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Paints protection method before drawing and forming sheet metal parts

A technology of sheet metal parts and deep drawing, which is applied in the direction of coating, liquid coating device on the surface, surface pretreatment, etc., to achieve the effect of solving the adhesion of paint film and scratches of parts, convenient operation and cost saving

Inactive Publication Date: 2009-05-06
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the international cooperation and technical exchange of subcontracted production, the present invention adopts the protective medium that meets the specific process requirements, controls the optimum paint viscosity value by selecting the appropriate thinner and dilution ratio, and obtains the optimum paint film thickness value from It fundamentally solves the problem of surface scratches in the stamping and deep drawing forming process of sheet metal parts, thereby solving the bottleneck problem of surface polishing and trimming process in the later production of parts, and improving the quality of stamping and deep drawing forming of sheet metal parts

Method used

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  • Paints protection method before drawing and forming sheet metal parts
  • Paints protection method before drawing and forming sheet metal parts
  • Paints protection method before drawing and forming sheet metal parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Use organic solvents to degrease the sheet metal parts of the CFM56-7 engine fairing, and then dry the parts at room temperature.

[0035] Add the thinner to the paint (PROPACO R) and stir evenly. The amount of the thinner added is 15-17s after adding the thinner.

[0036] Use spraying equipment to evenly spray the diluted paint on the surface of the parts. When spraying, use clean and dry compressed air treated by an oil-water separator. The compressed air pressure is 0.2MPa, and the spraying angle is 45~90°. The spraying distance is 200mm~ 300mm; Dry the sprayed parts, and the drying conditions are natural drying at room temperature for 24 hours, and the thickness of the paint after curing is 15 microns.

[0037] After spraying protection, the CFM56-7 engine fairing sheet metal parts are formed by stamping and deep drawing, and their appearance is like Figure 6 Shown. With the use of domestic paint protection technology to stamp the surface of the part after deep drawing...

Embodiment 2

[0039]Use organic solvents to degrease the sheet metal parts of the CFM56-7 engine fairing, and then dry the parts at room temperature.

[0040] Add the thinner to the paint (PROPACO R) and stir evenly. The amount of the thinner added is 15-17s after adding the thinner.

[0041] Use spraying equipment to evenly spray the diluted paint on the surface of the parts. When spraying, use clean and dry compressed air treated by an oil-water separator. The compressed air pressure is 0.4MPa, and the spraying angle is 45~90°. The spraying distance is 200mm~ 300mm; Dry the sprayed parts under the conditions of natural drying for 24 hours at room temperature, and the cured paint has a thickness of 13 microns.

[0042] After spraying protection, the CFM56-7 engine fairing sheet metal parts are formed by stamping and deep drawing, and their appearance is like Figure 7 Shown. With the use of domestic paint protection technology to stamp the surface of the part after deep drawing (such as Figure...

Embodiment 3

[0044] Use organic solvents to degrease the sheet metal parts of the CFM56-7 engine fairing, and then dry the parts at room temperature.

[0045] Add the thinner to the paint (PROPACO R) and stir evenly. The amount of the thinner added is 15-17s after adding the thinner.

[0046] Use spraying equipment to evenly spray the diluted paint on the surface of the parts. When spraying, use clean and dry compressed air treated by an oil-water separator. The compressed air pressure is 0.6MPa, and the spraying angle is 45~90°. The spraying distance is 200mm~ 300mm; Dry the sprayed parts under the conditions of natural drying for 24 hours at room temperature, and the thickness of the paint after curing is 10 microns.

[0047] After spraying protection, the CFM56-7 engine fairing sheet metal parts are formed by stamping and deep drawing, and their appearance is like Figure 8 Shown. Compared with the surface of the parts after stamping and deepening formed by using domestic paint protection te...

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Abstract

The invention relates to a method for coating a lacquer for protection before sheet metal component stretching, which belongs to the material technical field. The method includes the following steps of: (1) degreasing a component to be protected by adopting an organic agent; (2) adding a thinner, X-1, into a PROPACO R lacquer and then uniformly stirring the mixture; and (3) uniformly coating the diluted lacquer on the surface of the component by adopting a spraying machine, wherein, the lacquer is coated in a manner that the thickness of the solidified lacquer ranges from 10 microns to 15 microns; and drying the coated lacquer. The component coated by adopting the method of the invention is treated with punching and stretching tests, surface scuffing is obviously reduced to a great extent after the formation of the component, and no deep scuffing happens; the actual operation time for stretching each component and for trimming and correcting the surface is obviously reduced; and the method not only improves the product quality, but also improves the machining speed, and simultaneously solves the problem of lacquer film agglutination and component scuffing.

Description

Technical field [0001] The invention belongs to the technical field of materials, and particularly relates to a paint protection method for sheet metal parts before deep drawing and forming. Background technique [0002] Sheet metal is a comprehensive cold working process for metal sheets (usually below 6mm), including shearing, punching / cutting / compounding, folding, welding, riveting, splicing, forming (such as car body), etc., and its notable feature is the same The parts have the same thickness. Sheet metal parts are thin sheet metal parts, which are parts that can be processed by stamping, bending, and deep drawing. [0003] Deep drawing, also called drawing or rolling, is a method of punching and processing a hollow part with an open flat blank after punching with a die. The deep-drawing process can be used to make cylindrical, stepped, tapered, spherical, box-shaped and other irregularly shaped thin-walled parts. If it is matched with other stamping processes, it can also p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/02B05D7/24B05D3/00
Inventor 贾东晨李伟红王辉陈桂荣杨景伟杨树余刘春伟张晨申童
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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