涂层PCBN刀具切削淬硬模具钢的试验研究  

Research on Cutting Hardened Die Steel by Coated PCBN Tool

作　　者：张鹏[1] 李嫚[1] 董海[1] 薛明明 Zhang Peng;Li Man;Dong Hai;Xue Mingming(School of Mechanical Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China;不详)

机构地区：[1]大连理工大学机械工程学院,辽宁省大连市116024

出　　处：《工具技术》2021年第5期34-38,共5页Tool Engineering

摘　　要：采用涂层PCBN刀具对淬硬模具钢(Cr12MoV)进行切削试验,研究不同切削用量和刀尖圆弧半径对切削力和表面粗糙度的影响规律,并采用极差法评估各因素对切削力和表面粗糙度的影响程度。试验结果和分析表明:采用涂层PCBN刀具切削淬硬模具钢时,切削力和表面粗糙度的部分变化规律有别于传统切削理论。主要原因为:淬硬模具钢硬度高、导热性差,属于难加工材料;试验中选用的TiAlN涂层PCBN刀具有较大的负倒棱(0.12mm×-25°)和刀尖钝圆半径(42μm)。另外,通过极差分析的结果可知,切削深度对切削力的影响最大,刀尖圆弧半径对加工表面粗糙度影响最大。The cutting test of hardened die steel(Cr12 MoV) is carried out with coated PCBN tools. The influence of different cutting parameters and tool tip radius on cutting force and surface roughness is studied, and the range method is adopted to evaluate the influence of various factors on cutting force and roughness.Experimental results and analysis show that the variation law of cutting force and surface roughness is different from traditional cutting theory in the process of coated PCBN tools cutting hardened die steel.The main reason is that hardened die steel is a difficult to machine material as a result of high hardness and poor thermal conductivity.The negative chamfer(0.12 mm×-25°) and the blunt radius of the tool tip(42μm) of the TiAlN coated PCBN tools selected in the experiment are larger than uncoated PCBN tools. In addition, according to the results of range analysis, it can be seen that the biggest impact on cutting force is the amount of back tool, and the biggest influence on the machined surface roughness is the radius of the tool tip arc.

关 键 词：淬硬模具钢 涂层PCBN刀具 切削力 表面粗糙度 极差分析法 

分 类 号：TG115.63[金属学及工艺—物理冶金] TG501[金属学及工艺—金属学]