Sheet metal is a comprehensive cold working process for metal sheets (usually below 6mm), including cutting, punching/cutting/composite, folding, welding, riveting, splicing, forming (such as automotive bodies), etc. Its obvious feature is the uniform thickness of the parts. The products processed through sheet metal technology are called sheet metal parts. The sheet metal parts referred to in different industries are generally different and are often used as a term for assembly.

Sheet metal parts have the characteristics of light weight, high strength, conductivity (which can be used for electromagnetic shielding), low cost, and good mass production performance. They have been widely used in fields such as electronics, communications, automotive industry, medical equipment, etc. For example, sheet metal parts are an essential component in computer cases, mobile phones, MP3 players, etc.

With the increasing application of sheet metal, the design of sheet metal parts has become an important part of the product development process. Mechanical engineers must master the design skills of sheet metal parts proficiently, so that the designed sheet metal not only meets the requirements of product function and appearance, but also makes stamping die manufacturing simple and cost-effective. So, what are the steps for sheet metal processing?

Usually, the three important steps in sheet metal factories are cutting, punching/cutting, and folding.

Sheet metal, also known as sheet metal, is a term derived from the English word sheet metal. It generally refers to the plastic deformation of some metal sheets through manual or mold stamping, forming the desired shape and size, and further forming more complex parts through welding or a small amount of mechanical processing. For example, chimneys, iron furnaces, and car shells commonly used in households are sheet metal parts.

Sheet metal processing is called sheet metal processing. For example, using sheet metal to make chimneys, iron drums, oil tanks and pots, ventilation ducts, elbow heads, round corners, funnel-shaped structures, etc., the main processes are cutting, bending edge buckles, bending forming, welding, riveting, etc., which require a certain amount of geometric knowledge.

Sheet metal parts are thin metal parts that can be processed through stamping, bending, stretching, and other methods. A general definition is-

Parts with constant thickness during processing Correspondingly, there are forged parts, forged parts, machined parts, etc. For example, the outer iron shell of a car is a sheet metal part, and some kitchen utensils made of stainless steel are also sheet metal parts.

Common problems and reasons in sheet metal processing and stamping parts processing

1. Burr: During the punching or edge cutting process, incomplete excess material is left, and burrs are generated at the lower part of the steel plate section. Based on the section, when the height of the burrs is 0.2mm or more, the iron powder generated will damage the mold and produce protrusions and depressions.

2. Convex concave: Abnormal protrusion or depression on the surface of the material is caused by foreign objects (iron filings, dust) mixed in the unwinding line.

3. Roller printing: caused by foreign objects adhering to the cleaning or feeding rollers (occurring at a fixed pitch), in general, the roller printing foreign objects on the sheet can be removed.

4. Sliding print: It occurs when the roller slides and comes to a sudden stop or acceleration.

5. The breakage and destruction of the coil material may result in wrinkling at the edges: The guide rollers on the unwinding line may experience wrinkling when the gap between the guide rollers on the mold is small, as the coil material is fed into the non yielding balance.

6. Scratches: The main reason for scratches on parts is that there are sharp scratches or metal dust falling into the mold. Preventive measures include grinding the scratches on the mold and removing the metal dust.

7. Bottom cracking: The main reason for the bottom cracking of parts is poor plasticity of the material or excessive compression of the mold edge ring. Preventive measures include replacing the material with better plasticity or loosening the edge ring.

8. Wrinkles on the side wall: The main reason for wrinkles on the side wall of parts is that the thickness of the material is not enough (relatively small thickness is allowed to be thin) or there is eccentricity during the installation of the upper and lower molds, resulting in a large gap on one side and a small gap on the other side. The preventive measures are to replace the material immediately and readjust the mold.