What Is Mechanical Deflection Compensation for Bending Machines & Its Functions

Multiple built-in compensation modules inside bending machine worktables constitute mechanical deflection compensation, the core standard feature guaranteeing precision for long plate bending. Bending force causes sinking deformation at the center of worktables and slides, resulting in standard angles at plate ends but oversized angles in the middle, leading to scrapped mass workpieces. The CNC system reads plate thickness, bending force and die opening values to automatically calculate compensation, driving compensation blocks to form concave-convex surfaces that counteract deformation. All bending machines from Shanghai No.1 Forging (hydraulic, oil-electric hybrid and full-electric) come with this standard structure, removing manual shim adjustment. For long sheets of 2500–6100mm, the full-length bending angle error is controlled within ±0.1°, cutting manual die adjustment time and drastically lowering scrap rates.