An Intelligent Gasket for Preload Monitoring

Abstract

The invention belongs to the technical field of fastener detecting, and particularly relates to an intelligent gasket capable of achieving pretightening force monitoring. The intelligent gasket comprises a gasket body, a rectangular through hole, a threaded hole, a locating screw and a stress mechanism. The rectangular through hole is formed in the gasket body. The threaded hole is formed in the top of the gasket body and communicates with the rectangular through hole. The locating screw is mounted in the threaded hole in a threaded manner. The stress mechanism is arranged in the rectangular through hole. According to the intelligent gasket, bolt pretightening force changes and the bolt loosening degree can be monitored, and the intelligent gasket has the advantages of being high in reliability, capable of resisting electromagnetic interference and oil dirt, high in measuring precision and the like.

Description

technical field [0001] The invention relates to the technical field of fastener detection, in particular to an intelligent gasket for pretightening force monitoring. Background technique [0002] Bolt connection can generate a large clamping force between the connected parts, and it is easy to assemble and disassemble. After standardization, it is easy to realize mass production, and it is low in cost, cheap and interchangeable. It has become the most widely used in the assembly of many industrial products. connection method. The most fundamental purpose of bolted connection is to generate a reliable clamping force between the connected parts, that is, the preloaded force inside the bolt. The preloaded force control of bolted connection directly affects the assembly quality and reliability of the entire product. Too much preloaded force If the pre-tightening force is insufficient, it will easily cause the bolt to loosen. [0003] However, it is difficult to directly monito...

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Problems solved by technology

[0003] However, it is difficult to directly monitor and control the pre-tightening force of bolted connections during the tightening process. In engineering, indirect methods such as torque method and angle method are often used to control the pre-tightened force of bolted connections, so as to achieve the purpose of fastening. At present, the most common tightening method used in engineering is the torque method, which makes the control of the bolt tightening quality overly dependent on the tightening torque, but the torque of the bolt tightening is affected by the machining accuracy of the bolt and the friction force on the thread secondary surface. The remaining clamping force will be different, and in practical engineering applications, bolted connections in mechanical assembly are often used in groups of multiple bolts, and it is more difficult to control the pre-tightening force in the bolted group connection. It is more difficult to monitor the remaining clamping force of each bolt. For this reason, a smart gasket with preload monitoring is proposed

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