A shaft hole coaxiality positioning assembly and a positioning method using the same

Abstract

The invention discloses a shaft hole coaxiality positioning assembly and a positioning method for the positioning assembly, belonging to the technical field of shaft hole installation in aircraft manufacturing. The positioning assembly comprises a hole contact block and a shaft contact block, wherein one end of the hole contact block is Arc surface structure; the other end of the hole contact block is provided with a groove, the side of the hole contact block is provided with a fixing hole, the arc surface structure of the hole contact block is used to contact the inner surface of the hole, and one end of the shaft contact block is angularly positioned The other end of the shaft contact block is provided with a raised structure matching the groove, the angular positioning groove is used to contact the outer surface of the shaft, and the raised structure of the shaft contact block can slide in the groove and pass through the groove. The jacking wire passes through the fixing hole to fix the hole contact block and the shaft contact block, which solves the problem that the shaft and the hole center cannot be guaranteed to be on the same line in the prior art when the shaft hole is installed, and the installation accuracy is not high, which can significantly extend the machine tool. service life.

Description

technical field [0001] The invention relates to the technical field of shaft hole installation in aircraft manufacturing, in particular to a shaft hole coaxiality positioning assembly and a positioning method using the positioning assembly. Background technique [0002] In the field of aircraft manufacturing, compared with other general machinery manufacturing fields, there are higher requirements for manufacturing accuracy and reliability. In the machining equipment-machine tool, the whole machine is composed of various functional components, and the functional components are assembled from parts. The factors that affect the running stability of components mainly include two parts: manufacturing accuracy and assembly accuracy. [0003] Among them, bearings are widely used as rotating positioning components. The installation accuracy of bearings is generally guaranteed by special tooling. General-purpose tools are limited by space and cannot be measured and tested, and the i...

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Problems solved by technology

[0005] 1. Before installation, the measurement error of conventional measuring tools is relatively large, and various auxiliary tools need to be borrowed during the measurement process. The coaxiality of the shaft and the hole needs to be re-measured and calculated after each adjustment. The adjustment process is complicated and time-consuming, and the measurement accuracy cannot be obtained. Effective guarantee, low precision adjustment of shaft hole coaxiality

[0006] 2. During installation, it is easy to cause damage to bearings and components

Due to the low coaxiality of the shaft hole, when the bearing is installed, the inner rollers of the bearing are unevenly stressed, resulting in concentrated impact on the bearing rollers locally

At the same time, due to the uneven force on the contact surface between the bearing and the shaft or hole, the attitude of the bearing during installation is unstable, which may cause damage to the mating surface of the shaft or hole, resulting in a decrease in the accuracy of the part and scrapping

[0007] 3. After installation, the working stability and life of the bearing cannot be guaranteed

During the installation process, the operation lacks standardization, and the degree of bearing damage is uneven. Although some parts are not directly damaged, irregular damage has occurred inside the bearing, which will accelerate the wear during use and lead to a decrease in service life.

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