Method and apparatus for sharpening scalloped-edge blades
AssigneePhilip Morris Incorporated
InventorJ. Lee Gregory
Life of this patent
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Abstract
A sharpening apparatus for sharpening scalloped-edged blades in a carton slitting machine includes at least two rotating cylindrical hones mounted on a pneumatically controlled actuator. A sharpening operation is initiated by a machine operator as needed to maintain blade sharpness, and is performed automatically by the apparatus controls. The actuator positions the rotating hones in contact with opposing sides of a cutting edge of the slitting blade as the blade moves past the hones at reduced speed. A first hone is rotated in a direction opposite to the direction of the blade and a second hone is rotated in the same direction of the blade. During sharpening, the hones execute several reciprocating axial movements to stroke the blade.
Claims23
A method for sharpening a band blade in a machine, comprising the steps of:
- running a band blade in a machine at a sharpening speed;
- rotating a first cylindrical hone so that a surface of the first hone is moving counter to the blade direction;
- rotating a second cylindrical hone so that a surface of the second hone is moving in the blade direction;
- moving the first and second hones in a direction transverse to a blade length and parallel to a blade width;
- moving the first and second hones relative to a cutting edge of the blade to contact one side of the cutting edge at a preselected sharpening angle with the first rotating hone for sharpening the cutting edge to contact an opposing side of the cutting edge at a preselected angle with the second rotating hone for deburring the cutting edge;
- and,
- moving the hones in repeated reciprocal movements transverse to the blade direction to stroke the cutting edge as to hones rotate.
An apparatus for sharpening an endless band blade in a slitting machine, comprising:
- a frame mountable on a slitting machine;
- a first actuator, mounted on the frame, for movement transverse to a blade length direction and parallel to a blade width direction;
- a second actuator mounted to the first actuator for movement relative to a blade cutting edge plane;
- a first cylindrical rotatable hone attached to the second actuator and extending in the blade width direction;
- a second cylindrical rotatable hone attached to the second actuator and extending in the blade width direction;
- means for rotating the first and second hones;
- means for controlling the first actuator for repeated reciprocating movement of the second actuator and the first. and second hones;
- and,
- means for controlling the second actuator so that movement of the second actuator in a first direction causes the first and second hones to move into contact with a cutting edge of the blade for sharpening and movement in a second direction causes the first and second hones to move out of contact with the cutting edge.
Dependencies are inferred from the claim text.