超声振动方向对TC4钛合金铣削特性的影响

doi:10.7527/S1000-6893.2019.23301

Abstract

Abstract: In order to give full play to the advantages of ultrasonic milling titanium alloy, improve the processing effects, and enhance the surface service performance, ultrasonic vibration is applied to the tools and workpieces to find suitable vibration directions and processing parameters. The critical speed of the side edge interrupted cutting is obtained from the theoretical derivation. The effects of different amplitudes and cutting speeds on surface topography, chip morphology, cutting force, and tool wear are investigated. The relationship between the surface microtexture and the friction characteristics is studied. Tests have shown that in both vibration directions, increasing the amplitude reduces the degree of serration of the chips, and increasing the axial amplitude allows the sawtooth chips to be converted into strip-shaped chips. When ultrasonic vibration is applied in the axial direction, the surface microtexture is more easily obtained, while the cutting force is reduced, the tool wear is weakened, and the running-in time of workpiece during friction is reduced. In addition, a method of measuring the ultrasonic vibration frequency under working conditions is proposed by using the spectrum analysis of the cutting force.

Key words: titanium alloy, ultrasonic milling, surface microtexture, chip morphology, tool wear, running-in time

CLC Number:

V461
TB559

ZHAO Bo, LI Pengtao, ZHANG Cunying, WANG Xiaobo. Effect of ultrasonic vibration direction on milling characteristics of TC4 titanium alloy[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(2): 623301-623301.

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Effect of ultrasonic vibration direction on milling characteristics of TC4 titanium alloy

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