Journal of Vibration and Control ( IF 2.8 ) Pub Date : 2020-11-23 , DOI: 10.1177/1077546320974236 K Venkata Rao 1 , Chappa Ramesh 2
Relative vibration between the cutter and workpiece has an influence on the surface generation and dimensional accuracy. In the present work, prediction models were developed for roundness and surface roughness of hole in terms of amplitude and frequency of tool vibration. The proposed methodology carried out a theoretical investigation on the effect of tool vibration components in X- and Y-directions on the mill cutter end point to estimate hole roundness and surface roughness. Series of helical milling experiments were conducted at different levels of spindle rotational speed, cutter orbital speed, and axial depth of cuts using 10- mm and 8- mm diameter mill cutters on Inconel 718. Predicted values of the roundness and surface roughness of hole were compared with predicted values and verified accuracy of the proposed prediction models. The experimental results indicate a good agreement with the predicted value. At spindle rotational speed of 2000 r/min and cutter orbital speed of 50 r/min, the measured and predicted values of the roundness were found to be almost same as the required roundness. The surface roughness was found to be very less at 50 r/min of cutter orbital speed.
中文翻译:
Inconel 718螺旋铣削中刀具振动的建模及其对孔的圆度和孔表面粗糙度的影响
刀具和工件之间的相对振动会影响表面生成和尺寸精度。在目前的工作中,针对工具的振幅和频率,开发了孔的圆度和表面粗糙度的预测模型。所提出的方法对X和Y中刀具振动分量的影响进行了理论研究铣刀终点的方向,以估计孔的圆度和表面粗糙度。在Inconel 718上使用直径分别为10 mm和8 mm的铣刀,在不同的主轴转速,铣刀轨道速度和轴向切削深度上进行了一系列螺旋铣削实验。预测的孔的圆度和表面粗糙度为与预测值进行比较,并验证所提出预测模型的准确性。实验结果表明与预测值吻合良好。在2000r / min的主轴转速和50r / min的铣刀轨道速度下,测得的圆度和预测值与所需的圆度几乎相同。发现在铣刀轨道速度为50 r / min时,表面粗糙度非常小。