Burr removing method and apparatus

Abstract

In a burr removing method and apparatus of the present invention, a burr located at an edge of a steel piece is cut with a cutter by disposing the cutter such that the flank of the cutter is substantially in parallel with the surface of the steel piece on which the burr exists and the angle between the cutting edge of the cutter and the edge of the steel piece which the burr intersects is at least 45° and relatively moving the cutter toward the outside of the steel piece along the lengthwise direction of the burr; or by disposing the cutter such that the flank of the cutter is substantially in parallel with the surface of the steel piece on which the burr exists and the angle between the cutting edge of the cutter and the edge of the steel piece which the burr intersects is at least 90° and cutting the burr located at the edge of the steel piece by relatively moving the cutter perpendicularly to the lengthwise direction of the burr. In the present invention, burrs such as welding burrs and the like formed when billets and so on are continuously rolled can be cut without the occurrence of a protruding burr.

1 . A burr removing method comprising the steps of: 
 disposing a cutter such that the flank of the cutter is substantially in parallel with the surface of a steel piece on which a burr exists and the angle between the cutting edge of the cutter and the edge of the steel piece which the burr intersects is at least 45°; and    cutting the burr located at an edge of the steel piece by relatively moving the cutter toward the outside of the steel piece along the lengthwise direction of the burr.    
     
     
         2 . A method according to  claim 1 , wherein a cutter having a polygonal cutting edge is used.  
     
     
         3 . A burr removing method comprising the steps of: 
 disposing a cutter having a circular cutting edge such that the flank of the cutter is substantially in parallel with the surface of a steel piece on which a burr exists and the following formula is satisfied with respect to the burr; and    cutting the burr located at an edge of the steel piece by the cutter by relatively moving the cutter toward the outside of the steel piece along the lengthwise direction of the burr;      R/ 2+ W/ 2<Δ< R−W/ 2  (1)   where, W shows the width of the burr, R shows the radius of the cutter, Δ shows the shortest distance from the center of the cutter to the center line of the width of the burr.    
     
     
         4 . A method according to  claim 3 , wherein a rotatable cutter having a circular cutting edge is used.  
     
     
         5 . A burr removing method comprising the steps of: 
 disposing a cutter such that the flank of the cutter is substantially in parallel with the surface of a steel piece on which a burr exists and the angle between the cutting edge of the cutter and the edge of the steel piece which the burr intersects is at least 90°; and    cutting the burr located at an edge of the steel piece by relatively moving the cutter perpendicularly to the lengthwise direction of the burr.    
     
     
         6 . A method according to  claim 5 , wherein a cutter having a polygonal cutting edge is used.  
     
     
         7 . A burr removing method comprising the steps of: 
 disposing a cutter having a circular cutting edge such that the flank of the cutter is substantially in parallel with the surface of a steel piece on which a burr exists and the center of the cutter is located outwardly of the edge of the steel piece which the burr intersects; and    cutting the burr located at an edge of the steel piece by relatively moving the cutter perpendicularly to the lengthwise direction of the burr.    
     
     
         8 . A method according to  claim 7 , wherein a rotatable cutter having a circular cutting edge is used.  
     
     
         9 . A burr removing apparatus comprising: 
 a burr detector;    two cutters each having a circular cutting edge; and    a drive control mechanism for causing the cutters to approach to a burr in response to a burr detecting signal issued by said burr detector, disposing the cutters so that the following formula (1) are satisfied with respect to the burr and then moving the cutters along the lengthwise direction of the burr, wherein the two cutters are disposed across a steel piece;      R/ 2+ W/ 2<Δ< R−W/ 2  (1)   where, W shows the width of the burr, R shows the radius of the cutter, Δ shows the minimum distance from the center of the cutter to the center line of the width of the burr.    
     
     
         10 . A burr removing apparatus comprising: 
 a burr detector;    a plurality of at least two cutters; and    a drive control mechanism for causing the cutters to approach to a burr in response to a burr detecting signal issued by said burr detector, wherein two cutters of the plurality of cutters have a circular cutting edge and the two cutters having the circular cutting edge are disposed such that the centers thereof are separately located outwardly of both the edges of a steel piece which the burr intersects.