Low pressure multiple-core casting technique of engine V6 aluminum cylinder

Abstract

The invention discloses a low-pressure core assembly casting technique for V6 aluminum cylinder-block of engines, which is used for casting V6 aluminum cylinder-block of automobile engines. The casting technique adopted combines a low-pressure casting method and a core assembly method; the three-dimensional modeling of products is firstly carried out; according to the shape of the cast product, a crankcase is determined to be downwards and the aluminum liquid is let in from the baffle of the crankcase during casting course; the position of the sprue is selected and the size of the sprue is determined; a casting simulation software is adopted to carry out a simulation casting, the defects that are possible to occur are analyzed and a technical design scheme is made according to the analytic result, which essentially comprises the steps of : 1) making cores; 2) combining sand cores into a sand core group (6); 3) casting under low pressure. The casting technique of the invention can adopt flexible core assembly modes according to different shapes of engine blocks to produce aluminum cylinder-block cast products which are complex and of fine quality and has thin wall, meanwhile, the casting technique is applicable to the mass production with automatic production lines, thus having the advantages of low cost, high efficiency and high qualification rate.

Description

technical field [0001] The invention relates to the technical field of metal casting, in particular to a low-pressure casting process using an aluminum-based alloy for a cylinder block of an automobile engine. Background technique [0002] The structure of the aluminum cylinder block of automobile engine is complex, the thickness of the wall is very different, and the casting is difficult; at present, most of the castings of the engine aluminum cylinder body in my country are high-pressure die-casting. Large; and for the aluminum cylinder block of the V6 engine, because of its particularly complex shape, there are multi-layer water cavities and oil cavities around it, so many cavity parts cannot be completed by core pulling, so high-pressure casting cannot be used. Another way of aluminum cylinder casting is to use sand casting. Due to the limitation of filling and feeding methods in sand casting, it is impossible to produce V6 aluminum cylinder castings with complex shapes a...

AI Technical Summary

Problems solved by technology

[0002] The structure of the aluminum cylinder block of automobile engine is complex, the thickness of the wall is very different, and the casting is difficult; at present, most of the castings of the engine aluminum cylinder body in my country are high-pressure die-casting. Large; and for the aluminum cylinder block of the engine V6, because of its particularly complex casting shape, there are multiple layers of water chambers and oil chambers around it, resulting in many cavity parts that cannot be completed by core pulling, so high-pressure casting cannot be used

Another way of aluminum cylinder casting is to use sand casting. Due to the limitation of filling and feeding methods in sand casting, it is impossible to produce V6 aluminum cylinder castings with complex shapes and high quality. So far, my country has not been able to produce them by itself. Engine V6 aluminum cylinder block with multi-layer water chamber and oil chamber

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