Machining method for guaranteeing shape completeness of air inlet and air outlet side circular arcs of blade

Abstract

The invention relates to a machining method for parts, in particular to a machining method for guaranteeing shape completeness of air inlet and air outlet side circular arcs of a blade. According to the technical scheme, a longitudinal numerical control milling mode is adopted for machining the profile of the blade, and the profile of the blade is divided into four machining regions which comprise an air inlet side circular arc region, an air outlet side circular arc region, a blade basin profile region and a blade back profile region; the two machining regions of the blade basin profile region and the blade back profile region are controlled through a numerical control program and machined in a normal tool path mode, and the two machining regions of the air inlet side circular arc region and the air outlet side circular arc region are controlled through a numerical control program and machined in an encrypted tool path mode. According to the machining method, through improving numerical control milling and polishing modes, on the premise that in the machining process of the profile of the blade, machining efficiency is not affected too much, an improvement on the machining quality of the air inlet and air outlet side circular arcs of the blade is guaranteed, and the qualified rate of the machined profile of the blade is increased.

Description

technical field [0001] The invention relates to a processing method of a part, in particular to a processing method for ensuring the integrity of the arc shape of the inlet and outlet sides of the blade. Background technique [0002] At present, the commonly used processing method for the processing of the compressor blade profile is to firstly use CNC milling to remove the allowance and ensure the accuracy of the profile, and then use manual polishing to remove the traces of the milling cutter and process to meet the surface roughness requirements. This processing method has the characteristics of simple operation, good processing flexibility, and high efficiency. However, due to the small diameter of the inlet and outlet arcs in the structure of some blade profiles, it is very easy to perform manual polishing according to common processing methods. Over-polishing occurs, resulting in incomplete circular arcs at the inlet and exhaust edges of the blade profile. For this re...

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Problems solved by technology

[0002] At present, the commonly used processing method for the processing of the compressor blade profile is to firstly use CNC milling to remove the allowance and ensure the accuracy of the profile, and then use manual polishing to remove the traces of the milling cutter and process to meet the surface roughness requirements. This processing method has the characteristics of simple operation, good processing flexibility, and high efficiency. However, due to the small diameter of the inlet and outlet arcs in the structure of some blade profiles, it is very easy to perform manual polishing according to common processing methods. Over-polishing occurs, resulting in incomplete arcs of the inlet and outlet edges of the blade profile

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