Looseness-preventing and seizure-preventing sleeve thread connecting method and assembly

Abstract

The invention discloses a looseness-preventing and seizure-preventing sleeve thread connecting method and an assembly; the assembly comprises a bolt and nut connecting assembly; the method comprises the following steps: firstly forming 2-8 conical notches at one end of the nut, conducting radial extruding on the nut of the end, provided with the conical notches in order to enable the nut to shrink, namely a section of conical hole thread with gradually reducing diameter is formed in the internal thread of one end of the nut, the nut has the looseness-preventing function when being connected with the bolt by using the conical hole thread; and meanwhile, firstly plating a layer of zinc-nickel alloy layer on the surface of the thread of the nut, and then dip-coating a layer of molybdenum disulfide layer, in this way, the nut has high-corrosion-resistance and seizure-preventing functions when being connected with the bolt. The method and the assembly not only have the advantages of being capable of effectively preventing a fastener from the phenomenon of seizure, rotation, rusting and breaking during use, but also have the following advantages that the structure is simple, the manufacturing cost is low, the weight is light, the service is safe and reliable, the assembly is convenient and fast to disassemble and maintain, etc.

Description

technical field [0001] The invention relates to an anti-loosening and anti-seizure ferrule screw connection method and components, belonging to the technical field of screw connection fasteners. Background technique [0002] In the mechanical design of high-speed motion such as aircraft, rockets, missiles, and high-speed rail, the requirements for fasteners are very high and very precise. At the same time high performance fasteners are very expensive. In particular, many high-end fasteners that can prevent loosening and seizure must be made of expensive materials, thus greatly increasing the cost of production and use. Ordinary fasteners have problems such as high assembly requirements, poor maintainability, inability to reassemble and disassemble, heavy weight, poor anti-loosening and anti-seizure performance, which are not enough for connections that require frequent disassembly and maintenance. The disadvantages are troublesome disassembly, inconvenient maintenance, sho...

AI Technical Summary

Problems solved by technology

At the same time, high-performance fasteners are very expensive

In particular, many high-end fasteners that can prevent loosening and seizure must be made of expensive materials, thus greatly increasing the cost of production and use

Ordinary fasteners have problems such as high assembly requirements, poor maintainability, inability to reassemble and disassemble, heavy weight, poor anti-loosening and anti-seizure performance, which are not enough for connections that require frequent disassembly and maintenance. The disadvantages are troublesome disassembly, inconvenient maintenance, short service life, unreliable work and low efficiency.

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