Showing papers by "Simon S. Park published in 2009"
TL;DR: In this paper, a ploughing force model that takes the effect of elastic recovery into account is developed based on the interference volume between the tool and the workpiece, and the elastic recovery is identified with experimental scratch tests using a conical indenter.
Abstract: This paper investigates the mechanistic modeling of micro-milling forces, with consideration of the effects of ploughing, elastic recovery, run-out, and dynamics. A ploughing force model that takes the effect of elastic recovery into account is developed based on the interference volume between the tool and the workpiece. The elastic recovery is identified with experimental scratch tests using a conical indenter. The dynamics at the tool tip is indirectly identified by performing receptance coupling analysis through the mathematical coupling of the experimental dynamics with the analytical dynamics. The model is validated through micro end milling experiments for a wide range of cutting conditions.
227 citations
TL;DR: In this article, the authors examined factors affecting tool wear and a tool wear monitoring method using various sensors, such as accelerometers, force and acoustic emission sensors in micro-milling.
186 citations
TL;DR: In this paper, the authors examined the mechanistic modeling of shearing and ploughing domain cutting regimes to accurately predict micro milling forces and indirectly identified the tool dynamics by performing receptance coupling analysis.
104 citations
TL;DR: In this paper, the authors used the equivalent volume interface between the tool and the workpiece to determine the process damping parameter, which can cause severe tool wear and breakage, especially in the micro scale.
84 citations
01 Jan 2009
TL;DR: In this article, the cutting forces and surface characteristics of soda-lime glass are examined, and torus end milling is performed to examine the effects of feed rates, and spindle speeds, and to investigate tool wear.
Abstract: Micro mechanical machining, which is mechanical removal of material using miniature tools, is one of the fabrication methods in the micro realm that has recently attracted a great deal of attention. Micro machining has the advantage of being able to machine complex shapes from brittle materials. The most challenging problem in the micro mechanical machining of brittle materials is the fabrication of fracture-free surfaces. To avoid brittle fractures, a thorough investigation is required to find the machining parameters in the ductile cutting regime, which is characterized by plastic deformation of material when the chip thickness is smaller than a critical value. In this study, the cutting forces and surface characteristics of soda-lime glass are examined. Conical scratch tests are performed to identify the critical chip thickness, and the cutting forces in the ductile regime are modeled. In addition, torus end milling of glass is performed to examine the effects of feed rates, and spindle speeds, and to investigate tool wear.Copyright © 2009 by ASME
10 citations