Abstract
Metal fibers have been widely used in many industrial applications due to their unique advantages. In certain applications, such as catalyst supports or orthopedic implants, a rough surface or tiny outshoots on the surface of metal fibers to increase surface area are needed. However, it has not been concerned about the surface morphologies of metal fiber in the current research of metal fiber manufacturing. In this paper, a special multi-tooth tool composed of a row of triangular tiny teeth is designed. The entire cutting layer of multi-tooth tool bifurcates into several thin cutting layers due to tiny teeth involved in cutting. As a result, several stainless steel fibers with periodic micro-fins are produced simultaneously. Morphology of periodic micro-fins is found to be diverse and can be classified into three categories: unilateral plane, unilateral tapering and bilateral. There are two forming mechanisms for the micro-fins. One is that periodic burrs remained on the free side of cutting layer of a tiny tooth create micro-fins of stainless steel fiber produced by the next neighboring tiny tooth; the other is that the connections between two fibers stuck together come to be micro-fins if the two fibers are finally detached. Influence of cutting conditions on formation of micro-fins is investigated. Experimental results show that cutting depth has no significant effect on micro-fin formation, high cutting speed is conducive to micro-fin formation, and feed should be between 0.12 mm/r and 0.2 mm/r to reliably obtain stainless steel fiber with micro-fins. This research presents a new pattern of stainless steel fiber characterized by periodic micro-fins formed on the edge of fiber and its manufacturing method.
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Supported by National Natural Science Foundation of China (Grant No. 51375176), Guangdong Provincial Natural Science Foundation of China (Grant No. 2014A030313264), and Fundamental Research Funds for the Central Universities, SCUT, China (Grant No. 2013ZZ017)
TANG Tao, born in 1990, is currently a master candidate at Key Laboratory of Surface Functional Structure Manufacturing of Guangdong Higher Education Institutes, South China University of Technology, China. She received her bachelor degree from South China University of Technology, China, in 2008. Her research interests include metal cutting and heat transfer enhancement.
WAN Zhenping, born in 1971, is currently a professor and a PhD candidate supervisor at South China University of Technology, China. He received his PhD degree from South China University of Technology, China, in 2003. His research interests include modern machining theory, technology and machined surface quality control; and advanced manufacturing technologies of functional surface structure.
LU Longsheng, born in 1982, is currently an associate professor at South China University of Technology, China. He received his PhD degree from South China University of Technology, China, in 2009.His research interests include heat management of microelectronic/optoelectronic chip and carbon fiber processing.
TANG Yong, born in 1962, is currently a professor and a PhD candidate supervisor at South China University of Technology, China. His main research interests are microelectronics manufacturing and its digital design.
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Tang, T., Wan, Z., Lu, L. et al. Characteristics and formation mechanism for stainless steel fiber with periodic micro-fins. Chin. J. Mech. Eng. 29, 564–570 (2016). https://doi.org/10.3901/CJME.2016.0329.041
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DOI: https://doi.org/10.3901/CJME.2016.0329.041