A comprehensive anti-loosening and anti-fatigue performance testing device for bolted connection components
A technology for comprehensive performance testing and connecting components, which is used in measuring devices, testing of mechanical components, testing of machine/structural components, etc. It can solve problems such as the inconsistency between the actual application of the anti-loosening performance testing of bolted components, and achieve the goal of promoting development. Effect
Active Publication Date: 2021-12-28
HUBEI UNIV OF AUTOMOTIVE TECH
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Problems solved by technology
[0003] At the same time, the inventor also found in the process of realizing the present invention that: the anti-loosening performance test of the existing bolt connection components usually only considers the lateral vibration in one direction, and the vibration suffered by the bolt in the actual service state is often not a single direction vibration In addition, the existing test method does not include the effect of creep on bolt loosening and failure, resulting in the results of the anti-loosening performance test of bolted joint components inconsistent with the actual application
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[0026] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.
[0027] The present invention as Figure 1 to Figure 9 Shown:
[0028] A comprehensive anti-loosening and anti-fatigue performance testing device for bolted joint components, including a testing unit, a bracket unit and a driving unit,
[0029] The support unit includes L-shaped vertical plates 8 on both sides (rib plates are provided between the L-shaped horizontal section and the vertical section), an upper fixed plate 7, a lower fixed plate 9 and a support 10, and the upper fixed plate The plate 7 is fixed on the top of the vertical plate 8, and the lower fixed plate 9 is fixed on the inside of the two vertical plates 8 through the support 10, and the support is fixed on the vertical plate;
[0030] Described test unit comprises vibration mold 100, fixed mold 300, ball 200, heating furnace 400, pressure sensor 500 and anti-...
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The invention discloses a comprehensive anti-loosening and anti-fatigue performance testing device for a bolt connection assembly, which includes a testing unit, a bracket unit and a driving unit, and the bracket unit is used for installing the testing unit and the driving unit; Vibration mold, fixed mold, balls, heating furnace, pressure sensor and anti-rotation plate in the center hole, there is a movable gap between the center hole of the vibration mode and the screw, and the center hole of the anti-rotation plate has a circumferentially limited structure corresponding to the screw, It is used to install the bolts to be tested. There are two vertical lugs on the outer circumference of the vibration mold; the drive unit is connected to the two lugs through two sets of crank linkage mechanisms, and the vibration mold is driven by the drive shaft to perform circular vibration. The invention is used for testing the pretightening force relaxation or loosening performance of the bolt due to the coupled action of vibration and creep, and the induced shear or bending fatigue damage. Compared with the prior art, the device is closer to the connection failure caused by the comprehensive action of multiple factors under the service condition of the bolt.
Description
technical field [0001] The invention relates to the technical field of reliability testing of bolted connection components, in particular to an anti-loosening and anti-fatigue comprehensive performance testing device for bolted connection components, which is used for testing the anti-loosening and fatigue resistance performance of bolted connection components under vibration and creep coupling conditions. Background technique [0002] The preload relaxation and loosening of bolted joint components during service is caused by a combination of factors, including plastic deformation, vibration, thermal expansion, and creep. The loosening or loosening of the preload caused by these factors can also couple with other factors and eventually lead to the failure of the bolted assembly. For example, the relaxation of preload provides a window for the lateral vibration of the connected components, so that the bolts not only face the problem of vibration loosening, but also face repea...
Claims
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IPC IPC(8): G01M7/06G01M13/00
CPCG01M7/06G01M7/022G01M13/00
Inventor 张家陶
Owner HUBEI UNIV OF AUTOMOTIVE TECH