Industry News

Sheet metal processing technology knowledge

2021-09-10
What is a sheet metal part? Sheet metal parts are parts produced by a comprehensive cold working process for metal sheets (usually less than 6mm), including shearing, punching/cutting/compounding, folding, welding, riveting, splicing, and forming.
 
Features:
1. Uniform thickness. For a part, the thickness of all parts is the same.
2. Light weight, high strength, electrical conductivity, low cost, and good mass production performance.
 
Processing technology
1. Cut
The equipment of the cutting process is a shearing machine, which can cut a sheet of metal sheet into basic shapes. Advantages: low processing cost; Disadvantages: general accuracy, cutting with burrs, cutting shapes are simple rectangles or other simple straight lines Composition of graphics. 
The unfolded size of the part must be calculated before the cutting process. The unfolded size is related to the bending radius, bending angle, sheet material, and sheet thickness.
 
2. Punch
The equipment of the punching process is a punching machine, which can further process the cut material into shape. Stamping various shapes requires different molds. Common molds have round holes, long round holes, and bosses; the accuracy is higher.
Boss: The material is not removed. Note that the height of the boss is limited, which is related to the material of the board, the thickness of the board, and the angle of the slope of the boss. 
There are many kinds of bosses, including heat dissipation holes, mounting holes and so on. Due to the influence of bending, the distance between the edge of the design hole and the edge of the plate and the bending edge will be restricted.
 
3. Laser cutting 
Processing equipment: laser cutting machine
For the removal of materials that cannot be completed by the cutting and punching processes, or the plates with high hardness that can easily damage the mold, such as rounded corners, or when there is no ready-made mold to stamp the required shape, laser cutting can be used to complete the bending Material molding.
Advantages: cutting without burrs, high precision, can cut any graphics, such as leaves, flowers, etc.; Disadvantages: high process cost.
 
4. Bending
Processing equipment: bending machine, plate bending machine

They can bend or roll the metal sheet into the required shape, which is the forming process of parts; the process of cold pressing the metal sheet by the upper and lower knives of the bending machine to deform the metal sheet to obtain the desired shape is called bending .