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Device and method for measuring torque coefficient of high-strength bolt connecting pair

A technology of high-strength bolts and torque coefficients, which is used to measure torque/torsion force and other directions during tightening, can solve the problems of manual work that is difficult to control accuracy, achieve accurate axial strain values, ensure measurement accuracy, and reduce stress The effect of uneven influence

Pending Publication Date: 2017-01-04
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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AI Technical Summary

Problems solved by technology

[0015] When measuring the torque coefficient k of a high-strength bolt connection pair, in the prior art, during the screwing process, the operator often uses a torque wrench to manually apply torque, but because the torque wrench has a certain error, about ±3%, manual work It is difficult to control the exact precision when

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  • Device and method for measuring torque coefficient of high-strength bolt connecting pair
  • Device and method for measuring torque coefficient of high-strength bolt connecting pair
  • Device and method for measuring torque coefficient of high-strength bolt connecting pair

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Embodiment Construction

[0041] The present invention is described in further detail below in conjunction with accompanying drawing:

[0042] Such as Figure 1 to Figure 3 As shown, the device for measuring the torque coefficient of the bolt connection pair of the present invention includes a device to be tested, a test piece fixing device, a test piece loading device, and a data acquisition system:

[0043] The specimen fixing device includes an outer rectangular frame, an inner rectangular frame, a first high-strength bolt 3, an adjustable screw rod 6, a second high-strength bolt 8, and a third high-strength bolt 17, wherein the outer rectangular frame includes an outer bottom plate 1 and an outer baffle 2 , the outer top plate 7, the inner rectangular frame includes the inner bottom plate 4, the inner side baffle plate 5, and the inner side top plate 16;

[0044] The device to be tested includes a one-way strain gauge 18 and a high-strength bolt connection pair 15 to be tested;

[0045] The speci...

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Abstract

The invention belongs to the technical field of mechanical measuring instruments and equipment, and relates to a device and a method for measuring a torque coefficient of a high-strength bolt connecting pair. The device comprises a fixing device fixedly connected with a high-strength bolt connecting pair to be measured, and a torque spanner arranged at a nut matched with the high-strength bolt connecting pair to be measured and used for applying a torque to the nut, wherein the torque spanner is connected with the nut through a sleeve; a torque sensor is arranged between the torque spanner and the sleeve; the torque sensor is connected with a torque display; unidirectional strain sheets for measuring the axial strain of a screw of the high-strength bolt connecting pair to be measured are arranged on the screw between the nut and the head of the high-strength bolt connecting pair to be measured; the unidirectional strain sheets are connected with a resistance strain gauge. The device is simple in assembly, fast in operation, and accurate and reliable in measurement result, and is especially applicable to detection on the torque coefficients of the high-strength bolt connecting pairs in small batches.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of mechanical measuring instruments and relates to a device and method for measuring the torque coefficient of high-strength bolt joints. [0003] 【Background technique】 [0004] The high-strength large hex head bolt connection pair is a structural connection fastener composed of a bolt, a nut and two washers manufactured in the same batch. As an important way to connect steel structural members, it has the advantages of simple construction and good mechanical performance. , fatigue resistance, high connection reliability and other advantages, it has been widely used in large-scale steel structure engineering and road bridges. Among them, the torque coefficient of the high-strength bolt connection pair is an important index to evaluate the connection performance of components, and plays a key role in ensuring the safety and quality of the project. [0005] At present, the calculation of the torque c...

Claims

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Application Information

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IPC IPC(8): G01L5/24
CPCG01L5/24
Inventor 杨俊芬战宇皓程锦鹏谢坚李宝琪
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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