Manufacturing method of wear-resistance part for concrete pump suitable for large-batch automation production

Abstract

The invention discloses a manufacturing method of a wear-resistance part for a concrete pump suitable for large-batch automation production. The method comprises following steps that S1, a wear-resisting part body is manufactured, and a hard alloy block is prepared; S2, the wear-resisting part body and the hard alloy block are cleaned; S3, the hard alloy block is assembled in a hard alloy mountinggroove to be brazed and fixed; S4, after brazing, discharge annealing treatment is carried out; S5, an overlaying wear-resisting layer is formed on the wear-resisting part body; S6, annealing treatment is carried out after overlaying; S7, the surface of the hard alloy is subjected to grinding machining; and S8, subsequent finish machining and checkout are carried out. Continuous atmosphere protection brazing is adopted, oxidation of the wear-resisting part body and the hard alloy in the brazing process is avoided, overlaying after brazing is carried out, the problems that due to secondary heating of the overlaying wear-resisting layer, the structure property becomes bad, and the wear-resisting property is suddenly reduced are solved, the original structure and properties of an overlayinglayer are ensured, the protection effect of the overlaying wear-resisting layer on the body and the hard alloy is improved, product quality is improved, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of a method for manufacturing a wear-resistant part of a concrete pump, and in particular relates to a method for manufacturing a wear-resistant part for a concrete pump suitable for mass automatic production. Background technique [0002] Wear-resistant plate and wear-resistant ring are the wear-resistant parts of the concrete pump, and they are also the key vulnerable parts of the concrete pump. The wear-resistant plate is also called the spectacle plate. It is installed on the back wall of the hopper. The holes communicate with the two conveying cylinders respectively; the wear-resistant ring is also called the cutting ring, which is installed on the S valve and has an opening. During the pumping operation, the S valve swings, and one opening of the wear ring communicates with the two openings of the wear plate alternately. During the pumping process, the wear-resistant plate and the wear-resistant ring ...

AI Technical Summary

Problems solved by technology

The main problem of this process is that after surfacing welding, the deformation of the cemented carbide mounting groove is large, resulting in uneven alloy gaps, and the brazing stress of the entire ring of cemented carbide is large. The problem of false welding on the bottom surface is prone to occur when flame brazing is used, and the weld gap is too large. Large, low welding strength, prone to collapse during use; followed by secondary heating of the surfacing wear-resistant layer, the hardness and wear resistance of the surfacing wear-resistant layer decreased significantly, resulting in early wear of the surfacing wear-resistant layer, The body is hollowed out, and the alloy ring is exposed and then brittle and broken due to impact.

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