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Fatigue test device for simulating bolt connection opening and closing effect

A technology for fatigue testing and bolts, which is applied in the field of fatigue testing devices for simulating the opening and closing effect of bolt connections, can solve problems such as single load direction and inability to truly simulate the stress state of bolts, and achieve improved work efficiency, economical and convenient fatigue tests, and overall The effect of simple structure

Pending Publication Date: 2022-03-01
DALIAN UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a fatigue test device for simulating the opening and closing effect of bolts, which solves the problem that the load direction is single and the actual stress state of the bolts cannot be truly simulated.

Method used

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  • Fatigue test device for simulating bolt connection opening and closing effect
  • Fatigue test device for simulating bolt connection opening and closing effect
  • Fatigue test device for simulating bolt connection opening and closing effect

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] A fatigue test device for simulating the opening and closing effect of bolted joints, such as Figure 1-5 As shown, the fatigue test device for simulating the opening and closing effect of bolts includes two parts: the upper force plate 1 and the lower force plate 2 . Wherein there are 0°, 30°, 60°, 90°, 112.5°, 135° and 157.5° ( image 3 The positioning hole A12 in the sequence from right to left in the center), the position of the 0° positioning hole adopts a single lifting lug 11, and the center of the circle of the upper force plate 1 is opened with a positioning hole B13; the lower force plate 2 is also opened with 7 kinds of corresponding angles locating hole C22, and the 0° locating hole position adopts symmetrical double lugs 21, and the center of circle of the lower power transmission plate 2 has a locating hole D23. The middle part of...

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Abstract

The invention provides a fatigue testing device for simulating a bolt connection opening and closing effect, and belongs to the field of bolt testing. The device comprises an upper force transmission disc and a lower force transmission disc which can be matched positively and negatively, positioning holes with specific angles are formed in the two force transmission discs, a shaft pin penetrates through the positioning holes and is positioned, and the force transmission discs are connected with a pull rod; and the single lifting lug of the upper force transfer disc and the double lifting lugs of the lower force transfer disc can realize the same-direction matching of the upper part and the lower part. The replaceable sleeve is mounted in the middle of the two force transfer discs; and the clamping ends of the two pull rods are respectively connected with an upper chuck and a lower chuck of the fatigue testing machine. According to the invention, through the positioning holes of the force transmission disc, the fatigue performance of the bolt under the action of loads in different directions and eccentric loads can be rapidly tested, and the device can truly reflect the stress condition of the bolt under a real working condition; and the whole fatigue test device is simple in structure, and the test cost is reduced.

Description

technical field [0001] The invention belongs to the field of bolt testing, in particular to a fatigue testing device for simulating the opening and closing effect of bolt connections. Background technique [0002] With the rapid development of prefabricated structures in recent years, bolts are widely used in various industries such as machinery, ships, civil engineering, and aviation because of their high connection strength, convenient disassembly, simple structure, and low cost. Bolt connection is an important guarantee for the transmission of force and torque of the connected parts and the sealing performance of the whole device. The connection performance of bolts directly affects the safety and reliability of the connected structure. In actual working conditions, on the basis of the pre-tightening force, the bolts will also be subjected to loads in various directions such as tension and compression, shearing and bending generated by the outside world, which will eventu...

Claims

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Application Information

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IPC IPC(8): G01M13/00
CPCG01M13/00Y02E30/30
Inventor 张伟张明栋孙志亮王路广谭龙飞孙伟
Owner DALIAN UNIV OF TECH
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