Research of Key Technologies for Remanufacturing Tunnel Boring Machines
As a high-value equipment,tunnel boring machines(TBMs)have a large market share and face huge resource waste when abandoned.Therefore,it is necessary to develop remanufacture of TBMs.Based on industry development characteristics and the experience of China Railway Construction Heavy Industry industrialization,the remanufacturing process and characteristics were explained,then remanufacturing evaluation system and remanufacturing design system were elaborated.It was focused on key technologies such as automatic sandblasting of oversized components,precision ring laser cladding,portable repair processing,and efficient purification of contaminated oil,introducing the remanufacturing process system of disassembly and cleaning,repair,and inspection.Finally,the economic and social benefits of remanufacturing TBMs compared to new products were analyzed,objective issues limiting green remanufacturing of TBMs were analyzed,and constructive suggestions for further promotion were proposed.
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