Research On Path Planning For Laser Microhole Machining Of Printed Circuit Board

Laser machining is widely used in drilling technology of printed circuit board.Its efficiency and quality directly affect the benefit and performance of the productions.With the increasing number of microholes in printed circuit board,the block path planning method is easy to lead to a longer global machining path and lower machining efficiency.Therefore,in order to optimize the path planning of laser microhole machining on printed circuit board,this paper focuses on three aspects: path planning algorithm,parallel execution of path planning algorithm and motion scheme planning of laser machining equipment.Firstly,an ant colony optimization algorithm based on the improved strategy was proposed for the path planning of microhole machining,then the path planning algorithm was parallelized based on GPU general computing to improve the efficiency of the algorithm.Finally,the motion scheme planning method of laser machining equipment was designed based on B-spline interpolation method.The main research contents and results of this paper are as follows.1.Machining path planning based on improved strategies ant colony optimization algorithm.Analyze and compare the algorithm performance of the MAX-MIN ant system and ant colony system.In order to improve the performance of the algorithm,the implementation strategies of tabu list and node selection in the path construction process are improved.The improved algorithms are tested on traveling salesman probelms,and the results show that the proposed algorithm can effectively improve the computational efficiency and path solution quality compared with the original algorithm.2.Machining path planning based on GPU general computing.The application of the ant colony optimization algorithm is limited by the time cost.To solve this problem,the path planning algorithms are improved based on GPU general computing.The parallelization algorithms are tested on printed circuit board examples.The results show that the proposed algorithms can effectively reduce the time cost of the algorithm compared with the original algorithm.3.Motion scheme planning of laser machining equipment based on B-spline interpolation.The requirements of the motion scheme planning process of laser machining equipment is analyzed.In order to acquire the motion scheme table,a motion scheme planning method based on B-spline interpolation is designed.Firstly,the data points are generated from the machining path,then the motion path is generated by interpolation of data points.Finally,The motion scheme table of equipment is generated from machining path and motion path.The motion scheme planning method is tested on printed circuit board examples.The results show that the proposed method can obtain the required motion scheme table.