Double Linkage WF67K 80ton 2200 Hydraulic Folding Machine/80TON 3.2meters Bending Machine/Sheet Metal Press Brake With DA41 Products feature: 1:The whole machine is in sheet plate welded structure ,with internal stress eliminated by vibration aging technology,high strength and good rigidity of machine. 2:Double hydraulic oil cylinder is applied for upper transmission ,provided with mechanical limit stopper and synchronous torsion bar, typical of stable and reliable operation, as well as high precision. 3:Electrical control and manual fine-tuning mode are adopted for distance of rear stopper and stroke of gliding block ,and fitted with digital device ,easy and quick in use. 4:Upper die is fitted with deflection compensation device.