Spark plug hole precast process for casting engine aluminum alloy cylinder cover by gravity

A spark plug hole and gravity casting technology, which is applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., to achieve the effect of easy promotion, simple process, and improved wall thickness uniformity

Active Publication Date: 2011-06-08
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the spark plug holes of foreign engine aluminum alloy cylinder heads are all manufactured by pre-casting process, but this manufacturing method is only applied to non-gravity casting processes such as low-pressure casting

Method used

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  • Spark plug hole precast process for casting engine aluminum alloy cylinder cover by gravity
  • Spark plug hole precast process for casting engine aluminum alloy cylinder cover by gravity
  • Spark plug hole precast process for casting engine aluminum alloy cylinder cover by gravity

Examples

Experimental program
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Effect test

Embodiment Construction

[0019] Put the cylinder head water jacket sand core and air passage sand core into the metal mold in the normal order, and then position the riser sand core and the low pressure oil passage sand core through the concave and convex positioning points and then position them on the gantry frame of the front and rear end molds . Then lower the sand core of the spark plug hole into the metal mold, close the mold and pour, solidify and take out. According to the structural characteristics of the product, the riser core and the spark plug hole sand core can also be made into an integral sand core, and the riser core can be positioned and lowered into the metal mold.

[0020] like figure 1 As shown, the spark plug hole sand core adopts the overall structure of the coated sand shell core or cold box technology, and the spark plug hole sand core is positioned through the core head part 1 .

[0021] like figure 2 As shown, the riser core 2 has a mating surface for the positioning of ...

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Abstract

The invention relates to a spark plug hole precast process for casting an engine aluminum alloy cylinder cover by gravity, which can be effectively applied to spark plug hole precast processing for casting the engine aluminum alloy cylinder cover by the gravity. The invention adopts the technical scheme that: a water jacket sand core, an air way sand core, a riser sand core and a low-pressure oilway sand core of the cylinder cover are respectively loaded in a metal mould. The precast process is characterized in that a spark plug hole sand core is also arranged and loaded in the metal mould; then the mould is closed and poured; and after solidification, an obtained workpiece is taken out.

Description

technical field [0001] The invention relates to a process for precasting a spark plug hole of an aluminum alloy cylinder head of a gravity casting engine. Background technique [0002] At present, the spark plug holes of foreign engine aluminum alloy cylinder heads are all manufactured by pre-casting process, but this manufacturing method is only applied to non-gravity casting processes such as low-pressure casting. [0003] The domestic aluminum alloy cylinder head adopts the gravity casting process, but the spark plug holes are all "solid" and not pre-cast. The thick and large structure of the casting will cause the inevitable thermal junction in the casting process, which will easily lead to casting defects such as shrinkage cavity, shrinkage porosity, pores, grain boundary cracks, etc., and cannot guarantee the sequential solidification of the casting, and the grain boundary Cracks are likely to cause product failure phenomena, such as oil-water mixing in castings. Co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/24
Inventor 田身军张炳荣徐帅项大伟
Owner CHERY AUTOMOBILE CO LTD
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