Method for machining concentric holes of variable shell of axial plunger pump and clamp

Abstract

Disclosed is a method for machining concentric holes of a variable shell of an axial plunger pump. The variable shell is fixed to a tool clamp, and a diamond honing and reaming stick is connected to a main shaft of a numerical control boring and reaming machine through a conical face and a floating loose joint and is used for machining the concentric holes, with the different diameters, of the variable shell; the diamond honing and reaming stick can be in three specifications including a coarse concentric honing and reaming stick, a semi-fine concentric honing and reaming stick and a fine concentric honing and reaming stick; and the coarse concentric honing and reaming stick, the semi-fine concentric honing and reaming stick and the fine concentric honing and reaming stick are used for three different machining working procedures including coarse machining, semi-fine machining and fine machining of the concentric holes of the variable shell respectively, and finally the overall machining process of the concentric holes of the variable shell is completed. The requirement for the cylindricity tolerance value of 0.005 mm between the concentric holes D and d and the axiality tolerance value of 0.01 mm between the concentric holes D and the d are met. The precision of the centric holes, machined according to the method, of the variable shell meets the design requirement and is not affected by manual work; and meanwhile, the labor intensity of workers is relieved, the production efficiency is improved, and the manufacturing cost is reduced.

Description

technical field [0001] The present invention relates to plunger pump technology, in particular to a processing method for concentric holes in variable casings of axial plunger pumps; and also to a tooling fixture matched with the processing method. Background technique [0002] The axial piston pump variable housing 10 needs to process two concentric holes D and d with different diameters (see figure 1 ), when the two concentric holes are finished in the last process, they are all manually ground with cast iron grinding rods. The dimensional accuracy of the processed concentric holes of the variable housing is greatly affected by artificial factors, and the quality is unstable, which cannot meet the requirements of the product. The hole cylindricity tolerance value of 0.005mm and the coaxiality tolerance value of 0.01mm are required in the design drawing; and the labor intensity of workers during the processing is high and the efficiency is low; the consumption of cast iron ...

AI Technical Summary

Problems solved by technology

[0002] The axial piston pump variable housing 10 needs to process two concentric holes D and d with different diameters (see figure 1 ), when the two concentric holes are finished in the last process, they are all manually ground with cast iron grinding rods. The dimensional accuracy of the processed concentric holes of the variable shell is greatly affected by artificial factors, and the quality is unstable, which cannot meet the requirements of the product. The hole cylindricity tolerance value of 0.005mm and the coaxiality tolerance value of 0.01mm are required in the design drawing; and the labor intensity of workers is high and the efficiency is low in the processing process; the consumption of cast iron grinding rods is large, and the manufacturing cost of tooling is high

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