Machining method of plunger piston sleeve of oil pump

Abstract

The invention discloses a machining method of a plunger piston sleeve of an oil pump and belongs to the technical field of an oil nozzle of the oil pump for a diesel engine. The machining method comprises the following step of, with a steel pipe with an axial hole or a die forging piece as a blank, machining the axial hole of the blank into a grinding hole. Compared with the traditional process, the production process is simplified, the production cost is reduced and the production efficiency is improved; and meanwhile, the loss of raw materials is reduced, so that the machining method has obvious economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of oil pump nozzles used in diesel engines, in particular to a processing method for an oil pump plunger sleeve. Background technique [0002] The oil pump is an important part in the fuel supply system of the diesel engine. Its nature and quality have a great influence on the diesel engine. It is called the heart of the diesel engine. It is responsible for supplying the required fuel to the injector regularly and quantitatively. The plunger and the plunger sleeve are a pair of precision coupling parts of the plunger oil pump. They cannot be interchanged after being paired and ground, and require high precision, smoothness and good wear resistance. When working, under the action of the cam on the camshaft and the plunger spring, the plunger is forced to reciprocate in the plunger sleeve to complete the oil pumping task. [0003] The plunger sleeve is a cylindrical body with an axial hole. The axial hole is ...

AI Technical Summary

Problems solved by technology

[0003] The plunger sleeve is a cylindrical body with an axial hole. The axial hole is used to accommodate the plunger and make the plunger reciprocate. Its material should have high mechanical strength, sufficient rigidity, good toughness, and wear resistance. properties, corrosion resistance, and a small coefficient of expansion. Usually, tool steel CrWMn and rolling bearing steel GCr15 are used. The blank material has been using solid bar or solid die forging for many years. Taking solid bar as an example, the traditional processing technology mainly Including: blanking, blank positioning and clamping, rough turning three-stage outer circle, drilling and reaming, grinding holes, finishing three-stage outer circle and other processes, such as Figure 4 Although there is no problem in the quality of the products produced by the solid bar or solid die forging as a blank, the drilling (axial hole) process must be completed in the process. Since the axial hole is a deep hole, it must be drilled Special consideration must be given to the requirements of hole equipment and the processing process, which will increase equipment investment, increase production costs, increase the loss of raw materials, and affect production efficiency.

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