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? Wwhat are the characteristics and precautions of sheet metal processing
Sheet metal processing processes may be different, Generally which doesn’t exceed the following points:
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.
3. Sheet Metal Process and Cutting There are many ways of sheet metal processing and cutting, mainly as follows:
a. Shear Cutting. Use the clipper to cut the length, width, and size of the unfolded graphic. If there is punching and chamfering, turn the punch to combine the punching and chamfering.
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.
d. Laser blanking is to use laser cutting to cut the structural shape of its flat parts on an 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.