Patent ID: 6837129

Claim:
Device for planishing a band saw blade ( 2 ) or the like, comprising means ( 1 ) for continuously driving the blade. ( 2 ) ensuring its positioning flat at least beneath a work zone, means ( 3 ) for detecting the deformations of the blade ( 2 ) and punishing means ( 6 ) in the work zone, positioned downstream of said detection means ( 3 ), characterized in that the detection means ( 3 ) are constituted by position sensors ( 4 ) fast with a table ( 5 ) positioned underneath the blade ( 2 ) so that the heads of said sensors ( 4 ) are substantially at the level of the upper face of the table ( 5 ) level with the lower face of the blade ( 2 ), said sensors ( 4 ) being regularly spaced apart on a line transverse to the direction of advance of the blade ( 2 ), and in that the planishing means ( 6 ) are constituted by hammers ( 9 ) cooperating with an anvil ( 8 ) positioned underneath the saw blade ( 2 ), preferably in a number identical to the sensors ( 4 ) and constituted by preferably parallelepipedic bars extending perpendicularly to the blade ( 2 ) level with the anvil ( 6 ) and maintained in their position of rest above the blade ( 2 ) by return means ( 27 ) allowing the blade to advance between the anvil ( 8 ) and the heads of the hammers ( 9 ), the latter being regularly spaced apart in the axis of the sensors ( 4 ) and actuated by mechanical drive means respectively controlled by position sensors ( 4 ) so that, when a sensor ( 4 ) detects a deformation of the surface of the body of the blade ( 2 ), the hammer ( 9 ) corresponding to said sensor ( 4 ) is actuated to planish said deformation.