Cutting technology of annular steel plate

The invention provides a cutting technology of an annular steel plate. The technology comprises the steps of (1) firstly putting a to-be-cut steel plate on a cushion block, marking out an inner-ring straight opening cutting curve and an outer-ring straight opening cutting curve on the to-be-cut steel plate and cutting a through hole; (2) connecting a metal wire and a cutting trolley and connecting the cutting trolley to an air belt and a power supply; (3) cutting an inner-ring straight opening of the to-be-cut steel plate; (4) marking out a wall-thickness center curve of the inner-ring straight opening of the to-be-cut steel plate; (5) cutting a groove in the surface of an inner ring of the to-be-cut steel plate; (6) cutting a groove in the reverse surface of the inner ring of the to-be-cut steel plate; and (7) cutting an outer-ring straight opening of the to-be-cut steel plate. The technology is simple in operation, the cutting quality of the annular steel plate is effectively improved, and the cutting diffi