It is correct that the unfolded shape of sheet metal parts should be as regular and tidy as possible. In the process of sheet metal processing, the regularity and neatness of unfolded shape are helpful to improve the utilization rate of materials, reduce waste, improve processing efficiency and product quality. In addition, the regular unfolded shape is also helpful for the subsequent assembly and welding work. Therefore, when designing sheet metal parts, the unfolded shape should be regular and tidy.