Therefore , it is very important to reduce thermal deformation and improve the machining accuracy in the design of machine tools , hi this paper , thermal characteristics of xk717 cnc milling machine are analyzed by using the finite element method , supported by a key project of zhejiang province 本课题结合浙江省重大科技招标资助项目(大型高效数控模具加工机床关键技术研究) ，在设计阶段，使用有限元方法，对xk717数控铣床进行热特性研究，并根据研究计算的结果进行评价，最终达到设计目标。
( 6 ) an internet - based virtual machining system , which is the integration of the image - based virtual workshop and the model - based virtual cnc milling machine , is constructed using the reposition method to achieve the visual consistency of the virtual objects and images . this system combines the advantages of image - based vr and model - based vr . consequently , this system has both high rendering quality and good real - time interactivity , and thus has a very good application perspective （ 6 ）提出并实现了的映射对应方法，以解决图象与建模相结合的虚拟武汉理工大学博士学位论文现实所面临的视觉一致性问题，实现了图象与建模相结合的虚拟加工环境，该系统结合了基于图象的方法与基于建模的方法的优点，既有很好的真实感和实时性，又有很好的交互性，有很好的应用前景。
At the same time the paper provides an electric drawing and a control flow diagram which can be used in cnc milling machines for accomplishing a constant power control and cutting tool ' s monitoring and protection . by this way , it can reduce the cost and enhance efficiency during the machining operations 同时还给出了智能监控装置的电气原理图和控制流程图使得该装置能够在数控铣床上完成恒功率控制和刀具的监控与保护功能以达到提高机床的加工效率降低生产成本的目的。
