MODELING OF THE CUTTING FORCES IN END MILLING OF A METALLIC MULTILAYER MATERIAL

Multilayer metal materials are increasingly used by tool shops in the production of transfer tools for sheet-metal forming. In research, it is found that during the machining of these advanced materials, damage to the cutting edge often occurs due to jumps in the cutting forces. The size of the cutting forces when milling a multi-directionally layered metal material is influenced by both the direction of depositing the individual layer and the geometry of the cutting tool. The main goal of the research was to create a mechanistic model of cutting forces for the end-milling of unidirectional and multidirectional 20MnCr5/316L four-layered metal material. The results of the model were compared with experimental data, where a good agreement was found when milling unidirectional layered material and a slightly worse agreement when milling multidirectional material. The maximum observed deviation of the predicted cutting forces is 14.6 % for all the comparative tests.