Скачать или смотреть Hydraulic cold shearing of I-beams

This equipment is essentially a hydraulic cold shear machine that uses shearing force instead of flame to "cut" I-beams. In the video, a worker feeds the steel section into the lower die for positioning, and a hydraulic cylinder pushes the upper blade downwards to press it together, creating an instantaneous high-stress zone. When the stress exceeds the steel's yield strength, shear fracture occurs directly. Compared to oxy-acetylene cutting, this method has no heat-affected zone, does not alter the material's microstructure, and does not require secondary grinding to correct the end face, making it suitable for batch cutting. The real efficiency lies not in "great force," but in whether the blade gap and the force line are aligned with the shearing positions of the web and flanges; otherwise, tearing and burrs are easily generated. While it appears to break with a single press, it actually utilizes material strength and the principle of hydraulic amplification—using stable pressure instead of unstable high temperature.