Sheet metal is a kind of processing technology. Up to now, there has not been a complete definition of sheet metal. According to a definition in a foreign professional journal, it can be defined as: sheet metal is a comprehensive cold working process for sheet metal (usually under 6mm), including cutting, punching / cutting / compounding, folding, riveting, splicing, forming (such as automobile body), etc. Its remarkable feature is that the thickness of the same part is the same.
Sheet metal parts have the characteristics of light weight, high strength, conductive (can be used for electromagnetic shielding), low cost, large-scale mass production performance and so on. It has been widely used in the fields of electronic appliances, communications, automobile industry, medical devices and so on. For example, in computer case, mechanical shell, electronic products and so on, sheet metal is an essential part. With the application of sheet metal more and more widely, the design of sheet metal parts has become a very important part in the process of product development. Mechanical 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.
What is sheet metal technology? Generally speaking, the basic equipment of sheet metal process includes shear machine, CNC punching machine / laser, plasma, cutting machine, bending machine, drilling machine and various auxiliary equipment, such as uncoiler, leveler, deburring machine, spot welder, etc. Generally, the most important four steps of sheet metal process are cutting, punching / cutting /, folding / rolling, welding, surface treatment, etc.
Sheet metal is sometimes used as trigger gold. The word comes from English plate metal. Generally, some sheet metal is pressed by hand or die to produce plastic deformation, forming the desired shape and size, and further forming more complex parts through welding or a small amount of machining, such as the chimney commonly used in the family, tin furnace, and automobile shell are sheet metal parts. Sheet metal processing is called sheet metal processing. For example, making chimneys, iron buckets, oil tanks, ventilation pipes, elbows, round places, funnel-shaped, etc. by using plates, the main processes are cutting, bending and buckling, bending and forming, welding, riveting, etc., which requires certain geometric knowledge.
Sheet metal parts are sheet metal parts, which can be processed by stamping, bending, stretching and other means. A general definition is the parts with constant thickness in the process of processing. The corresponding parts are casting parts, forging parts, machining parts, etc. for example, the iron shell outside the car is sheet metal parts, and some cabinets made of stainless steel are sheet metal parts. Modern sheet metal technology includes: filament power winding, laser cutting, heavy processing, metal bonding, metal drawing, plasma cutting, precision welding, roll forming, metal plate bending forming, die forging, water jet cutting, precision welding, etc. The surface treatment of sheet metal parts is also a very important part of the sheet metal processing process, because it can prevent parts from rusting and beautify the appearance of products. The function of surface pretreatment of sheet metal parts is mainly to remove oil, oxide skin, rust, etc. it is to prepare for surface post-treatment, and the latter treatment is mainly to spray (bake) paint, spray plastic and plating antirust layer, etc. In 3D software, Solidworks, UG, Pro / E, SolidEdge, topsolid, CATIA, etc. all have one item of sheet metal parts. It is mainly to get the data (such as unfolding drawing, bending line, etc.) needed for sheet metal processing through the editing of 3D graphics, and to cut for CNC punching machine / laser, plasma, water jet cutting machine / composite machine On machine) and CNC bending machine.
