A Study on the Effects of Milling Strategy on Surface Roughness

Abstract

In this study, DIN 1.2344 hot work steel which was hardened at 51 HRC hardness value was processed byusing high-speed milling technology, and different milling parameters with 6 mm-diameter sphericalendmill and the surface qualities which were obtained as a result of milling were examined. Axial and radialfeed values, feed value per tooth and depth of cut were changed between the range of 0.05 and 0.1 mm andthe rate of cutting was changed between the range of 485 rpm and 4,000 rpm. These millings were carriedout on material in the spherical form of which diameter was 21 mm, and the central angle was 150o. Also,milling directions were processed in different ways as climb milling, conventional milling and bidirectionalmilling in experimental cuttings. Surface roughness was examined in directions with 15o, 45o, 75o, 90o, 105o,135o and 165o central angles on the material which was processed. The best surface quality was achieved inregions with 15o and 45o angles.