| 摘要 |
"IMPROVED BLADES FOR ROTARY CUTTER USED FOR FLY CUTTING METAL SECTIONS." A rotary cutter for fly cutting metal sections comprising a pair of opposing blades, top and bottom, which at one end have arms operationally linked to a control system capable of setting them in rotary motion, the said blades having guide teeth co-operating with them with the purpose of preventing interference of the cutting edges of the blades during the cutting stage. According to the invention the cutting edges of the blades are straight and lie in different planes to those in which the said guide teeth lie, the latter having a curved contour which determines a certain angle with the contour of the cutting edges. In this way the cut can occur in a plane which is essentially perpendicular to the longitudinal axis of the metal section to be cut.
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