TYHI is one of the earliest manufacturers of wind power shaft, with advanced professional finish machining production line for wind power shaft with 7 sets CNC lathes, 1 set NC grinding machines and the corresponding constant temperature room, cleaning room, sandblasting room，thermal zinc-spraying room, painting room, drying room and dust removal system etc. The equipment is designed and built according to the high standard of Siemens requirements, the processing capacity covers the manufacture of wind power shaft below 6MW, and the whole production line of annual output is 1200 pieces.