ScopeDryer / Yankee cylinder surfaces
ProcessesMirror grinding · thermal spray · patch repair
CoatingChrome-free thermal spray
1 · Equipment Overview
| Function | Restore cylinder roundness, roughness and surface quality. |
| Typical defects | Chattermark, streaks, scratches, micro-weld spots, coating spalling. |
2 · Maintenance Process
Clean & recordClean the surface; mark position and extent of chatter / streaks.
MetrologyMeasure and record roughness, roundness, runout.
Tooling set-upAlign grinding carriage and dress the wheel.
GrindingStaged grinding to remove the damaged layer; controlled depth and feed.
Micro-weld dressingLocal dressing of micro-weld spots.
Patch repairLocal weld-repair / grind of damaged zones.
Surface preparationGrit-prepare surface before thermal spray.
Thermal sprayApply chrome-free thermal-spray coating.
FinishingMachine / polish coating to mirror finish.
Final inspectionRe-verify roughness, appearance and coating thickness.
3 · Key Process Photos
4 · Acceptance & Handover
Chatter / streaks / scratches eliminated; roughness and roundness to target; coating well bonded with no misses or spalling; mirror finish to specification.