Calibration apparatus for relation between pretightening force and pretightening moment, and calibration method thereof

Abstract

The invention, which belongs to the field of the aircraft separating apparatus, particularly relates to a calibration apparatus for a relation between a pretightening force and a pretightening moment, and a calibration method thereof. The apparatus comprises a device capable of providing a torsion load, a torsional force sensor sleeve, a pressure sensor tool, a separating nut sleeve, and a data processing device. According to the method, a torsional force is applied to the separating apparatus; a torsional force sensor and a pressure sensor are used for reflecting a pretightening moment applied to the separating apparatus and a pretightening force generated by the separating apparatus in real time; and thus calibration of the relation between the pretightening force and the pretightening moment of the separating apparatus is completed. The method and the apparatus have the following beneficial effects: a curve of a relation between a pretightening force and a pretightening moment can be calibrated continuously and be drawn automatically; the separating nut and the connecting bolt are consistent with the motion state of the connected structure relatively when the pretightening moment is applied to the separating apparatus, so that the calibration result is more real. The strain gauge leads are arranged outside and twisting of the leads with the separating apparatus can be prevented.

Description

technical field [0001] The invention belongs to the field of aircraft separation devices, and in particular relates to a calibration device and a calibration method for the relationship between pre-tightening force and pre-tightening torque. Background technique [0002] Separation nut separation devices are widely used in the connection and separation of various sections of rockets, missiles and other aircraft or instruments and equipment due to their advantages of small separation impact, no pollution, and ground inspection. [0003] The separation nut separation device is generally composed of a separation nut, a connecting bolt and a catcher, and has the functions of connecting, carrying and unlocking. The separation device of the separation nut realizes its connection function by the thread pair between the separation nut and the connecting bolt, and applies a pretightening moment to the separation device at one end of the separation nut or the connection bolt according...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a pre-tightening force to solve the problems in the prior art that holes need to be dug on the simulated connected structure, and the wires of the strain gauges are easily wound on the connecting bolt rods, causing the wires to break and the calibration data to be discontinuous. Calibration device and calibration method for relationship with preload torque

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