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Method for testing relationship between pre-tightening force and torque of threaded fastener

A threaded fastener and pre-tightening force technology, which is applied to measure the direction of torque/torsion force during tightening, can solve the problems of inconvenient replacement of the connected parts of the test device, inconsistent loading methods, and inconsistent use conditions, and achieve test results. Accurate and reliable, saving the material of the connected parts, and reducing the test cost

Pending Publication Date: 2021-11-16
SHANXI PINGYANG IND MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the invention is to design a test method for testing the relationship between pretightening force and torque of threaded fasteners. By carrying out a loading test on the tested threaded fasteners, the loading mode and usage during the test that exist in the existing test methods are solved. The problem of inconsistent loading methods; the need to drill holes when testing the strain value of the threaded fasteners, resulting in the inconsistency between the test state and the actual use state; and the inconvenient replacement of the test device by the connecting parts, large waste of materials, high test cost, etc. technical problem

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  • Method for testing relationship between pre-tightening force and torque of threaded fastener
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  • Method for testing relationship between pre-tightening force and torque of threaded fastener

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Embodiment Construction

[0042] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0043] It is known that a certain M10×1.5 hexagon head screw (tested screw 10) is known. Using the method of the present invention to test the pretightening force and torque relationship between the screw and the specified material when the coupling is connected, the specific steps are as follows:

[0044] S1. Establish a test device for testing the relationship between pretightening force and torque of threaded fasteners ( Figure 1-Figure 3), including the base plate 1, the base plate 1 is drilled with a threaded hole, the threaded hole is embedded with an insert 2 and ...

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Abstract

The invention relates to a method for testing the relationship between the pre-tightening force and the torque of a threaded fastener, in particular to a method for detecting and recording the torque and the tension value of the threaded fastener in real time through a loading test and then obtaining the relationship between the pre-tightening force and the torque of the threaded fastener through data processing. According to the invention, the test device for testing the relationship between the pre-tightening force and the torque of the threaded fastener is established to test the relationship between the pre-tightening force and the torque of the threaded fastener, the test process completely simulates the torque loading process when the threaded fastener works, the test data result is closer to the actual use condition, and the guidance on the actual use is stronger. The strain value of the threaded fastener can be detected when the threaded fastener is stressed without punching and threading on the threaded fastener to be tested, the stress condition of the threaded fastener to be tested is not changed, the test state is completely consistent with the actual use state, and the test result is more accurate and reliable.

Description

technical field [0001] The invention relates to a method for testing the relationship between the pre-tightening force and torque of a threaded fastener, specifically means detecting and recording the torque and tension value of the threaded fastener in real time through a loading test, and then obtaining the pre-tightening force of the threaded fastener through data processing. The method of tightening force and torque relationship. Background technique [0002] In industrial products, a large number of threaded connection structures are used as connecting fasteners, and the pre-tightening force is generated by applying torque to the threaded fasteners to achieve the connection and fastening between parts. Whether the pre-tightening design of threaded fasteners between parts is reasonable or not directly affects the reliability of the connection between parts, such as connection strength, stiffness and looseness prevention. [0003] Since the pre-tightening force after thr...

Claims

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Application Information

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IPC IPC(8): G01L5/24
CPCG01L5/24
Inventor 张栋杨锋张德华任燕宏焦春
Owner SHANXI PINGYANG IND MACHINERY
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