Y-type joint pouring technology

A process and gate technology, applied in the field of Y-joint pouring process, can solve the problems of cracks, easy generation of pores and overheated sand, sand sticking, etc., to achieve uniform spraying, avoid bad results, and uniform and rapid heat dissipation.

Inactive Publication Date: 2018-04-03
QINGDAO HONGXINTIAN MACHINERY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0023] refer to Figure 1-2 , a Y-joint pouring process, comprising the following steps:

[0024] S1: According to the structure of the casting, set the feeding gate and riser at the main hot spot of the casting, so as to facilitate continuous locking during the cooling process;

[0025] S2: Vertical pouring is adopted, and the pressure formed by the self-weight of molten steel is used to ensure sufficient feeding capacity for the first cooling part;

[0026] S3: pouring is carried out in the order of cooling first for thin walls, replenishing for thicker walls, and replenishing cooling for risers at the end;

[0027] S4: Add an R angle to the bottom of the externa...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/22B22C9/08
CPCB22C9/22B22C9/08B22C9/088
Inventor 郭玉昌林洪坤柳林杰
Owner QINGDAO HONGXINTIAN MACHINERY CO LTD
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