Device and method of measuring attenuation of bolt clamping force in vibration environment in real-time mode

Abstract

The invention discloses a device and a method of measuring attenuation of a bolt clamping force in a vibration environment in a real-time mode. The device comprises a bolt connection piece, a pressure sensor, a torque wrench, a four-channel amplifier, a data acquisition card, a signal generator, a power amplifier, a vibration table, a vibration level amplification device, a charge amplifier, an oscillograph and a processor, wherein the vibration table loads vibration load to a bolt test piece; the pressure sensor measures changes of the attenuation of the clamping force, the changes are transmitted to the four-channel amplifier in a force signal form, force signal amplification is carried out, the amplified force signals are finally subjected to data acquisition by the data acquisition card, the data are processed on the corresponding processor, the change relationship between the attenuation of the clamping force, the vibration load size and the time is obtained, and a bolt relaxation law is finally obtained. The device and the method have the advantages of high precision, high repetition rate, simple structure, simple operation and real-time monitoring.

Description

technical field [0001] The invention designs a device for measuring the attenuation of bolt clamping force in a vibrating environment and an application method thereof, belonging to the fields of mechanical engineering and mechanics. Background technique [0002] In the assembly of parts of electromechanical equipment, mechanical fasteners are often used for connection, and the most commonly used one is bolt connection. Experiments have proved that bolt connection has better load performance and higher tensile strength. When nuts and bolts are used to connect mechanical parts, nuts are used to tighten them, so that the bolts tend to elongate in the axial direction, and tension is generated to tighten the mechanical parts. Studies have shown that the bolt clamping action can reduce the stress concentration in the bolt hole area and improve the tensile strength and fatigue strength of the bolted connection. Therefore, in important bolt connection occasions, an appropriate cla...

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Problems solved by technology

[0005] In order to overcome the shortcoming that the existing technology cannot realize the real-time quantitative measurement of the change of the bolt clamping force attenuation under the vibration environment

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