Study on mechanisms of burr formation and edge breakout near the exit of orthogonal cutting

Burrs—Analysis, control and removal

“…It is based on the rollover burr being formed in the cutting direction and the oblique cutting being an accumulation of segmented orthogonal cutting. Chern [31] states -similar to Ko's findings -plastic bending and shearing of the negative deformation plane as the dominant mechanisms in burr formation in orthogonal cutting whereas crack propagation along the plane causes the edge breakout. Furthermore, he observed two modes of breakout formation.…”

Analysis of the effects of process parameters on exit burrs in drilling using a combined simulation and experimental approach

“…Dornfeld (1991, 1996) and Chern and Dornfeld (1996) furthered the development of burr formation models through examining the mechanism of burr formation in orthogonal cutting using SEM micro-machining tests. Chern (2006aChern ( , 2006b has continued these SEM studies on the burr formation mechanism. Several researchers have studied the effects of workpiece structure, miniature hole drilling, intersecting holes and workpiece exit angles (Sugawara and Inagaki, 1982;Stein and Dornfeld, 1997;Kim et al, 1999;Min and Dornfeld, 2003).…”

Experimental and Numerical Study of Edge Defects When Turning 17vol.% SiCp/2009Al Composites

“…Xiang et al [14] explored machined surface defect formation of SiC p /Al composites at nanoscale using molecular dynamics simulation and an ultra-precision turning test, and revealed the brittle-ductile machining mode transition mechanism. Chern [15,16] studied the formation mechanisms of burr and edge breakout in metal cutting, and proposed some burr/breakout formation models for orthogonal cutting. The modelling of 2D and 3D oblique cutting were conducted by Sung-Lim Ko et al [17] and Hashimura et al [18], respectively, and it was found that the burr size and fracture location increased as the inclination angle decreased.…”