The principle of hemming tools
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The hemming process will be done in two steps:
- acute-angled is bend
- hemming of the envelope
For the hemming process a high compaction pressure is required. The process develops a large axial force. This force affects longitudinally of the machine.
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Steel (400 N/mm²)
| Sheet size | Pressure for step 1 | Dimension 'C' | Pressure for step 2 |
|---|---|---|---|
| 3.00 mm | 700 kN/m | 8.00 mm | 1000 kN/m |
| 0.60 mm | 90 kN/m | 3.00 mm | 230 kN/m |
| 0.80 mm | 120 kN/m | 3.00 mm | 320 kN/m |
| 1.00 mm | 150 kN/m | 3.50 mm | 400 kN/m |
| 1.25 mm | 170 kN/m | 3.50 mm | 500 kN/m |
| 1.50 mm | 220 kN/m | 4.60 mm | 630 kN/m |
| 2.00 mm | 300 kN/m | 5.50 mm | 800 kN/m |
| 2.50 mm | 550 kN/m | 6.50 mm | 900 kN/m |
Stainless steel (600 N/mm²)
| Sheet size | Pressure for step 1 | Dimension 'C' | Pressure for step 2 |
|---|---|---|---|
| 3.00 mm | 1000 kN/m | 8.00 mm | 2100 kN/m * |
| 0.60 mm | 150 kN/m | 3.00 mm | 350 kN/m |
| 0.80 mm | 200 kN/m | 3.00 mm | 500 kN/m |
| 1.00 mm | 250 kN/m | 3.50 mm | 600 kN/m |
| 1.25 mm | 260 kN/m | 3.50 mm | 800 kN/m |
| 1.50 mm | 380 kN/m | 4.60 mm | 950 kN/m |
| 2.00 mm | 500 kN/m | 5.50 mm | 1300 kN/m * |
| 2.50 mm | 900 kN/m | 6.50 mm | 1800 kN/m * |