Shearing Machine

The machine operates using two primary blades: a stationary lower blade fixed to the bed and a movable upper blade. As the upper blade descends—driven by hydraulic or mechanical force—it creates a concentrated stress point. This action is similar to a pair of heavy-duty industrial scissors designed for thick metal.

When the upper blade contacts the metal, the material initially undergoes elastic deformation, followed by plastic deformation. As the blade penetrates further (typically 1/3 of the thickness), the stress exceeds the material's shear strength, causing micro-cracks to form and meet, resulting in a complete fracture.

"Blade gap" or clearance is the tiny perpendicular distance between the two blades. Proper clearance—usually 5-10% of the material thickness—is critical. If the gap is too small, friction increases blade wear; if it is too large, the metal will "pull" between the blades, creating excessive burrs.

Most machines utilize a rake angle, where the upper blade is slightly tilted from left to right. This ensures that only a small section of the blade engages the material at any given time. This design significantly reduces the total force required to cut through long or thick metal plates.