1. Design and draw the part diagram of its sheet metal parts, which is used to express the structure of its sheet metal parts in the form of drawings.
2. Draw an unfolding diagram, which means unfolding a complex structural part into a flat piece.
3. Cutting
There are many ways to cut materials, mainly the following:
a. Scissor cutting
Use scissors to cut out the dimensions of the unfolded image. If there is punching or corner cutting, then transfer the punching machine to combine with the mold punching and corner cutting to form.
b. Punch cutting
Using a punch press, the flat structure of the unfolded parts is punched into shape in one or more steps on the sheet metal. Its advantages are short working hours, high efficiency, and can reduce processing costs, which are often used in batch production.
c. NC CNC cutting
When NC cutting, the first step is to write a CNC machining program. It is to use programming software to write the unfolded diagram into a program that can be recognized by NC machining machines. Let it follow these programs step by step on an iron plate and punch out the structural shape of its flat piece.
d. Laser cutting
Using laser cutting method, cut the structural shape of an iron plate or pipe.
4 Flanging tapping
Flipping, also known as drilling, is the process of drawing a slightly larger hole from a smaller base hole and then tapping it onto the drilling hole. This can increase its strength and avoid slipping teeth. Generally used for sheet metal processing with relatively thin plate thickness. When the plate thickness is large, such as 2.0, 2.5, and above.
5. Punching machine processing
The general punching machine processing methods include punching and cutting corners, punching and cutting materials, punching convex shells, punching and tearing, and hole drawing to achieve the processing objectives. Its processing requires corresponding molds to complete the operation. There are convex hull molds for punching convex hulls, and tear forming molds for punching and tearing.
6. Press riveting
The commonly used riveting methods include riveting bolts, riveting nuts, riveting screws, etc. The riveting process is usually completed by a punch or hydraulic riveting machine to rivet them onto the sheet metal parts.
7. Bending
Bending is the process of folding a 2D flat piece into a 3D part. Its processing requires a bending machine and corresponding bending molds to complete the operation. It also has a certain bending order, and its principle is to fold first for the next cut that does not interfere, and then fold later for those that will interfere.
8. Welding
Welding is the process of welding multiple parts together to achieve the purpose of processing, or welding the edges of individual parts to increase their strength. The processing methods generally include CO2 gas shielded welding, argon arc welding, spot welding, robot welding, etc. The selection of these welding methods is determined based on actual requirements and materials.
9. Surface treatment
Surface treatment generally includes phosphating film, electroplating of colorful zinc, chromate, baking paint, powder coating, oxidation, etc. Phosphate coating is generally used for cold-rolled and electrolytic plates, and its main function is to coat a protective film on the surface of the parts to prevent oxidation; Furthermore, it can enhance the adhesion of its baking paint.
10. Assembly
The so-called assembly is to assemble multiple parts or components together in a certain way, making them a complete material. One thing to pay attention to is the protection of the parts and not to scratch or damage them. Assembly is the final step in the completion of a material. If the material is scratched and cannot be used, it needs to be reworked, which will waste a lot of processing time and increase the cost of the material. Therefore, special attention should be paid to the protection of the material.