This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Stiffness of Structures and Drives in Fast Milling Machines
Technical Paper
1999-01-2273
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A stiffness requirement for high speed milling machines is determined by examining the stiffness of current generation high speed spindles. The desire for stability against chatter dictates that the stiffness of the machine structure and drives, when reflected to the tool tip exceed the spindle/tool holder/tool stiffness. The stiffness characteristics of a classical serial machine tool designed expressly for high speed milling are shown. Another potential design for high speed machining applications, the parallel kinematic or hexapod structure is also examined. It is found that hexapod structures exhibit lower structural stiffness than can be achieved in serial machines when using the same drive components. Furthermore, the stiffness of the hexapod structure varies widely across the workspace, leading to difficulties in control and limiting the achievable accuracy. Theoretically derived stiffnesses are compared with experimentally measured stiffnesses for two hexapod machines and are found to show good agreement.
Authors
Topic
Citation
Tlusty, J., Ziegert, J., and Ridgeway, S., "Stiffness of Structures and Drives in Fast Milling Machines," SAE Technical Paper 1999-01-2273, 1999, https://doi.org/10.4271/1999-01-2273.Also In
References
- Tlusty, J. Smith, S. Badrawy, S. J. Smith, D. A. Smith, A. P. 1997 Design of a High Speed Milling Machine for Aluminum Aircraft parts ASME Mfg. Sc. & Eng 2 6-2 323 332
- Weck, M. Giesler, M. Meylahn, A. Stainmer, D. 1998 Parallel Kinematics - the Importance of Enabling Technologies 1 st European - American Forum on Parallel Kinematics Machines, CNR-ITIA
- Heisel, V. 1998 Precision Requirements o s f t Hexapod Machines and Investigation Results 1 st European - American Forum on Parallel Kinematics Machines, CNR-ITIA
- Lee, J. Duffy, J. Hunt, K. H. 1998 A Practical Quality Index Based on the Octahedral Manipulator The International Journal of Robotics Research, 17/ 10:1081-1090
- Griffis, M. W. 1991 Kinestatic Control: A Novel Theory for Simultaneously Regulating Force and Displacement PhD Dissertation University of Florida
- Hardage, D.S. Wiens, G.J. 1999 Modal Analysis and Modeling of a Parallel Kinematic Machine submitted for publication in 1999 IMECE Proceedings of the ASME: Manufacturing Science and Engineering Nashville, TN November 14-19 6
- Clinton, C.M. Zhang, G. Stiffness Modeling of a Stewart-Platform Based Milling Machine Transactions of NAMRI/SME, V. XXV 1997 335 340