In the process of sheet metal processing and stamping parts processing, some problems are often encountered. For example, burrs are a common problem, which is usually caused by the failure to remove excess material during stamping or chamfering, resulting in the formation of burrs on the steel plate section. When the height of burrs exceeds 0.2mm of the cross-section, iron powder may damage the mold, causing uneven surfaces. Another common problem is the uneven surface of materials, which is usually caused by foreign objects (such as iron filings and dust) mixed in on the unwinding line. In addition, roll marks may also occur due to foreign objects adhering to the cleaning or feeding rollers. To avoid these problems, corresponding preventive measures need to be taken, such as removing foreign objects, adjusting the feeding balance, etc.