Single-phase roll iron core four-section seven-stage equal-length material cutting method

The invention discloses a single-phase roll iron core four-section seven-stage equal-length material cutting method. The method comprises the steps that equal-length four-section straight material belts are cut into seven-stage oblique material belts; the fourth section straight material belt is used as the fourth stage straight material belt and directly used for iron core winding, the remaining three-section straight material belts are cut into six-stage oblique material belts, so that the winding iron core section is kept as a seven-stage trapezoidal section; four-section straight material belts required by seven-stage material belts have the same length; a first stage oblique material belt, a second stage oblique material belt, a third stage oblique material belt, a fourth section straight material belt, a sixth stage oblique material belt and a seventh stage oblique material belt are respectively selected, and are wound into a single-phase roll iron core machine by an iron core winding machine respective