Welding factor. During welding, the alloy alignment deviation is large, which affects the grinding accuracy, resulting in high pressure on one side of the grinding head and low pressure on the other side. The rear Angle also produces the above factors, poor welding Angle, and human unavoidable factors, which all have unavoidable influence on grinding wheel and other factors. 4. Influence of grinding wheel quality and granularity width. When the grinding wheel is used for grinding, please pay attention to the particle size of the grinding wheel. If the particle size is too coarse, the trace of the grinding wheel will be generated.