Structural Analysis And Performance Verify Of Direct-Drive A/C Axis Bi-Rotary Milling Head

Direct-drive A/C axis bi-rotary milling head has advantages of simple structure,short transmission chain, and high accuracy copared with mechanical bi-rotary milling head.The current domestic equipped with direct drive double pendulum angle milling basic dependence on imports. This situation has seriously hampered the development of ourcountry's high-end CNC machine tools.Through a wide range of research related to product development status and market positioning of products at home and abroad.This issue design a low-cost, high-performance milling head. Based on the establishment of five-axis milling's digital prototype. Analyse the mechanical structure of the milling head, the static mechanical properties, the modal characteristics.At first, research the development situation of direct drive dual-pendulum milling head both at home and abroad. Analyse the performance data of major manufacturers of milling head. Determine the milling head's design goal, explained the research's background, significance and research methods. Then, analyse the architecture of direct drive A/C axis bi-rotary milling head, illustrates the advantages of torque motor direct drive milling head. Application three-dimensional software to create model of the various components,assemble machines and inspect interference. Using finite element analysis software to do the statics analysis of milling head's important parts. Get the torsional deflection of A axis and C axis, calculate it static inflexibility. Analyse the milling head's weak links as spacer bush. Proposed the improvement plan to shorten the length of the spacer bush, improve milling head stiffness. Analyse the milling head's kinetics characteristics, obtained the top ten natural frequencies and mode shapes. Thus can control the outside the frequency of vibration force. Effectively avoid the corresponding vibration model of resonance. At last analyse the whole text of the research content, as to the milling head's thermal deformation analysis and error compensation to be further studied were also put forward. This paper research work was a part of the national science and technology major projects high-grade nc machine tools and basic manufacturing equipment. Issue number 2009ZX04011-012, this paper proposed the milling head improvement plan and performance testing methods have been used by enterprise. Established the theory and experiment foundation on improve the double angular milling head performance.