Y-type joint pouring technology

Abstract

The invention discloses a Y-type joint pouring technology which is implemented by a primary pouring system and an auxiliary system, wherein the primary pouring system comprises a casting head, a feeding area, a feeding channel, a product wax pattern and a semi-closed space; a feeding sprue is formed in the top outer wall of the feeding area; the casting head is welded on the inner wall of the feeding sprue; the casting head and the feeding sprue are arranged at main hot spots of a casting by a step of arranging the feeding sprue and the casting head are the main hot spots of the casting according to the casting structure; continuous feeding is facilitated in a cooling process; through vertical pouring and under the pressure formed by the weight of molten steel, enough feeding ability is guaranteed for the part cooled earlier, based on a rule that thin walls are cooled earlier and the thick and big walls are supplemented. According to the technology disclosed by the invention, enough feeding ability is guaranteed for the part cooled earlier, thus, heat crack caused by stress concentration in molten steel cooling resulting from non-uniform wall thickness can be prevented, air holes and roughness caused by overheating as well as consequent adverse outcomes are avoided, and the requirements on the product performance are completely met.

Description

technical field [0001] The invention relates to the technical field of foundry industry, in particular to a Y-shaped joint pouring process. Background technique [0002] The weight of the casting is 61.4KG, the wall thickness is uneven, and the cooling of molten steel is inconsistent. To ensure the size, it is necessary to ensure that the casting cooling process realizes sequential cooling. Thick parts of castings tend to be loose, and the surface roughness of castings is strictly required, while the thick and large areas and inner holes of castings are overheated areas, which are prone to sand sticking. The castings require high hardness and no pore cracks are allowed. The large structure area, the two groove areas, and the inner pores are prone to cracks after quenching and tempering due to pores and porosity. The oblique through-holes connected by the two internal controls are completely located at the hot joints, which are prone to produce pores and overheated sand stick...

AI Technical Summary

Problems solved by technology

Thick parts of castings tend to be loose, and the surface roughness of castings is strictly required, while the thick and large areas and inner holes of castings are overheated areas, which are prone to sand sticking. The castings require high hardness and no pore cracks are allowed. The thick structure area, the two groove areas, and the inner holes are all prone to cracks after quenching and tempering due to pores and looseness. The oblique through holes connected by the two internal controls are completely located at the hot joints, and it is easy to generate pores and overheated sand sticking

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