基于分层递阶模型的多轴加工过程分析与运动度量规划

针对复杂曲面多轴数控加工过程的复杂性，提出了一种面向多轴加工的分层递阶构造模型，即利用铣削过程的几何、运动学与力学模型综合分析多轴加工规律.切削工件几何模型采用深度元素法，通过分析刀具与工件接触区域，得到刀具在不同瞬时的轴向范围及沿轴向各微元的切入角和切出角，转换为铣削力模型所需的几何信息，同时运动学模型又为几何与力学模型提供计算依据.采用序列二次规划法优化进给速度，使机床工作在多个约束条件的最大范围值内.五轴螺旋桨加工实验表明，在满足加工精度条件下，优化的进给速度使零件加工效率提高约20%.

Analysis and Motion Planning for Multi-axis Machining Process Based on Hierarchical Model

For complex surface multi-axis machining process,a complete hierarchical model for multi-axis milling was presented.The geometric model,kinematics model and mechanistic model are integrated to analyse the machining methods.The method selected for geometric stock modeling is the dexel approach.The cutter workpiece engagement defines the instantaneous intersection boundary between the cutting tool and the in-process workpiece.From the CWE,the cutter entry-exit angles and depth of cuts are found and used to ca...