what bad things will happen of the metal parts ? hardware stamping parts widely use in all kind of field in our life .include some electrical metal parts ,auto metal parts ,decoration hardware parts ,commonly,we say the metal parts stamping is cold stamping parts .the metal stamping parts surface quality all is one of important problem of auto manufacturer company .cause the surface problem of metal parts have many reason .surface of rolling ,sheet metal ,mold all effect final the quality of stamping parts .the operation of stamping also case the products surface quality .so the every details of the whole produce we should conside very carefully .avoid happen quality problem .effict the surface of the finish produce .rolling material common happen bad as bellow : steel surface or inside mix other materials 2:other material drop .the roll material show scar 3:rolling material edge coner broken 4:scratch If you need stainless steel cabinet processing,pls call us :0086-15986630581