共查询到3条相似文献,搜索用时 0 毫秒
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Ik Soo Kang Jeong Suk Kim Yong Wie Seo 《Journal of Mechanical Science and Technology》2008,22(2):293-299
The analysis of the cutting force in micro end milling plays an important role in characterizing the cutting process, as the
tool wear and surface texture depend on the cutting forces. Because the depth of cut is larger than the tool edge radius in
conventional cutting, the effect of the tool edge radius can be ignored. However, in micro cutting, this radius has an influence
on the cutting mechanism. In this study, an analytical cutting force model for micro end milling is proposed for predicting
the cutting forces. The cutting force model, which considers the edge radius of the micro end mill, is simulated. The validity
is investigated through the newly developed tool dynamometer for the micro end milling process. The predicted cutting forces
were consistent with the experimental results. 相似文献
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This paper aims at developing a statistical model to envisage vibration amplitude in terms of geometrical parameters such as radial rake angle, nose radius of cutting tool and machining parameters such as cutting speed, cutting feed and axial depth of cut. Experiments were conducted through response surface methodology experimental design. The material chosen is Aluminum (Al 7075-T6) and the tool used was high speed steel end mill cutter with different tool geometry. Two channels piezoelectric accelerometers were used to measure the vibration amplitude. The second order mathematical model in terms of machining parameters was built up to predict the vibration amplitude and ANOVA was used to verify the competency of the model. Further investigation on the direct and interactive effect of the process parameter with vibration amplitude was carried out for the selection of process parameter so that the vibration amplitude was maintained at the minimum which ensures the stability of end milling process. The optimum values obtained from end milling process are Radial rake angle-12°, Nose radius-0.8 mm, Cutting speed-115 m/min, Cutting feed rate-0.04 mm/tooth, axial depth of cut-2.5 mm. The vibration amplitude exhibited negative relationship with radial rake angle and nose radius. The dominant factors on the vibration amplitude are feed rate and depth of cut. Thus it is envisaged that the predictive models in this study could produce values of the vibration amplitude close to the experimental readings with a 95% confidence interval. 相似文献