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Experimental device for measuring pulling resistance of bolt

An experimental device, a technology of pull-out force, applied in the direction of measuring device, railway fixing device, using stable tension/pressure testing material strength, etc., can solve the problems of high cost, complicated measuring device, and no consideration of the influence of bolt torque, etc. Achieve the effect of convenient adjustment and meeting the measurement needs

Inactive Publication Date: 2021-04-02
CENT SOUTH UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are already some test devices for bolted connections, but the existing devices still have many deficiencies, such as not considering the influence of bolt pre-loaded torque in actual working conditions; or not being able to record displacement and stress at the same time to obtain accurate The ability of the load-displacement curve; or the measuring device is too complicated, the production and processing technology requirements are high, and the cost is high; therefore, it is necessary to design a set of experimental devices that can automatically control the loading and record the displacement and pull-out force for bolted connections

Method used

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  • Experimental device for measuring pulling resistance of bolt
  • Experimental device for measuring pulling resistance of bolt
  • Experimental device for measuring pulling resistance of bolt

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Embodiment Construction

[0020] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered by the claims.

[0021] refer to figure 1 , the present invention provides an experimental device for measuring the pull-out force of bolts, comprising a load-bearing frame 1, a jack 2, a force sensor 3, a pull-out frame 4, a displacement sensor 5, a hydraulic system 6 and a servo system 7; the pull-out frame includes a first A base plate 4.1 and a second base plate 4.2, the first base plate and the second base plate are respectively two steel plates with the same specifications; the first base plate 4.1 and the second base plate 4.2 are connected by four screws 4.3 with the same specifications, one end of the screw It is welded and fixed with the first bottom plate, and the other end of the screw rod is anchored through the second bottom plate; the first bottom plate is p...

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Abstract

The invention provides an experimental device for measuring the pulling resistance of a bolt. The experimental device comprises a bearing frame, a jack, a force sensor, a pulling frame, a displacementsensor, a hydraulic system and a servo system. The device is simple in structure, the hydraulic system is controlled by the servo system to drive the jack to conduct automatic loading, the device issuitable for loading under different working conditions, an accurate bolt sleeve pulling resistance load displacement curve is obtained by reading data of the force sensor and the displacement sensorthrough the servo system, quantitative scientific research is facilitated, and the problem that an existing measuring device is single in function is solved.

Description

technical field [0001] The invention relates to the field of bolt pullout resistance testing, in particular to an experimental device for measuring bolt pullout resistance. Background technique [0002] In the high-speed railway track slab structure, the bolt is an important restraint structure, and its mechanical characteristics and service performance need to be tested to evaluate the safety and stability of the track structure. At present, there are already some test devices for bolted connections, but the existing devices still have many deficiencies, such as not considering the influence of bolt pre-loaded torque in actual working conditions; or not being able to record displacement and stress at the same time to obtain accurate The ability of the load-displacement curve; or the measuring device is too complicated, the production and processing technology requirements are high, and the cost is high; therefore, it is necessary to design an experimental device that can au...

Claims

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Application Information

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IPC IPC(8): G01N3/10G01N3/02E01B1/00
CPCE01B1/002E01B2201/04E01B2204/09G01N3/02G01N3/10G01N2203/0017G01N2203/0048
Inventor 陈伟张天齐邹文杰严晓东徐洪岐张海峰
Owner CENT SOUTH UNIV
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