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stronger stamped designs may meet the new structure and packaging needs, but typically at a mass penalty. Increased material strength is only valuable if the geom- etry of the section can support it. As Gericke concludes, hydroform tubes are a good way to execute this geometry and can be readily integrated into the vehicle. More information on the concept will be provided in


SME’s Motorized Vehicle Manufacturing Yearbook, to be published in July.


anufacturing accurate medical models from Digital Imaging and Communication in Medicine (DICOM) images is very useful for complex surgeries. DICOM images are translated into stereolithography (STL) files, which are then used to print medical models using rapid prototyping. However, there’s always the possibility of defects, such as


M


Improving STL File Accuracy for Medical Models


inaccuracy and rough surface finish, due to errors in the STL file. To correct for this, researchers at the National Institute of Technology in Waranagal, India proposed using a Fast Fourier Transform (FFT) algorithm that relies on interpolation and mesh construction methods and ensured a smoother STL file. In their study, the algorithm reduced dimensional error by 57% and increased surface finish by 20% compared to the ini- tial STL file. They also proposed that the algorithm could also be applied to trimming and hole-filling operations in STL files. The paper, authored by A. Manmadhachary, Y. Ravi


Kumar, and L. Krishnanand, was published in Volume 21 of SME’s Journal of Manufacturing Processes. The full text can be read online at http://tinyurl.com/SmootherSTL.


SME’s authoritative peer-reviewed research journals, Journal of Manufacturing Processes, Journal of Manufacturing Systems, and Manufacturing Letters, and technical papers may be reached via www.sme.org/publications. The journals welcome submissions: Information available at www.sciencedirect.com/sme.


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