The shearing machine is all steel cold welding mechanism, hydraulic drive, vibration and stress relief, high mechanical strength and good rigidity. The hydraulic pendulum shear is cut according to the main oil cylinder (fixed on the wallboard) and return nitrogen cylinder, so the hydraulic system is simplified. The upper carriage of the swing shear makes circular arc swing around the fixed axis in the process of cutting. Under the action of lever, the stress at the stress point is very small, which can adjust the service life and mechanical life of the cutting edge. The structure of the whole machine is compact, and the travel of the upper carriage can be adjusted infinitely, which greatly improves the work efficiency. By moving the upper blade and fixing the lower blade, the hydraulic plate shearer exerts shearing force on the metal plates with different thickness to make the metal plates break and separate according to the required proportion. Working principle and structure of hydraulic shears hydraulic shears are usually used for cutting straight edge sheet metal. During the shearing process, the flatness and parallelism of the shearing surface of the plate to be sheared shall be ensured, and the deformation of the plate shall be minimized to obtain high-quality parts.