Titanium Alloy Notched Bolts

Abstract

The invention discloses a titanium alloy notch bolt, which comprises a bolt head (1) and a screw rod (2); the upper part of the bolt head (1) is hexagonal, and the lower part of the bolt head (1) is a cylinder; the cylinder The diameter is larger than the diameter of the hexagonal outer circle, and when the bolt head is in contact with the loaded surface, the cylinder acts as a gasket; the screw rod (2) has a notch (3) in the middle. In the notch bolt of the present invention, a notch (3) is designed in the middle of the screw rod (2). While satisfying the static connection performance, the separation power provided by the pyrotechnic device to the notch at the moment of separation realizes reliable and efficient separate. Simultaneously, the notch bolt of the present invention adopts an integrated design, and the cylinder at the lower part of the bolt head (1) plays the role of a gasket, which reduces the loading surface of the bolt head and the contact surface of the gasket, increases the surface contact stiffness, and makes the concave Port bolts improve separation performance by increasing the stiffness of the contact surface under high dynamic shock loads.

Description

Technical field [0001] The present invention belongs to the field of spacecraft structure, and in particular, the present invention relates to a bolt that can complete the connection and separation of dual functions. Background technique [0002] During the rocket launch, in the atmosphere, the rocket rectification provides a basic closed and temperature-stable space to avoid flying pneumatic heating to produce ablation, and guarantees a good pneumatic shape, reducing aerodynamic resistance, increasing flight stability. After flying out of the atmosphere, the Rocket needs to throw off the rectifier, reducing the rocket itself, and increasing the launch capacity. Therefore, a structure for connection is required during the rocket flight. In the atmosphere, the entire flow cover is connected to a whole; in addition to the atmosphere, the bolt will be bolted under the conditions of the fireworks. Interrupt to achieve a whole flow shield. When separated, the separation displacement p...

AI Technical Summary

Problems solved by technology

However, the existing connection is designed as a common bolt, which can only meet the connection reliability, its breaking performance is unknown, and the separation method is uncontrollable, which cannot meet the connection and separation performance requirements of the two halves of the fairing.

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