Pouring method and device of ultra-large complicated casting

Abstract

The invention relates to pouring method and device of an ultra-large complicated casting, wherein the casting method comprises the following steps of: arranging a plurality of pouring channels on a casting mould; arranging electrodes in the outlet and the pouring basin of each pouring channel, wherein the electrode is electrically connected with each servo circuit; when pouring molten iron, switching on the electrodes, and controlling an electromagnetic directional valve to be switched on by the servo circuits through the electrodes; controlling the action of a driving cylinder in each plug device by the electromagnetic directional valve, so that the pouring channels are sequentially opened by the plug devices, and the molten iron flows into each pouring channel; and obtaining the ultra-large complicated casting with excellent casting quality through the steps. The technical requirement and the working environment requirement of a K90MC-C diesel engine cylinder body produced by adopting the method and the device are satisfied, and meanwhile, casting defects do not exist on the assembled surface where the cylinder body is sealed with a cylinder sleeve thereof and a piston rod filler and on the assembled surface where the cylinder body is combined with parts, such as a cylinder cover and the like, thereby ensuring the good use performance of the cylinder body.

Description

technical field [0001] The invention relates to a pouring method and a device, in particular to a pouring method and a device suitable for pouring a cast iron cylinder block of a super large-bore diesel engine. Background technique [0002] As a super-large complex casting, the cast iron cylinder block of a super-large-bore diesel engine is one of the key components of a low-speed high-power marine diesel engine. Since the cylinder block is the core high-temperature and high-pressure part during the operation of the diesel engine, it bears the explosive impact force generated during the combustion process, and its mechanical performance requirements are relatively high. At the same time, the cylinder block is not allowed to have any tiny casting defects on the sealing assembly surface of the cylinder block, the piston rod stuffing box, and the assembly surface of the cylinder head and other components. However, due to the relatively thick wall thickness and heavy tonnage of...

AI Technical Summary

Problems solved by technology

However, due to the relatively thick wall thickness and heavy tonnage of the super-large-bore cylinder block, it is difficult to guarantee the mechanical performance requirements of the super-large-bore diesel engine cylinder block if the pouring scheme of the ordinary small and medium-bore diesel engine cylinder block is adopted.

Therefore, it is very difficult to produce the cast iron cylinder block of super large bore diesel engine

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