Production Process and Application of Sheet Metal Parts

Sheet metal refers to the steel plate with a much smaller thickness than its length and width. Its lateral bending resistance is bad, so it is not suitable for the occasion of transverse bending load. Sheet metal is metal in terms of its material, but because of its special geometric shape and thin thickness, the processing technology of sheet metal components has its particularity. According to the basic processing methods of sheet metal parts, it can be roughly divided into the following categories: blanking, bending, stretching, forming and welding. The structural design of sheet metal structural parts should mainly consider the requirements and characteristics of processing technology. In addition, attention should be paid to the batch size of components.
Sheet metal structural parts are widely used because of the following advantages:

It is easy to deform, so it can be produced by simple processing technology.
Thin plate components are light in weight.

Because of the high surface quality and the small tolerance of thickness dimension, the sheet surface does not need to be processed.

It is easy to cut and weld, can produce large and complex components.

Shape is standard, easy for automatic processing.

Sheet metal processingis also called sheet metal processing, such as making chimneys, barrels, oil tanks, ventilation pipes, elbows, small and small heads, sky circles, funnel shape, etc. with sheet metal. The main processes of sheet metal processing are shearing, bending and buckling edges, bending forming, welding, riveting and so on. However, the technological process of sheet metal parts with different structures and chassis may also be different. The following is a basic technological process of sheet metal industry processing.
Process flow of sheet metal processing: sheet metal parts design→ technical drawing→ drawing development diagram→ blanking→ bending→ riveting→ welding →surface treatment→ wire printing →assembly →packaging and delivery.
The processing steps in sheet metal workshop are: pre-test of products, trial production of products and batch production of products. In the process of trial production, we should communicate with customers in time. After the evaluation of the corresponding processing, we can produce the products in batches.
Sheet metal processing is a key technology for sheet metal technicians to grasp. Sheet metal processing is also an important process for forming sheet metal products. Sheet metal processing includes traditional cutting, blanking, bending and forming methods and process parameters. It also includes the structure and process parameters of various cold stamping dies, working principles and operation methods of various equipment, as well as new stamping technology and process. These are sheet metal designers need to be familiar with the support, and be able to flexibly apply to the actual work, do a good job in the design and processing of sheet metal parts.

What are the common surface treatment processes in sheet metal processing?

Electroplating: In the electroplating bath, charged ions are attached to the product surface under the action of electric field, forming a coating. It is attributed to chemical changes.
Powder spraying: Powder is polarized, under the action of electric field, uniformly adhered to the surface of products with opposite polarity. It belongs to physical change.
Electrophoresis: Under the action of anode and cathode, charged paint ions move to the surface of products and accumulate to form coatings. Attributed to chemical changes。
Immersion: The product is heated, and the heated metal is combined with the melted material around it to form a surface material of certain thickness. Belong to physical changes.

Varieties of Electroplating in Sheet Metal Processing
Zinc plating
1. Cyanide zinc plating
2. Zincate galvanizing
3. Chloride zinc plating
4 Sulfate galvanizing
The galvanizing process will pollute the environment. Although it is widely used and cheap, the galvanizing products do not conform to ROHS, so try not choose the galvanizing products as far as possible in product design.

Chromium plating
The principle of chromium plating in sheet metal processing is the same as that of zinc plating. Compared to traditional zinc plating, chromium coating has strong corrosion resistance, 7 - 10 times as much as zinc plating, and has beautiful surface, but high cost.

Now the most advanced chromium plating process is called DACROMET, which is called Dakoro. It is a revolutionary high-tech metal surface treatment process with no pollution in the whole process.
Technological characteristics of immersion moulding: widely used: rich color, excellent protection, excellent cold resistance and heat preservation, acid and alkali resistance.