Thrust bearing shell or protector shell machining process

Abstract

The invention provides a machining process for a thrust bearing shell or a protector shell. The machining process comprises the following steps that (1) an inner hole of the thrust bearing shell or the protector shell is honed to the required size; (2) one end of the thrust bearing shell or the protector shell is clamped through a lathe chuck, the other end face of the thrust bearing shell or the protector shell is aligned, burrs on the end face are removed through polishing, and after one end is completed, the other end is machined in a U-turn mode; (3) ejecting inner holes in the two ends of the thrust bearing shell or the protector shell by using a tip, and machining and turning an outer circle by using a lathe; and (4) clamping the outer circle part of the thrust bearing shell or the protector shell by using a double-end numerical control lathe, and simultaneously machining spigot parts and thread parts at the two ends of the thrust bearing shell or the protector shell. According to the method, the shape and location tolerance requirements (the coaxiality tolerance is smaller than or equal to 0.02 mm, and the end face parallelism tolerance is smaller than or equal to 0.01 mm) of the shell are met, the machining efficiency is high, and raw materials are saved; working efficiency is high, operation is easy, learning is easy, and machining difficulty is low.

Description

technical field [0001] The invention relates to the field of downhole equipment for oil pumping, in particular to a processing technology for a thrust bearing shell or a protector shell. Background technique [0002] The working environment of pumping downhole equipment is complex and the conditions are harsh; its quality can directly affect the production of oil wells. Therefore, the machining accuracy of parts of downhole equipment is high, and its shape and position tolerance requirements are very strict. For example, the position tolerance requirements of the thrust bearing housing and the protector housing are very strict, the parallelism tolerance of the end faces at both ends of the housing is ≤0.01mm, and the axis of the spigot part and the threaded part at both ends of the housing is the same as the axis of the inner hole of the housing. The axial tolerance requirement is ≤0.02mm, which requires a set of reasonable processing technology during the processing of the...

AI Technical Summary

Problems solved by technology

[0003] At present, the processing of the thrust bearing shell or the protector shell is often done by clamping one end of the lathe chuck first (turning end face, turning stop, turning thread), and then processing the other end of the shell after completion. Due to the processing technology, the coaxiality tolerance of the seam at both ends of the shell, the threaded part and the inner hole of the shell cannot meet the requirements. The tolerance range is often above 0.10mm, and the parallelism tolerance of the two ends of the shell must also be ≥ 0.05mm. unable to meet requirements