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| Parameters Optimization of Fine Milling Titanium Alloy TB6 Based on Combined Process of Milling, Polishing and Shot Peening |
| LUO Yang, ZHAO Peng, LI Xun |
| (School of Mechanical Engineering & Automation, Beihang University, Beijing 100191, China） |
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Abstract Titanium alloy TB6 is an important material in the field of aerospace manufacturing, and it is a typical
hard-to-process material. Experiments were conducted to optimize the milling parameter of combined processes of milling,
polishing and shot peening. The results indicated that surface roughness is mainly influenced by feed engagement (fz). When
fz < 0.2mm/z, the milling hardening is high and the surface roughness after shot peening was stable and correspondingly
low. When fz > 0.2mm/z, milling hardening declines and surface roughness after shot peening rises according to the rise of
fz. When linear velocity vs is between 20m/min and 40m/min, milling hardening declines and surface roughness after shot
peening rises according to the rise of vs. When vs is between 40m/min and 50m/min, milling hardening rises and surface
roughness after shot peening declines according to the rise of vs. The influence of cutting width ae on hardening and surface
roughness was not significant. The optimization results of milling parameters based on combined progresses of milling and
shot peening are vs=50m/min, fz =0.2mm/z, ae=1.0mm. After polishing is added, feed engagement (fz) could be improved
under 0.4mm/z.
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2017, 
