Magnesium alloy sheet strip coupling and deformation combined rolling system and rolling method thereof

The invention relates to a magnesium alloy sheet strip coupling and deformation combined rolling system and a rolling method thereof, and mainly solves the technical problems of strong mechanical anisotropy, bad plate shape and edge crack defects and low yield of rolled magnesium alloy sheet strips in a traditional rolling process and low production efficiency in an equal channel angular rolling method. The magnesium alloy sheet strip coupling and deformation combined rolling system consists of two uncoiling-coiling machines, two five-roller shearing and bending large deformation adjusting devices, two three-roller straightening machines, two roller clamping and feeding devices and a six-roller reversible rolling machine, wherein the uncoiling-coiling machines, the five-roller shearing and bending large deformation adjusting devices, the three-roller straightening machines and the roller clamping and feeding devices are arranged at the front and back edges of the six-roller reversible rolling machine in sequence to realize reciprocating rolling of magnesium alloy sheet strips. The rolling method of the rolling system comprises the following steps: the reciprocating rolling is performed for uncoiled magnesium alloy strip coils in sequence through the equipment; and the system is stopped when the finished product rolling is finally finished.