Applications of Abrasive Belt Grinding Technology in Aircraft Engine

Turbines and compressors are the important parts of aircraft engine, which directly determine the working performance of aircraft engine, and the manufacturing level of turbines and compressors depends on the machining quality of aeroengine blades.

In recent years, the blades’ dimensional accuracy and surface quality after precision forging can’t meet the accuracy requirements of aircraft engine. Along with the progress of the technical level, the aeroengine blades manufacturing has begun using CNC abrasive belt grinding technology instead of traditional way of manual polishing. Using CNC abrasive belt grinding technology for polishing and processing the blade surface, not only improves the working conditions and the processing efficiency , greatly, and enhances the blade surface quality, product consistency and type surface accuracy markedly.

Experts on abrasive belt grinding design abrasive belt grinding machine seventh shaft that can make adaptive precision forging deviation for smooth blade surface without ripple effects. Thus it can achieve real-time control for grinding pressure to adapt to the size of the grinding allowance. What’s more,  the abrasive belt grinding contact wheel is made of elastic rubber wheel, and can have certain envelope function in the process of machining blade surface, better adaptive abrasive belt grinding for precision forging blade profile.

Based on structural characteristics and grinding process characteristics of the edge of aeroengine blades, experts put forward a method of pressure self-adaptive abrasive belt grinding, and establish the mathematical model between grinding pressure, removing allowance and grinding parameters.

Through technology experiment about aeroengine titanium alloy forging blade edge, the surface roughness is under 0.4 microns, and the contour satisfies the requirement of tolerance ±0.05mm after grinding. Machining precision satisfies the requirements of machining and the surface quality is good, which verify the superiority of abrasive belt grinding technology.