Influence of the structure of blanked materials upon the blanking quality of copper alloys

Metrology of the burr amount - correlation with blanking operation parameters (blanked material – wear of the punch)

“…This is confirmed also in [3] and [4]. With regards to the properties of blanking materials, Gréban in [5] says that the composition of cutting alloys has a strong influence on the quantity of burrs that is created during the blanking operation. However, the works are more on the theoretical study of the conditions of burr appearance, than on an experimental metrology on the burr amount.…”

“…10) can show several very interesting phenomena. Indeed, a quick initial analysis of the curve allows noting that the kinetics of appearance of burr, as it was highlighted by Gréban [5], depends directly on the blanking material. Because of the non-homogeneity of the burrs on the blanked contour, the method seems the most appropriate, because it is obtained from a large number of profiles, which has the advantage of allowing a complete scan of the blanking edge.…”

The tool surface wear during the silicon steel sheets blanking process

“…Production of the sheared blank elements, with a certain quality, requires an optimal process parameters selection [4,6,11,30]. Gréban et al in their work [6] presented the effects of copper alloy elements blanking process.…”

“…Gréban et al in their work [6] presented the effects of copper alloy elements blanking process. Tekiner et al [30] described the result of experimental analysis of the aluminum alloy element blanking process.…”

Prediction of abrasive punch wear in copper alloy thin sheet blanking

“…The manufacturing industries of leadframes have followed the trend in downscaling of electronic components, and thus they have produced smaller parts with high controlled geometry. Gréban et al [1] have analysed the influence of blanked materials microstructure on leadframes quality with copper alloy thin sheets, a material chosen for its electrical properties. The authors have found that the mechanical characteristics and microstructure of copper alloys have a strong influence on parts blanking profile.…”