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Bolt surface treatment process

A surface treatment and bolt technology, which is applied in the field of bolt surface treatment technology, can solve the problems of affecting the bolt processing efficiency, taking a long time to remove grease, and incomplete grease removal, etc., and achieve the effect of improving the uniformity of bolts, improving the effect, and simplifying the process

Active Publication Date: 2019-04-02
浙江格力威机械股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the overall performance of the bolts, in addition to optimizing the production process of the bolts, additional processing is required on the surface of the produced bolts; the hot-dip galvanizing process can coat the surface of the bolts with a layer thickness greater than 5 μm Zinc layer, which can improve the corrosion resistance of the bolts, so that the strength of the bolts is improved; but in the hot-dip galvanizing process, the workpiece needs to be cleaned, but the existing hot-dip galvanizing cleaning process is only through the use of water-based Soaking in water with detergent, on the one hand, it takes a long time to remove the grease during the immersion process, which affects the processing efficiency of the bolts; The zinc layer plated on the surface has poor fastness and is easy to fall off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A bolt surface treatment process, comprising the following steps:

[0056] 1) Cleaning. Place the bolts in water containing water-based cleaning agent and perform ultrasonic cleaning. The frequency of the ultrasonic waves is 25KHz, and the power density is set at 0.4W / C. After ultrasonic cleaning, the bolts are rinsed with clean water to remove the water-based cleaning agent on the bolts;

[0057] 2) Pickling, using compound acid to pickle the cleaned bolts, and the temperature during pickling is controlled at 35°C;

[0058] 3) Add additives, soak the pickled bolts in the flux, and add an appropriate amount of explosion-proof agent during the soaking process; the time for the bolts to soak in the flux is 180S;

[0059] 4) Dry and preheat, remove the bolts from the flux, then place the bolts in a nitrogen environment for drying and heat to 130°C;

[0060] 5) Hot-dip galvanizing, melting the zinc metal in the hot-dip galvanizing tank to form a zinc liquid, and then rais...

Embodiment 2

[0066] A bolt surface treatment process, comprising the following steps:

[0067] 1) Cleaning. Place the bolts in water containing water-based cleaning agent and perform ultrasonic cleaning. The frequency of the ultrasonic wave is 38KHz, and the power density is set at 0.9W / C. When cleaning, the water will completely immerse the bolts, which can effectively remove the bolts After ultrasonic cleaning, the bolts are rinsed with clean water to remove the water-based cleaning agent on the bolts;

[0068] 2) Pickling, using compound acid to pickle the cleaned bolts, and the temperature during pickling is controlled at 46°C;

[0069] 3) Add additives, soak the pickled bolts in the flux, and add an appropriate amount of explosion-proof agent during the soaking process; the time for the bolts to soak in the flux is 260S;

[0070] 4) Dry and preheat, remove the bolts from the flux, then place the bolts in a nitrogen environment for drying and heat to 156°C;

[0071] 5) Hot-dip galvan...

Embodiment 3

[0077] A bolt surface treatment process, comprising the following steps:

[0078] 1) Cleaning. Place the bolts in water containing water-based cleaning agent and perform ultrasonic cleaning. The frequency of the ultrasonic wave is 45KHz, and the power density is set at 1.5W / C. When cleaning, the water will completely immerse the bolts. This cleaning can effectively remove the bolts After ultrasonic cleaning, the bolts are rinsed with clean water to remove the water-based cleaning agent on the bolts;

[0079] 2) Pickling, use compound acid to pickle the cleaned bolts, and the temperature during pickling is controlled at 55°C;

[0080] 3) Add additives, soak the pickled bolts in the flux, and add an appropriate amount of explosion-proof agent during the soaking process; the time for the bolts to soak in the flux is 300S;

[0081] 4) Dry and preheat, remove the bolts from the flux, then place the bolts in a nitrogen environment for drying and heat to 190°C;

[0082] 5) Hot-dip ...

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Abstract

The invention discloses a bolt surface treatment process. The bolt surface treatment process comprises the following steps of cleaning, specifically, placing a bolt into water which contains water-based cleaning agent through ultrasonic to clean; acid cleaning, specifically, using complex acid to make the acid cleaning of the bolt after the cleaning process; adding the auxiliary agent, specifically, placing the acid cleaning bolt into an auxiliary plating agent to soak; and drying and preheating, specifically, removing the bolts from the auxiliary plating agent, and then drying the bolts in nitrogen and heat them to 130 to 190 DEG C. According to the bolt surface treatment process, the surface of the bolt is cleaned through ultrasonic, the cleaning ability is strong, and the cleaning efficiency is high; the cleaning processes are simplified; when the bolt is heated in nitrogen gas environment, the surface of the bolt is not change, and the effect of galvanizing on the bolt is improved.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a bolt surface treatment process. Background technique [0002] Bolts are indispensable workpieces in daily life and industrial production. They are widely used in various fields for fixing between parts. They are easy to operate and can achieve efficient fixing of parts; With the rapid development of industry, the requirements for bolts are gradually increasing, especially for outdoor bolts, which require comprehensive advantages such as high strength, good wear resistance and corrosion resistance. [0003] In order to improve the overall performance of the bolts, in addition to optimizing the production process of the bolts, additional processing is required on the surface of the produced bolts; the hot-dip galvanizing process can coat the surface of the bolts with a layer thickness greater than 5 μm Zinc layer, which can improve the corrosion resis...

Claims

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Application Information

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IPC IPC(8): C23C2/06C23C2/34C23C2/02C23C2/26C23G1/08C23G1/04
CPCC23C2/02C23C2/06C23C2/26C23C2/34C23G1/04C23G1/088
Inventor 董服明
Owner 浙江格力威机械股份有限公司
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