The Effect of Machining Parameters on Surface Roughness of Alder Wood
Keywords:
Milling rate, Feeding rate, Profilometer, Surface qualityAbstract
In order to build up a bridge between quality and productivity, the present research focus on optimization of CNC end milling process parameters to provide good surface finish as well as high material removal rate. Hence, after converting the lumbers and air drying at sheltered condition, specimens with dimension of 15×10×2.5 cm were randomly obtained from alder and prepared for CNC milling for evaluation of surface quality of the specimens after different milling condition, milling rate (8.37 and 15.07 m/s), feeding rate (6 and 12 m/min), depth of milling (1 and 5 mm), milling pattern (radial and tangential) and milling method (Up-milling and down-milling) were selected as variables. Edge roughness of the milled specimens was measured using Stylus profilometer following ISO 13565 standard. Evaluation surface quality was carried out employing Abot group (Rk, Rpk and Rvk). The influences of the parameters were analyzed as fractional factorial at completely randomized block design at 95 confidence level. The result showed that milling rate, milling pattern and feeding rate have significant influence on surface quality. In conclusion, for achieving an optimum surface quality when milling alder wood, milling speed of 150.07 m/s, feeding rate of 6 m/min, milling pattern of parallel, milling depth of 1 mm and milling on tangential section is recommended.
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