Method for solving zinc powder removal problem of galvanized fingerprint-resistant plate stamping television backboard part

Abstract

The invention discloses a method for removing zinc powder from a galvanized fingerprint-resistant plate stamped television backboard part, which is characterized in that a fingerprint-resistant passivation film on the surface of strip steel is fully dried and cured by controlling the drying temperature of a post-treatment tower after the galvanized fingerprint-resistant plate is passivated, the dyne value is greater than 40, the surface wetting effect is better, and the anti-dezincification effect is better. And meanwhile, a good lubricating effect (low dynamic friction coefficient) is achieved, the surface roughness (Ra) of the finished strip steel is controlled to be 0.80-1.40 microns, and the phenomenon of zinc powder removal in the stamping process can be effectively avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of steel surface coatings, and in particular relates to a method for solving the problem of zinc powder removal when punching a television back panel component with a galvanized fingerprint-resistant plate. Background Art

[0002] With the rapid economic development and the continuous improvement of people's material life, my country has become the world's largest home appliance manufacturing base, and it is also a major exporter of home appliances. Home appliances are sold all over the world. With the continuous development of modern industrial technology, energy conservation and environmental protection have become major issues of common concern to the whole society. Chromium-free, fingerprint-resistant, passivated galvanized products are increasingly attracting attention from various industries. The home appliance and automobile industries are key pillar industries in my country. With the continuous improvement of their product grades, the demand for galvanized sheets is constantly increasing. Environmentally friendly passivation products have been widely used in the home appliance industry, such as electrical outer panels, TV back panels, etc. During the stamping process of the TV back parts of the Baosteel galvanized fingerprint-resistant sheet, a large amount of zinc powder appeared around the stamping mold. The accumulated zinc powder adhered to the mold, causing chrome marks to be left on the subsequent stamping plate surface, resulting in an increase in the scrap rate. Figure 1 , which seriously affects the appearance quality and further affects the market share of Baosteel products. In order to solve the defect of dezincification powder in the stamping process, we have carried out a series of research.

[0003] The existing literature and patent research are as follows:

[0004] The document "Pure zinc-coated steel sheet with good resistance to dezincification powder and surface quality, its production method and application" was searched, and a manufacturing method for non-passivated galvanized sheet for automobiles was written. The chemical composition and supporting process design were used to avoid the appearance of needle-shaped leakage points with a diameter of 0.10-1.00μm on the surface. At the same time, by designing the finishing liquid concentration and high-pressure water process design, the bottom of the surface finishing pits is ensured to be smooth and free of mechanical damage. Even if the zinc layer falls off during plastic deformation during stamping, it will not accumulate inside the mold and pollute the mold. It is quite different from the research content of this patent. This patent is a galvanized sheet with fingerprint-resistant passivation treatment, and its purpose is to make the passivation liquid more firmly bonded to the surface of the strip.

[0005] The search document "A hot-dip galvanized automobile sheet stamping dezincification optimization method, device and storage medium" mainly describes a hot-dip galvanized automobile sheet stamping dezincification optimization method, device and storage medium, the method includes the steps of: setting manufacturing parameters according to the model of the stretched skin outer panel for buses; optimizing the manufacturing parameters by using genetic algorithms; establishing an air knife distance parameter model; establishing a roller curve equation; manufacturing the stretched skin outer panel for buses according to the manufacturing parameters, the air knife distance parameter model and the roller curve equation, which does not belong to the same category as the research direction and content of this patent.

[0006] The invention is an effective method for solving the problem of zinc powder removal when a galvanized fingerprint-resistant plate is used to stamp parts of a television back panel.

[0007] This paper studies the galvanized fingerprint-resistant plate after passivation, and then passes it through a post-treatment tower for drying and cooling, so that the fingerprint-resistant passivation film on the surface of the strip is fully dried and cured, the dyne value is greater than 40, the surface wetting effect is good, and at the same time it has a good lubrication effect (low dynamic friction coefficient). Therefore, it is necessary to reasonably control the drying temperature of the post-treatment tower so that the fingerprint-resistant film is fully cured, the temperature is controlled in the range of 90-130℃, and the surface roughness of the strip after finishing is controlled in Ra: 0.8-1.4μm, which can effectively solve the phenomenon of zinc powder removal during stamping. Summary of the invention

[0008] The purpose of the present invention is to provide a method for solving the problem of zinc powder removal in punching TV back panel parts with galvanized fingerprint-resistant plates. By controlling the drying temperature of a post-treatment tower after the passivation of the galvanized fingerprint-resistant plates, the fingerprint-resistant passivation film on the surface of the strip steel is fully dried and solidified, the dyne value is greater than 40, the surface wetting effect is better, and a good lubrication effect (low dynamic friction coefficient) is achieved. At the same time, the surface roughness (Ra) of the strip steel after finishing is controlled at 0.80-1.40 μm, which can effectively solve the problem of zinc powder removal in the stamping process.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0010] The invention discloses a method for solving the problem of zinc powder removal in punching TV back panel parts with galvanized fingerprint-resistant plates. The drying temperature of a post-processing tower is controlled at 90-130 DEG C, and the roughness of the strip steel is controlled at 0.80-1.40 μm.

