Method and structure for preventing bolt from being irregularly broken when exceeding specified stress value

Abstract

The invention discloses a method and a structure for preventing a bolt from being irregularly broken when exceeding a specified stress value. A circle of grooves are manufactured on a screw rod of a bolt in advance, and a maximal stress value in the groove positions is a specified maximal stress value of the bolt; stress values of other parts of the bolt are adjusted to be larger than the specified maximal stress value, the bolt can be broken in the preset groove position when exceeding the specified stress value, thereby the aim for preventing the bolt from being irregularly broken when exceeding the specified stress value can be achieved. The invention ensures that two parts of connected machine bodies can be freely separated during breaking generation so that other parts are not broken, and has the advantages of simple structure, easy implementation, reliable and safe effect, and the like. The invention can be popularized and applied to various mechanical industries and has favorable economic and social benefits.

Description

technical field [0001] The invention relates to a method and a structure for preventing random fracture of a bolt when the force value exceeds a specified value, and belongs to the technical field of bolt production. Background technique [0002] Since the advent of the machinery industry, bolts have been produced. Bolts have a long history and have become a widely used fastener, such as railways, bridges, electric power, mining, aircraft, tanks, automobiles and other industries. But the bolts in the current prior art can only play a fastening role. During the use of these bolts, when the force of the bolts reaches or exceeds the specified force value range, the bolts will break, and the broken parts of the bolts are Random and irregular, this kind of fracture often causes damage to the two parts of the body connected by bolts and cannot be repaired; especially in some special applications, it is required that when the bolts break, the two parts of the body connected by bolt...

AI Technical Summary

Problems solved by technology

But the bolts in the current prior art can only play a fastening role. During the use of these bolts, when the force of the bolts reaches or exceeds the specified force value range, the bolts will break, and the broken parts of the bolts are Random and irregular, this kind of fracture often causes damage to the two parts of the body connected by bolts and cannot be repaired; especially in some special applications, it is required that when the bolts break, the two parts of the body connected by bolts must be able to Free disengagement, so that other parts are not damaged, but because the broken parts of these bolts in the prior art are random and irregular, it cannot be reliably guaranteed that the two parts of the body that are connected can be freed when the bolt breaks

Therefore, when the bolts in the prior art are in use, their use effect is still not ideal enough, and they still cannot meet the needs of use.

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