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| Influence of vibration modes on surface integrity during ultrasonic vibration milling of titanium alloy |
| WU Min1,2,MA Lijie2,WANG Zhankui2,SU Jianxiu2 |
1.School of Xinke, Henan Institute of Science and Technology, Xinxiang 453000, China;
2.School of Mechanical and Electrical Engineering, Henan Institute of Science and Techology, Xinxiang 453000, China |
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Abstract Titanium alloys are widely used in the field of mechanical engineering, and their machined surface integrity plays an important role in the wear resistance, fatigue strength and service life of titanium alloy workpieces.In this paper, ultrasonic vibration side milling experiments of TC4 titanium alloy in different vibration directions were carried out by applying ultrasonic vibration to the titanium alloy workpieces.The kinematic characteristics of different vibration modes were analyzed, and the influence of cutting parameters and vibration modes on the surface integrity of titanium alloy was studied.The results show that the surface morphology deformation degree and surface roughness of normal vibration milling were greater than tangential vibration and axial vibration.The surface roughness of normal vibration milling and tangential vibration milling shows an upward trend, while that of axial vibration milling shows a downward trend with the increase of amplitude.The surface microhardness of normal vibration milling is greater than that of tangential vibration milling.Both axial and tangential vibration milling show a decreasing trend with the increase of the amplitude when the amplitude is larger than 3.5 μm.Surface residual stress in normal vibration milling is greater than that in axial vibration milling and tangential vibration milling, and residual stress in amplitude of 3.5 μm is greater than that in the amplitude of 5.4 μm.Compared with common milling, ultrasonic vibration milling can improve the microhardness and residual compressive stress of the machined surface, which plays an important role in improving the wear resistance and fatigue resistance of the workpieces.
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Received: 02 September 2019
Published: 28 February 2021
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