Method and device for actual torque detection after bolted connection of railway vehicles

Abstract

The invention provides a method for actual torque detection after bolted connection of railway vehicles. The method comprises the following steps: further screwing a connected to-be-detected bolt; detecting an angular displacement value and a torque valve in the further screwing process through an angle and torque compound sensor; performing real-time displaying, monitoring and recording to the detected angular displacement value and the torque valve through an industrial personal computer with a software system of a torque detection system, and presetting a maximal further screwing angle through the industrial personal computer, when the angular displacement value sensed reaches the maximal further screwing angle, alarming automatically, recording the torque value at the moment, namely, the actual torque of the to-be-detected bolt. Additionally, the invention also provides a device for actual torque detection after bolted connection of the railway vehicles. The method and the device provided by the invention are simple and convenient to operate, accurate, and provide basis for actual torque detection after the bolt is screwed down, follow-up repeated screwing and follow-up improvement of product design.

Description

technical field [0001] The invention relates to a method and device for detecting actual torque after bolt connection, in particular to a method and device for detecting actual torque after bolt connection of rail vehicles. Background technique [0002] After the rail vehicle is in operation, it is necessary to check whether the fasteners of the vehicle are loose, what is the "remaining" torque value, and whether retightening is required. The current detection methods mainly include the following two types: 1. Ordinary torque wrench torque value incremental detection method: through the ordinary torque wrench to increase the torque value step by step for detection, on the one hand, the detection accuracy of this method is low, on the other hand, it may cause If the bolts are over-tightened, it may even cause the connection structure here to be scrapped; 2. The digital display torque wrench tightening method: use the digital display torque wrench to increase the tightening an...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method and device for detecting the actual torque after the rail vehicle is bolted with simple operation, strong practicability and reliable detection, so as to solve the problems of low detection accuracy and over-reliance on the experience of the tester in the prior art. Problems such as uncontrollable tightening angle and overtightening of bolts

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