Grinding of cutting tools with wavy cutting edges
AssigneeAnca Pty Ltd
InventorWilhelm Gerhard Nienhaus
Life of this patent
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Abstract
A CNC tool grinding machine has at least one rotatable grinding wheel (1) movable relative to a workpiece (2) for grinding a flute surface (3) of a blade in the workpiece (2). The machine is programmed with a path for the grinding wheel (1) calculated to grind a smooth cutting edge (5) for the blade, and programmed with perturbations to the path which vary the movement of the grinding wheel (1) to grind a wavy cutting edge (6) in the workpiece. With such a machine, it is possible to grind all surfaces of a wavy cutting edge in a single set up rather than requiring two more grinding and milling operations to form the wavy cutting edge.
Claims56
A method of operating a CNC grinding machine to grind a blade with a cutting edge of wavy configuration in a workpiece, the CNC grinding machine having at least one rotatable grinding wheel movable relative to the workpiece, said method including:
- programming the CNC machine with at least one path for the at least one grinding wheel, the at least one path being calculated to grind at least one surface of a blade with a generally smooth cutting edge in the workpiece;
- and
- programming the CNC machine with perturbations to said at least one path, the perturbations varying the movement of the at least one grinding wheel in such a manner that the at least one grinding wheel is arranged to grind at least one surface of the blade with a cutting edge of a wavy configuration in the workpiece.
A method according to claim 28 wherein the angle and length functions are dependent on each other.
A CNC grinding machine having at least one rotatable grinding wheel movable relative to a workpiece for grinding at least one blade in the workpiece, the machine being programmed with at least one path for the at least one grinding wheel which is calculated to grind at least one surface of a blade with a generally smooth cutting edge, wherein the machine is programmed with perturbations to said at least one path, the perturbations varying the movement of the at least one grinding wheel from said at least one path in such a manner that the at least one grinding wheel grinds a blade with a cutting edge of wavy configuration in the workpiece.
A computer program for use with a CNC tool grinding machine having at least one rotatable grinding wheel movable relative to a workpiece for grinding a blade with a cutting edge of wavy configuration in the workpiece, the computer program comprising:
- path generating means to generate at least one path for said at least one grinding wheel, said at least one path being calculated to grind at least one surface of the blade with a generally smooth cutting edge in the workpiece;
- and
- path adjustment means which calculates perturbations to said at least one path, the perturbations being arranged to vary the movement of the at least one grinding wheel in such a manner that the at least one grinding wheel grinds at least one surface of the blade with a cutting edge of a wavy configuration.
Dependencies are inferred from the claim text.