[0011] Furthermore, the dyne value reaches 40 or more.

[0012] Furthermore, the galvanized steel strip runs at a speed of 100 m / min, a drying temperature of 105°C, the dyne value of the strip surface is measured to be 43, and the roughness of the strip is 1.03 μm.

[0013] Furthermore, the method is used to improve the curing effect of the passivation film.

[0014] Furthermore, the products manufactured according to the present invention are in good stamping condition after being processed and stamped by users, without dezincification powder defects, and meet the user's use requirements.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are: BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is the stamping dezincification powder defect;

[0018] Figure 2 is the drying temperature of the post-processing tower;

[0019] Figure 3 It is a TV drama back panel component. DETAILED DESCRIPTION

[0020] The purpose of the present invention is to develop a fingerprint-resistant passivated sheet material that meets the needs of users in combination with the needs of users. By exploring the drying temperature of the galvanized fingerprint-resistant passivation film, the combination of the surface roughness of the strip steel after light finishing and the passivation film, the dyne value needs to reach above 40, and the roughness of the strip steel is controlled at 0.80-1.40μm. The wettability and adhesion of the surface passivation film reach a certain level, thereby ensuring the stability and reliability of the product during the stamping process.

[0021] The film-forming process of the anti-fingerprint passivation liquid refers to the process in which the coating changes from liquid to amorphous solid coating after being coated on the substrate surface. There are many factors that affect the film-forming process. The dominant factors are the intrinsic properties of the coating such as the composition structure, polymer particle diameter, and film-forming aids. In addition, there are also external environmental factors such as temperature and time. The general coating drying process can be artificially divided into the approaching process, the resin fusion process, and the resin cross-linking process.

[0022] Through the test mode, it was found that the drying temperature of the post-treatment tower was between 80℃ and <90℃, and the zinc powder was seriously removed during the stamping process. In order to improve the curing effect of the passivation film, the drying temperature of the post-treatment tower was controlled in the range of 90℃-130℃, and the roughness of the strip was controlled in the range of 0.80-1.40μm, and the stamping effect was good. Figure 1 And Table 1.

[0023] Table 1 Post-treatment tower drying temperature and surface conditions during stamping

[0024]

[0025] Example Analysis

[0026] Implementation:

[0027] The running speed of the galvanized steel strip is 100m / min, the drying temperature is 105℃, the dyne value of the steel strip surface is measured to be 43, and the roughness of the steel strip is 1.03μm.

[0028] Stamping effect:

[0029] The products manufactured according to the present invention are processed by the user into stamping parts such as Figure 2 As shown, the stamping condition is good, there is no dezincification powder defect, and it meets the user's requirements.

[0030] In summary, according to the secondary process control, the performance indicators and formability of this product meet the user requirements, and it has been supplied in batches without any adverse feedback from users.

[0031] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for solving the problem of zinc powder removal from galvanized fingerprint-resistant plate stamping TV back panel parts, characterized in that: The drying temperature of the post-treatment tower is controlled at 90℃-130℃, and the roughness of the strip is controlled at 0.80-1.40μm.

2. The method for solving the problem of zinc powder removal from galvanized fingerprint-resistant sheet stamping TV back panel parts according to claim 1, characterized in that: The dyne value reaches above 40.

3. The method for solving the problem of zinc powder removal in punching TV back panel parts with galvanized fingerprint-resistant plate according to claim 1 is characterized in that: The running speed of the galvanized steel strip is 100m / min, the drying temperature is 105℃, the dyne value of the strip surface is measured to be 43, and the roughness of the strip is 1.03μm.

4. The method for solving the problem of zinc powder removal in punching TV back panel parts with galvanized fingerprint-resistant plate according to claim 1 is characterized in that: This method is used to improve the curing effect of the passivation film.

5. The method for solving the problem of zinc powder removal when punching TV back panel parts with galvanized fingerprint-resistant plate according to claim 1 is characterized in that: The products manufactured according to the present invention are in good stamping condition after being processed and stamped by users, without dezincification powder defects, and meet the use requirements of users.

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