Tool path part program modification system of NC machine tool

A NC machine tool, comprising:

• a human-machine interface unit configured to receive a tool path part program having one or more processing blocks configured to automate and perform tool paths for processing a work piece;
• an NC kernel unit configured to:
• interpret the part program inputted to the human-machine interface unit for each processing block;
• and
• generate processing block information according to the part program interpreted by the NC kernel unit;
• and
• a tool path modification module unit configured to:
• sequentially call the processing block information generated by the NC kernel unit;
• and
• modify a consecutive non-cutting rapid transfer processing block group of the processing block information such that tool paths are reduced and collision between a tool of the NC machine tool and the work piece does not occur, when the consecutive non-cutting rapid transfer processing block group is present in which a predetermined reference number or more of processing blocks including non-cutting rapid transfer commands are consecutively included;
• a tool path pattern modification data base in which one or more modification processing block patterns are stored corresponding to the consecutive rapid transfer processing block group;
• the tool path modification module unit further configured to:
• extract several modification processing block patterns corresponding to the consecutive rapid transfer processing block group from the tool path pattern modification data base;
• and
• select one of the extracted modification processing block patterns having the shortest tool path;
• a simulator unit configured to simulate the one selected extracted modification processing block pattern;
• the tool path modification module unit further configured to select the one selected simulated processing block pattern when a collision between the tool and the work piece does not occur in the simulation;
• and
• the tool configured to perform the one selected modification processing block pattern having the shortest tool path and that avoids a collision between the tool and the work piece.