PREDICTION OF THE CUTTING FORCE IN END MILLING OF DIFFICULT-TO-MACHINE MATERIAL POCKETS

In the end milling of the pockets,the radial depth and real feed vary as the end mill moves along the corner.This will result in the unstable of the cutting force and the bad accuracy of the milled pockets,even cause the collision or damage of the cut.A mathematical model which describe the geometric relationship between an end mill and the corner profile is established the predicted cutting forces can be calculated in terms of cutting parameters,workpiece material properties and the relative position of the tool to workpiece.In the end,the experiment proves the variation of cutting forces.