Method for preventing collapse and flattening of cold hard coil of very thin gauge

Abstract

The application discloses a method for preventing the collapse and flattening of cold hard coils with an extremely thin specification, wherein the A2 value of the standard curve of the operation plate of the acid combined rolling mill train is set to be-2 to-4, the outer diameter size error of the winding drum of the coiling machine of the temper mill train is less than or equal to 0.5 mm / m, and the operation key points of the temper mill train are controlled within ±5 mm; the thickness is 0.325-0.350 mm, the entrance unwinding tension is 12 KN, the set tension of the exit coiling head is 14 KN, the thickness is 0.307-0.325 mm, the entrance unwinding tension is 10 KN, the set tension of the exit coiling head is 12 KN, but after 200 m of coiling, the thickness is 0.275-0.307 mm, the entrance unwinding tension is 11 KN, the set tension of the exit coiling head is 13 KN, the thickness is 0.250-0.275 mm, the entrance unwinding tension is 11 KN, the set tension of the exit coiling head is 12 KN, but after 200 m of coiling, the coiling tension is increased to 18 KN.