Steel Mill Stand

• Customer problem:

Our customer was facing problems with corrosion between the mating face of the bending blocks and the mill stand windows.

• Solution:

Rework mill geometry:

• Recovery of 4 bending areas 1000mm x 800mm
• Re machine 2 windows areas 1200mm x 415mm
• Re-machine 2 windows 1200mm x 1300mm
• Machining of 4 vertical keyways 82H9 x 20mm
• Machine 4 x horizontal keyways 164H8 x 40mm
• Drilling and tapping of 40 x M39 holes
• Extraction of various broken studs

• Key Site Data:
  
  • Portable CNC milling machine:
    • Greater material removal due to engine power and stability of the machine. Greater material removal due to motor 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 reduced set-up.
  • Material removal: 2 to 5 mm depending on the surface
  • Tolerances
    • Altimetry: +/- 0.1mm Level: +/- 0.1mm
    • Perpendicularity: +/- 0.05mm
    • Parallelism: +/- 0.05mm
  • Surface condition:
  • Machine setup via survey and geometry with the pass line as a reference.
  • Parallel machining of cages and bending blocks