Research On Technology For Strip-Width-Maximazation Machining Based On Surface Trianglation

Calculating the minimum distance from a space point to a complex surface is very important, which can affect the efficiency and stability of interference detection and tool position optimization in NC machining apparently. The computational efficiency of the current triangulation method is too low to meet the needs of the NC programming. In order to solve the problem, a neighboring triangle method was proposed to reduce the computation time and improve its efficiency.In order to solve the key technologies in neighboring triangle algorithm, several different appropriate solutions were proposed. A program was developed using C++, through which an algorithm to calculate the minimum distance was obtained. Though analyzing and comparing the advantages and shortcomings of each solution, the optimal one was chosen. To different types of typical sculptured surface, the validity of the proposed method was verified. To different areas of the side surface, the stability of the proposed method was investigated. Several algorithms were compared in efficiency. Based on the proposed algorrithm, the simulation results of a sample were obtained.Under the UG CAM platform, the minimum distance from a space point to a complex surface was calculated with the neighboring triangle algorithm. According to the strip-width-maximization tool position optimization principle, the strip-width- maximization algorithm based on a triangulating surface was achieved. A simulation result was conducted in machining an aircraft sheet-forming-mold . With the proposed method , a characteristic curve on a tool surface could be calculated. an machining error simulation example was given to verify the possibility of the method in 5-axis machining simulation.