Manufacturing process of rotary opening tank and rotary opening tank

The invention provides a manufacturing process of a rotary opening tank. The manufacturing process is reasonable; the manufacturing process of the rotary opening tank comprises the following steps that 1, a metal plate is stamped into a cup-shaped blank body; 2, the cup-shaped blank body is stretched to form a can blank, wherein the tank body is provided with a tank opening, a tank body and a tankbottom which are integrally formed; 3, the outer peripheral wall of the tank bottom is subjected to one-time hole shrinkage or above, and a first hole shrinkage section is formed; 4, the bottom wallof the tank bottom is punched and straightened, an edge coiling is formed in the opening, so that the opening of the rotary opening tank is formed; 5, trimming is carried out on the opening of the tank opening to form the tank bottom of the rotary opening tank; 6, the first hole shrinkage section is subjected to threading and rib rolling from top to bottom to form a thread rotary opening and a safety ring respectively; 7,