Study on smint NC processor which includes milling process model for process prediction to buill the next generation of machine tools

1.基于体素模型的加工形状模拟器为了预测加工过程中材料形状的变化，开发了基于体素模型的加工形状模拟器。通过在体素模型中引入八叉树结构来精确地表示材料形状，可以减少体素的总量(计算机的内存使用量)，从而实现实际的加工形状模拟。更有甚者。利用体素模型的特点，成功地实现了五轴联动控制加工的加工形状仿真。为了预测加工过程中切削力的变化，研制了一种端铣切削力模拟器。经验证，无论是方立铣刀还是球头立铣刀，在各种切削条件下的切削力预测值均与实测值吻合较好。此外，还进行了虚拟加工仿真，显示了…的变化更多的材料形状和切削力在铣削操作中。已经实现了。五轴机床工艺设计支持系统为有效利用五轴机床的性能，开发了一套工艺设计支持系统，辅助确定适合五轴机床的刀位。工艺设计支持系统通过应用材料和模具形状的体素模型表达，快速进行碰撞检查和刀具轨迹生成。验证了该方法可以有效地确定适合五轴联动机床的刀位。利用自主机床的反应调度为了实现智能数控处理器对自主机床的灵活操作，开发了一种能够根据观察到的机床状态动态改变加工作业计划的反应调度系统。通过计算实验证实，加工作业计划能够根据加工次数的变化和差异灵活地进行更新。较少

1. Machining shape simulator based on Voxel modelIn order to predict the change of material shape during machining operation, a machining shape simulator based on the Voxel model was developed. By introducing the Oct-tree structure into the Voxel model to represent a material shape precisely, the total amount of the Voxel (memory usage of the computer) can be reduced to realize a practical machining shape simulation. Moreover. the machining shape simulation of five-axis controlled machining can be achieved successfully utilizing the feature of the Voxel model.2. Cutting force simulator of endmilling operationIn order to predict the change of cutting force during machining operation, a cutting force simulator for endmilling operation was developed. It was verified that the predicted cutting forces in several cutting conditions have good agreement with the measured one for both the square end mill and the ball end mill. In addition, a virtual machining simulation, which shows the change … More of material shape and cutting force during milling operation. was achieved.3. Process planning support system for 5-axis machine toolIn order to utilize the performance of 5-axis machine tools effectively a process planning support system, which assists to determine the suitable tool posture for 5-axis machine tools, was developed. The process planning support system is designed to perform the collision check and the tool path generation quickly by applying Voxel model expression of the material and the tooling shapes. It is verified that the suitable tool posture for 5-axis machine tools can be determined effectively.4. Reactive scheduling utilizing for autonomous machine toolIn order to achieve flexible operation of the autonomous machine tool with a smart NC processor, a reactive scheduling system which is able to change the machining operation schedule dynamically according to the observed situation of machine tools was developed. It was confirmed that the machining operation schedule was flexibly updated to the change and the difference of operation times by the computational experiment. Less