|
1.
|
Material type:
|
Remember the least expensive material may not be cost; a higher strength alloy reducing thickness. Keep hardness below 80Rb. |
| 2. |
Material thickness |
Thinner materials perforate easier and faster. |
| 3. |
Hole shape and pattern |
Round holes are the most economical, 60 staggered round hole pattern strongest and most versatile. |
| 4. |
Hole size |
Do not go below 1-to-1 ratio with sheet thickness. Stay 2-to-1 larger if possible. |
| 5. |
Bar size |
Do not go thinner than 1-to-1 ratio with sheet thickness |
| 6. |
Centre distance |
It controls feed rate and thereby the production rate. If possible a pattern with longer center to centre distance. |
| 7. |
Open areas |
Extreme open areas proportions tend to increase distortion; if possible choose under 70%. |
| 8. |
Margins |
Keep side margins to a minimum to reduce distortion. Use standard unfinished end margins if you can. |
| 9. |
Stick to standards |
Specify standard hole patterns, materials dimensions and tolerances whenever possible before specifying a "Special " consult us so that existing toolings can be used. |
| 10. |
Perforating burrs |
Accept normal commercial burrs unless otherwise specified. |
