| TANG Jun,CHEN Xiao-jing,ZHAO Bo.Study on the Ultrasonic Milling Aviation Aluminum Alloy with Micro Texture Cutter[J],50(5):356-363 |
| Study on the Ultrasonic Milling Aviation Aluminum Alloy with Micro Texture Cutter |
| Received:April 25, 2020 Revised:July 24, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2021.05.040 |
| KeyWord:micro-texture cutting tool longitudinal-torsional compound ultrasound milling surface roughness microhardness residual stress |
| Author | Institution |
| TANG Jun |
Xinxiang University, Xinxiang , China |
| CHEN Xiao-jing |
Xinxiang University, Xinxiang , China |
| ZHAO Bo |
Henan Polytechnic University, Jiaozuo , China |
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| Abstract: |
| In order to improve the working performance of 7075 aviation aluminum alloy, the micro-texture ultrasonic tool milling process is proposed by combining micro-texture tool and longitudinal-torsional composite ultrasonic milling. The cutting experiments of 7075-T6 aluminum alloy was carried out by micro-texture tool milling and the micro-texture longitudinal- torsional compound ultrasonic milling. The effect of the cutting parameters, such as spindle speed, feed per tooth and milling depth, on the surface roughness, residual stress, microhardness and surface texture of the workpiece was analyzed. The results showed that under the same cutting parameters, the surface roughness of workpiece obtained by microtexture ultrasonic milling was reduced by 4.7%~13.2%, the microhardness is increased 1.13%~2.35%, and the surface maximum residual stress was stabilized at –10.84 MPa. And the “fish scale reticulation” texture was formed on the surface of the machined workpiece. In addition, the workpiece roughness was negatively correlated with spindle speed, and positively correlated with milling depth and feed per tooth. With the increase of spindle speed and feed per tooth, the surface micro-hardness and residual stress of workpiece increased gradually. The effect of milling depth on micro-hardness and residual stress of workpiece was not significant. Finally, compared with micro-texture tool milling, the micro texture longitudinal-torsional compound ultrasonic milling can effectively improve the integrity of workpiece surface. |
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