A method for controlling the concentricity between the deep hole and the outer circle of a deep hole piston rod

Abstract

The invention provides a deep hole piston rod deep hole and outer circle coaxiality control method. The method comprise the following steps that (a) the end face of the large-head end of a piston rodand the end face of the hole opening end of the piston rod are flatten through turning, outer circles of the piston rod undergo semi-finish turning, and a blind hole is drilled from the center of thehole opening end; (b) the wall thickness of one circle at the deep part of the blind hole is measured, and the correction size of the outer circle of the large-head end is calculated; (c) the positioncorresponding to the central axis of the blind hole is found on the outer circle of the large-head end by utilizing the correction size, and two reference outer circles are turned on all the outer circles of the piston rod correspondingly; and (d) the two reference outer circles are used as reference, the piston rod is fixed, the end face of the large-head end is flattened through turning, the center hole of the end face of the large-end is corrected, the outer circle at the large-head end is turned to meet the required size through the center hole of the large-head end, the end face of the hole opening end is flatten through turning, a rabbet of the hole opening end is turned, and other outer circles are turned to meet the required sizes through the rabbet of the hole opening end. According to the deep hole piston rod deep hole and outer circle coaxiality control method, the advantages that the design is novel, the product quality is good, the production cost is low, and the production efficiency is high are achieved.

Description

technical field [0001] The invention relates to a process for producing a deep-hole piston rod, in particular to a method for controlling the coaxiality between the deep hole and the outer circle of the deep-hole piston rod. Background technique [0002] Mine hydraulic support is an important equipment to ensure safe production in coal mines. It uses hydraulic pressure as power to realize lifting, moving forward, supporting and other actions. The jack is the key component of the hydraulic support and the execution unit for the hydraulic support to complete various actions. The action accuracy of the jack determines the action quality of the hydraulic support. In order to ensure the movement quality requirements of the hydraulic support, a displacement sensor is installed inside the key jack, and the jack with a displacement sensor is installed inside. The piston rod is a blind hole (deep hole) piston rod, which requires the coaxiality error <0.4mm. [0003] The conventi...

AI Technical Summary

Problems solved by technology

In order to ensure the coaxiality requirements, measures such as improving the accuracy of tooling and cutting tools and reducing processing parameters are generally taken, resulting in high production costs, low efficiency, and the pass rate is still difficult to guarantee

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