| LI Feng,LI Yong-quan,LI Wen-ke,ZHANG Wei,CHEN Chong.Effect of Tool Path Mode on Milled Surface Quality of TC11 Thin-walled Parts[J],46(7):250-254 |
| Effect of Tool Path Mode on Milled Surface Quality of TC11 Thin-walled Parts |
| Received:January 18, 2017 Revised:July 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.07.041 |
| KeyWord:titanium alloy tool path mode surface roughness surface residual stress surface microhardness |
| Author | Institution |
| LI Feng |
Xi'an Aviation College, Xi'an , China |
| LI Yong-quan |
Beifang University of Nationalities, Yinchuan , China |
| LI Wen-ke |
Xi'an Aero Engine Group Ltd., Xi'an , China |
| ZHANG Wei |
Xi'an Aviation College, Xi'an , China |
| CHEN Chong |
Xi'an Aviation College, Xi'an , China |
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| Abstract: |
| The work aims to study law of influence of tool path mode on surface quality of TC11 thin wall parts during milling. Milling test was performed to TC11 thin-walled parts in the method of single-factor test. The law of influence of tool path mode on surface roughness, surface residual stress, surface microhardness of TC11 thin-wall parts was obtained. The surface roughness of TC11 thin-walled parts milled in HU (Horizontal Upward) tool path mode was 0.46 μm, and in VU(Vertical Upward) tool path mode 0.74 μm. Surface residual stress of TC11 thin-walled parts milled in either HU or VU mode was compressive stress, and the surface residual stress of parts milled in VU mode was higher than that in HU tool path mode. In addition, the residual stress of parts milled in both modes decreased with the increase of cutting depth. The depth of layer affected by residual stress in HU mode was 65 μm, and in VU 43 μm. Lastly, surface microhardness of the parts milled in both tool path modes first softened and then hardened, and was finally close to substrate hardness. Hardening level of workpieces milled in VU mode was worse than that in HU mode. Laws of influence of tool path mode on surface characteristics of TC11 thin-walled workpieces vary a lot. For machined surface roughness, milling in HU mode leads to better surface roughness; for machined surface residual stress, properties of residual stress obtained in both tool path modes are the same, but the values are different. Moreover, with the increase of machining depth, change rule of residual stress in both tool path modes is the same, but the maximum influence depth differs from each other. For microhardness of milled surface milled in both tool path modes, the influence law is consistent, but the hardening degree of workpieces is different. |
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