Casting method of high-powered engine box casting

Abstract

The invention discloses a casting method of a high-powered engine box casting. The casting method comprises the steps of preparing moulding sand, performing modeling and core making to obtain a sand mould, preparing pouring iron liquid, taking pig iron, foundry returns and waste steel as raw materials to be fed into a smelting furnace to be smelted, carrying out in-package inoculation and spheroidization on the smelted iron liquid, carrying out stream inoculation before tapping, then carrying out tapping, pouring the iron liquid into the sand mould, carrying out stream inoculation, adopting acold iron riser process for feeding and temperature control, forming a casting after pouring is finished, and carrying out treatment on the formed casting. The obtained casting is good in quality, andquality problems of core clamping, shrinkage, cracks and the like are not prone to happening.

Description

Technical field [0001] The invention relates to the technical field of casting production of parts such as heavy-duty vehicles, large passenger cars, engineering machinery, etc., in particular to a casting method of high-horsepower engine box castings. Background technique [0002] In the "Catalogue of Major Technical Equipment and Products Supported by the State for Development" issued by the state, it is clearly pointed out that "high-power diesel engines and their key supporting equipment" are the key national support and priority development directions. At present, high-power diesel engines are widely used in various fields of modern industry, have a very wide range of applications and needs in my country's modern industry, and are also a major key equipment related to the development of my country's national economy. [0003] Among high-power diesel engines and their key ancillary equipment, the diesel chassis is the largest main component, and also the most important and crit...

AI Technical Summary

Problems solved by technology

For the casting of multi-cavity high-horsepower engine casings, the inner cavity structure is complex and requires a large number of cores, resulting in core positioning, sand inclusions, sandwich cores, sticky cores, and sticky cores during the casting process of high-horsepower engine boxes. At the same time, problems such as shrinkage, shrinkage porosity, and pores will also have a serious impact on the quality of castings, which will eventually lead to low casting pass rate and poor casting performance, and the difficulty of post-processing increases, and the processing quality is difficult to effectively guarantee.

In addition, in the subsequent processing of castings, oxygen melting rods or air shovels must be used for strong grinding, which will not only easily lead to a secondary decrease in the quality and performance of castings, but also increase the consumption of manpower and material resources and increase production costs.

Images