Sheet metal processing steps and the eight common problems of sheet metal stampings

Sheet metal is a comprehensive cold working process for sheet metal (usually below 6mm), including shearing, punching/cutting/compositing, folding, welding, riveting, splicing, forming (such as car body). The obvious feature is that the same part thickness is common. The products processed by the sheet metal process are called sheet metal parts. Sheet metal parts referred to by different industries are generally different, and are often used for the name of the assembly.

Sheet metal parts are characterized by light weight, high strength, electrical conductivity (can be used for electromagnetic shielding), low cost, and large-scale mass production performance. They are widely used in electronics, communications, car industry, medical equipment, etc., for example, In computer cases, mobile phones, and MP3s, sheet metal parts are an integral part.

With the increasing use of sheet metal, the planning of sheet metal parts has become an important part of the product development process. Mechanical engineers must be proficient in the planning skills of sheet metal parts, so that the planned sheet metal is satisfied with the product. The functions and appearance requirements make the stamping die simple to manufacture and low in cost.

Sheet metal processing

Usually, the three most important processes in a sheet metal factory are shearing, punching, cutting, and folding.

Sheet metal is sometimes used for sheet metal. The word comes from sheet metal. Generally, some metal sheets are stamped by hand or die to plastically deform them to form the desired shape and size, and can be further welded or a small amount of machinery. Processing constitutes more messy parts, such as the chimneys commonly used in homes, tin furnaces, and car shells are all sheet metal parts.

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Sheet metal processing is called sheet metal processing. For details, such as the use of sheet metal to manufacture chimneys, iron drums, oil tanks, ventilation pipes, elbows, rounds, rounds, funnels, etc. The first steps are shearing, bending, bending, zigzag forming, welding, riveting, etc. There must be a lot of common sense.

Sheet metal parts are thin-plate hardware, which is a part that can be processed by stamping, zigzag, stretching, etc. A general definition is -

Parts with constant thickness during processing. Corresponding to castings, forgings, machined parts, etc., for example, the outer iron shell of the car is a sheet metal part, and some kitchen utensils made of stainless steel are also sheet metal parts.

Common problems and causes of sheet metal processing stamping parts processing

1. Glitch: During the process of punching or trimming, there is no residual material left. The burr is broken under the section of the steel plate. Based on the cross-section, when the burr height is above 0.2mm, the iron powder will damage the mold and cause cracks. . 2. Concave and concave: The material appearance is abnormally raised or collapsed, which is caused by the incorporation of foreign matter (iron filings, dust) on the unwinding line. 3. Roller printing: The cleaning roller may cause the foreign matter attached to the feeding roller (with a fixed pitch). Under normal circumstances, the roller can be removed from the roller. 4. Sliding print: caused by the slippage of the roller, which may suddenly occur when it is stopped. 5. Crepe breakage or perhaps edge wrinkling: the guide roll of the unwinding line or perhaps the wrinkling of the gap of the guide roll on the mold is caused by the unwinding of the feed. 6. Scratches: The primary cause of scratches on the parts of the attack. There are sharp scratches on the mold or metal dust falling into the mold. Preventing measures is to repair the scratches on the mold and remove metal dust. 7. Bottom cracking: The primary cause of cracking at the bottom of the attack part is that the material is poorly plasticized or the die presser ring is over-tightened. The prevention measures are to replace the plastic-good material or to relax the crimp ring. 8. Wrinkles on the side wall: The main reason for the wrinkles on the side wall of the attack part is that the thickness of the data is not enough (slightly small thickness is allowed to be thin) or the upper and lower molds are eccentric when installed, resulting in a large gap on one side and a small gap on the other side. Preventive measures are to replace the data and re-adjust the mold.