Tool path part program modification system of NC machine tool

1. 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.

2. The NC machine tool of claim 1 , wherein the part program further includes an interpretation start point code and an interpretation end point code configured to allow the NC kernel unit to recognize a start point and an end point of interpretation of the processing block.

3. A method implemented by a NC machine, comprising:

receiving, by a processor, a tool path part program having one or more processing blocks configured to automate and perform tool paths for processing a work piece;

interpreting the part program for each processing block;

generating processing block information according to the interpreted part program;

sequentially calling the processing block information;

modifying 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 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;

storing, in a tool path pattern modification data base, one or more modification processing block patterns corresponding to the consecutive rapid transfer processing block group;

extracting several modification processing block patterns corresponding to the consecutive rapid transfer processing block group from the tool path pattern modification data base;

selecting one of the extracted modification processing block patterns having the shortest tool path;

simulating the one selected extracted modification processing block pattern;

selecting the one simulated processing block pattern when a collision between the tool and the work piece does not occur in the simulation; and

performing, with the tool, the one selected simulated processing block pattern having the shortest tool path and that avoids a collision between the tool and the work piece.

4. The method of claim 3 , wherein the part program further includes an interpretation start point code and an interpretation end point code to allow recognizing of a start point and an end point of interpretation of each processing block.

5. The method of claim 4 , wherein the start point and the end point of the interpretation of each processing block limit the modifying of the consecutive non-cutting rapid transfer processing block group of the processing block information.

6. The method of claim 3 , further comprising:

discarding the one simulated processing block pattern when a collision between the tool and the work piece occurs in the simulation;

selecting a second pattern of the extracted modification processing block patterns having the second shortest tool path;

simulating the second processing block pattern;

selecting the second simulated processing block pattern when a collision between the tool and the work piece does not occur in the simulation; and

performing, with the tool attached to the NC machine, the second simulated processing block pattern having the second shortest tool path and that avoids a collision between the tool and the work piece.