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High-strength manufacturing process for nut of screw fastener

A technology of screw fastening and manufacturing process, which is applied in the direction of threaded fasteners, bolts, nuts, etc., which can solve the problems of poor spraying and dipping effects, easy to wear, and coating dead ends, so as to improve the safety of use and improve Coating effect, effect of improving wear resistance

Inactive Publication Date: 2022-06-17
江苏古戈尔精密五金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing nuts often need to be coated with wear-resistant paint on the surface to improve strength, but due to the particularity of the inner thread, the existing spraying and dipping effects are poor, prone to coating dead ends, and prone to wear during use , and wear and tear is difficult to be found in time, resulting in various problems often occur in use, resulting in unnecessary economic losses

Method used

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  • High-strength manufacturing process for nut of screw fastener
  • High-strength manufacturing process for nut of screw fastener
  • High-strength manufacturing process for nut of screw fastener

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] see figure 1 , a high-strength manufacturing process for a nut of a screw fastener, comprising the following steps:

[0046] S1, take the raw material of the nut and sequentially carry out smelting, casting, solution treatment and forging to obtain a nut blank, and then perform quenching treatment, tempering treatment and annealing treatment in sequence;

[0047] S2. After cooling, carry out countersinking and chamfering treatment, deburring treatment and then washing in sequence according to the design process size, and then tap the thread according to the design process size, and finally obtain the finished nut;

[0048] S3. Perform heat treatment, aging treatment, tempering treatment on the finished nut in turn, and then carry out pickling and blackening treatment in sequence;

[0049] S4. Prepare the wear-resistant coating in advance, insert the finished nut into the inner coating cylinder, then inject the wear-resistant coating, and use the rotation action of the ...

Embodiment 2

[0058] Unlike in Example 1, see Figure 4 , the outer end of the inner cylinder 3 is also fixedly connected with a plurality of evenly distributed centrifugal sinkers 8, and the centrifugal sinkers 8 are located on the inside of the outer expansion bag 5. After adding the centrifugal sinkers 8, the different rotation speeds of the rotating base 2 can be controlled by the rotation speed. When the speed is high, the centrifugal force of the centrifugal weight 8 is large, so that the pressure on the inner thread area is increased, which can not only squeeze the paint better, but also improve the adhesion effect of the paint on the thread. When the rotation speed is low, the centrifugal force of the centrifugal weight 8 is small. , so as to reduce the pressure on the threaded area, for the paint to flow and replenish, the paint will peel off in the area of ​​poor adhesion, and then add new paint to adhere until the adhesion is good.

[0059] see Figure 5 , the centrifugal weight...

Embodiment 3

[0062] The difference from Example 2 is that the centrifugal weight 8 contained in the single capsule 51 can be eliminated, and by adding nano-magnetic particles and a dispersant in the wear-resistant paint, when the inner cylinder 3 rotates, the nano-magnetic particles are used for the thread position. The scouring effect can deepen the grinding effect of small burrs. At this time, the magnetic suction sheet 7 is taken out. After the grinding, the magnetic suction sheet 7 can be put back to absorb the nano-magnetic particles, so that the paint can be relatively well attached. on the inside thread of the nut.

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Abstract

The invention discloses a high-strength manufacturing process for a nut of a screw fastener, belongs to the technical field of fastener production, and can realize coating of wear-resistant paint on threads on the inner side of the nut through an inner coating cylinder before the nut is formed, so that on one hand, a plurality of nuts can be positioned at the same time, and batch coating treatment is easy to perform; on the other hand, the wear-resistant coating is extruded in an inner side expansion mode, so that the coating can be fully contacted and attached to the inner side threads, meanwhile, the rotating action of the inner coating cylinder is utilized, tiny burrs possibly existing on the inner side threads can be polished, the adhesive strength of the coating can be detected, and the coating quality is improved. Compared with an existing spraying and dip-coating mode, the method has the advantages that the coating effect of the wear-resistant coating on the nut can be improved, so that the wear-resistant strength of the surface is improved, measures can be taken when wear occurs, and the use safety of the nut is improved.

Description

technical field [0001] The invention relates to the technical field of fastener production, and more particularly, to a high-strength manufacturing process for a nut of a screw fastener. Background technique [0002] A nut is a nut, a part that is screwed together with a bolt or screw for fastening. A component that must be used in all production and manufacturing machinery is divided into carbon steel, stainless steel, non-ferrous metals (such as copper), etc. Several types, high-strength bolts need to be used in some special occasions, and high-strength nuts are also required to match the bolts. [0003] The existing nut often needs to be coated with wear-resistant paint on the surface to improve the strength, but due to the particularity of the inner thread, the existing spraying and dipping effects are poor, and the coating dead angle is prone to occur, and it is prone to wear during use. , and wear and tear is difficult to be found in time, resulting in various problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B41/00B05C7/06
CPCF16B41/002B05C7/06
Inventor 葛志松
Owner 江苏古戈尔精密五金科技有限公司