Customer case - Connecting ring
A European family-owned company produces flanges, mainly for wind towers. Their customers are OEMs, both for the home market and for export. The demand is always higher than the supply and there is a constant search for higher productivity. Sandvik Coromant technical specialist, Andres, got the chance to investigate the productivity potential for making holes.
“We have an agreement with a Sandvik Coromant competitor for the turning operation, but were willing to give Sandvik Coromant a chance to help us with hole making, as we had vibration problems with the existing method,” says the owner.
The machine is drilling with two spindles at the same time, which works fine with CoroDrill® 880. The holes are 45 mm in diameter and the ring has a 4-meter diameter. By replacing the existing solution with CoroDrill 880, the vibrations decreased and at the same time the productivity increase was substantial.
“Since we produce 4,000 pieces a year of this kind of ring and each ring has 70 holes, the new solution showed considerable savings, both with regards of time and money. We are very satisfied with the Sandvik Coromant solution,” he continues.
General information
Component: Connecting ring (4 meters dia)
Material: Low carbon steel, ST-52
Type: Machining center 50/5000
Spindle: Vertical
Spindle interface: ISO50
Coolant: Internal Coolant
Production rate: 240,000 holes per year/4,000 pieces per year of this ring
| SD502 | 880-D4500L50-04 |
| 1,768 rev/min | 2,264 rev/min |
| 250 m/min | 320 m/min |
| 0.1 mm/rev | 0.12 mm/rev |
| 53.61 min | 34.9 min |
| 1,608 min | 1,396 min |
| Vibrations | Tool wear |
Result: More productivity
Yearly savings: €100,156
Time savings: 1,253 hours
