A casting method for the upper frame of a mine crusher

Abstract

The invention relates to a mine-crusher upper frame casting method. A crusher upper frame casting is divided into an upper portion and a lower portion according to the structure characteristic of the casting, wherein the casting upper portion is of a ring structure with the two ends provided with flanges, a scraper core assembly mode is adopted by the casting upper portion for modeling, and the top of the casting upper portion is provided with a ring riser; the casting lower portion is of a cross beam structure, real sample modeling is adopted by the casting lower portion, and the central portion of the casting lower portion is provided with a blind riser; the casting is poured through a method of combining bottom pouring and stepped nozzle pouring, the casting process is accurately simulated through casting simulating software MAGMA, and a final scheme is determined; and molten steel for pouring is subjected to treatment in an electric furnace and LF refining, vacuum treatment is conducted, and then most gas and non-metallic inclusions in the molten steel are removed. According to the mine-crusher upper frame casting method, microscopic casting defects such ad internal shrinkage of a frame can be reduced, the quality of casting products can be improved, on-machine service life of the casting can be prolonged, and domestication of castings for imported crusher equipment is achieved.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a casting method for an upper frame of a mine crusher. Background technique [0002] H8800 crusher is the most advanced crusher in the H series produced in Sweden. Its advantages are high production capacity, high efficiency, uniform product size, high degree of digital operation program control, high protection performance, and fully automatic operation. At present, the maintenance of the H8800 cone crusher used by domestic enterprises basically uses imported spare parts, which not only consumes a lot of money, but also takes a long time to supply, which seriously restricts the production and development of the enterprise. Therefore, it is urgent to solve the problem of localization of the crusher spare parts. [0003] The upper frame is an extremely critical part of the mine crusher equipment. It is a casting. Due to its complex structure, cracks are prone to appear in the rou...

AI Technical Summary

Problems solved by technology

At present, the maintenance of the H8800 cone crusher used by domestic enterprises basically uses imported spare parts, which not only consumes a lot of money, but also takes a long time to supply, which seriously restricts the production and development of the enterprise. Therefore, it is urgent to solve the localization of the spare parts of the crusher.

[0003] The upper frame is an extremely critical part of the mine crusher equipment. It is a casting. Due to its complex structure, cracks are prone to appear in the rounded corner of the flange after casting. After dissecting and analyzing the crystal phase, it is found that there are microscopic shrinkage defects inside. This defect led to the final scrapping of the casting; in response to the existing problem, we carried out technical research and improved the casting process of the upper frame

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