머시닝센터에서 볼 엔드밀가공으로 고능률, 고정밀도 제고를 위한 표면가공 조건 = Cutting Condition for Improving Cutting Efficiency and Accuracy by Ball Endmill on a Machining Center

다국어 초록 (Multilingual Abstract)

The curved surface machined by plate end mill causes a excess non-cutting volume, in these cases ball end mill is used for the curved surfaces. This study is aimed to obtain the optimum cutting condition by measuring the surface roughness on the conditions of various cutting speed, table speed, tool diameter, radius of curvature when machining the curved surface using the ball end mill.
After designing curve rates, obtaining NC data by CAD/CAM system through CC-Cartesian method and transferred the data through DNC system, we machined the specimens by the CNC machining center.
The surface roughness of specimens was measured by surface roughness tester and CNC 3D coordinate measuring machine.
The cutting condition were the same as follow, velocity ; 15, 20, 25, 30m/min, feed rate ; 40, 60, 80, 100m/min amd redius of curvature ; 30, 40, 50, 60mm, tool diameters ; Φ8, Φ12, Φ16, Φ20mm.
Analizing the working results, we can acquire the acquire the optimum cutting condition of curved specimen at the cutting velocity of 20∼25m/min and the feed rate of 80mm/min. As the same cutting condition, the best surface roughness was showed at Φ16mm of the tool diameter.
But the tool diameter was smaller than Φ8mm, we could improve for the surface roughness by controlling the cusp.