阅读说明：本技术 一种螺栓和自锁螺母组件 (Bolt and self-locking nut assembly ) 是由 虞玉华 袁浩 郭绕龙 胡庆宽 殷银银 关悦 娄起 叶瑞 于 2020-06-04 设计创作，主要内容包括：本发明涉及一种螺栓和自锁螺母组件,包含螺栓和自锁螺母；螺栓和自锁螺母两个中的一个表面涂覆有防腐纳米层,另一个的表面电镀有电镀防腐层,电镀防腐层的外侧有润滑层。防腐纳米层、电镀防腐层都可以提高其内部基体在环境中的抗腐蚀能力,电镀防腐层外的润滑层可以避免其内部的电镀防腐层在螺纹旋合过程中损坏并稳定螺栓与自锁螺母装配的安装力矩,本发明的螺栓和自锁螺母组件,自锁螺母与螺栓表面结构合理,在使用环境中搭配使用时具有较好的耐腐蚀能力,使用寿命较长。(The invention relates to a bolt and self-locking nut assembly, which comprises a bolt and a self-locking nut; one surface coating in bolt and two self-locking nut has anticorrosive nanometer layer, and the surface electroplating of another has the electroplating anticorrosive coating, and there is the lubricating coating in the outside of electroplating anticorrosive coating. The anti-corrosion nano layer and the electroplating anti-corrosion layer can improve the anti-corrosion capability of the internal matrix in the environment, and the lubricating layer outside the electroplating anti-corrosion layer can prevent the internal electroplating anti-corrosion layer from being damaged in the screwing process of the threads and stabilize the mounting torque of the bolt and the self-locking nut assembly.)

1. A bolt and self-locking nut assembly comprising:

a bolt and a self-locking nut;

it is characterized in that the utility model is characterized in that,

one surface coating in bolt and two self-locking nut has anticorrosive nanometer layer, and the surface of another has the electroplating anticorrosive coating, and there is the lubricating coating in the outside of electroplating anticorrosive coating.

2. The bolt and self-locking nut assembly of claim 1 wherein the surface of the bolt is coated with an anti-corrosion nano-layer and the surface of the self-locking nut is provided with an electroplated anti-corrosion layer and a lubricating layer.

3. The bolt and self-locking nut assembly of claim 1 or 2 wherein the electroplated corrosion protection layer is a cadmium electroplating layer.

4. A bolt and self-locking nut assembly as claimed in claim 1 or claim 2 wherein the lubricating layer comprises a layer of molybdenum disulphide.

5. The bolt and self-locking nut assembly of claim 4 wherein the lubricating layer further comprises a layer of cetyl alcohol on the outside of the molybdenum disulfide layer.

6. The bolt and self-locking nut assembly of claim 5 wherein the layer of cetyl alcohol is formed by soaking the bolt or self-locking nut and then curing the soaked bolt or self-locking nut by air drying.

7. The bolt and self-locking nut assembly of claim 1 or 2 wherein the bolt and self-locking nut are constructed of a stainless steel material.

Technical Field

The invention relates to a bolt and self-locking nut assembly.

Background

With the development of ocean resources and the development of the ocean industry, devices or equipment such as ocean platforms, ships and warships and the like are widely applied, and fastener components such as bolts, self-locking nuts and the like are used as the most basic and common connection modes and are widely applied to equipment such as the ocean platforms, the ships and the like for mechanical connection. However, the marine environment is severe, most metal materials are difficult to bear the corrosion of seawater and the corrosion of marine atmosphere, and many fasteners are exposed in the marine environment for a long time and are seriously corroded, so that the fasteners are difficult to disassemble, the connection strength is reduced, even the fasteners fail, and the service life is short. Therefore, it is highly desirable to provide a bolt and self-locking nut assembly having improved corrosion resistance and long service life.

Disclosure of Invention

The invention aims to provide a bolt and a self-locking nut assembly which are good in corrosion resistance and long in service life.

