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Method for preparing aluminum alloy engine cylinder cover by using tilted pouring process

An engine cylinder head, aluminum alloy technology, applied in metal processing equipment, manufacturing tools, casting and molding equipment, etc., can solve the problems of high scrap rate and low process yield, solve shrinkage porosity problem, improve sequential solidification, avoid Effects of entrainment and loss of energy

Inactive Publication Date: 2020-04-28
CHINA FIRST AUTOMOBILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problems of high scrap rate and low process yield in the prior art, and provide a method for preparing aluminum alloy engine cylinder head by tilting casting process

Method used

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  • Method for preparing aluminum alloy engine cylinder cover by using tilted pouring process
  • Method for preparing aluminum alloy engine cylinder cover by using tilted pouring process
  • Method for preparing aluminum alloy engine cylinder cover by using tilted pouring process

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Embodiment Construction

[0032] Since the aluminum alloy engine cylinder head is a thin-walled complex part, with many sand cores and high dimensional accuracy requirements, gravity casting can only be used. The traditional top casting, bottom casting and middle casting cannot meet the casting requirements of this cylinder head. Therefore, only the tilting pouring belongs to the category of gravity casting pouring can be studied and applied to this cylinder head to achieve the development purpose and quality requirements.

[0033] The pouring process of the original aluminum alloy cylinder head, refer to figure 1 , in the figure:

[0034] The aluminum water flows in from the sprue cup 1, flows into the riser A4 and the cylinder head cavity A5 through the sprue 2 and the ingate A3, and the aluminum water in the cylinder head cavity A5 forms an aluminum alloy engine cylinder head, and the riser A4 The aluminum water in the cylinder head cavity A5 feeds the aluminum water.

[0035] The tilting pouring ...

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Abstract

The invention belongs to the technical field of aluminum alloy gravity casting, and relates to a method for preparing an aluminum alloy engine cylinder cover by using a tilted pouring process. As thealuminum alloy engine cylinder cover is prepared by using the tilted pouring process, during pouring, a mold is tilted by 100 degrees, molten aluminum flows into a pouring basin 6, the mold is tiltedfrom 100 degrees to 0 degree, the molten aluminum flows into a cylinder cover cavity B 8 from a gas inlet side inner runner B 7 under the action of gravity, when the mold is tilted to 0 degree, namelythe mold is horizontal, the molten aluminum fills the cylinder cover cavity B 8, and finally continuously fills a riser B 9, then the aluminum alloy engine cylinder cover is formed, wherein the weight of the mold riser selected by the tilted pouring process is 9215 grams, the adopted casting time is 13 seconds, the solidification time is 180 seconds to 190 seconds, and the temperature of coolingwater is 30 DEG C. According to the method, the tilted pouring process is applied to the aluminum alloy engine cylinder cover, winding of a molten aluminum punching molding path can be reduced, too many twists and turns are avoided, and gas entrapment, heat dissipation and pressure loss are avoided; and problems about shrinkage porosity and exhaust side cold shuts are effectively solved, and the leakage test qualification rate is improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy gravity casting, and relates to a method for preparing an aluminum alloy engine cylinder head by a tilting casting process. Background technique [0002] Aluminum alloy engine cylinder head is one of the important castings on automobile engines. From the structural point of view, it is a typical thin-walled complex part with many sand cores and high dimensional accuracy. The water channels, oil channels and air channels of the cylinder head need to pass through the air Leakage is not allowed during the tightness test, and the cylinder head must not have defects such as shrinkage porosity, air holes and cold shuts. The existing pneumatic ladle top-casting casting process will have a large risk of turbulent flow during the pouring process, and at the same time, there will be an uneven temperature field during solidification, which leads to shrinkage porosity and cold spots in the aluminum all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/08B22C9/08
CPCB22C9/082B22D27/08
Inventor 张欢郑丽明杨晓晨
Owner CHINA FIRST AUTOMOBILE
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