考虑刀具偏心的微铣削加工表面粗糙度预测模型研究

Research on Prediction Model of Surface Roughness in Micro Milling Process Considering Tool Eccentricity

基于微铣削刀具轨迹建立了考虑刀具偏心、最小切削厚度的塑性材料微铣削底面粗糙度的预测模型,预测结果表明粗糙度表面形貌呈锯齿状,刀具偏心会影响表面粗糙度的形貌周期和高度,并进行微铣削加工实验,对粗糙度预测模型进行了验证。采用回归统计方法,建立了脆性材料微铣削加工表面粗糙度预测模型,对加工表面形貌进行观察,利用响应曲面法得到了各铣削用量对表面粗糙度的影响规律。

Based on the micro-milling tool path, the prediction model of the plastic material bottom roughness after micro-milling considering the tool eccentricity and minimum cutting thickness was established. The prediction results showed that the roughness surface is jagged and the tool eccentricity affects the morphology cycle and height of surface roughness. Micro-milling experiment was conducted to verify the roughness prediction model. The surface roughness prediction model of brittle material after micro-machining was established by regression statistical method. The surface morphology was observed, and the influence rule of milling parameters on surface roughness was obtained by using response surface method.