人工势场法的复杂光学曲面加工最优路径求解

Solving the optimal path of complex optical surface machining by artificial potential field method

加工路径对于复杂光学曲面表面质量与工件光学性能具有重要影响,为此,研究人工势场法的复杂光学曲面加工最优路径求解方法,提高加工质量,并满足实际应用需求。依据等残高条件,确定复杂光学曲面加工的刀位点;以该刀位点为人工势场法求解最优加工路径时的目标点;通过在人工势场斥力场函数内引入相对速度斥力势场,改进斥力场函数,利用引力势力场函数与改进斥力场函数,确定各刀位点的合力;依据各刀位点的合力决定刀具的进给方向,即复杂光学曲面的最优加工路径。实验证明:该方法的加工精度最高为98.15%,可有效确定复杂光学曲面的刀位点,完成最优加工路径求解;应用该方法加工的复杂光学曲面工件表面粗糙度较低,加工质量较高。

The machining path has an important effect on the surface quality of complex optical surfaces and the optical properties of the workpiece.Therefore,the optimal path solution method of artificial potential field method is studied to improve the machining quality and meet the practical application requirements.According to the condition of equal residual height,the cutter point of complex optical surface machining is determined.The cutter point is taken as the target point when the artificial potential field method is used to solve the optimal machining path.By introducing the relative velocity repulsion field into the repulsion field function of artificial potential field,the repulsion field function is improved,and the resultant force of each cutter point is determined by using the gravitational force field function and the improved repulsion field function.According to the resultant force of each cutter point,the feed direction of the tool is determined,that is,the optimal machining path of the complex optical surface.Experimental results show that the machining accuracy of this method is 98.15%,which can effectively determine the cutter point of complex optical surface and solve the optimal machining path.The surface roughness of complex optical surfaces machined by this method is lower and the machining quality is higher.