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Application of Design Aspects in Uniaxial Loading Machine Development
Published on: September 19, 2018
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Vibration Damping Analysis of Lightweight Structures in Machine Tools.
Francesco Aggogeri1, Alberto Borboni2, Angelo Merlo3
1Department of Mechanical and Industrial Engineering, University of Brescia, via Branze, 38, 25123 Brescia, Italy. francesco.aggogeri@unibs.it.
Materials (Basel, Switzerland)
|August 5, 2017
Summary
Lightweight hybrid materials like aluminum foam sandwiches (AFS) significantly enhance machine tool (MT) performance by reducing vibrations. AFS prototypes offer 20x greater damping than steel, ideal for high-speed finishing operations.
Area of Science:
- Materials Science and Mechanical Engineering
- Manufacturing Technology
- Vibration Analysis
Background:
- Machine tool (MT) dynamic behavior critically impacts machining performance and workpiece quality.
- Lightweight structures offer potential for vibration reduction and improved precision in MTs.
- Hybrid materials present an opportunity to enhance the dynamic characteristics of MT moving parts.
Purpose of the Study:
- To present and compare hybrid materials for fabricating MT moving parts.
- To evaluate prototypes made of aluminum foam sandwiches (AFS), aluminum corrugated sandwiches (ACS), and carbon fiber-reinforced polymer (CFRP) composites.
- To assess the static and dynamic properties of these novel materials for MT applications.
Main Methods:
- Development of prototypes representing the Z-axis ram of a milling machine.
- Finite element (FE) simulations to analyze static and dynamic properties.
- Experimental tests to validate simulation results and material performance.
Main Results:
- AFS prototypes demonstrated a damping ratio 20 times greater than conventional steel, ideal for high-speed finishing.
- CFRP structures achieved high stiffness with a 48.5% weight reduction, suitable for energy-saving roughing operations.
- ACS structures offer a balanced combination of stiffness and damping, presenting another viable alternative.
Conclusions:
- The evaluated hybrid materials (AFS, ACS, CFRP) are viable alternatives to conventional MT materials.
- These materials can enhance machining performance, reduce vibrations, and improve workpiece quality.
- Specific material choices (AFS, CFRP, ACS) offer distinct advantages for different machining operations (finishing, roughing).
Keywords:
CFRP materialsFE simulationsaluminium corrugated sandwichesaluminium metal foamsdampinghybrid materialsmachine tool kinematicsmachine tool structuresmodal analysisMore Related Videos
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