Predicting breaking with groove type breakers

Machinability aspects of heat-treated Al-(6-11)%Si cast alloys :

“…There is, thus, a clear need for the parameters of chip size and shape to be studied in detail by the industry as a formal research topic in order to identify the conditions which will ultimately promote better chip evacuation. 158 A punctual examination of the chips being produced upon machining a particular workpiece will provide a considerable amount of information as to how well the job is proceeding, how tool wear is progressing, and why premature tool failure has occurred, or in other words, why a shortened tool life intervenes. 159 Chip-formation and the chip-breaking mechanism has been the subject of studies for the level of understanding has been adequate, the results from previous studies were based on simple cutting tools having the same tool geometry and cutting parameters along the cutting edge.…”

A Study on Chip Breaking Limits in Machining

“…The latter has little influence on chip breaking. (14) (e) The critical feed-rate fa is related to the coefficient K R which is related to the radius of curvature of the chip before breaking. Based on experimental observations, a conservative estimate of K R would be:…”

“…Therefore, it is necessary to study and predict the chip breaking limits under different conditions. Previous work on chip formation and breaking include studies on chip flow [1-3], chip curling [4][5][6], chip type analysis [7,8], chip breaking [9][10]7], and chip-breaking grooves [11][12][13][14]. A comprehensive study on modeling and prediction of chip-breaking limits is still lacking.…”

Effect [sic] des paramètres métallurgiques sur le comportement d'usinage des alliages 356 et 319 (étude de forage et de taraudage) /

“…This impact produces a bending moment in the chip and causes fracture. 105 Kruzhanov and Zeitz 106 investigated the mechanism of chip formation during high speed drilling of steel, titanium and aluminum alloys. They observed that a transition from continuous ribbon to a segmented chip could take place when drilling in aluminum alloy, which has greater thermal conductivity than the titanium alloy.…”