Gloss Estimating Method of Finished Surface Machined by Ball Nose End-Milling under Constant Contact Angle with a Five-Axis Controlled Machining Center
In recent years, studies have been conducted about creating metal moulds using a five-axis controlled machining centre with ball end milling. Most of these reports concern the programming of CAM based on geometry. However, there have been few reports related to polish-less finished surface. Furthermore, a specular surface like a mirror and finishing under a constant angle between ball end milling and the work piece have not been investigated. Therefore, this paper deals with the gloss of the machined surface when feed rate and pick-feed rate are changed to maintain constant surface roughness considering tool run-out under the condition that the angle between the tool and work piece in contact are inclined at 15. However, by changing the combination of feed rate and pick-feed rate, various specular changes and direction of disposition of reflected light were obtained. Therefore, we suggest a new method of evaluating the gloss of these finished surfaces. Comparing results by the proposed method with ones by a glossmeter, it is clear that an appropriate ratio of feed rate and pick-feed rate is important for obtaining finished surface. Moreover, it is demonstrated that the proposed method is effective for estimating the gloss of the machined surface.
W.B. Lee, C.F. Cheung and S. To
K. Terada et al., "Gloss Estimating Method of Finished Surface Machined by Ball Nose End-Milling under Constant Contact Angle with a Five-Axis Controlled Machining Center", Key Engineering Materials, Vol. 516, pp. 475-480, 2012