关键词: 高放环境, 靶体基座, 密封面修复, 远程机械抛光, 气动打磨

Abstract: In high radiation environments,the seal surface of the target base is susceptible to damage such as corrosion,cracks,and scratches,which can compromise equipment operation. A remote mechanical polishing process for the target base seal surface based on pneumatic grinding was proposed. Assisted by a manipulator, remote synchronous polishing of the seal surfaces of the two counterbores on the target base was accomplished. To validate the process effectiveness,experiments were conducted including corrosion layer polishing,measurement and evaluation of defect depth removal characteristics and post-polishing flatness. The experiments results demonstrate that the proposed process effectively repairs damages like corrosion,surface cracks,and scratches on the seal surface of the target base. After repair,the surface roughness achieves Ra≤0.8 μm and the flatness δ≤0.02 mm,meeting the critical seal performance requirements for the safe operation of the target base.

Key words: high radiation environment, target base, seal surface repair, remote mechanical polishing, pneumatic grinding