The bolt and self-locking nut assembly adopts the following technical scheme:

a bolt and self-locking nut assembly comprising:

a bolt and a self-locking nut;

one surface coating in bolt and two self-locking nut has anticorrosive nanometer layer, and the surface of another has the electroplating anticorrosive coating, and there is the lubricating coating in the outside of electroplating anticorrosive coating.

Has the advantages that: the anti-corrosion nano layer and the electroplating anti-corrosion layer can improve the anti-corrosion capability of the internal matrix in the environment, the lubricating layer outside the electroplating anti-corrosion layer can prevent the internal electroplating anti-corrosion layer from being damaged in the screwing process of the threads, and the assembling torque of the bolt and the self-locking nut is kept stable.

Further, the surface coating of bolt has anticorrosive nanometer layer, and the surface of auto-lock nut is equipped with electroplating anticorrosive coating and lubricant film. When the surface of the self-locking nut is provided with the anti-corrosion nano layer, the self-locking process is formed between the bolt and the self-locking nut, the anti-corrosion nano layer is easily damaged due to the deformation of the closing-up structure of the self-locking nut, and the anti-corrosion nano layer is arranged on the surface of the bolt, so that the integrity of the anti-corrosion nano layer is protected.

Furthermore, the electroplating anticorrosive layer is an electroplating cadmium layer. The cadmium plating layer is relatively stable and has strong corrosion resistance, and is particularly suitable for marine environment.

Further, the lubricating layer comprises a molybdenum disulfide layer. The molybdenum disulfide is not easy to fall off except being used as a solid lubricant, and is also suitable for high-temperature and high-pressure environments.

Further, the lubricating layer also comprises a hexadecanol layer positioned outside the molybdenum disulfide layer. The hexadecanol layer can solidify the molybdenum disulfide layer, so that the molybdenum disulfide layer is prevented from falling off, and the hexadecanol layer also has certain lubricity, so that the molybdenum disulfide layer can be prevented from being damaged in the screwing process of the threads, and the stable mounting torque between the bolt and the self-locking nut can be kept.

Further, the hexadecanol layer is formed by soaking bolts or self-locking nuts and then airing and curing the bolts or the self-locking nuts. The formation process of the hexadecanol is simple and convenient to process.

Further, the bolt and the self-locking nut are made of stainless steel materials. When the stainless steel material is used for the fastener, the corrosion resistance and the acid resistance are better than those of common metal materials.

Drawings

FIG. 1 is a schematic view of a bolt in a specific embodiment 1 of the bolt and self-locking nut assembly of the present invention (the corrosion inhibiting nanolayer is not shown in the figure);

FIG. 2 is a schematic view of a self-locking nut of embodiment 1 of the bolt and self-locking nut assembly of the present invention (the electroplated corrosion protection layer and the lubricating layer are not shown in the figure);

in the figure: 1-a bolt; 2-external thread; 3-self-locking nut; 4-a closing structure; 5-internal thread.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

Specific embodiment 1 of the bolt and self-locking nut assembly of the present invention:

the bolt and self-locking nut assembly comprises a bolt 1 and a self-locking nut 3, wherein an external thread 2 is arranged on the bolt 1, and an internal thread 5 is arranged on the self-locking nut, so that the bolt 1 and the self-locking nut 3 can be screwed and matched through threads. Self-locking nut 3 still is equipped with binding off structure 4 along axial one end opening part, and binding off structure 4 is the quadrangle from the side visual angle to make bolt 1 close up 4 structural deformation after closing off 3 soon to a certain degree with self-locking nut, prevent bolt 1 and 3 pine of self-locking nut and take off through mutual extrusion, the frictional force of 4 inside threads of binding off structure and bolt external screw thread 2, reach the auto-lock effect. In other embodiments, the cuff structure may have other configurations, such as other non-circular configurations, such as an oval shape when viewed from a side view.

