Patent ID: 8278585

Claim:
A hot-wire cutter comprising: a frame ( 20 ); a tank ( 10 ) supported on the frame ( 20 ); a first working head ( 40 ) located on a floor of the tank ( 10 ); a second working head ( 50 ) movably supported on the frame ( 20 ); a supporting unit ( 60 ) supported on the frame ( 20 ) and used to support an annular work piece ( 90 ); a restraining unit ( 70 ) supported on the frame ( 20 ) and used to clamp the annular work piece ( 90 ); and a rotating unit ( 80 ) supported on the frame ( 20 ) and used to rotate the annular work piece ( 90 ) so that a line between the first and second working heads ( 40 , 50 ) is directed through the centers of initial apertures in the annular work piece ( 90 ), one after another, to facilitate precise processing of sections of the annular work piece ( 90 ) corresponding to the initial apertures.