Method for displacing grouped hole-series bushing quickly

Abstract

The invention discloses a method for displacing a grouped hole-series bushing quickly. The method comprises the following steps: firstly, selecting and matching a press-fitting process pin which can be matched with an inner hole of a bushing according to the structural size of the inner hole of the bushing; secondly, dripping a press-fitting liquid into the inner hole of the bushing, and filling the cavity in the lower part of the bushing with the press-fitting liquid; thirdly, placing the press-fitting process pin into the inner hole of the bushing, and exerting a pressure from outside to inside; fourthly, reducing the volume of the space in which the press-fitting liquid is positioned, wherein the bushing drops out because the inner end surface of the bushing is subjected to the produced pressure. According to the method for displacing the grouped hole-series bushing quickly, the bushing can drop out by utilizing the pressure produced by the press-fitting liquid without using mechanical equipment or damaging a base body and the bushing; the bushing is decomposed quickly; the use is safe and reliable; the machining cost is saved; the damage to original parts caused by electric sparks or machining is avoided; the method is easy to operate; the repair time is saved; the damage caused by workpiece scrapping is also prevented.

Description

technical field [0001] The invention relates to the field of precision machining, in particular to a method for quickly replacing a group of hole system bushings, which is used to ensure the position degree requirements of the hole system for fixtures, measuring tools or engine parts, etc., and quickly replace the center position degree of the group of hole systems Bad bushing. Background technique [0002] Because the bushing material is stronger than the matrix and small in size, it is low in cost and durable. Precision fixtures, measuring tools, aero engines and other mechanical equipment generally use reinforced bushings as positioning parts to prolong the service life. [0003] Referring to Fig. 1(a), Fig. 1(b), the characteristics of hole system fixtures, measuring tools and engine parts with reinforced bushings are: [0004] 1. The distance between the holes has high requirements, and more than 85% of them are required to be within Ф0.01; [0005] 2. The aperture is...

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Problems solved by technology

[0005] 2. The aperture is small, more than 95% are within Ф1.5~Ф12;

[0006] 3. High hardness, that is, the hardness of the bush pressed into the substrate is as high as HRC56-64;

This method requires the use of precision machine tools, the processing cycle is long, and it will damage the matrix and destroy the strength, especially for large-scale components of the porous system, which cannot be implemented because it is too cumbersome.

In addition, this method is also limited by the pore size

[0012] When the above two methods are used for large-scale equipment and measuring tools, the components need to be disassembled, increasing the number of disassembly and installation, increasing the workload and increasing the possibility of damage to parts

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