elliptical vibration cutting device is proposed on the basis of the compliant mechanism. The relationship between the critical speed and the length of the tool bar is analyzed. Simulation is conducted to analyze the influence of parameters on the output ellipse. Experiments are conducted to verify the validity of the elliptical vibration cutting device. The relationship between the roughness and the cutting speed is obtained. Experiments with different driving frequencies are conducted without the change of other parameters. Results show that the proposed compliant mechanism is feasible for the elliptical vibration cutting device. Compared with the common cutting, the new elliptical vibration cutting device has a better performance in the processing effect. This provides an important reference for design of the elliptical vibration cutting device.

Development of Movement Crosstalk Removal Method for 3D Elliptical Vibration Cutting

2013 ◽  
Vol 331 ◽  
pp. 254-259
Author(s):  
Jie Qiong Lin ◽  
Jin Yue ◽  
Xiao Ping Gao ◽  
Tong Han Ran
Keyword(s):  
Control System ◽  
Least Squares Method ◽  
Low Cost ◽  
Three Dimensional ◽  
Surface Damage ◽  
Elliptical Vibration Cutting ◽  
Vibration Cutting ◽  
Elliptical Vibration ◽  
High Efficient ◽  
Control System Model

The three-dimensional elliptical vibration cutting can realize high efficient and low cost of method of optical free surface cutting, whose effective drive form is the stack of piezoelectric ceramics to achieve the vibration in three directions . but the crosstalk phenomenon generated in the process of the piezoelectric movement make the tool deviate the ideal trajectory so that seriously affect the quality of the workpiece surface, damage the tool. Thus a method of removing the crosstalk generated in the three-dimensional elliptical vibration cutting device and its control system is proposed in the paper. The control system model of a three-dimensional elliptical vibration cutting is established, then, the crosstalk data is assumed, using the least squares method to fit the date, crosstalk compensation algorithm is obtained so that the crosstalk removal module can be designed to remove the crosstalk generated the piezoelectric movement ,the final section is the simulation-based analysis, the simulation results show that the method can meet the control requirements of the three-dimensional elliptical vibration, the crosstalk of piezoelectric movement can be removed effectively.

Modeling and Analysis of Surface Topography in Elliptical Vibration Cutting

2014 ◽  
Vol 487 ◽  
pp. 479-483
Author(s):  
Jie Qiong Lin ◽  
Xian Jing ◽  
Tao Xu ◽  
Ming Ming Lu ◽  
Dan Jing
Keyword(s):  
Surface Topography ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Cutting Parameters ◽  
Elliptical Vibration Cutting ◽  
Modeling And Analysis ◽  
Vibration Cutting ◽  
Elliptical Vibration ◽  
Tool Edge ◽  
Selection Of

According to the surface formation mechanism of elliptical vibration cutting (EVC), EVC process and three dimensional cutting surfaces are analyzed in this paper. The model of EVC surface topography is established based on curved surface remove function under the assumption that the tool edge is sharp enough. Simulation analysis of surface topography is conducted to verify the established model. The present research clarifies the law that cutting parameters influent on EVC surface topography. Whats more, it provides some references for optimizing the selection of EVC cutting parameters and further improving EVC surface quality.

scholarly journals Chatter Identification of Three-Dimensional Elliptical vibration Cutting Process Based on Empirical Mode Decomposition and Feature Extraction

2018 ◽  
Vol 9 (1) ◽  
pp. 21 ◽  
Author(s):  
Mingming Lu ◽  
Bin Chen ◽  
Dongpo Zhao ◽  
Jiakang Zhou ◽  
Jieqiong Lin ◽  
...  
Keyword(s):  
Feature Extraction ◽  
Empirical Mode Decomposition ◽  
Three Dimensional ◽  
Vibration Signals ◽  
Elliptical Vibration Cutting ◽  
Vibration Cutting ◽  
Chatter Identification ◽  
Elliptical Vibration ◽  
Mode Decomposition ◽  
The Mean

Three-dimensional elliptical vibration cutting (3D-EVC) is one of the machining methods with the most potential in ultra-precision machining; its unique characteristics of intermittent cutting, friction reversal, and ease of chip removal can improve the machinability of materials in the cutting processes. However, there is still not much research about the chattering phenomenon in the 3D-EVC process. Therefore, based on the empirical mode decomposition (EMD) technique and feature extraction, a chatter identification method for 3D-EVC is proposed. In 3D-EVC operations, the vibration signal is collected by the displacement sensors and converted to frequency domain signal by fast Fourier transform (FFT). To identify tool cutting state using the vibration frequency signal, the vibration signals are decomposed using empirical mode decomposition (EMD), a series of intrinsic mode functions (IMFs), so the instantaneous frequency can be reflected by the vibration signals at any point. Then, selecting the primary IMFs which contain rich chatter information as the object in feature extraction identification, and two identification indexes, that is, the mean square frequency and self-correlation coefficient, are calculated for the primary IMFs by MATLAB software, to judge the chatter phenomenon. The experimental results showed that the mean square frequency and self-correlation coefficient of the three cutting states increase with the increase in the instability of the cutting state. The effectiveness of the improved chatter recognition method in 3D-EVC machining is verified.

scholarly journals Study on the tool wear of 3-D elliptical vibration cutting

2017 ◽  
Vol 8 (2) ◽  
pp. 215-220 ◽  
Author(s):  
Jieqiong Lin ◽  
Xian Jing ◽  
Mingming Lu ◽  
Yan Gu ◽  
Jinguo Han
Keyword(s):  
Tool Wear ◽  
Prediction Model ◽  
Three Dimensional ◽  
Cutting Parameters ◽  
Key Factors ◽  
Elliptical Vibration Cutting ◽  
Vibration Cutting ◽  
Elliptical Vibration ◽  
Proposed Model ◽  
Intermittent Cutting

Abstract. As always, the rapid wear of tools was one of the key factors limiting the precise turning of difficult-to-machine materials with diamond tool. 3-D elliptical vibration cutting has inherited many advantages of elliptical vibration cutting, such as the intermittent cutting property and friction reverse property. However, studies on the tool wear of three-dimensional elliptical vibration cutting has not been reported yet. The formation principle of 3-D cutting elliptical trajectory was analysed and a prediction model of tool wear was established in the present work. Besides, a self-developed three-dimensional elliptical vibration device was employed to conduct turning experiment. Compared with the proposed model, the experimental results showed a great agreement with the proposed prediction model. This work may provide a reference for the further optimization of the 3-D elliptical vibration cutting parameters.

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