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Calibration device, calibration method and pre-tightening force control method for bolt pre-tightening force measurement

A bolt pretightening force and calibration device technology, applied in the direction of measuring devices, force/torque/power measuring instruments, instruments, etc., can solve the problems of poor accuracy and large errors, so as to improve reliability, improve measurement accuracy, and eliminate safety hidden effect

Active Publication Date: 2017-09-26
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology

[0008] The main purpose of the present invention is to provide a calibration device, a calibration method and a pre-tightening force control method for measuring the bolt pre-tightening force, so as to solve the problems of poor accuracy and large errors in the calibration of the proportional constant of the bolt in the prior art

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  • Calibration device, calibration method and pre-tightening force control method for bolt pre-tightening force measurement
  • Calibration device, calibration method and pre-tightening force control method for bolt pre-tightening force measurement

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Embodiment Construction

[0039]It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0040] In order to solve the problems of poor precision and large errors in the calibration of the proportional constant of the bolt in the prior art, the invention provides a calibration device for measuring the pretightening force of the bolt.

[0041] In the present invention, unless stated otherwise, the used orientation words such as "upper, lower, top, bottom" are usually for the directions shown in the drawings, or for the parts themselves in the vertical, In terms of vertical or gravitational direction; similarly, for the convenience of understanding and description, "inner and outer" refer to the inner and outer relative to the outline of each component itself, but the above orientation...

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Abstract

The invention provides a calibration device, a calibration method and a pretightening force control method for bolt pretightening force measurement. The calibration device includes: an installation part, on which the bolt to be tested is arranged; a nut, which is threadedly connected to one end of the bolt to be tested away from the bolt head; a driving part for driving the nut to rotate relative to the installation part, and the driving part is connected with the nut ; a rotation detection part used to detect the rotation parameters of the nut, the detection end of the rotation detection part is connected with the nut; a strain detection part used to detect the axial strain of the bolt to be detected, the detection end of the strain detection part is in contact with the bolt to be detected. Since the bolt to be detected does not move relative to the mounting part, the measurement accuracy of the axial strain is improved. Therefore, the calibration device in the present invention is used to calibrate the proportional constant K, which can effectively improve the calibration accuracy of the proportional constant K, thereby enabling subsequent installation. The pre-tightening force of the bolt can be effectively measured when the bolt is used, and it has the characteristics of high measurement accuracy.

Description

technical field [0001] The invention relates to the technical field of bolt performance measurement, in particular to a calibration device, a calibration method and a pretension control method for bolt pretension measurement. Background technique [0002] Bolts are widely used in the manufacturing industry. As the main connection and force transmission parts, the safety of bolts is directly related to the safety performance of the entire machine. [0003] In the process of use, accidents caused by deviations in the control of bolt assembly pretightening force occur from time to time. Therefore, it is necessary to precisely control the bolt pre-tightening force when installing the bolts. When measuring the bolt pretightening force, two methods are generally used, one is the torque measurement method, and the other is the rotation angle measurement method. [0004] In the torque measurement method, a torque wrench applies a torque T to achieve the effect of pre-tightening th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/00
Inventor 张保山粟金发
Owner ZOOMLION HEAVY IND CO LTD
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