Corrosion detection method for bolt standard parts

Abstract

The invention relates to a standard bolt part corrosion test method, which comprises the following steps: (Step 1) according to laboratory environment data of different models of standard bolt parts,a corrosion degree-performance test table is compiled; (Step 2) the magnitude of initial installation screwing torque of a bolt and a nut is recorded, a torque method is adopted to screw down the boltand the nut according to the installation requirement and specifications of the bolt and the nut and the requirement of screwing torque, the magnitude of initial installation screwing torque is accurately measured, and the magnitude of initial installation screwing torque is a basis for subsequent judgment on bolt corrosion failure; (Step 3) in the process of removing the bolt and the nut, the surface states of the bolt and the nut are detected, and factors which affect a torque test are removed; (Step 5) after the usage of a standard bolt part corrosion torque test engineering instrument iscompleted, the power is switched off. Because the standard bolt part corrosion test method does not need to remove the bolt before testing, cost is reduced, time is saved, and working efficiency is improved; the standard bolt part corrosion torque test engineering instrument is easy to operate and learn and convenient to carry; the testing accuracy is high, the standard bolt part corrosion test method can ensure that the testing precision is 70 percent, and moreover, by combining a corrosion degree-performance test table of standard bolt parts with a tester, the standard bolt part corrosion test method can predict service lives of standard bolt parts.

Description

technical field [0001] The invention belongs to the technical field of corrosion detection, and in particular relates to a corrosion detection method for bolt-type standard parts. Background technique [0002] With the continuous development of my country's aviation industry, the performance of various military aircraft and civil aircraft has been continuously improved, and they have gradually served as an important means of transportation in all aspects of life such as national security defense, tourism, and freight transportation, especially since the 20th century. In the process of deepening the national economic development strategy and awareness of maritime rights, aircraft are serving and used more and more frequently in coastal and ocean areas, and have become the most important mode of transportation in coastal areas. However, in the face of the influence of complex and harsh environments such as high salt, high humidity, and high temperature in the ocean, the corrosi...

AI Technical Summary

Problems solved by technology

[0004] At present, domestic bolt standard parts testing includes mechanical performance testing and macroscopic and microscopic appearance inspection. Mechanical performance inspection is mainly to detect the qualified performance indicators of bolts leaving the factory. Macroscopic and microscopic appearance inspection is not effective as a means of laboratory research on performance indicators of bolts after corrosion Instruct the repair shop to judge whether the standard parts are invalid

In particular, a large number of repair shops for aircraft, ships, bridges, etc. are faced with the problem of replacing a large number of standard parts. There is no fast and effective method for detecting the failure of bolt standard parts. In recent years, some methods for detecting corrosion failure of standard parts have been formed. methods, such as eddy current testing and ultrasonic testing, but these methods are too cumbersome to operate for repair shops, and the detection efficiency is low. While increasing the cost of the maintenance plant, it also causes a waste of resources

At the same time, laboratory methods such as macroscopic and microscopic detection of standard bolts and mechanical performance detection cannot quickly and simply detect the performance of large quantities of bolts in engineering, and cannot provide timely information to the repair shop on whether to replace standard bolts, which has caused extreme damage to the repair shop. It is very inconvenient, whether the corrosion degree of bolt standard parts can be quickly and effectively detected is of great significance to the repair shop

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