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

A bolt pre-tightening and calibration device technology, applied in measuring devices, force/torque/work measuring instruments, instruments, etc., can solve problems such as large errors and poor accuracy, and achieve improved measurement accuracy, improved reliability, and eliminated safety. hidden effect

Active Publication Date: 2015-05-13
ZOOMLION HEAVY IND CO LTD
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  • Claims
  • Application Information

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

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[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 and a calibration method for bolt pre-tightening force measurement and a pre-tightening force control method. The calibration device comprises an installing portion, a nut, a drive portion for driving the nut to rotate relative to the installing portion and connected with the nut, a rotation detecting portion for detecting a rotation parameter of the nut and a strain detection portion for detecting axial stain of the bolt to be detected, wherein a bolt to be detected is arranged on the installing portion, the nut is in threaded connection with the end away from a bolt head of the bolt to be detected, the detection end of the rotation detecting portion is connected with the nut, and the detecting end of the strain detection portion is in contact with the bolt to be detected. Due to the fact that the bolt to be detected is static relative to the bolt to be detected, the axial strain measurement accuracy is improved. Therefore, the calibration device is adopted for calibrating a proportional parameter K, the calibration accuracy of the proportional parameter K can be effectively improved, accordingly pre-tightening force of the bolt can be effectively measured during follow-up bolt installation, and the calibration device has the advantage of being high in 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 Applications(China)
IPC IPC(8): G01L5/00
Inventor 张保山粟金发
Owner ZOOMLION HEAVY IND CO LTD
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