In metal stamping operation, several important factors and design cautions need to be considered

1. Precision Metal Stamping Operation

Production and operation after stamping can include deburring, tapping, reaming and drilling processes. It is allowed to add other parts to the stamping, or correct the defects in the surface treatment, or remove sharp edges that may affect the safety.

After the stamping operation is completed, remove the remaining cutting material fragments from the workpiece. Sharp edges may require grinding to remove burrs, or they may need to be turned over to produce smooth edges and guide the burrs to the inside to avoid wrinkles affecting the appearance.


2. Design cautions

Because these predictions are more likely to distort and affect the perception of finished products on quality, too narrow predictions should be avoided in stamping products.

If possible, the design should be based on the standard shape and bending of the current mold. The stamping die needs to be customized, which will increase the cost of the original die. The main purpose of preventing sharp internal and external corners is to reduce large burrs and sharp edges in these areas. In addition, due to long-term use, the stress concentration potential of sharp corners is great, which may lead to cracking or subsequent part failure.

The overall size of the finished product will be limited by the available size of sheet metal or base metal, and the materials consumed by the use of edges or reverse folding and any other materials shall be considered. Large products require multi-step creation and mechanical connection as the second step in the production process.

For punching work, not only the punching direction, but also the size of punching characteristics should be considered. In general, it is better to punch in one direction, so that any sharp edges produced by punching should be on the same side of the workpiece.

These edges can then be hidden away from the appearance of workers or end users of the product because they pose a security risk. Punching characteristics shall reflect the thickness of raw materials, and the size of punching characteristics shall be at least twice the thickness of materials.

The minimum bending radius of sheet metal parts is roughly the same as the material thickness. Small bending is difficult to complete, which may lead to stress and product quality problems of finished parts.

These operations will help ensure its positioning, tolerance and accuracy. As a normal material thickness, the minimum spacing of holes shall be at least twice the material thickness.

During the bending operation, we should be aware of the risk or deformation of the material because the material on the inner and outer surfaces of the bending point is compressed and stretched. The minimum bending radius shall be approximately equal to the thickness of the workpiece to avoid accumulation of stress concentration. The turning length should be more like three times the thickness of the workpiece, which is a good method.