Behavior of the magnetic abrasive tool for cutting edge preparation of cemented carbide end mills

Abstract

Magnetic abrasive processes combine characteristics of grinding and lapping. Due to deformable tool behavior, complex surface shapes and edges can be machined. Therefore, this process is predestined for preparation of drilled cutting tools. High quality finishing results require in depth process expertise. This paper focuses on the behavior of the magnetic abrasive tool taking Magnetfinish Ò kinematics into account. Main characteristics of the magnetic abrasive tool behavior during finishing end mills of 12 mm diameter are reshaping and in-process densification of magnetic abrasive layer. Consequently, flute surface modifications occur only in the cutting edge surrounding area. Furthermore, in-process displacements of magnetic abrasive cause non-uniform cutting edge rounding. SEM images indicate abrasive motion along the cutting edge as the best method to obtain smooth cutting edge surface.

Features of Magneto-Abrasive Machining of Taps

“…Investigation of influence of the MAМ process on the state of microgeometry of details showed that it is appropriate to use at the final stages of production. This method allows the occurrence of combined influence on the state of the surface layer, controllably change its physical and mechanical properties, microgeometry as the working surfaces and the cutting edges of the tool (Baron, 2008;Denkena et al, 2014;Karpuschewski et al, 2009;Maiboroda et al, 2012aMaiboroda et al, ,b, 2017Olt et al, 2018;Payam et al, 2016;Shadab et al, 2017;Tikal, 2009;Wu et al, 2016;Yamaguchi et al, 2014).…”

“…The geometry of working part of the taps, particularly their cutting edges, has a complex space shape. The modes and conditions of MAM of the taps will be significantly different from the machining modes of other cutting tools (Baron, 2008;Denkena et al, 2014;Karpuschewski et al, 2009;Keksin, 2013;Maiboroda et al, 2012Maiboroda et al, , 2017Maksarov and Keksin, 2018). A great influence on the quality indexes of the tools have features of location of the taps in the working zone of the machine, rotation speed, value of magnetic induction, type and fraction of the magneto-abrasive powder.…”

Analysis of the Tribological Conditions in Grinding of Polycrystalline Diamond Based on Single Grain Friction Tests Using the Pin-Disk Principle

“…In comparison to conventional cutting materials, the usage of PCD tools leads to higher chip removal rates and lower tool wear [2]. For some applications, PCD tools have a notable longer tool life than cemented carbide tools [3] or silicon nitride tools [4]. In addition, economical machining of highly abrasive materials is often only possible with PCD tools [5].…”