Prevent plate deformation caused by CNC punching
2021-06-29
If many holes are punched on a plate, the plate cannot be kept flat due to the accumulation of punching stress. Each time a hole is punched, the material around the hole deforms downwards, causing tensile stress on the upper surface of the sheet and compressive stress on the lower surface. For a small amount of punching, the effect is not obvious, but when the number of punching increases, tensile and compressive stresses accumulate somewhere until the material is deformed.
One way to eliminate this kind of deformation is to punch every other hole first, and then return to punch the remaining holes. Although this will also generate stress, it relieves the stress accumulation during sequential punching in the same direction, and also makes the stresses of the front and rear two sets of holes cancel each other out, thereby preventing the deformation of the sheet.
