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Feeding bag suitable for low-pressure casting of aluminum alloy thick large part

A technology of low-pressure casting and feeding bag, which is applied to the field of low-pressure casting of aluminum alloy thick and large parts, and can solve problems such as excessive porosity defects, shrinkage hole defects, and the vertical cylinder cannot be fed.

Inactive Publication Date: 2019-08-13
SHANGHAI SPACE PRECISION MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For aluminum alloy castings with thick and large wall thickness, when the thick part is far away from the vertical cylinder, the vertical cylinder cannot have a feeding effect on it, and it is not suitable to install a vertical cylinder here, it is easy to produce Excessive porosity defects, and shrinkage defects may occur in severe cases

Method used

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  • Feeding bag suitable for low-pressure casting of aluminum alloy thick large part
  • Feeding bag suitable for low-pressure casting of aluminum alloy thick large part
  • Feeding bag suitable for low-pressure casting of aluminum alloy thick large part

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Embodiment 1

[0032] This embodiment provides a method for designing a feeding package for low-pressure casting of aluminum alloy thick and large castings. figure 1 It is a flow chart of casting gating system design provided by the embodiment of the present invention, combined below figure 1 Detailed description.

[0033] In step S1, the feeding bag and the casting are directly connected through subsidies, so that the temperature field in the feeding bag is much higher than that of the fed part, so that the thick part can be fully fed and the porosity defect is reduced;

[0034] Step S2, reasonably designing the feeding package;

[0035] Step S3, the feeding bag is connected to the riser through a sprue.

[0036] In the step S1, the feeding package is directly connected to the casting through a subsidy.

[0037] In the step S2, the packed package is determined according to the size of the part to be packed.

[0038] In the step S3, the size of the sprue is determined according to the th...

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Abstract

The invention provides a feeding bag suitable for low-pressure casting of an aluminum alloy thick large part. The feeding bag is connected with a casting through feeding, and the diameter and the thickness of the feeding bag are determined according to the thickness and the diameter of the position to be fed. The feeding bag suitable for low-pressure casting of aluminum alloy thick large part is directly connected with the casting through feeding, so that the temperature field in a pouring channel is higher than the position to be fed, feeding is realized, meanwhile, a heat joint is moved outwards, and defects are moved into the feeding bag.

Description

technical field [0001] The invention relates to the field of casting technology, in particular to a feeding bag suitable for low-pressure casting of thick and large aluminum alloys. Background technique [0002] Aluminum alloy thick and large parts are a common casting, which are widely used in aerospace, ships, automobiles and other industrial fields. With the development of modern casting technology, lightweight, high-precision, high-complexity aluminum alloy castings method has become a research hotspot. [0003] Porosity is the main defect that is prone to appear in the production process of aluminum alloy castings, and it is one of the main reasons that restrict the pass rate of castings, especially for some important parts that do not allow repair welding. Once the defects exceed the standard, the castings will be scrapped. [0004] Aluminum alloy thick and large castings are often used in the low-pressure casting system of vertical tube and slotted runner. The conven...

Claims

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Application Information

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IPC IPC(8): B22D18/04
CPCB22D18/04
Inventor 刘颖卓张娜崔恩强余国康陈俊杰孙浩邹文兵
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST
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