How to deal with sheet metal parts?

Because the surface of some sheet metal parts cannot prevent rust and corrosion, it is very necessary to carry out effective surface treatment on the sheet metal parts. Surface treatment of sheet metal parts can increase the service life of the product in harsh environments, or achieve specific surface effects or functions.

Here is the content list:

l Common surface treatment methods of sheet metal parts.

l Process flow of sheet metal processing.

l Application fields of sheet metal parts

Common surface treatment methods of sheet metal parts

1. Drawing

The so-called sheet metal drawing is to place the sheet metal parts between the upper and lower wheels of the wire drawing machine. An abrasive belt is attached to the wheel, which is driven by the motor to let the sheet metal parts pass through the upper and lower abrasive belts to draw traces on the surface of the material. Depending on the abrasive belt, the thickness of the traces is different, and the main function is to beautify the appearance. Generally, the surface treatment of drawing is considered for sheet metal parts made of aluminum. In addition, wire drawing is also called rubbing.

2. Sandblasting

The sand particles are hit on the surface of the sheet metal part by the wind of the sandblasting machine, forming a dense pit on the surface of the sheet metal part. The main function is to remove the dirt on the surface of the sheet metal part and increase the adhesion of the surface of the sheet metal part. Prepare for subsequent surface treatment methods.

3. Baking paint, powder spraying

The most well-known is car paint. By spraying, high-temperature baking, etc., a layer of paint of various colors is sprayed on the surface of the sheet metal to beautify the appearance and increase the corrosion resistance of the sheet metal. It is a common surface treatment method. Generally, there are two types of liquid baking varnish and powder baking varnish, of which powder baking varnish is the most common. The surface of the baking varnish is non-conductive. Baking varnish is not allowed in areas with EMC requirements. Main technical indicators: color difference, film thickness, and gloss.

4. Electroplating

Through a chemical reaction, a layer of other metal is attached to the surface of the sheet metal to increase the corrosion resistance of the metal and achieve a certain beautification effect. It is a commonly used surface treatment method, such as electro galvanized, electroplated nickel Wait. Mainly plated with colorful zinc, blue and white zinc, black zinc, and chrome plating. (The picture below shows the galvanized sheet)

5. Anodizing

The metal on the surface of the sheet metal is oxidized to form a dense protective film on the surface of the sheet metal to increase the corrosion resistance of the sheet metal. Generally, there are two methods of chemical oxidation and anodization. It is a commonly used surface treatment method, usually with primary color anodizing and black anodizing.

Process flow of sheet metal processing

According to the difference in the structure of sheet metal parts, the process flow can be different, such as blanking.

The cutting methods mainly include the following methods:

① Shearing machine: It is a simple piece of material that uses a shearing machine to cut strips. It is mainly used for mold blanking and forming preparation. The cost is low, and the accuracy is less than 0.2, but it can only process strips or blocks with no holes and no corners. material.

② Punch: The punch is used to punch the flat parts after the sheet metal parts are unfolded on the sheet metal parts in one or more steps to form various shapes of materials. Its advantages are short working hours, high efficiency, high precision, and low cost. , It is suitable for mass production, but molds must be designed.

③ NC CNC blanking, when NC blanking, you must first write the CNC machining program about the sheet metal parts and use the programming software to write the drawn sheet metal parts into a program that can be recognized by the NC number drawing processing machine. These programs punch out sheet metal parts of various shapes on the plate one step at a time, but the structure is affected by the tool structure, the cost is low, and the accuracy is 0.15.

④ Laser cutting is the use of laser cutting to cut the structure and shape of sheet metal parts on a large flat plate. Like NC cutting, laser programs need to be written. It can download various complex shapes of sheet metal parts, and the cost is high. , The accuracy is less than 0.1.

⑤ Sawing machine: mainly use aluminum profiles, square tubes, drawing tubes, round bars, etc., with low cost and low precision.

Application fields of sheet metal parts

Sheet metal parts are widely used in food equipment, automation equipment, auto and motorcycle accessories, pharmaceutical equipment, instrumentation, prop display, logistics equipment, and other fields.

At last

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