Effect of Different Cutting Speed and Feed Rate on Surface Roughness in Femur Bone Drilling
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© 2015 The Authors In drilling of bones, surface roughness can be used as an indication of bone cell damage induced by the machining process. In common workpieces, relationship between both feed rate and cutting speed on surface roughness to the workpiece is apparent. It is expected that such relation also exists when bone is the workpiece. On the other hand, there are various quantifications or parameters of surface roughness. So, it needs to be confirmed which parameter that can suit the surface roughness on bone machining results. This study intends to evaluate the effect of cutting speed and feed rate on surface roughness of drilled bone, as well as to identify which surface roughness parameter fits for such machined surface. A series of experimental bone drilling was done by using two input variables (i.e., cutting speed and feed rate). The cutting speeds are 6 m/min and 37 m/min and the feed rates are 0.01 mm/rev and 0.2 mm/rev. For each machined surface, surface roughness was taken in five parameters (i.e., Ra, Rq, Rk, Rpk, and Rvk). The results show that feed rate significantly affects the surface roughness while cutting speed does not. Although further detail needs to be observed, it is confirmed that Ra parameter can be used in the measurement of surface roughness of bone machining results.
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