In order to achieve a better corrosion prevention effect, the bolt 1 and the self-locking nut 3 are made of stainless steel materials, and the stainless steel materials are 17-4PH stainless steel with the trade mark of 0Cr17Ni4Cu4 Nb. The surface of the bolt 1 is coated with an anti-corrosion nano-layer, and the anti-corrosion nano-layer can effectively improve the anti-corrosion capability of the bolt 1 inside the anti-corrosion nano-layer in the environment. The surface of the self-locking nut 3 is provided with an electroplating anticorrosive layer and a lubricating layer positioned outside the electroplating anticorrosive layer. The electroplating anti-corrosion layer is an electroplating cadmium layer, the electroplating cadmium layer is relatively stable in property and good in corrosion resistance, the corrosion resistance of the self-locking nut 3 inside the electroplating anti-corrosion layer can be improved, and the electroplating anti-corrosion layer is particularly suitable for being used in a marine environment. The lubricating layer comprises a molybdenum disulfide layer and a hexadecanol layer, the molybdenum disulfide layer is coated on the outer side of the cadmium electroplating layer, and the molybdenum disulfide layer has good lubricity and can effectively prevent the cadmium electroplating layer from being damaged in the process of screwing the threads. The hexadecanol layer is located the outside on molybdenum disulfide layer, and hexadecanol is better emollient, can produce the guard action to its inside molybdenum disulfide layer, prevents that molybdenum disulfide layer from droing when using, and the hexadecanol layer is located self-locking nut 3's outermost surface, can also stabilize bolt and self-locking nut's installation moment.

According to the invention, the bolt with the anticorrosion nano layer and the self-locking nut with the electroplating anticorrosion layer and the lubricating layer arranged on the outer side are matched for use, on one hand, the bolt and the self-locking nut are both provided with the outer layer with an anticorrosion effect, so that the anticorrosion performance is better, on the other hand, the lubricating layer is arranged on the outer side of the nut, so that the electroplating anticorrosion layer on the inner side can be protected, the anticorrosion effect is further enhanced, the mounting torque of the bolt and the self-locking nut can be ensured in the screwing process of the threads, the bolt and the self-locking nut are smoothly mounted, and the connection is firm. The self-locking nut and the bolt have reasonable surface structure, and the self-locking nut assembly have better corrosion resistance and longer service life when matched for use.

The processing steps of the bolt in the bolt and self-locking nut component are as follows:

upsetting to obtain a semi-finished bolt workpiece, performing vacuum solution treatment, performing vacuum aging treatment, performing external dimension finish machining, processing external threads, performing surface treatment, spraying an anticorrosive nano coating, drying and curing.

The detailed processing steps of the bolt are as follows:

step 1: preparing a stainless steel bar or a disc round bar as a base material, and performing upsetting processing on the base material through an upsetting die to obtain a semi-finished bolt workpiece.

Step 2: and carrying out vacuum solution treatment on the semi-finished bolt to eliminate local hardening and uneven hardness caused by upsetting deformation of a semi-finished bolt workpiece.

And step 3: and carrying out vacuum aging treatment to obtain a semi-finished bolt workpiece with certain strength.

And 4, step 4: and performing finish machining on the outline dimension of the semi-finished bolt workpiece, and machining external threads to obtain the finished bolt workpiece.

And 5: and (3) surface treatment, namely removing stains on the surface of the finished bolt workpiece, performing electro-polishing pretreatment on the finished bolt workpiece after drying in the air, removing the rough surface of the finished bolt workpiece, improving the surface smoothness, spraying a layer of anticorrosive nano coating on the finished bolt workpiece, drying, and finishing bolt processing.

The processing steps of the self-locking nut in the bolt and self-locking nut assembly are as follows:

upsetting to obtain a semi-finished nut workpiece, finishing the external dimension, processing internal threads and a closing structure, carrying out vacuum solution treatment, carrying out vacuum aging treatment, carrying out surface treatment, electroplating a cadmium electroplated layer, coating a molybdenum disulfide layer, and coating a hexadecanol layer on the outer side of the molybdenum disulfide layer.

