ABSTRACT

In the turning process, surface quality and tool life significantly depend on the surface texture design, tool geometry, process parameters, and cooling environment. Further, cutting velocity (v) and feed rate (f) have a proportional relationship with productivity. In the past, few attempts were made in turning of AISI 304 under cryogenic, dry, and combination of cryo-MQL conditions with conventional (without texture) tools. In the present research work, different microgroove angles 90° (T-1), 45° (T-2), and 60° (T-3) to the main cutting edge of the tool was prepared on the rake face of the PVD coated tungsten carbide tools, and performed experiments on AISI 304 SS under MQL cooling technique at varying ‘v’ and ‘f’ conditions, respectively. Further, experimental results were compared with untextured tools under MQL and wet cooling, respectively. From the results, the T-1 tool with MQL significantly reduced the surface roughness (R_a), tool wear (V_b), and cutting zone temperature (T_t) when compared to the T-2 tool with MQL, T-3 with MQL, untextured tool with MQL, and untextured tool with wet cooling, respectively, at varying ‘v’ and ‘f’ conditions.

摘要

在车削过程中，表面质量和刀具寿命在很大程度上取决于表面纹理设计，刀具几何形状，工艺参数和冷却环境。此外，切削速度（v）和进给速度（f）与生产率成比例关系。过去，很少有人尝试在低温，干燥以及低温MQL条件与常规（无纹理）工具的组合下翻转AISI 304。在本研究工作中，在PVD的前刀面上准备了与刀具主切削刃成90°（T-1），45°（T-2）和60°（T-3）的不同微槽角。涂层碳化钨工具，并在MQL冷却技术下以' v'和' f在AISI 304 SS上进行了实验条件分别。此外，将实验结果分别与无纹理工具在MQL和湿冷下进行了比较。从结果可以看出，与带有MQL的T-2刀具相比，带有MQL的T-1刀具可以显着降低表面粗糙度（R _a），刀具磨损（V _b）和切削区温度（T _t）。在变化的“ v”和“ f ”条件下，分别使用MQL，使用MQL的无纹理工具和使用湿式冷却的无纹理工具。