Design of Outline of Cut-off Knife Blade in Changcheng Cigarette Maker

The design of the outline of cut-off knife blade in Changcheng cigarette maker is very important,if the knife and sharpener wheel are not in a good match,the knife will be broken or burrs be produced,and the cigarette cutting surface is influenced.Therefore,the design of blade outline of cut-off knife was studied.The simplified physical model of grinding movement was established by analyzing the principle of cigarette cutting and knife sharpening;on the basis of that,two design methods were derived.By the second method,the orbital equation of the center of the sharpener wheel was presented,the plane portion of knife was cut out along the orbit aided by Pro/E;the cut profile integrated with the round curve of cut-off knife head and the practical blade shape was obtained.