Multifunctional structure solutions for Ultra High Precision (UHP) machine tools |
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| Authors: | F. Aggogeri A. Merlo M. Mazzola |
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| Affiliation: | 1. Department of Mechanical and Industrial Engineering, University of Brescia, Via Branze, 38, 25123 Brescia, Italy;2. Ce.S.I., Centro Studi Industriali, Via Tintoretto, 10, 20093 Cologno Monzese (MI), Italy;1. Academic Medical Center, University of Amsterdam, The Netherlands;2. Swammerdam Institute for Life Science, University of Amsterdam, The Netherlands;1. School of Mechanical Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China;1. Institute of Manufacturing Technology and Quality Management (IFQ), Otto-von-Guericke-University Magdeburg, Magdeburg, Germany;2. Machine Tool Laboratory (WZL), University of Aachen, Aachen, Germany;3. Institute of Production Management, Technology and Machine Tools (PTW), Technical University of Darmstadt, Darmstadt, Germany;4. Institute of Production Science (WBK), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany;5. Institute for Production Engineering and Laser Technology (IFT), Technical University of Vienna, Vienna, Austria;1. Professorship for Adaptronics and Lightweight Design, Technische Universität Chemnitz, 09111 Chemnitz, Germany;2. Fraunhofer Institute for Machine Tools and Forming Technology IWU, Nöthnitzer Straße 44, 01187 Dresden, Germany |
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| Abstract: | This paper aims to study innovative structure solutions for Ultra High Precision (UHP) Machine Tools (MT) within machining applications at micro/mesoscale level (10–10 000 μm range). There are many aspects that can affect the accuracy of UHP machining performance. The most important issues are related to the static, dynamic and thermal behaviour of the machines. This paper shows a complete study and thermal testing validation on a set of prototypes (plates and beam) based on sandwiches with core made of metal foam (open cells) material impregnated by phase change materials. The proposed multifunctional structure (which provides high stiffness to weight ratio, good damping properties together with thermal stability) consists of a machine tool part, a beam (Z-axis) of a precision milling machine. The authors have designed, realised and tested prototypes developing thermal trials and then evaluating the experimental data. The trials consisted to test the prototype thermal stability when the environmental temperature varies in a specified range (20–50 °C), in order to assess the PCM proprieties to absorb heat and maintain performances for a long duration. Furthermore, a numerical-experimental validation through finite element analysis on the beam prototype is presented. |
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