Introduction to Sheet Metal Sheet metal is a comprehensive cold working process for sheet metal (thickness is usually less than 6mm), including blanking, bending, stretching, forming, forging and riveting. Its remarkable feature is that the thickness of the same part is the same. Sheet metal has the characteristics of light weight, high strength, conductivity (which can be used for electromagnetic shielding), low cost and good mass production performance. At present, sheet metal has been widely used in electronic and electrical appliances, communication, automobile industry, medical devices and other fields. For example, sheet metal is an essential part in computer chassis, mobile phone and MP3. With the more and more extensive application of sheet metal, the design of sheet metal parts has become a very important part in the process of product development. Product design engineers must master the design skills of sheet metal parts, so that the designed sheet metal can not only meet the requirements of product function and appearance, but also make the manufacturing of stamping die simple and low cost. Common processes of sheet metal include: Stamping, press brake forming, punching, bending, curling, decambering, deep drawing, expanding, hemming and sealing, hydroforming, incremental sheet forming or ISF, ironing, laser cutting Photochemical machining (PCM or photochemical machining), perforating, roll forming, rolling, spinning, water jet cutting, wheeling, etc. Unlike injection molded parts, a complex sheet metal part often needs different process combinations to produce smoothly, which is very similar to metal cutting. Therefore, a complex sheet metal part often needs multiple sets of equipment and molds. As a mechanical engineer, you need to understand the main manufacturing process of sheet metal parts. Because each production mode has different requirements for sheet metal.
What is the technological process of sheet metal processing? What are the characteristics and precautions of sheet metal processing
1. Sheet metal processing design and draw the part drawing of its sheet metal parts, also known as three views,The function of sheet metal processing is to express the structure of its sheet metal parts in the form of drawings.
2. The sheet metal processing draws the unfolded views, It is to unfold a complex structural part into a flat part.
b. Sheet Metal Punching is to punch the flat structure with a punching machine after one or more steps of unfolding the part. The advantage is that the labor time is short, the efficiency is high, and the processing cost can be reduced.
It is usually used for mass production.
c. CNC punching. When CNC blanking, the first thing to do is to write a CNC machining program. That is to say, we use programming software to write the developed graphics into a program that can be recognized by the CNC
machine. Let it punch out the structural shape of its flat piece by following these steps step by step on top of the iron plate.
4.Sheet metal processing flanging and tapping, Flanging, also known as draft hole, is to pull a small hole into a slightly larger hole, and then tap the draft hole. This increases its strength and avoids slipping. Generally used for sheet metal processing with thinner thickness. When the plate thickness is larger, such as 2.0, 2.5 or more, we can tap directly without threading.
5.Sheet metal processing stamping processing, Sheet metal processing generally adopts punching, punching, punching, punching, tearing, punching and other methods. In order to achieve the purpose of processing, process-ing requires corresponding molds to complete the operation. Convex shell mold, tear forming mold, etc. Process flow: Introduction to sheet metal processing process.
6.Sheet metal processing pressure Riveting, Sheet metal processing commonly used pressure riveting studs, pressure riveting nuts, pressure riveting screws, etc., the pressure riveting method is generally completed by punching or hydraulic riveting machine, and riveted to the sheet metal parts.
JAPAN AMADA Fiber Laser Cutting Machine, 3000W, Machining range: 1.55m*3m. Cutting Thickness: 10mm thickest for Iron Sheet, 6mm Thickest for Stainless Steel Sheet;
JAPAN MITSUBISHI Laser Cutting Machine ML35CF-R, 4500W, Machining range:1.5m*3m. Cutting Thickness:20mm thickest for Iron Sheet, 10mm Thickest for Stainless Steel Sheet.
7.Sheet metal processingBending is the folding of a two-dimensional flat part into a three-dimensional part. Its machining requires a folding bed and corresponding bending dies to complete the operation. It also has a certain bending sequence, the principle of which is not to interfere with the next knife. Folds, which create disturbing rear folds.
8.Sheet metal processing and welding, Sheet metal processing welding is the welding of multiple parts together for processing purposes, or the welding of the welds of a single part to increase its 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 based on actual needs and materials. Generally speaking, carbon dioxide gas shielded welding is used for iron plate welding; argon arc welding is used for aluminum plate welding; robot welding is mainly used for large parts and long welds. When used, such as cabinet welding, robot welding can be used, which can save many tasks and improve work efficiency and welding quality.
9. Sheet metal processing surface treatment.The surface treatment of sheet metal processing generally includes phosphating film, electroplating color zinc, chromate, baking paint, oxidation, etc. Phosphating film is generally used for cold-rolled sheets and electrolytic sheets. Its main function is to coat a protective film on the surface of the material to prevent oxidation; secondly, it can enhance the adhesion of paint. Electroplating color zinc is generally treated with cold-rolled sheet; the surface treatment of aluminum plate and aluminum profile is generally treated with chromate and oxidation; the choice of specific surface treatment method is determined according to customer requirements. gather. The so-called assembly is to combine multiple components in a certain way to make it a complete project.
What is the technological process of sheet metal processing? What are the characteristics and precautions of sheet metal processing? Sheet metal processing should be noted that the protection of the material is not scratched. Assembly is the final step in completing the project. If the material is unusable due to scratches, it will need to be reworked and reworked. Email us by clicking here.