Novel modeling method for casting large-sized and ultra large-sized alloy steel track shoes

Abstract

The invention provides a novel modeling method for casting large-sized and ultra large-sized alloy steel track shoes. The method comprises the following steps of: placing a model on a shaping plate with a gas extracting box; covering a heated plastic film on a model form and the shaping plate; attaching the plastic film to each part of the form and the shaping plate through vacuum suction force; brushing a high temperature resistant costing on the model form attached with the plastic film; placing a sand box mounted with a gas extracting device on a model plate; forming a casting head and a gas outlet in an upper casting sand box; filling dry quartz sand into the sand box; ramming the casting sand by using a vibration table; scraping the sand model; covering an upper sealing sand box of the sand model by using a plastic film; pumping loose sand in the sand box to negative pressure so that the sand model is hardened; pulling out the hardened sand model to obtain the model form; making upper and lower sand models; setting a core; and closing the box for casting. Compared with the traditional sand model, the novel modeling method for casting the large-sized and ultra large-sized alloy steel track shoes, provided by the invention, has the following advantages that: the working environment is largely improved, the size accuracy and surface roughness of the cast are improved, long service life of the mold is obtained, the consumption of the casting sand and auxiliary materials is saved, energy is saved and emission is reduced.

Description

technical field [0001] The invention relates to a metal casting process, in particular to a new molding method for casting large and super large alloy steel track shoes. Background technique [0002] Track shoes are key parts of construction machinery such as tanks and crawler cranes. In addition to requiring high comprehensive mechanical properties (such as tensile strength, yield strength, elongation, section reduction, hardness, etc.), they are also complex in structure. It bears extremely high loads and has extremely high requirements for geometric and dimensional tolerances. In the past, the casting and production of large and medium-sized track shoes has been using the traditional molding method—sand mold manual molding. The disadvantages are: the dust in the molding sand causes a poor working environment, the large consumption of molding sand produces a large amount of industrial waste, the service life of the mold is short, and the produced track shoe castings The s...

AI Technical Summary

Problems solved by technology

In the past, the casting and production of large and medium-sized track shoes has been using the traditional molding method—sand mold manual molding. The disadvantages are: the dust in the molding sand causes a poor working environment, the large consumption of molding sand produces a large amount of industrial waste, the service life of the mold is short, and the produced track shoe castings The surface quality and dimensional accuracy are low. In order to meet the requirements of drawings and technical conditions, a lot of manpower and material resources have to be spent to solve the above problems

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