Diesel motor aluminium alloy cylinder metal mould low-pressure casting method

A technology of diesel engine and low pressure casting, which is applied in the field of metal mold low pressure casting for casting aluminum alloy cylinder blocks of diesel engines, can solve the problems that mechanical properties cannot meet the design requirements, the combination of cylinder liner is not compact, and the waste sand is generated too much. Process yield, simple manufacturing operation, and energy-saving effects

Active Publication Date: 2009-08-05
SHANGHAI AISHIDA AUTOMOTIVE COMPONENTS
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Problems solved by technology

However, for the diesel engine cylinder block that needs to be cast into the cylinder liner for closed water cooling, there are problems such as m

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  • Diesel motor aluminium alloy cylinder metal mould low-pressure casting method
  • Diesel motor aluminium alloy cylinder metal mould low-pressure casting method
  • Diesel motor aluminium alloy cylinder metal mould low-pressure casting method

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Embodiment Construction

[0034] The metal mold low-pressure casting method for an aluminum alloy cylinder block of a diesel engine disclosed by the invention adopts a metal casting mold and a low-pressure all-metal mold casting method for casting, and includes the steps of low-pressure casting, vibrating sand, rough machining and heat treatment,

[0035] see Figures 3 to 11 , in the low-pressure casting step, the water jacket and the oil passage are respectively cast with the oil passage sand core 11 and the water jacket sand core, and the cylinder liner is cast in an inlaid manner; the entire casting 1 adopts the cylinder surface on the bottom and the crankshaft surface on the top. First, the aluminum is melted, so that the molten aluminum is deteriorated and degassed, and then the water jacket sand core (not shown in the figure) and the oil channel sand core 11 are produced, see Figure 9 and Figure 10 The oil channel sand core 11 includes a large core head 12 and a sand core 6 formed on the larg...

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Abstract

The invention relates to a method for metal mold low-pressure casting of an aluminum alloy cylinder body of a diesel engine, which adopts a metal casting die and a low-pressure full metal mold casting method to cast the aluminum alloy cylinder body and comprises the steps of low-pressure pouring, sand vibration, primary processing and heat treatment, wherein in the step of low-pressure pouring, a water jacket and an oil duct are cast by adopting an oil duct sand core and a water jacket core respectively, and a cylinder sleeve is cast in an embedding mode; and the whole cast adopts a mode that the surface of a cylinder barrel is on the upside while the surface of a crankshaft is on the downside, an aluminum liquid is introduced from the cylinder barrel, and the temperature for casting the aluminum liquid is between 670 and 690 DEG C. The method combines the advantages of pressure casting and gravity casting, and adopts a low-pressure casting technique so that a cylinder body cast reaches the requirement of high mechanical property of the diesel engine, and simultaneously ensures high technical production rate, saves energy source, and has simple and convenient casting process.

Description

Technical field: [0001] The invention belongs to the technical field of casting, in particular to a metal mold low-pressure casting method for casting an aluminum alloy cylinder block of a diesel engine. Background technique: [0002] At present, the cylinder block is recognized as a cutting-edge technology in the domestic foundry industry, and the aluminum alloy diesel engine is one of its main representative parts. The complex structure, large wall thickness difference, cast iron cylinder liner and closed water jacket structure lead to This product is still unable to produce cast aluminum cylinder blocks that meet the performance requirements in China, and defects such as pores and shrinkage are very easy to occur during production. Since the cylinder block is one of the key parts of the diesel engine, and the aluminum alloy diesel engine is one of the important symbols of the lightweight of the automobile engine, the quality directly affects the overall performance and se...

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Application Information

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IPC IPC(8): B22D18/04B22C9/24B22C9/10
Inventor 俞启荣王建伟
Owner SHANGHAI AISHIDA AUTOMOTIVE COMPONENTS
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