Notice of Laser Cutting
In sheet metal processing, laser cutting is often used for: blanking, cutting shape, secondary cutting, cutting line, cutting special-shaped holes, etc.Machining accuracy ±0.1mm
- When cutting the bottom hole of the hardware,it must be increased by 0.05mm, because there will be tiny contacts at the start and end of the cutting
- When cutting the craft hole, the width is generally greater than 0.5mm, the smaller the burr, the more obvious.
- In laser processing, the chamfer must be ≥0.5mmto prevent scorching.
CNC Punch
Common uses of CNC punching machines: blanking, punching mesh, punching convex hull, trimming, punching bumps, beading, crimping, punching, etc. Machining accuracy ±0.1mm
Hole extraction: The minimum distance between the NCT extraction hole and the edge is 3T, the minimum distance between two extraction holes is 6T (unless there is a special avoidance, which can be reduced), the minimum safety distance between the extraction hole and the bending edge (inside) is 3T+R, if it is too small, it must be crimped.
Generally, the height of NCT punch and half shear does not exceed 0.6T, if it is greater than 0.6T, it will easily fall off.
The distance between the hole and the edge should not be too small, the allowable value is shown in Table 1; the minimum hole diameter of NCT stamping is shown in Table 2: (T means material thickness)
| Table 1: Material |
Punching Round Hole |
Punching Square Hole |
| Hard Steel |
0.5T |
0.4T |
| Mild Steel/Brass |
0.35T |
0.3T |
| Aluminum |
0.3T |
0.28T |
| Table 2: Material |
Punching Round Hole |
Punching Square Hole |
| Hard Steel |
1.3T |
1.0T |
| Mild Steel/Brass |
1.0T |
0.7T |
| Aluminum |
0.8T |
0.6T |
