Welding is a very important step in making the car body in white. The welding quality is good or not acts crucial role to the car quality. But a robot has many welding points to weld, how to look for a route that all over all the welding points. And look for a route of shortest distance and shortest time. It means great to improving the working efficiency of the welding robot.But the way and the theory used in doing the welding route planning in our country's auto factory does not reach the advanced level o...