Method and apparatus for operating a band saw

摘要

Method and apparatus for operating a band saw blade which is disposed in a continuous loop about a pair of spaced wheels in a band saw housing. One of the wheels is driven to impart longitudinal cutting movement to the blade. The blade is alternately tilted from a first to a second extreme cutting angle relative to the work. The tilting movement of the blade has a predetermined cycle so that for a major portion of each cycle, the blade dwells at its extreme angles of tilt relative to the work. One apparatus for carrying out this method is an eccentric drive which oscillates the entire housing of the band saw in the predetermined cycle. Another apparatus is a mechanism which alternately deflects the cutting span of the blade to change its angular orientation relative to the work piece in the predetermined cycle.