An image-based methodology to establish correlations between porosity and cutting force in micromilling of porous titanium foams
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- 作者：M. Abolghasemi Fakhri (12)
E. V. Bordatchev (12)
O. R. Tutunea-Fatan (1) rtutunea@eng.uwo.ca - 关键词：Porous titanium foam – ; Optical imaging – ; Image processing – ; Porosity – ; Micromilling – ; Cutting force
- 刊名：The International Journal of Advanced Manufacturing Technology
- 出版年：2012
- 出版时间：June 2012
- 年：2012
- 卷：60
- 期：9-12
- 页码：841-851
- 全文大小：990.3 KB
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24. Abolghasemi Fakhri M., Bordatchev EV, Tutunea-Fatan, OR (2011) Evaluation of the relative effect of process parameters on porosity-cutting force correlation in micromilling of porous titanium, under revision for Machining Science and Technology. - 作者单位：1. Department of Mechanical and Materials Engineering, The University of Western Ontario, London, ON N6A 5B9, Canada2. Centre for Automotive Materials and Manufacturing, Industrial Materials Institute, National Research Council of Canada, 800 Collip Circle, London, ON N6G 4X8, Canada
- 刊物类别：Engineering
- 刊物主题：Industrial and Production Engineering
Production and Logistics
Mechanical Engineering
Computer-Aided Engineering and Design - 出版者：Springer London
- ISSN：1433-3015
文摘
Porous titanium foam is now a standard material for various dental and orthopedic applications due to its light weight, high strength, and full biocompatibility properties. In practical biomedical applications, outer surface geometry and porosity topology significantly influence the adherence between implant and neighboring bone. New microfabrication technologies, such as micromilling and laser micromachining opened new technological possibilities for shape generation of this class of products. Besides typical geometric alterations, these manufacturing techniques enable a better control of the surface roughness that in turn affects to a large extent the friction between implant and surrounding bone tissue. This paper proposes an image analysis approach for optical investigation of the porosity that is tailored to the specifics of micromilling process, with emphasis on cutting force monitoring. According to this method, the area of porous material removed during micromilling operation is estimated from optical images of the micromachined surface, and then the percentage of solid material cut is calculated for each tool revolution. The employment of the aforementioned methodology in micromilling of the porous titanium foams revealed reasonable statistical correlations between porosity and cutting forces, especially when they were characterized by low-frequency variations. The developed procedure unlocks new opportunities in optimization of the implant surface micro-geometry, to be characterized by an increased roughness with minimal porosity closures in an attempt to maximize implant fixation through an appropriate level of bone ingrowth.