| GONG Jun-zhen,MA Yong-tao,WU Zheng-xie,AN Le-le.Test of Surface Residual Stress Distribution in Al6061 after Fine Milling[J],47(4):281-285 |
| Test of Surface Residual Stress Distribution in Al6061 after Fine Milling |
| Received:December 09, 2017 Revised:April 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.04.041 |
| KeyWord:Al6061 milling finishing residual stress peak value distribution conditions process parameters |
| Author | Institution |
| GONG Jun-zhen |
School of Mechanical Engineering, Zhengzhou University, Zhengzhou , China |
| MA Yong-tao |
School of Mechanical Engineering, Zhengzhou University, Zhengzhou , China |
| WU Zheng-xie |
School of Mechanical Engineering, Zhengzhou University, Zhengzhou , China |
| AN Le-le |
School of Mechanical Engineering, Zhengzhou University, Zhengzhou , China |
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| Abstract: |
| The work aims to extend fatigue life of parts by exploring effects of milling finishing process parameters on Al6061 surface residual stress of Al6061 workpiece. With only one parameter changed while other parameters unchanged, the distribution of surface residual stress on Al6061 workpiece receiving milling finishing was studied. The surface residual stress was mainly compressive stress in the directions parallel to milling feed direction (x direction) and perpendicular to milling feed direction (y direction). As spindle speed increased, surface residual compressive stress decreased, and the maximum depth of residual stress increased. As feed per tooth changed, the surface residual compressive stress of workpiece decreased as feed per tooth increase, and the maximum residual stress appeared on the surface. With the increase of milling depth, the surface residual compressive stress decreased, the maximum residual stress was slightly affected. With the increase of milling width, the surface residual compressive stress first decreased and then increased, the maximum residual stress moved from the surface to deep layer. Provided with spindle speed of 10 000 r/min, feed per tooth of 0.015 mm, milling depth of 0.5 mm and milling width of 11.8 mm, the surface residual stress was affected profoundly, depth of affected layer was about 245 μm, the maximum compressive residual stress was 147.67 MPa, and peak depth was about 80 μm. In case of Al6061 finish milling, in order to obtain higher surface residual compressive stress, lower spindle speed, feed per tooth, milling depth and milling width shall be selected. In the direction of cutting depth, in order to obtain higher surface residual compressive stress, higher spindle speed and milling width, lower feed per tooth and appropriate milling depth shall be selected. |
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