Production of an exhaust fan rotor
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For our ARCELORMITTAL customer, AVIME produced the plans and manufactured a coke gas extractor rotor.
The various stages of the manufacture were:
- Three-dimensional readings on the existing rotor
- Compilation of the manufacturing and machining plans
- Cutting in 2 parts of the wheel from one forged piece
- Electron beam welding (without addition of material)
- Machining of a forged 42CrMo4 steel shaft
- Frettage par chauffe de la roue et refroidissement de l’arbre à l’azote liquide, le serrage obtenu est de plusieurs 1/10è de mm, sans clavetage
- Dynamic balancing on the bench class G0.5 as per the NF E 90 600 standard
- Overspeed test in vacuum chamber, at design rotation speed + 20% = 7,350 rpm
- Balance check after overspeed
- Application as per DIN 28 053 standard for a ceramic + PTFE based anti-corrosion and anti-adherent coating
- Balance check after coating
