Aluminium front cover and manufacturing process thereof

Abstract

The invention discloses an engine aluminum alloy front cover and its manufacturing engineering, in which the chemical composition consists of (mass%): 7.8-8.2% silicon, 2.6-3.0% copper,0.25-0.35% magnesium,0.28-0.38% manganese and the other is aluminum. The manufacturing engineering includes: first preparing die for the front cover and water circulating channel core for inactivity; smelting the aluminum alloy raw material with a perfect allocation according to the said proportion in die-casting furnace and performing aftertreatment deaeration, metamorphic conditioning and temperature administration; when pouring, accurately placing water circulating channel core into front cover die cavity, then pouring the acceptable aluminum alloy liquor into pouring cup on the said die, performing gravity roll-over casting with metallic gravity casting machine to make the aluminum alloy liquor enter die cavity smoothly and steadily; after casting, obtaining the product by cold-setting, impact cleaning and central handling. The said aluminum alloy front cover is of smooth surface, dense internal organization, good air impermeability and fewer holes, which can effectively improve the engine service behavior.

Description

1. Technical field [0001] The invention relates to an aluminum alloy front cover for a gasoline engine and a manufacturing process thereof. 2. Background technology [0002] The front cover is the water cooling channel of the gasoline engine. It is directly installed on the front face of the engine cylinder block. The water pump hole of the cylinder block is directly connected with the water pump hole of the front cover. Its quality will directly affect the working temperature of the engine. affect the performance of the engine. At present, the aluminum alloy front cover of the gasoline engine is made of aluminum alloy 319 (US brand) material for sand casting (ie foundry casting process). This manufacturing process requires high equipment cost, and the aluminum alloy front cover produced has a rough surface, less dense internal structure, more pores, and poor airtightness of the water circulation channel. Add plugging glue to block the air holes, which is a big waste. Whe...

AI Technical Summary

Problems solved by technology

This manufacturing process requires high equipment cost, and the aluminum alloy front cover produced has a rough surface, less dense internal structure, more pores, and poor airtightness of the water circulation channel. Add plugging glue to block the pores, which is a lot of waste

When the engine is running, the water circulation channel of the front cover is prone to water leakage, causing the engine temperature to be too high

thereby negatively affecting the performance of the engine