The post-process of steel ball production, namely automatic steel ball cleaning, automatic appearance inspection (automatic rejection of unqualified products), automatic rust prevention, and counting and packaging, are the keys to affecting the quality of steel balls. The appearance inspection of steel balls is an indispensable process in the processing of steel balls. The appearance inspection of the steel ball mainly includes the inspection of surface scratches, rust, and surface spots. Steel ball production process: stamping--polishing--quenching--hard grinding--appearance--grinding--cleaning--rust prevention--finished product packaging.