Modeling of Tool-Chip Contact Length for Orthogonal Cutting of Ti-6Al-4V Alloy Considering Segmented Chip Formation
Modeling of Tool-Chip Contact Length for Orthogonal Cutting of Ti-6Al-4V Alloy Considering Segmented Chip Formation
复制标题
考虑分段切屑形成的 Ti-6Al-4V 合金正交切削刀具-切屑接触长度建模
DOI：
10.1007/s12209-016-2806-8
复制
发表时间：
2016
影响因子：
7.1
通讯作者：
Wu Jing
中科院分区：
文献类型：
--
作者：
Ren Chengzu;Ke Zhihong;Chen Guang;Wu Jing
在不同的切削速度（10 ~ 160 m/min）和进给速度（20 ~ 160 μm/rev）下，对Ti-6Al-4V合金进行了正交切削实验。通过刀具前刀面轨迹测量刀屑接触长度；同时，用切屑的分割程度和切屑压缩比来表征切屑局部变形和整体变形引起的切屑形态。根据分割后的芯片形态对这些参数进行了分析和计算。此外，提出了考虑切屑整体变形和绝热剪切带局部变形的三种修正模型，并采用遗传算法优化计算了模型的常数。考虑切屑整体变形和局部变形，三种模型预测的刀具接触长度值和变化趋势与实验结果吻合较好。
In this work, the orthogonal cutting experiments on Ti-6Al-4V alloy were conducted at different cutting speeds(10—160 m/min)and feed rates(20—160 μm/rev). The tool-chip contact length was measured by the track of tool rake face; meanwhile, the chip morphology caused by the localized and overall chip deformation was characterized by the degree of segmentation and the chip compression ratio, respectively. These parameters were analyzed and calculated according to the segmented chip morphology. In addition, three modified models considering the overall chip deformation and the localized deformation of adiabatic shear band were proposed, and the constants of the models were calculated by the genetic algorithm optimization. Considering the overall and localized chip deformation, the value and variation trend of the tool-contact length predicted by these three models agreed well with the experimental results.