摘要
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.
In this work, the orthogonal cutting experiments on Ti-6Al-4V alloy were conducted at different cuttingspeeds（10-160 m/min）and feed rates（20-160 μm/rev）. The tool-chip contact length was measured by the trackof tool rake face; meanwhile, the chip morphology caused by the localized and overall chip deformation was characterizedby the degree of segmentation and the chip compression ratio, respectively. These parameters were analyzedand calculated according to the segmented chip morphology. In addition, three modified models consideringthe overall chip deformation and the localized deformation of adiabatic shear band were proposed, and the constantsof the models were calculated by the genetic algorithm optimization. Considering the overall and localized chipdeformation, the value and variation trend of the tool-contact length predicted by these three models agreed wellwith the experimental results.
基金
Supported by the National Natural Science Foundation of China(No.51205284 and No.51575384)
关键词
天津大学学报
英文版
tool-chip contact length
segmented chip
Ti-6Al-4V alloy
localized shear deformation
