Prepare a detailed inspection and analysis before repair: Conduct a detailed inspection and analysis of the cracks generated by the Sheet Metal Processing of the chassis to determine the direction, depth and distribution of the cracks. Understand the cause of the cracks so that targeted measures can be taken during the repair process.

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Cleaning treatment: Clean up the impurities and oxide layer around the crack to ensure that the repair material can fit tightly. Methods such as grinding or sandblasting can be used for cleaning. Second, choose the appropriate repair material According to the material and use environment of the chassis sheet metal parts, choose the repair material that matches it. For example, for stainless steel sheet metal parts, the corresponding stainless steel welding material should be selected. Third, repair method Welding repair: Welding is one of the commonly used repair methods. By controlling parameters such as welding temperature, speed and pressure, the repair material can be fused with the sheet metal shell processing parts to achieve the purpose of repairing cracks. In order to avoid new stress concentrations and cracks during welding, measures such as preheating and post-heating can be taken. Brazing or Adhesive Repair: For some cracks that are not suitable for welding or are difficult to weld, the method of brazing or bonding can be considered for repair. IV. Precautions for the Repair Process Safe Operation: During the repair process, be sure to pay attention to safety issues, such as wearing protective glasses, gloves and other personal protective equipment to avoid splashes and burns. Control the Repair Quality: During the repair process of sheet metal processing of the chassis, various parameters should be strictly controlled to ensure that the repair quality meets the requirements. After the repair is completed, quality inspection of the repair part needs to be carried out, including appearance inspection, dimensional measurement and performance testing, etc. V. Other Repair Techniques For some minor cracks or depressions, heating, pressing and cooling methods can also be used for repair. The specific operation is to use a hot air gun or a hot press to heat the sheet metal to a certain temperature, then press the depression with a support, and then cool it naturally or perform rapid cooling treatment after the repair is completed.