Eigenfrequency simulation for a roller screw used at feed system for ultrasonically aided micro-electrical discharge machining
| Autor: | Bogdan-Ionut Cristea, Liviu Daniel Ghiculescu, Cristian Deopale |
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| Rok vydání: | 2022 |
| Zdroj: | IOP Conference Series: Materials Science and Engineering. 1235:012047 |
| ISSN: | 1757-899X 1757-8981 |
| Popis: | The current paper focuses on the problem of resonance between the own frequency (eigenfrequency) of the roller screw and the loads attached to it, and the frequency used by the command of the feed system to actuate the stepping motor in the process of ultrasonically aided micro-electrical discharge machining. If the roller screw assembly enters resonance, meaning equality of own frequency and the actuating frequency, it starts to vibrate with uncontrollable amplitude, introducing instability of the machining process. The frequency at which the command system operates is limited to a minimum of 50 Hz (for technological machining) and a maximum of 30 000 Hz (for rapid feed), limited by the maximum torque of the motor. The main frequencies in the operating domain are simulated in Comsol, to see if the roller screw resonates with the command system. The vibrations modes were also simulated, focusing on the torsional vibrations, induced by the command of the feed system, the case of this study. The results pointed out that the roller screw does not enter resonance. |
| Databáze: | OpenAIRE |
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