Large-diameter linear groove opening pliers

The pair of scissors comprises a left plier and a right plier which are pivoted together, N shear knives are arranged on the head portion of the left plier at intervals, N-1 shear grooves are formed, and correspondingly, N-1 shear knives are arranged on the head portion of the right plier and matched with the N-1 shear grooves in the head portion of the left plier. N-2 shearing grooves are formed in the right plier head and matched with the N-2 shearing knives in the middle of the left plier head. N is an integer larger than or equal to 3, and the orthographic projection distance between the two outer side shearing knives of the left pliers is the shearing caliber of the open mouth pliers. The utility model relates to a pair of large-caliber linear groove opening pliers, which is convenient for forming a large opening of a linear groove on a metal thin plate such as an aluminum alloy groove plate and a groove plate, and has the advantages of time saving, efficient shearing, labor saving, high efficiency, conv