EFFECTS OF CUTTING PARAMETERS ON THE SCALLOP SIZE DURING THE MILLING PROCESSES

The effects of cutting parameters on the scallops generated in machini ng are investigated in this paper. An analytical approach is also prop osed to correlate the radius of the tool cutter and the radius of the machined workpiece for the milling of three-dimensional spherical surf aces on a conventional three-axis CNC machine tool. Experiments cre pe rformed to check the validity of this analytical approach, the experim ental results showing that the roundness of the machined surfaces is b est when the radius of the tool cutter is half the radius of the machi ned workpiece for the milling of both three-dimensional internal and e xternal hemispherical surfaces on a conventional three-axis CNC machin e tool. Furthermore, optimal cutting conditions and processes are sugg ested for reducing the scallop size generated in machining.