A blade milling and polishing integrated molding method

Abstract

A blade milling and polishing integrated molding method, including the following steps: Step 1, clamp and fix the fan blade by a clamp and perform milling processing, after the milling processing is completed, use a measuring tool to measure the fan blade, and record the intake edge and exhaust The width of the out-of-tolerance area at the side; step 2, polish the fan blade according to the measurement results of step 1 and the structure of the fan blade; step 3, program compilation and polishing parameter selection, set the polishing step distance, and use motion simulation software to perform polishing trajectory Simulation; step 4, fix the fan blades with fixtures, and perform precise polishing on the whole area of ​​the fan blades by means of force control. By adjusting the order of polishing tools and abrasive grain sizes, the knife marks and vibration features on the surface of the fan blades can be effectively removed . Effectively improve the overall processing efficiency, reduce the overall processing cost, ensure the processing quality of the final fan blade, and improve the surface roughness level.

Description

technical field [0001] The invention belongs to the technical field of aero-engines, and in particular relates to an integrated molding method of blade milling and polishing. Background technique [0002] As one of the core components of an aero turbofan engine, the blade's dimensional accuracy and surface quality directly affect the starting performance and fatigue life of an aeroengine. The existing large-scale fan blade processing technology is to control the dimensional accuracy through CNC milling and improve the surface roughness through manual polishing. However, since the large fan blade is a thin-walled part with weak stiffness, it is inevitable that there will be tool clearance in the precision milling process, resulting in the fact that the actual processing size does not match the theoretical processing size. [0003] Now the general solution is to control the cutting force as small as possible in the finishing process, so as to reduce the machining deformation,...

AI Technical Summary

Problems solved by technology

However, this kind of processing method not only has a long test period, but also significantly increases the processing time in the later mass production processing; the existing milling processing program is corrected through simulation or actual processing results to shorten the processing time, but due to the actual processing process In the process, there are unstable factors such as tool wear, machine tool characteristics, chatter, etc., which greatly increase the difficulty of the application of this method, and it is easy to produce parts out of tolerance

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