These several important factors need to be considered in the metal stamping processing

In the metal stamping operation, we need to consider several important factors and design considerations, as well as the precision hardware processing operations!

Precision hardware processing operation

Post-stamping production operations can include deburring, tapping, reaming, and boring processes. These allow the addition of additional parts to the stamping, the correction of defects in surface treatment, or the removal of sharp edges that may affect safety.

Deburring involves the removal of debris from the cutting material remaining on the workpiece after the stamping operation is completed. Sharp edges may require grinding to remove burrs, need to be turned to produce smooth edges and direct the burr edges to the internal fold, or affect aesthetics.

Design precautions

In stamping products, too narrow predictions should usually be avoided because they may be more prone to distortion and affect the perception of the quality of the finished product.

Where possible, the design shall be based on standard shapes and bending using existing molds. The need to redesign the die used for stamping will increase the initial die cost.

Avoiding sharp internal and external corners in stamping product design is mainly to reduce the occurrence of large burrs in these areas and sharp edges that require secondary treatment to be removed.

Furthermore, there is great potential for stress concentration at the pointed angle, which may lead to cracking or subsequent failure of the parts due to prolonged use.

The overall size of the finished product will be limited by the available size of the sheet metal plate or blank, and these limitations require consideration of the material consumed in the edge or flip folding as well as any other material used. Very large products may need to be created in multiple steps, and very large products may require multiple steps to be created and mechanically connected together as a second step in a production process.

For punching operations, both the direction of the punching and the size of the punching features should be considered. Usually, it is best to punch in one direction so that any sharp edge produced by the punch will be on the same side of the workpiece.

These edges can then be hidden for cosmetic purposes and away from general access by workers or end users of the product, as they may represent hazards. The punching characteristics should reflect the thickness of the raw material. The general rule is that the size of the punching features should be at least twice the thickness of the material.

For bending, the minimum bending radius in the sheet metal piece is roughly the same as the material thickness. Smaller bends are more difficult to achieve and may cause stress concentration in finished parts, leading to product quality problems.

Performing these operations in the same step will help ensure their positioning, tolerance, and repeatability. As a general rule, the hole diameter should not be less than the material thickness, and the minimum spacing of the holes should be at least twice the thickness of the material.

When performing the bending operation, be aware of the risk of deformation of the material because the inner and outer surfaces of the bending point are compressed and stretched, respectively. The minimum bending radius shall be roughly equal to the thickness of the workpiece to avoid a concentrated accumulation of stress. As a good practice, the turning length should be more like three times the thickness of the workpiece.