Off-line feed rate scheduling for reduction of machining time and enhancement of machining accuracy in CNC machining

An off-line feed rate scheduling method for adjusting a cutting force of a CNC machining process that is performed according to workpiece geometry and a given set of NC code provided from a CAD/CAM system, the method comprising:

• inputting a reference cutting force;
• estimating a cutting configuration where a maximum cutting force occurs through ME Z-map modeling;
• receiving the estimated cutting configuration and estimating a specific rotation angle where the maximum cutting force occurs through cutting force modeling;
• calculating a feed rate that satisfies the reference cutting force at the estimated specific rotation angle;
• and
• applying the calculated feed rate to the NC code.

An off-line feed rate scheduling method for adjusting a machined surface error of a CNC machining process that is performed according to workpiece geometry and a given set of NC code provided from a CAD/CAM system, the method comprising:

• inputting a reference surface error;
• estimating a cutting configuration where a maximum surface error occurs through ME Z-map modeling;
• receiving the estimated cutting configuration and estimating a specific rotation angle where the maximum surface error occurs through machined surface error modeling;
• calculating a feed rate that satisfies the reference surface error at the estimated specific rotation angle;
• and
• applying the calculated feed rate to the NC code.