In this study, the effect of tool geometry on the cutting forces, surface roughness, and burr formation in the micro-milling process is investigated. Three different geometric parameters (helix angle, number of cutting edges, and axial rake angle) that may affect the machining performance are taken into account. Inconel 718 superalloy was used as workpiece material, and the tests were performed under dry cutting conditions. According to the results obtained, the minimum cutting forces were obtained at a helix angle of 45°. The increase in the helix angle causes the forces in the F_z direction to increase. For the new cutting tool, increasing number of cutting edges and axial rake angle has little effect on cutting forces. For the worn tool, the cutting forces are lower in the four-edges cutting tool, and the cutting forces obtained in the negative axial rake angle are also higher. The dominant damage types in the cutting tool are abrasive wear and chipping. Increased cutting distance causes the edge and corner radii of the tool to increase. As a result, cutting forces, surface roughness, and burr formation also increase. Generally, the maximum top-burr width is obtained on the up-milling side for the new cutting tool. Maximum top-burr width occurs on the down-milling side in the worn tools. Increasing helix angle causes burr width to increase. It has been determined that low number of cutting edge and negative rake angle cause smaller burr width.

在这项研究中，研究了刀具几何形状对微铣削过程中切削力，表面粗糙度和毛刺形成的影响。考虑了可能影响加工性能的三个不同的几何参数（螺旋角，刀刃数量和轴向前角）。使用Inconel 718高温合金作为工件材料，并在干切削条件下进行测试。根据获得的结果，在45°螺旋角下获得了最小切削力。螺旋角的增加导致F _z中的力方向增加。对于新的切削工具，增加切削刃的数量和轴向前角对切削力的影响很小。对于磨损的工具，四刃刃切削刀具的切削力较低，并且在负轴向前角时获得的切削力也较高。切削工具中主要的损坏类型是磨料磨损和碎裂。增大的切削距离会导致刀具的边缘和角半径增加。结果，切削力，表面粗糙度和毛刺形成也增加。通常，对于新的切削刀具，在上铣削侧获得最大的毛刺宽度。最大的顶部毛刺宽度出现在磨损刀具的下铣削侧。螺旋角增加会导致毛刺宽度增加。