TsAGI obtains patent for method of manufacturing of gas-turbine engine blades through high-speed milling on NC machine tools
1 September 2016
The Central AeroHydrodynamic Institute named after Professor N.E. Zhukovsky (a part of the Scientific Research Center “Institute named after N.E. Zhukovsky”) has obtained a new patent. The team of authors developed a method of manufacturing gas-turbine engine (GTE) blades through the technology of high-speed milling on numerically controlled machine tools.
GTE rotor blades belong to the category of parts with relatively low thickness. During their manufacturing, the high-frequency cyclic effect of milling tool teeth cause the generation of vibrations disturbing the processing accuracy and quality. TsAGI specialists found a way to solve this problem. Improvement of the product-making process is possible due to increasing the blank material cutting speed more than 10 times. This is achieved by raising the rotation speed of the mill processing a part.
The invention is based on the calculation of natural frequencies of the blades with allowance and adjustment by the results of calculation of mill rotation speed in the software of NC machine tools. As a result, the amplitudes of resulting part vibrations don’t violate the requirements for accuracy and quality of processing.
The invention will be used at TsAGI during the making of aerodynamic models GTE compressor and turbine rotor blades, propeller blades, propfans, fans.
During the first half of 2016, TsAGI obtained more than 40 patents in various fields of activities.