Precision grinding method for blade profile

Abstract

The invention provides a precision grinding method for a blade profile. The method comprises the following steps that a to-be-ground part of a blade basin of a blade is divided into two areas, namely a first area and a second area, by taking a first damping table as a partition, a to-be-ground part of a blade back of the blade is divided into two areas, namely a third area and a fourth area, and the first area and the third area are positioned at one end close to a blade tenon; and during grinding machining, the blade tenon is clamped and fixed through a clamp, one end of the blade tip of the blade is suspended, and the pressure adopted for grinding the first area and the third area is larger than that adopted for grinding the second area and the fourth area. According to the method, the grinding machining part is divided into different areas by the damping table as the partition, the area close to the blade tenon can be ground by adopting large pressure, the area close to one end of the blade tip can be ground by adopting small pressure, and therefore the problem that the area close to one end of the blade tip deforms due to suspended grinding can be avoided.

Description

technical field [0001] The invention belongs to the technical field of aero-engine parts processing, and relates to a precision grinding method for blade profiles. Background technique [0002] In the traditional machining process of compressor blades, the final precision polishing process is an indispensable process, which can effectively reduce surface roughness, brighten the appearance of parts and eliminate surface defects of parts. The blade is a thin-walled part with a long size and weak rigidity. Generally, the two ends need to be fixed for milling or grinding, and the over-positioning method is used to limit the degree of freedom to prevent the influence of processing deformation on the part. However, the blade tip of the part has been cut off during precision polishing, and it is impossible to perform precision polishing by fixing both ends. However, if one end of the blade is fixed, the profile is in a cantilever state during surface grinding, and it is difficult t...

AI Technical Summary

Problems solved by technology

However, the blade tip of the part has been cut off during precision polishing, and it is impossible to perform precision polishing by fixing both ends. However, if one end of the blade is fixed, the profile is in a cantilever state during surface grinding, and it is difficult to guarantee the surface quality of the blade due to the rigidity of the part.

Images