Precision Sheet Metal Processing is a comprehensive processing technology for sheet metal, including cutting, stamping/laminating, folding, welding, riveting, joining and casting. Its obvious characteristic is uniform thickness. Modern sheet metal manufacturing technologies include: filament power winding, laser cutting, rework, metal connection, metal wire drawing, plasma cutting, precision welding, rolling, sheet metal bending, forging, water jet cutting, precision welding, etc.

　　The characteristics of precision sheet metal processing technology can be summarized as: high degree of automation, high processing precision, simple operation, high speed, and high efficiency. Specifically, there are the following points: 1. High power density of sheet metal processing: The workpiece absorbs the rapid heating after sheet metal processing and melts or vaporizes, even high melting point, high hardness, and brittle materials can be sheet metal processed; 2. Sheet metal processing beam is easy to control: Easy to combine with precision measurement technology, precision machinery and electronic computers, thus achieving high automation and high processing precision; 3. Sheet metal processing is convenient and flexible: Robots can be used for sheet metal processing, in harsh environments or places where others cannot reach; 4. Wide range of applications of precision sheet metal processing: The beam divergence angle of sheet metal processing can be less than 1 milliradian, the spot diameter can be as small as micrometers, and the action time can be as short as nanoseconds and picoseconds. At the same time, the continuous output power of high-power Sheet Metal Processing can reach kilowatts to tens of kilowatts, so sheet metal processing is suitable for large-scale material processing, and also suitable for precision micro-processing.

　　In modern mechanical manufacturing industry, there are several methods to connect two or more parts or components together, such as bolt connection, rivet connection, bonding and welding. The first two connection methods are mechanical and detachable. However, welding is the connection between the atoms of two objects, forming a bond, and the connection cannot be disassembled after connection. In actual production, the choice of precision sheet metal connection method should consider both its reliability and economy, and be familiar with the characteristics of various precision sheet metal connection methods.

　　 Precision Sheet Metal There are many precision sheet metal welding methods used in industrial production. According to the characteristics of the welding process, they can be divided into three categories: 1. Fusion welding: The common characteristic of this welding method is that the joint of the workpiece is heated to a molten state by local heating, and then melted and combined after solidification. Common arc welding and gas welding belong to this category. 2. Pressure welding: The common characteristic of this welding method is that a certain pressure is applied during welding, regardless of whether the welding is heated or not, so that the two bonding surfaces are in close contact, promoting the knotting effect between atoms, so that a firm connection is obtained between the two workpieces. Resistance welding and friction welding belong to this category. 3. Brazing: Similar to fusion welding, it can also obtain a firm connection, but there is an essential difference between the two. In this method, the solder with a melting point lower than that of the workpiece is heated together with the workpiece, so that the solder melts, but the workpiece itself does not melt. The liquid solder wets the workpiece, fills the gap between the joints, diffuses with the workpiece, and achieves bonding with the solid-state welded metal, and connects with each other after solidification.