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Method for coating chemical milling protection adhesive film during chemical milling

A technology of chemical milling and protective glue, applied in the field of chemical milling, can solve problems such as the inability to achieve the smooth and complete design requirements of the part milling structure, the weak bonding force between the glue film and the substrate, and the separation of the glue film from the substrate. effect of cycle, increased thickness, and neat appearance

Inactive Publication Date: 2016-02-10
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method, there will be excess protective glue sticking around the protected area, and the adhesive force between the reapplied film and the substrate is not strong. When milling again, there will be a phenomenon that the film will separate from the substrate, and the parts cannot be milled. Sleek and complete design requirements, in severe cases, parts will be scrapped

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The conventional chemical milling protective glue is placed in the air for 50 minutes, dipped in the solution with a brush and lifted to a height of 200mm, and used as a recoating protective glue for refilling.

[0033] Brush evenly on the surface of the exposed substrate protective film, and let it dry in the air for 1 minute. Brush the protective glue evenly on the surface of the torn protective film, press and compress the damaged protective film in its original position, and let it dry in the air for 60 minutes.

[0034] Using the above process formula, recoat the protective glue according to the above method, and then process it according to the titanium alloy chemical milling process. The surface structure of the part is complete, the recoated protective glue film has no peeling phenomenon, and the part is qualified to be sent out.

Embodiment 2

[0036] The conventional chemical milling protective glue is placed in the air for 30 minutes, dipped in the solution with a brush and lifted to a height of 200mm, and used as a recoating protective glue for refilling.

[0037] Brush evenly on the surface of the exposed substrate protective film, and let it dry in the air for 30 seconds. Brush the protective glue evenly on the surface of the torn protective film, press and compress the damaged protective film in its original position, and let it dry in the air for 60 minutes.

[0038] Using the above process formula, recoat the protective film according to the above method, and then process it according to the titanium alloy chemical milling process. The surface structure of the parts is complete, and the recoated protective film has no peeling phenomenon.

Embodiment 3

[0040] 5000mm can be dissolved with 300mL protective glue 2 The discarded dry protective film is used as a recoating protective glue solution for refilling.

[0041] Brush evenly on the surface of the exposed substrate protective film, and let it dry in the air for 1 minute. Brush the protective glue evenly on the surface of the torn protective film, press and compress the damaged protective film in its original position, and let it dry in the air for 90 minutes.

[0042] Using the above process formula, recoat the protective film according to the above method, and then process it according to the titanium alloy chemical milling process. The surface structure of the parts is complete, and the recoated protective film has no peeling phenomenon.

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Abstract

The invention relates to the field of chemical milling, in particular to a method for coating a chemical milling protection adhesive film during chemical milling. The method comprises the steps of protection adhesive liquid preparation, surface cleaning of a workpiece to be coated, protection adhesive coating and post-processing of coating. Firstly, protection adhesive liquid capable of shortening the airing time and increasing the thickness of the adhesive film is prepared, and compared with protection adhesive liquid sold on the market, the protection adhesive liquid has the characteristics that the concentration of paint film components is higher, the viscosity is higher, and thinning agent components can be evaporated rapidly. Then, an original damaged protection adhesive film formed by laser engraving is adopted, and the integrity of apparent shape and the accuracy of dimension of pieces are guaranteed after chemical milling is completed. By utilizing the theory that homogeneous substances of organic solvent are soluble, a metal base body and the damaged protection adhesive film are coated with the protection adhesive liquid, and the bonding force between the base body and the damaged protection adhesive film is improved. By means of the method for coating the chemical milling protection adhesive film during chemical milling, the airing time after coating is shortened, the thickness of the coated adhesive film is increased, and the bonding force between the base body and the adhesive film is good.

Description

technical field [0001] The invention relates to the field of chemical milling, in particular to a method for recoating a chemical milling protective adhesive film during chemical milling. Background technique [0002] In the process of chemical milling of titanium alloy parts, with the increase of the depth of chemical milling, the side erosion phenomenon is serious. When the bonding force between the protective film and the substrate does not reach sufficient strength, the film will appear peeling. Chemical milling The bath solution will infiltrate into the substrate along the peeling, milling away the parts that originally need to be protected, causing over-corrosion. Traditionally, the gap between the substrate and the protective film is filled with a brush dipped in protective glue. Using this method, there will be excess protective glue sticking around the protected area, and the adhesive force between the reapplied adhesive film and the substrate is not strong. When m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/04
Inventor 郭春光王辉杨树林赵贵全孙畅
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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