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Method and device for measuring axial force of thread fastening member

A technology for threaded fasteners and measuring devices, which can be used to measure torque/torsional force and other directions during tightening, and can solve problems such as low measurement accuracy and inability to obtain the true value of bolt axial force

Active Publication Date: 2013-10-23
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Obviously, the above two methods of measuring the bolt axial force both use the relationship between the bolt axial force and the bolt elongation in the elastic range to detect and track the bolt axial force, which is suitable for measurement in the elastic stage of the bolt. However, when the bolt undergoes plastic deformation , there is a problem of low measurement accuracy, and the true value of the bolt axial force cannot be obtained

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  • Method and device for measuring axial force of thread fastening member
  • Method and device for measuring axial force of thread fastening member
  • Method and device for measuring axial force of thread fastening member

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Embodiment Construction

[0041] The core of the present invention is to provide a threaded fastener axial force measurement method and measuring device to accurately measure the axial force of the threaded fastener in the elastic / plastic range, thereby providing data support for the theoretical research on the reliability design of threaded connections , and then guide the design and assembly process to the direction of precise control.

[0042] Without loss of generality, the specific implementation of the threaded fastener measuring method and measuring device provided by the present invention will be described below by taking the measurement of the axial force of a bolt during actual use as an example in conjunction with the accompanying drawings.

[0043] See figure 1 , figure 1 A flow chart of the method for measuring the axial force of a threaded fastener in a specific embodiment is shown.

[0044] Such as figure 1 As shown, the method for measuring the axial force of threaded fasteners provi...

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Abstract

The invention discloses a method for measuring the axial force of a thread fastening member. The actual use process of connecting a connecting member with a connected member by the thread fastening member is stimulated, a contact pressure between combining surfaces of a connecting member and a connected member is obtained, and the axial force of the thread fastening member is determined according to the contact pressure. A partial acting effect of the axial force of the thread fastening member is realized by the contact pressure between the combining surfaces of the connecting member and the connected member. According to the method, the axial force of the thread fastening member is indirectly determined through the obtained contact pressure by using the characteristic. Obviously, compared with existing measuring methods, the method provided by the invention has the advantages that the axial force of the thread fastening member is indirectly obtained by the acting effect of the axial force, and the measurement precision is not influenced by elastic deformation and plastic deformation of the thread fastening member, and therefore, the method provided by the invention is remarkably superior to the two existing measuring methods on the aspect of measuring precision. On the basis, the invention further discloses a device for measuring the axial force of the thread fastening member.

Description

technical field [0001] The invention relates to the technical field of measuring the axial force of threaded fasteners, in particular to a method for measuring the axial force of threaded fasteners and a measuring device thereof. Background technique [0002] When designing bolts, the axial pretightening force (axial force) required by the bolts must first be determined according to the working conditions and requirements to meet the requirements of the connection; in the actual assembly process of the bolts, a certain torque is usually applied to the bolts so that The bolt axial force meets the design requirements. [0003] In the real working condition of bolted connection, when the bolt is subjected to external load, it is easy to loosen or even loosen, and the axial force of the bolt is attenuated in the process. Bolt axial force attenuation is an important reason affecting mechanical reliability. With the development of science and technology, the importance of reliab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/24
Inventor 陆健李正现陈占善王洋王伟
Owner WEICHAI POWER CO LTD
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