基于约束与尺寸混合驱动的虚拟数控机床技术  

Virtual NC Machine Tool Technology Based on Constrain and Dimension Driven

作　　者：王福元[1,2] 徐家文[1] 

机构地区：[1]南京航空航天大学,南京210016 [2]盐城工学院,盐城224051

出　　处：《中国机械工程》2010年第15期1805-1808,1819,共5页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50675103);江苏省高校自然科学基础研究项目(08KJB460007)

摘　　要：提出了一种虚拟数控机床设计方法。该方法首先建立虚拟数控机床模型,在机床运动部件中的主动与从动件之间建立约束关系,采用组件矩阵变换技术对主动部件的位姿矩阵进行变换,驱动部件运动;再利用WAVE技术在刀具与工件之间建立链接,实现切割运算,去除工件材料;最后采用插补技术对加工路径进行计算,得到各个运动轴的进给量,用它驱动机床运动轴运动,模拟加工过程。将虚拟数控机床技术运用于整体叶轮叶片电解加工,利用该技术建立了五坐标数控机床模型,并用它完成叶片加工过程模拟、运动干涉检查、加工自动编程等工作,有效地提高了工作效率与加工自动化程度。In order to solve the design problems of virtual NC machine tool. A design method on virtual NC machine tool was presented herein. Firstly, the machine tool assembly model was established and the constrain relations between the driving parts and the driven parts were set up. Then, the matrix transform technology was used to change the posture of the component and the wave technology was employed to copy and link the tool model, so as to make intersection operation between the work piece and tool and remove the material of the work-piece. To simulate the processing, an interpolation technology was utilized to compute and assign the displacements of the motion axes. According to the displacements the motion axes were driven. Consequently they formed the machining movement. The technologies were applied in the electrochemical machining of the blade of integral impeller. Therefore, a five-axis linkage virtual NC machine tool model was created and used to simulate the processing, check motion interface and produce NC program. The application results show that the virtual machine tool technology effectively improves work efficiency and increases the level of processing automation.

关 键 词：虚拟机床 尺寸驱动 装配模型 约束驱动 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]