Electrically-assisted Micro-forming Process of Gear Structure in TA15 Titanium Alloy

doi:10.3901/JME.2021.01.210

Abstract

Abstract: The processing technology of titanium alloy is a significant challenge in micro-manufacturing field owing to the worse plasticity under the room temperature, easily damaged die at high temperature and low controllability of the shape. For this purpose, the electrically-assisted micro-forming (EAMF) of micro-gears structure is conducted for TA15 titanium alloy. The effects of floating forming and diverging hole diameter on the forming load and flow behavior of micro-gears structure are simulated by finite element method. The results show that the floating forming reduces the forming load of the micro-gear and is beneficial to the filling of the bottom corners for tooth profile. The forming load and filling flow capacity are best when the diameter of diverging hole is 2.3-2.5 mm. The microstructure and formability analysis show that there are complete tooth profile, obvious metal flown line along contour, uniformly distributed mechanical properties of gear surface and almost unchanged equiaxed structure.

Key words: gear structure, electrically-assisted forming, inside divided flow, micro-forming, titanium alloy

CLC Number:

TG316

BAO Jianxing, XU Jie, QU Jiazheng, BAI Jianan, SHAN Debin, GUO Bin. Electrically-assisted Micro-forming Process of Gear Structure in TA15 Titanium Alloy[J]. Journal of Mechanical Engineering, 2021, 57(1): 210-216.

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