This paper describes the modeling and simulation of the axis of a five axis machining center for high-speed milling. The axis consists of a mechanical structure: machine head and electro-mandrel, a CNC system interfaced with the feed drive, and a pneumatic system to compensate for the weight of the vertical machine head. These subsystems were studied and modeled by means of: (1) finite element method modeling of the mechanical structure; (2) a concentrated parameter model of the kinematics of the axis; (3) a set of algebraic and logical relations to represent the loop CNC- feed drive; (4) an equation set to represent the functioning of the pneumatic system; and (5) a specific analytical model of the friction phenomena occurring between sliding and rotating mechanical components. These modeled subsystems were integrated to represent the dynamic behavior of the entire axis. The model was translated in a computer simulation package and the validation of the model was made possible by comparing the outputs of simulation runs with the records of experimental tests on the machining center. The firm which promoted and financed the research now has a virtual tool to design improved machine-tool versions with respect to present models, designed by traditional tools.
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e-mail: giovanni.tani@mail.ing.unibo.it
e-mail: raffaele.bedini@unifi.it
e-mail: alessandro.fortunato@mail.ing.unibo.it
e-mail: claudio.mantega@mail.ing.unibo.it
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August 2007
Technical Papers
Dynamic Hybrid Modeling of the Vertical Axis in a High-Speed Machining Center: Towards Virtual Machining
Giovanni Tani,
Giovanni Tani
DIEM: Department of Mechanical Construction Engineering,
e-mail: giovanni.tani@mail.ing.unibo.it
University of Bologna
, viale Risorgimento 2, 40136 Bologna, Italy
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Raffaele Bedini,
Raffaele Bedini
DMTI: Department of Mechanical and Industrial Technologies,
e-mail: raffaele.bedini@unifi.it
University of Florence
, via di Santa Marta 3, 50139 Firenze, Italy
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Alessandro Fortunato,
Alessandro Fortunato
DIEM: Department of Mechanical Construction Engineering,
e-mail: alessandro.fortunato@mail.ing.unibo.it
University of Bologna
, viale Risorgimento 2, 40136 Bologna, Italy
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Claudio Mantega
Claudio Mantega
DIEM: Department of Mechanical Construction Engineering,
e-mail: claudio.mantega@mail.ing.unibo.it
University of Bologna
, viale Risorgimento 2, 40136 Bologna, Italy
Search for other works by this author on:
Giovanni Tani
DIEM: Department of Mechanical Construction Engineering,
University of Bologna
, viale Risorgimento 2, 40136 Bologna, Italye-mail: giovanni.tani@mail.ing.unibo.it
Raffaele Bedini
DMTI: Department of Mechanical and Industrial Technologies,
University of Florence
, via di Santa Marta 3, 50139 Firenze, Italye-mail: raffaele.bedini@unifi.it
Alessandro Fortunato
DIEM: Department of Mechanical Construction Engineering,
University of Bologna
, viale Risorgimento 2, 40136 Bologna, Italye-mail: alessandro.fortunato@mail.ing.unibo.it
Claudio Mantega
DIEM: Department of Mechanical Construction Engineering,
University of Bologna
, viale Risorgimento 2, 40136 Bologna, Italye-mail: claudio.mantega@mail.ing.unibo.it
J. Manuf. Sci. Eng. Aug 2007, 129(4): 780-788 (9 pages)
Published Online: February 13, 2007
Article history
Received:
November 28, 2005
Revised:
February 13, 2007
Citation
Tani, G., Bedini, R., Fortunato, A., and Mantega, C. (February 13, 2007). "Dynamic Hybrid Modeling of the Vertical Axis in a High-Speed Machining Center: Towards Virtual Machining." ASME. J. Manuf. Sci. Eng. August 2007; 129(4): 780–788. https://doi.org/10.1115/1.2738097
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