Coated steel plate (color coated steel plate) is a material widely used in the fields of construction, home appliances, transportation, and other areas, with good corrosion resistance, aesthetics, and processing performance. However, during sheet metal processing, scratches on the surface of coated steel plates are easy to occur due to improper operation or equipment use, affecting the appearance and service life of the product. Therefore, how to effectively avoid surface scratches on coated steel plates during sheet metal processing is a problem worthy of attention.



Firstly, the selection and storage of raw materials are the first step in preventing scratches. When purchasing coated steel plates, it is necessary to choose plates with stable quality and strong coating adhesion to avoid falling off due to poor coating quality after slight friction. During the storage process, it is necessary to avoid direct contact between coated steel plates and other metal materials. It is recommended to use soft isolation materials such as foam plastic or rubber pads when stacking to reduce friction and collision between plates.



Secondly, the maintenance and adjustment of processing equipment are also crucial. The shearing machine, press brake, bending machine, and other equipment commonly used in sheet metal processing should keep the work surface and molds clean and flat, avoiding the presence of hard particles such as metal shavings and sand particles, which are prone to cause scratches during the processing process. In addition, the gap of the mold should be precisely adjusted according to the thickness of the coated steel plate; an excessively small gap will increase friction and increase the risk of scratching.

　　Thirdly, the technical training of operators cannot be ignored. Many scratch accidents are caused by improper operation, such as not wearing gloves during handling or not using special tools. Therefore, enterprises should regularly train operators in safety and skill aspects to improve their understanding of the characteristics of coated steel plates, master the correct handling, positioning, and processing methods, and avoid surface damage caused by human factors.

　　In addition, reasonable selection of processing technology and auxiliary materials also helps to reduce the scratch rate. For example, during stamping or bending processes, special anti-scratch pads or lubricants can be used to reduce direct friction between metals. When manual trimming or polishing is required, fine-grained abrasive tools should be used, with gentle operation to avoid excessive polishing that causes coating peeling.

　　Finally, strengthening quality inspection and process control is also an important means to prevent scratches. During the entire processing process, strict quality checks should be conducted on each process, to detect and deal with potential scratch hazards in a timely manner. For plates that have already appeared minor scratches, it should be decided according to the situation whether they can be repaired or replaced, to avoid defective products flowing into the next process or the final customer's hands.

　　In summary, to avoid scratches on the coated steel plate, it is necessary to start from multiple aspects such as material selection, equipment maintenance, operation specifications, process optimization, and quality control, forming a systematic protection mechanism. Only in this way can the appearance quality and service life of the coated steel plate products be ensured, meeting the increasingly growing market demand.