|At the moment we have 13 grinding machines.
We do have 7 grinding machines with a moving grinding wheel for larger rolls and 6 machines with a fixed grinding wheel for smaller rolls.
The large grinding machines enable us to grind very big and heavy rolls with maximum precision. These machines can grind rolls with a diameter from 1000 mm up to 3500 mm with a maximum grinding length of 10000 mm. We are, for example, able to grind a calender roll with a weight of 25 tons and the dimensions of a diameter of 1000 mm and a length of face of 5000 mm to a cylindricity less than 1 µm.
All larger grinding machines and some of the smaller ones have got a CNC system. Soon we will also modify the remaining machines with a CNC system.
|This CNC technique gives us the ability to produce any requested profile of the face. The deviation of the profil's target can be limited to 1 µm. The result of grinding including run-out and concentricity is made out and printed electronically.
One exceptional feature is the grinding at working temperature. 3 of our large machines are able to do grinding rolls with exactly the temperature the customer uses during the production process.
For this reason all these 3 machines have got an efficient heating facility. Because of this equipment we are able to grind rolls at a temperature from 20° C up to 220° C. As during grinding at ambient temperature the deviation of the profil's target can be limited to 1 µm. The result of grinding is made out and printed electronically.