A kind of lateral vibration test device and test method of threaded fastener

Abstract

The invention discloses a threaded fastener transverse vibration test device and method. The device comprises a transverse vibration platform, a transmission system, a clamp system, an installation base and a measuring device; one end of the transmission system is fixed to the vibration platform through a bolt, and the other end of the transmission system is fixed to a movable plate in the clamp system; a fixed base of the clamp system is fastened to the installation base through a T-shaped groove; the transmission system is provided with a pull pressure sensor, and the clamp system is provided with a gasket type force sensor. The device and method can simulate high-frequency vibration, achieve electrodeless amplitude modulation, monitor changes of transverse shear force and axial pre-tightening force of a threaded fastener in a vibration process in real time, and test the anti-loose characteristic of single bolts and bolt sets (distributed in a linear, rectangular and circular mode) with different specifications. The device and method provide a basis platform and data support for engineering technicians to analyze anti-loose performance of various threaded fasteners and assess effectiveness of various anti-loose methods.

Description

technical field [0001] The invention belongs to the field of lateral vibration test devices, in particular to a lateral vibration test device and a test method for threaded fasteners. Background technique [0002] Threaded connection has the advantages of easy to obtain large connection force, easy assembly, disassembly and maintenance, low price, strong interchangeability, etc. It has become the most common and widest connection method in mechanical structure assembly, and threaded fasteners have also become indispensable. Fewer mechanical parts. The performance of most threaded connections depends on the magnitude and stability of their axial preload. However, when the threaded connection is disturbed by external loads, especially the lateral vibration load, the threaded connection is prone to loosening and failure, and the threaded connection force is gradually reduced or even completely lost, which often leads to very serious personal safety and property losses. . The...

AI Technical Summary

Problems solved by technology

This structure leads to a complex structure of the lateral vibration testing machine, low operating frequency, and difficulty in adjusting the amplitude and vibration acceleration.

In addition, its test fixture is only suitable for the verification of the anti-loosening effect of a single bolt, and it cannot carry out the test of the bolt group, and the test system cannot detect the change of the transverse shear force of the bolt specimen in real time.

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