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Chemical milling protective glue dip-coating method

A technology of protective glue and dip coating, which is applied in the direction of coating, liquid coating device on the surface, etc., can solve the problems of long production cycle, serious personal hazards, and uneven surface thickness of the film, so as to enhance production capacity and improve manufacturing Level, improve the effect of chemical milling quality

Inactive Publication Date: 2020-11-17
SHENYANG AIRCRAFT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In chemical milling production, most of the coating of protective glue is done by manual brushing and spraying. Manual operation has uneven surface thickness of the film, easy generation of air bubbles, low glue utilization rate, long production cycle, and low production efficiency. Disadvantages such as low efficiency, greater harm to people, and difficulty in waste gas treatment

Method used

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  • Chemical milling protective glue dip-coating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 It is a dipping schematic diagram of the chemical milling protective glue dipping method provided in the embodiment of the present invention. see figure 1 , in the present embodiment, chemical milling protective glue dip-coating method comprises:

[0025] (1) Deployment of glue: Before starting each shift, the viscosity of the protective glue should be adjusted to 15S (the measuring viscosity cup is: EZ 5#Zahn cup), and the viscosity should be adjusted with tetrachlorethylene.

[0026] (2) Pre-processing of the workpiece:

[0027] a) Light emission: at room temperature, in 300g / L nitric acid solution (ρ=1.42g / mL), treat for 2min;

[0028] b) Alkali corrosion: the temperature of the bath solution is controlled at 40°C, 20g / L sodium hydroxide solution, and treated for 5 minutes;

[0029] c) Light emission after alkali corrosion: at room temperature, in 300g / L nitric acid solution (ρ=1.42g / mL), until the workpiece returns to a bright surface;

[0030] d) Wash...

Embodiment 2

[0038] A kind of chemical milling protective glue dipping method, it comprises the following steps:

[0039] (1) Glue preparation: Before each shift starts, the viscosity of the protective glue needs to be adjusted to 40S (the measuring viscosity cup is: EZ 5#Zahn cup), and the viscosity is adjusted with tetrachlorethylene.

[0040] (2) Pre-processing of the workpiece:

[0041] a) Light emission: at room temperature, in 500g / L nitric acid solution (ρ=1.42g / mL), treat for 0.5min;

[0042] b) Alkali corrosion: the temperature of the bath solution is controlled at 55°C, 35g / L sodium hydroxide solution, and treated for 2 minutes;

[0043] c) Light emission after alkali corrosion: at room temperature, in 500g / L nitric acid solution (ρ=1.42g / mL), until the workpiece returns to a bright surface;

[0044] d) Warm water washing: treat with warm water at 50°C for 1 min;

[0045] e) Washing in cold water: treat in cold water at room temperature for 1 min.

[0046] (3) Hanging: The wo...

Embodiment 3

[0052] A kind of chemical milling protective glue dipping method, it comprises the following steps:

[0053] (1) Deployment of glue: Before starting each shift, the viscosity of the protective glue should be adjusted to 30S (the measuring viscosity cup is: EZ 5#Zahn cup), and the viscosity should be adjusted with tetrachlorethylene.

[0054] (2) Pre-processing of the workpiece:

[0055] a) Light emission: at room temperature, in 400g / L nitric acid solution (ρ=1.42g / mL), treat for 1min;

[0056] b) Alkali corrosion: the temperature of the bath solution is controlled at 50°C, 30g / L sodium hydroxide solution, and treated for 3.5min;

[0057] c) Light emission after alkali corrosion: at room temperature, in 400g / L nitric acid solution (ρ=1.42g / mL), until the workpiece returns to a bright surface;

[0058] d) Warm water washing: treat with warm water at 40°C for 1.5 minutes;

[0059] e) Washing in cold water: treat in cold water at room temperature for 1.5 minutes.

[0060](3) ...

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PUM

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Abstract

The invention provides a chemical milling protective glue dip-coating method which comprises the steps of glue solution preparation, workpiece pretreatment, hanging, glue dipping, dripping, leveling,drying and the like. By implementing the chemical milling protective glue dip-coating method, the problems that a glue film is not uniform, many leakage points exist and human factors have a large influence due to manual glue brushing and spraying in chemical milling are effectively solved, the quality of the chemical milling glue film is effectively guaranteed, and the chemical milling quality ofaircraft parts is improved. Meanwhile, the process of the chemical milling protective glue dip-coating method is used for the first time in the same domestic industry, fills a blank in the industry,improves the manufacturing level of a chemical milling process, plays an important role in enhancing the production capacity and innovation capacity of a company, and has a good promotion effect on improving the manufacturing level of aviation and spaceflight in China.

Description

technical field [0001] The invention belongs to the technical field of surface processing, and relates to a chemical milling protective glue dip coating method, more specifically, to a chemical milling protective glue coating method suitable for aluminum alloy parts. Background technique [0002] Chemical milling (referred to as chemical milling) refers to exposing the part of the metal material to be processed to a specific chemical medium for corrosion, and protecting the part that does not need to be processed. A special processing technology for shape and size. In chemical milling production, most of the coating of protective glue is done by manual brushing and spraying. Manual operation has uneven surface thickness of the film, easy generation of air bubbles, low glue utilization rate, long production cycle, and low production efficiency. It has disadvantages such as low efficiency, great harm to people, and difficulty in waste gas treatment. Contents of the inventio...

Claims

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Application Information

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IPC IPC(8): B05D1/18C23F1/04
CPCB05D1/18C23F1/04
Inventor 殷世坤解二伟张雪锋李哲
Owner SHENYANG AIRCRAFT CORP