Causes and Solutions of Scratches on the Bending Surface of Metal Stamping Parts

When continuous operations are performed on soft materials such as copper and aluminum alloys for stamping and bending, metal particles or residues can easily adhere to the surface of the work site, causing large scratches on the object. At this time, carefully analyze the shape of the work site, lubricating oil, and other conditions to avoid generating particles and residues in the blank, causing scratches

When the bending direction of the metal stamping is parallel to the rolling direction of the material, cracks will appear on the surface of the part, thereby reducing the surface quality of the workpiece. When metal stamping and bending are performed at more than two locations, the angle between the metal stamping and bending direction and the rolling direction should be as close as possible

When the burr surface is used as the outer surface for metal stamping and bending, the workpiece is prone to cracks and scratches; Therefore, the burr surface should be taken as the inner surface of the metal stamping bending process

The radius of the concave mold fillet is too small, and impact marks appear at the metal stamping bending part. Polishing the concave mold and increasing the fillet radius of the concave mold can avoid scratching the metal stamping bending parts

The gap between the male and female molds should not be too small, as too small a gap can cause thinning and scratching. During the stamping process, it is necessary to always check the changes in the gap of the mold

"When the punch enters the concave mold too much, it can cause scratches on the surface of the part, so it should be appropriately reduced without being affected by rebound."

In order to meet the requirements of wood processing accuracy, the metal stamping and bending mode of bottom stamping materials is often used. Therefore, during metal stamping and bending, the springs, position pin holes, plate plates, and return holes on the raw material plate become indentations, so adjustments should be made