Flexible polishing mechanism for blade profile abrasive belt

Abstract

The invention discloses a flexible polishing mechanism for a blade profile abrasive belt. The flexible polishing mechanism is fixed on a numerical control machine through an installing frame. The flexible polishing mechanism drives a polishing wheel to act along the direction of a stationary shaft for controlling the polishing force; and a rolling wheel is arranged on a base plate for supporting the abrasive belt, a tensioning cylinder enables the abrasive belt to generate a pretightening force on the rolling wheel, a drive wheel drives the abrasive belt to rotate at high speed on the rolling wheel for controlling a cylinder in the flexible polishing mechanism so that the polishing wheel can make an axial displacement action, i.e. a cutter acts through flexibility in the polishing process, thus blade profile deformation and damage caused by rigid shock are avoided. The line deflection of the abrasive belt, generated in the polishing process, is regulated through a deviation correcting mechanism. The flexible polishing mechanism has the advantages of simple structure and convenience for operation, and realizes an automatic polishing process of the blade profile, thus the polishing quality of the blade profile is increased and the working efficiency is increased.

Description

technical field [0001] The invention relates to a flexible polishing mechanism, in particular to a flexible polishing mechanism for blade profile abrasive belts. The invention belongs to the technical field of mechanical design and manufacturing, and is suitable for the polishing process of the complex curved surface of the aero-engine blade. Background technique [0002] As the heart of the engine, the blade is affected by the requirements of large bypass ratio, high thrust-to-weight ratio and long life of the engine. The shape of the blade tends to be complex, and the geometric size gradually increases, which puts forward higher requirements for its key manufacturing technology. The surface of the engine blade is a typical complex curved surface with high degrees of freedom, and the requirements for surface quality and surface accuracy are very high. As the final process of blade forming, the polishing process plays an important and key role. [0003] Due to the complex a...

AI Technical Summary

Problems solved by technology

[0006] However, the abrasive belt polishing mechanism introduced in the above-mentioned patents and published documents can polish the surface of the blade, but it has only been studied from the feasibility of polishing the surface of the blade, and the polishing and shaping of the blade has been realized, but it cannot meet the qualitative requirements of the blade surface. It is impossible to adapt to the blade surface shape and surface corrugation. After polishing, the surface of the blade will produce chatter lines due to the influence of corrugation. The surface quality of the blade after polishing cannot fully meet the requirements.

At present, it is more common to use the manual polishing method to polish the blades. The work intensity is high and the quality is unstable, which will affect the performance of the blades.

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