Machining method of pump body of internal combustion engine oil pump

Abstract

The invention discloses a machining method of a pump body of an internal combustion engine oil pump. The machining method comprises the following steps that a blank piece of the pump body of a castingmachine oil pump and a blank piece of a thrust plate are prepared; fine machining is carried out on the casted blank piece of the pump body of the oil pump, finish machining is carried out on the casted thrust plate, and the outer surface and the circumferential surface are polished smoothly; a connecting hole is machined on the pump body of the oil pump, an oil inlet hole and an oil outlet holeare machined, hole drilling is carried out on a protruding block of the outer circumference of the pump body of the oil pump through a drill bit, and the protruding block is used for machining oil inlet and oil outlet; holes are drilled towards the round inner wall with an opening from the opening of the pump body of the oil pump, two inclined holes are drilled correspondingly, so that the oil inlet and the oil outlet can correspondingly communicate with the opening of the pump body of the oil pump through the two inclined holes; and cleaning and oil removal as well as drying are carried out on the machined pump body of the oil pump and the machined thrust plate. According to the method, the machining is facilitated, the machining difficulty is reduced; and meanwhile, the cost is also saved.

Description

technical field [0001] The invention relates to an internal combustion engine oil pump, in particular to a processing method for a pump body of an internal combustion engine oil pump. Background technique [0002] Oil pumps are widely used in internal combustion engines, especially diesel engines. Most of the existing oil pumps are composed of an oil pump body, an oil pump cover, an inner rotor assembly and an outer rotor. The oil pump body and the oil pump cover are two discs. Shaped structure, the connection between the oil pump body and the oil pump cover is through lamination between two disc-shaped structures, and gaskets are installed, and finally fixed by positioning pins and locking bolts, but this method has the following disadvantages A defect: 1. There will be oil leakage, and the oil will leak from the gap between the oil pump body and the oil pump cover, causing environmental pollution; 2. Due to the positioning pin and the There will always be a certain error ...

AI Technical Summary

Problems solved by technology

[0002] Oil pumps are widely used in internal combustion engines, especially diesel engines. Most of the existing oil pumps are composed of an oil pump body, an oil pump cover, an inner rotor assembly and an outer rotor. The oil pump body and the oil pump cover are two discs. Shaped structure, the connection between the oil pump body and the oil pump cover is through lamination between two disc-shaped structures, and gaskets are installed, and finally fixed by positioning pins and locking bolts, but this method has the following disadvantages A defect: 1. There will be oil leakage, and the oil will leak from the gap between the oil pump body and the oil pump cover, causing environmental pollution; 2. Due to the positioning pin and the There will always be a certain error in the positioning pin hole during processing of the locking bolt connection, which will cause the oil pump body at both ends of the pump shaft to be incompatible with the positioning holes on the oil pump cover after the oil pump body and the oil pump cover are fixed. Ensure the concentricity, which will lead to a certain eccentricity of the pump shaft, which is easy to cause damage to the pump shaft

In the prior art, it has also appeared that the oil pump cover is made into a disc-shaped structure and clamped on the opening of the oil pump body, but such a method is not convenient for processing, especially for the oil outlet and the oil inlet between the oil pump body. The processing of the oil guide hole is very inconvenient

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