Schnittgeschwindigkeitseinfluss beim Schneiden von Edelstahl

With the introduction of high-speed shear cutting in the field of sheet metal processing get the process parameter “cutting speed” and its for influence on the cutting edge quality has taken on a significant role. Due to the previously small industrial application and the corre-spondingly low experiences with the technology, there was a great need in research into the identification and systematization of optimum tool and process parameters. Especially with stainless steel materials, which have low qualities of cutting surface, strong burr formations and high tool stresses during shearing, the influence of a high cutting speed was considered a promising approach to increase the quality of the cutting result. By varying a number of cutting parameters, significant variables were identified which influence the quality and geometry of the cutting surfaces. From These, phenomenological approaches could be derived, which could be generalized by the application to certain conditions and possibly applied to other steel materials. The influence of cutting speed on the geometric cutting edge characteristics was relatively low in the considered range of sheet thicknesses up to 1.5mm. Yet the influence on the nongeometric cutting edge characteristics (hardening) was as high as expected in the considered range of sheet thicknesses. Due to the systematic study of the deep drawing operation "collar forming" could be the influence of the cutting edge could be illustrated to the following forming operations in general. The reduction of strain hardening in the cutting edge area (by high cutting speed, by sharp cutting edges or by cutting with large gap) resulted in an extension of the process window "collar forming" and achieved a reduced tendency of cracking in the collar edges. Further investigations to shearing at a speed of 10 mm / s with the lubricants "Raziol CLF 125 F" and Raziol AL "were carried out in comparison to cutting without lubricant. In this case no significant differences of the geometric parameters on the cutting surfaces were found