Steel Mill Stand Machining

• Customer problem:
  • 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.

• Solution:

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
  • Tolerances
    • Parallelism between windows: +/- 0.08mm
  • Surface condition: Ra = 3.2μm
  • Machine setup via survey and geometry with the pass line as a reference.