Method for eliminating looseness of joint R part between blade body and edge plate of large joint blade

Abstract

The invention discloses a method for eliminating looseness of a joint R part between a blade body and an edge plate of a large joint blade. The method for eliminating looseness of the joint R part between the blade body and the edge plate of the large-scale combined blade is characterized by comprising the following specific steps of (1) preparation of the iron-ball coating, wherein mixing the aluminum-vanadium soil powder with the viscosity of 10*10<-6>m<2> the silica sol is mixed into a porridge-like coating, the mass ratio of the aluminum-vanadium-soil powder to the silica sol is 6:1, adding the iron shots with the diameter of 1 mm into the coating, and uniformly mixing to form the iron-shot coating for later use, the ratio of the coating to the iron shots is 1:1; the method for eliminating looseness of the joint R between the blade body and the edge plate of the large joint blade, and the loose defect of the connecting R part between the blade body and the edge plate of the super-large connecting body is eliminated. Eight blades are poured in a test, no loose defect exists at the joint R of the leaf body and the edge plate through visual and fluorescent detection, and the created value is about 470 thousand RMB. The method for eliminating looseness can be applied to blade research and development production of similar structures, and economic benefits can be considerable.

Description

technical field [0001] The invention relates to the technical field of structural design and application of shell casting, and in particular provides a method for eliminating looseness at the transition R portion of a large conjoined blade body and edge plate. Background technique [0002] Large conjoined blades, the blade body is short (180mm), the edge plate size is large (the longest dimension is 500mm), the chord width is large (up to 300mm), the two blades overlap a lot, the wall thickness difference between the edge plate and the blade body is large, and the wall thickness is 4.5 -6.5mm, the maximum thickness at the transfer point R is 10mm, the dimensional accuracy and roughness requirements are high, and the inner surface of the blade body and the edge plate is cast without allowance. During the development process of the blade, there are loose defects at the junction R between the blade body and the edge plate. The serious ones can be seen visually, and the lighter ...

AI Technical Summary

Problems solved by technology

During the development process of the blade, there are loose defects at the junction R between the blade body and the edge plate. The serious ones can be seen visually, and the lighter ones can be found in the fluorescent penetrant inspection. Due to the large size of the blade, the development and production cycle is long, and the main and auxiliary materials It consumes a lot of labor and equipment, and the working environment of the guide vane is harsh, bearing high load, high temperature, and high corrosion. The joint R between the blade body and the edge plate bears the greatest force. Cracks will occur in the middle, affecting the service life of the overall engine, and there are serious quality risks

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