Pretightening force measuring system and method of bolt set connection

Abstract

The invention provides a pretightening force measuring system and method of bolt set connection. The system comprises a gasket type force sensor, a testing box connected with the gasket type force sensor, and processing equipment connected with the testing box, wherein the gasket type force sensor is provided with a hole for penetration of a bolt, when the bolt is screwed up, obtained pretightening force signals are transmitted to the testing box, signal conditioning is carried out on the pretightening force signals by the testing box, and the pretightening force signals after the conditioning are transmitted to the processing equipment to be processed. According to the pretightening force measuring system and method, measurement is convenient, the pretightening force in the screwing-up process of a bolt set and after the screwing-up process is monitored in on-site, shaking and other environments, and the pretightening force measuring system and method is portable to be used for measuring.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a pretightening force measuring system and method for bolt group connections. Background technique [0002] Because the bolt connection can generate a large clamping force between the connected parts and can realize the detachable connection conveniently and quickly, it is widely used in various industries in engineering, especially in the machinery manufacturing industry. As we all know, the most fundamental purpose of bolt connection is to generate reliable clamping force on the connected parts, that is, the pre-tightening force inside the bolt. However, it is difficult to directly monitor and control the bolt pretightening force during the tightening process, so in actual engineering, an appropriate pretightening force is often applied inside the bolt by indirect methods such as the torque method. When bolts are used, multiple bolts are often used in groups, and an app...

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Problems solved by technology

[0010] In order to obtain the bolt pre-tightening force, people have thought of many ways. The utility model patent with the application number of 201020300479.8 proposed a pre-tightening force measurement method that converts the bolt pre-tightening force into hydraulic pressure. The utility model patent with the patent number of 200720087776.7 provides A method for testing the overall pre-tightening force of bolt group connections has been proposed, but most of these methods are developed for specific application fields or require bolts to be loaded into special devices, so it is impossible to monitor the pre-tightening force of each bolt in any bolt group, nor to Direct measurement of the pre-tightening force of the bolt group in the field, vibration and other environments

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