During regular roll change and subsequent reliability inspections it was discovered that the mill stand was not operating as it should and wear and corrosion was discovered
It was clear that to improve the overall operation of the mill stand it would be necessary to re-machine the mill windows and fit wear plates returning the stand back to standard operational tolerances.
Rework mill geometry:
Machining of 4 vertical slides of 2200 x 400 mm
Key Site Data:
CNC Milling machine:
Greater material removal due to engine power and stability of the machine
Ability to reach all surfaces with a single machine configuration
One reference take and one machine setup
Greater accuracy due to fewer set-up /referrals
Material removal: 60mm
Parallelism between windows: +/- 0.08mm
Surface condition: Ra = 3.2μm
Machine setup via survey and geometry with the pass line as a reference.