The detailed processing steps of the self-locking nut are as follows:

step 1: preparing a stainless steel bar or a disc round material as a base material, and performing upsetting processing on the base material through an upsetting die to obtain a semi-finished nut workpiece.

Step 2: and performing finish machining on the outline dimension of the semi-finished nut workpiece, after machining an internal thread, extruding and deforming a straight opening part on the peripheral surface of the semi-finished nut workpiece to form a closing-up structure with a quadrangular cross section, and thus obtaining the finished self-locking nut workpiece.

And step 3: and carrying out vacuum solution treatment on the finished self-locking nut workpiece to eliminate local hardening and uneven hardness caused by upsetting deformation of the finished self-locking nut workpiece so as to carry out subsequent processing.

And 4, step 4: and carrying out vacuum aging treatment on the finished self-locking nut workpiece to obtain the self-locking nut workpiece with certain strength.

And 5: surface treatment, namely removing stains on the surface of the self-locking nut workpiece and drying the self-locking nut workpiece; electroplating a cadmium electroplating layer on the surface of the self-locking nut to prevent the self-locking nut from being corroded, coating a molybdenum disulfide layer outside the cadmium electroplating layer to protect the cadmium electroplating layer from being damaged in the process of screwing threads, coating a hexadecanol layer outside the molybdenum disulfide layer to cure the molybdenum disulfide layer to prevent the molybdenum disulfide layer from falling off, and keeping a certain stable installation torque when the self-locking nut and the bolt are screwed, wherein the hexadecanol layer is formed by soaking the bolt or the self-locking nut and then drying and curing, and the self-locking nut is processed.

The bolt and the self-locking nut assembly processed and manufactured through the processing steps are mutually screwed, assembled and disassembled for 15 times and subjected to a neutral salt spray test, the duration time of the neutral salt spray test of the bolt and the self-locking nut assembly on the surface without corrosion is more than or equal to 96 hours, and the bolt and the self-locking nut assembly have good corrosion resistance and long service life.

According to the bolt and self-locking nut assembly provided by the invention, the laboratory limit corrosion resistance verification is passed, the bolt is screwed in and out of the self-locking nut for 5 cycle periods, and is placed in a salt spray test box to undergo 1500h corrosion after being wrenched and examined according to the loading torque given by HB7595, and the test result is far beyond the requirement of 96h salt spray on corrosion prevention. Meanwhile, the assembly has been preliminarily tested in 2019 on equipment in units such as medium ship heavy industry and the like, and is free of corrosion in 6 months. The application state is good at present.

Compared with other anticorrosive coatings comprehensively from the aspects of technical advantages and disadvantages, cost, performance indexes, productivity and the like, the anticorrosive nano-coating in the component has the advantages that the corrosion resistance is obviously improved, the cost is saved by about 70 percent, and the productivity is improved by about 2 times; it has better corrosion protection potential and market promotion value.

Specific embodiment 2 of the bolt and self-locking nut assembly of the present invention:

different from the embodiment 1, the electroplating anti-corrosion layer is an electroplating zinc-nickel alloy layer, and the electroplating zinc-nickel alloy layer has better corrosion resistance and is suitable for severe industrial environment and severe marine environment.

Specific embodiment 3 of the bolt and self-locking nut assembly of the present invention:

different from the embodiment 1, the lubricating layer comprises a graphite layer and a hexadecanol layer, and the graphite layer also has a certain lubricating effect and good chemical stability.

Specific embodiment 4 of the bolt and self-locking nut assembly of the present invention:

different from the embodiment 1, when the bolt and the self-locking nut assembly is used in an environment with higher temperature, the hexadecanol layer is easy to fall off due to the lower hexadecanol melting point, so that the hexadecanol layer is not arranged outside the self-locking nut in the environment.

Specific embodiment 5 of the bolt and self-locking nut assembly of the present invention:

different from the embodiment 1, the surface of the self-locking nut is provided with an anti-corrosion nano layer, and the surface of the bolt is provided with an electroplating anti-corrosion layer and a lubricating layer positioned on the outer side of the electroplating anti-corrosion layer.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.