The processing steps of sheet metal parts and the eight common problems of sheet metal stamping parts

发布时间：2024-03-31

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 body), 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 by different industries are generally different and are often used as a term of assembly.

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

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 processing steps of sheet metal parts?

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

Sheet metal is sometimes also known as sheet metal, which comes from the English word sheet metal. Generally, some metal sheets are manually or die stamped to produce plastic deformation, forming the desired shape and size, and can be further welded or machined to form more complex parts, such as chimneys, tin stoves, and car casings commonly used in households.

Metal sheet metal processing is called sheet metal processing. For example, using sheet metal to make chimneys, iron drums, oil tanks and kettles, ventilation pipes, large and small elbows, round corners, funnel-shaped shapes, etc., the main processes include cutting, bending, forming, welding, riveting, etc., which require a certain amount of geometric knowledge.

Sheet metal parts are thin sheet metal parts, which can be processed through stamping, bending, stretching and other methods. A general definition is a part whose thickness remains unchanged during the 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 for sheet metal processing and stamping parts processing

1. Burr: During the punching or edge cutting process, there is incomplete residue left, and burrs are generated at the lower part of the steel plate cross-section. Based on the cross-section, when the height of the burrs is above 0.2mm, the iron powder generated will damage the mold and cause convexity and concavity.

2. Convex and concave: The surface of the material is abnormally protruding or concave, which is caused by foreign objects (iron filings, dust) entering the uncoiling line.

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

4. Sliding mark: caused by the sliding of the roller, occurs when suddenly stopped or accelerated.

5. Crushing and destruction of the coil material may result in wrinkling at the edges: The guide rollers on the uncoiling line may experience wrinkling when the gap between the guide rollers on the mold is small, due to the uneven feeding of the coil material.

6. Scratches: The main cause of scratches on parts is sharp scratches or metal dust falling into the mold. Preventive measures include grinding the scratches on the mold and removing metal dust.

7. Bottom cracking: The main cause of bottom cracking of parts is poor plasticity of the material or excessive pressure on the mold edge pressing ring. Preventive measures include replacing the material with better plasticity or loosening the edge pressing ring.

8. Wrinkles on the side walls: The main reason for wrinkles on the side walls of parts is that the thickness of the material is not enough (even thinner ones are allowed) or the upper and lower molds are installed with eccentricity, 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.