Patent ID: 6038951
Filing Date: 2000-03-21
Classification: B23D,Y10T

Abstract:
Flying shears for shearing rolled stock having a leading end segment, a main body and a trailing end segment, the rolling stock travelling at high speed, comprising:a pair of blade-holder drums, each bearing first and second blades, rotatable in opposite directions about spaced parallel axes of rotation and defining a shearing area therebetween;a one-channel switch of a start stop type provided upstream of said shearing area, the one-channel switch conveying rolled stock lengthwise, wherein said one-channel switch is laterally movable on an orientation plane substantially containing an axis of feed of the rolled stock and parallel to and lying between said axes of rotation of said pair of blade-holder drums; anda two-channel switch provided downstream of said shearing area and having a first channel for receiving and directing the leading end segment and the trailing end segment of the rolled stock, and a second channel for receiving and directing the main body of the rolled stock, said first and second channels being superimposed, at least at their upstream ends, on a plane perpendicular to the axes of rotation of said blade-holder drums and separated by a central partition plate, wherein said two-channel switch is laterally movable substantially on the same orientation plane as, and in synchronization with, said one-channel switch;wherein said first blades of each blade-holder drum are arranged on said pair of blade-holder drums so as to form a first pair of blades to shear the leading end of the rolled stock and to create at the downstream end of the main body of rolled stock a first arcuate portion to enable the main body of rolled stock to be introduced into said second channel of said two-channel switch; andwherein said second blades of each blade-holder drum are arranged on said pair of blade holder drums so as to form a second pair of blades to shear the trailing end of the rolled stock and to create in the downstream end of the trailing end segment a second arcuate portion to enable the trailing end segment to be introduced into said first channel of said two-channel switch.