The Dynamic Analysis And Optimizing Of The Numerical Control Milling Machine's Components

With the rapidly development of Numerical Control machine tools in higher speed, higher precision and higher flexibility, besides the requirement of machine's weight being light, lower cost, convenient application and good technical capability, higher and higher machining capability is also demand. Machining capability includes machining quality and cutting efficiency. Machine's machining capability is usually assessed by the tiptop precision and superficial roughness that can be reached of the being processed part. The cutting efficiency is usually assessed by the most limit value of removal rate or cutting dosage. And machining capability is closely correlation with machine's dynamic capability. It is proved that the demand of machine's dynamic capability is higher and higher with the improvement of machining capability.Study and engineering application of dynamic optimal design for machine tool's structure has been made more progress at home and board. But a lot of theoretical and technical problems still have not been solved involving optimun designing the numerical control milling machine tool aimed at improving its machining precision. So the paper is mainly about changing the layout of partition walls to make dynamic analysis and optimizing of the machine's bed and pillar, the sensitivity analysis of mode frequency for the partition walls' (or wainscot's) thickness as well as the dynamic analysis on whole machine. All these works are based on a key project of Zhejiang province. Six chapters are included in this paper.In chapterl, the background and meaning of the project as well as the develop trends at home and board are introduced. Main content is also summarized.