Patent ID: 9278456
Filing Date: 2016-03-08
CPC Classification: B21B,B26D,Y10T

Claim Text:
1. A trim shear for trimming the front and tail ends of a hot rolled product exiting from a rolling mill along a mill pass line and travelling at either high or low speeds, depending on the size of the product being rolled, said trim shear comprising: a trim station having a high speed a set of trim knives configured and arranged to trim the front and tail ends of high speed products, and a different low speed set of trim knives disposed laterally from said high speed set of trim knives and configured and arranged to trim the front and tail ends of low speed products, wherein said high speed set of trim knives comprises continuously rotatable front end trim knives laterally spaced from continuously rotatable tail end trim knives by a high speed pass through devoid of trim knives, and wherein said low speed set of trim knives comprises continuously rotatable front end trim knives laterally spaced from continuously rotatable tail end trim knives by a low speed pass through path devoid of trim knives; a chopping station arranged in series with said trim station along the mill pass line, said chopping station having a set of high speed chopping knives configured and arranged to chop the front and tail ends of high speed products, and a different set of low speed chopping knives configured and arranged to chop the front and tail ends of low speed products, wherein said high speed sets of chopping knives comprises continuously rotatable front end chopping knives laterally spaced from continuously rotatable tail end chopping knives by a high speed pass through path devoid of chopping knives, and wherein said low speed set of chopping knives comprises continuously rotatable front end chopping knives laterally spaced from continuously rotatable tail end chopping knives by a low speed pass through path devoid of chopping knives; the high and low speed pass through paths of said sets of high and low speed chopping knives being aligned respectively with the high and low speed pass through paths of said sets of high and low speed trim knives; and, traversing means operable to shift both said trim station and said chopping station transversely in unison with respect to the mill pass line.