DEVELOP MODEL OF CUTTING FORCE WHEN MILLING 3D SURFACES BY BALL-END MILL

Abstract

This paper presented some research results about modeling the cutting
force while milling 3D surfaces by a ball-end mill cutter. During milling of 3D
surfaces by ball-end mill cutter, the contact position of the tool with the
machined surface changes so that the cut section changes making the cutting
force change. This causes the deformation of the tool to change and directly
affect the geometry accuracy as well as the surface roughness of the workpiece. On the basis of calculating the cutting section when milling has established the relationship between cutting force and technological parameters such as cutting depth, feed rate as well as workpiece shape and cutting position of the tool on the workpiece surface. It is possible to calculate the cutting force at each position on the machining surface and predict the size error that will appear on the machining surface. The paper also presented some experimental results conducted when processing the spherical surface to evaluate theoretical calculations and formulating a formula to show the relationship between the above parameters and the cutting force.