Uilize improved ant colony algorithm

introduce max min ant system and local search strategy

avoid precocity and stagnation problem appeared in ant colony algorithm

and improve speed and precision of algorithm computation

rational planning of body-in-white（ BIW） robot welding path and improve work efficiency of welding robot. Design robot welding spot planning program

and apply it to the bottom of BIW of a station. It can be seen from the simulation results

the improved ant colony algorithm is applied to BIW welding robot path planning

verify feasibility effectiveness of the algorithm.