rivetless riveting machine joint two layers of metal board by punch Labor- ... 7.4KN/T max thick of board 2+2 Rivetless riveting machine joint two layers of several layers of metal board ... , the molding tool to lower consumedly. This kind of machine riveting joint function is strong, process stability has no rock, ... , the copper , aluminums, steel, zinc are all unlimited Rivetless riveting machine