The influence of tool path strategies for 3- and 5-axis milling on the accuracy and roughness of shaped surfaces
Free form or shaped surfaces are found on a large number of modern engineering products. 3- or multi-axis CNC milling is usually used in their production. CAM systems are almost exclusively used in the creation of control programs. The aim of the presented research was to compare the quality of shaped surfaces made by 3- and 5-axis milling using three frequently used strategies. A sample with hemispherical surfaces was designed for the experiment. The surfaces predicted by the CAM system were compared with the surfaces actually produced. The disagreement of the predicted surface deviations with the deviations of the produced surfaces was demonstrated. In the evaluation of surface roughness, the advantage of 5-axis milling was partially demonstrated when one of the strategies achieved lower roughness, at two strategies the roughness was identical to 3-axis milling.