Experimental Study of Figuring and Polishing of Titanium Alloy Blades with Fixed Abrasive Tools
To improve the surface quality and profile accuracy of non-uniform allowance titanium alloy blades,a new method of integrating the figuring and polishing of titanium alloy blades was pro-posed based on fixed abrasive tool technology.The distribution of machining allowances of titanium alloy blades was obtained according to spatial relative position relationship among the theoretical traj-ectory points and the actual measurement points of processing blades.The principle of deterministic polishing was used to establish the quantitative removal model of blade surfaces.The figuring and pol-ishing of titanium alloy blade experiments were carried out on robot constant force polishing platform.Experimental results show that the average roughness of titanium blade basin decreases from 0.924μm to 0.225 μm,and the average roughness of blade back decreases from 0.984 μm to 0.249 μm.Both of which meet the processing requirements of less than 0.4 μm.The original pits and scratches on the blade surfaces are effectively removed.There are no obvious defects on the machined surfaces and the texture is dense and uniform.The profile errors of the polished blades are less than the allowed range of-0.05～0.05 mm for the blades.The feasibility of the figuring and polishing of titanium alloy blades with non-uniform allowance of the fixed abrasive tool is verified,which provides a reference ba-sis for the processing selection of figuring and polishing of aero-engine blades.
fixed abrasive tooltitanium alloy bladenon-uniform allowancefiguring and polis-hingsurface roughness
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