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He adds these advances have the potential to usher in the next generation of robotic assistive devices like prostheses and exoskeletons that can enable the mobility-impaired to walk with ease.


The student team was led by graduate student Jake


Reher. The shoes were created by another graduate student, Eric Ambrose. Durus was designed in collaboration with the robotics division of SRI International (Menlo Park, CA) and the project is supported by the National Science Foundation.


A


Improving Milling Performance of Titanium Alloys


team at the University of Illinois (Champaign, IL) has presented new research exploring the effectiveness of the atomization-based cutting fluid (ACF) spray system in the end-milling of titanium alloys. In the first phase, experi- ments were carried out to select suitable spray parameters. A numerical model of the ACF spray system has also been


developed to gain a physics-based understanding of the cut- ting-fluid film formation on a rotating tool surface and its role in providing cooling and lubrication at the cutting interface. In the second phase, experiments have been conducted to compare the machinability of titanium for different cutting- fluid application methods, viz., dry cutting, flood cooling and the ACF spray system, on the basis of five machinability pa- rameters, including, tool life, tool wear, cutting forces, surface roughness and chip morphology. Experimental results show that the application of the ACF spray system results in uni- form tool flank wear, lower cutting forces and higher surface finish and the tool life extends up to 75% over flood cooling. Also, chip morphology analysis reveals that using the ACF spray system leads to the formation of shorter, thinner chips, as compared to those generated when flood cooling is used. The paper, authored by Surojit Ganguli and Shiv G.


Kapoor, was published in SME’s Journal of Manufacturing Processes and can be read online in its entirety here: http:// tinyurl.com/MachiningTitanium.


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