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双主轴数控机床工作台动静强度分析
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Abstract:
双主轴数控机床是一种具有两个独立的加工主轴的先进数控机床。本文以某机床厂研发的G650双主轴数控机床工作台为研究对象，采用CAD软件建立了其三维模型，并采用有限元法及其软件对工作台进行了静力学分析和模态分析，研究了工作台在铣削加工状态下的静力学特性和约束状态下的模态特性。通过分析结果可知，工作台的最大形变约2.30 μm、最大应力约9.78 MPa，前四阶固有频率分别为952.86 Hz、1003.30 Hz、1360.60 Hz、1428.90 Hz。分析结果表明了该工作台能确保待加工零件的加工精度和定位精度，为后续的优化设计工作奠定了基础。
Double spindle CNC machine tool is an advanced CNC machine tool with two independent machining spindles. This paper takes the table of G650 double spindle CNC machine tool developed by a machine tool factory as the research object, establishes its three-dimensional model by using CAD software, and carries out static analysis and modal analysis of the table by using the finite element method and its software to study the static characteristics of the table in the milling machining state and the modal characteristics of the constrained state. It was found that the maximum deformation of the panel was approximately 2.30 μm, the maximum stress was approximately 9.78 MPa and the first four eigenfrequencies were 952.86 Hz, 1003.30 Hz, 1360.60 Hz and 1428.90 Hz. The analysis results show that the table can ensure the machining accuracy and positioning accuracy of the parts to be machined, which lays the foundation for the subsequent optimisation design work.
| [1] | 刘强. 数控机床发展历程及未来趋势[J]. 中国机械工程, 2021, 32(7): 757-770. |
| [2] | 杨兆军, 何佳龙, 刘志峰, 等. 数控机床可靠性技术新进展[J]. 机械工程学报, 2023, 59(19): 152-163. |
| [3] | 梁迎春, 陈国达, 孙雅洲, 等. 超精密机床研究现状与展望[J]. 哈尔滨工业大学学报, 2014, 46(5): 28-39. |
| [4] | 傅建中, 姚鑫骅, 贺永, 等. 数控机床热误差补偿技术的发展状况[J]. 航空制造技术, 2010(4): 64-66. |
| [5] | 邓小雷, 林欢, 王建臣, 等. 机床主轴热设计研究综述[J]. 光学精密工程, 2018, 26(6): 1415-1429. |
| [6] | Wei, X., Feng, X., Miao, E., Qian, M. and Pan, Q. (2022) Sub-Regional Thermal Error Compensation Modeling for CNC Machine Tool Worktables. Precision Engineering, 73, 313-325. https://doi.org/10.1016/j.precisioneng.2021.10.007 |
| [7] | 吕学祜, 郭前建, 王昊天, 等. 数控机床误差补偿关键技术综述[J]. 航空制造技术, 2022, 65(11): 104-111, 119. |
| [8] | Ibaraki, S., Yoshida, I. and Asano, T. (2019) A Machining Test to Identify Rotary Axis Geometric Errors on a Five-Axis Machine Tool with a Swiveling Rotary Table for Turning Operations. Precision Engineering, 55, 22-32. https://doi.org/10.1016/j.precisioneng.2018.08.003 |
| [9] | Wei, X., Miao, E., Liu, H., Liu, S. and Chen, S. (2018) Two-Dimensional Thermal Error Compensation Modeling for Worktable of CNC Machine Tools. The International Journal of Advanced Manufacturing Technology, 101, 501-509. https://doi.org/10.1007/s00170-018-2918-5 |
| [10] | Wang, X., Liu, B., Mei, X., Yun, X., Li, X., Li, Q., et al. (2021) Genetic Algorithm for Dynamic Parameters Estimation of the Machine Tool Worktable Using the Residual Vibration Signal. Journal of Vibration and Control, 28, 1433-1440. https://doi.org/10.1177/1077546321993579 |
| [11] | Zhang, H., Liu, H., Du, C., lv, D., Zhang, J. and Zhao, W. (2018) Dynamics Analysis of a Slender Ball-Screw Feed System Considering the Changes of the Worktable Position. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 233, 2685-2695. https://doi.org/10.1177/0954406218799781 |
| [12] | 张松伟. 基于数字孪生的数控机床工作台进给系统机械故障诊断研究[D]: [硕士学位论文]. 西安: 西安理工大学, 2023. |
| [13] | 王信, 王用, 沈涛. 基于有限元分析的机床工作台轻量化设计研究[J]. 机械工程与自动化, 2023(1): 76-77, 80. |
| [14] | 李信言. 基于迭代学习控制的电液机床工作台控制方法研究[J]. 液压气动与密封, 2020, 40(8): 39-43. |
| [15] | 薛文虎. 基于振动信号的数控机床工作台进给系统机械故障诊断研究[D]: [硕士学位论文]. 兰州: 兰州理工大学, 2022. |
| [16] | 陈丁, 康献民, 余为洲. 机床工作台模态分析及拓扑优化[J]. 机械工程师, 2020(2): 23-25. |
| [17] | 刘献礼, 陈涛. 机械制造中的低碳制造理论与技术[J]. 哈尔滨理工大学学报, 2011, 16(1): 1-8. |
