CAJ | 학술논문

为了研究和预测高速切削切屑形成过程，使用有限元分析软件ABAQUS建立了高速切削高温合金的有限元模型，采用Johnson-Cook热粘塑性材料本构模型、剪切损伤切屑分离准则以及刀-屑界面粘结-滑移混合摩擦模型，对高速切削高温合金过程中锯齿形切屑的形态及切削力进行了研究。通过模拟与实验的对比分析，验证了有限元模型的准确性。切削参数对切屑形成的影响的研究结果表明，高速切削过程中锯齿形切屑的锯齿化程度、切削力以及绝热剪切带内的等效塑性应变随切削速度、刀具前角以及切削厚度的改变而规律性地变化。
위료연구화예측고속절삭절설형성과정，사용유한원분석연건ABAQUS건립료고속절삭고온합금적유한원모형，채용Johnson-Cook열점소성재료본구모형、전절손상절설분리준칙이급도-설계면점결-활이혼합마찰모형，대고속절삭고온합금과정중거치형절설적형태급절삭력진행료연구。통과모의여실험적대비분석，험증료유한원모형적준학성。절삭삼수대절설형성적영향적연구결과표명，고속절삭과정중거치형절설적거치화정도、절삭력이급절열전절대내적등효소성응변수절삭속도、도구전각이급절삭후도적개변이규률성지변화。
In order to study and predict the formation process of the serrated chip in high-speed cutting ( HSC) , a finite element model of the high-speed cutting of superalloy was constructed by using the finite element analysis soft-ware ABAQUS. By the adoption of the Johnson-Cook thermal visco-plastic constitutive model, the separation criteri-on of the chip damaged in shearing and the sticking-sliding mixed friction model of the tool-chip interface, as well as the morphology of the serrated chip and the cutting force in the high-speed cutting of the superalloy were studied. Through the contrast analysis of the simulation and experiment, the results verify the accuracy of the finite element model. The research results of the effects of the cutting parameters on the chip show that the serrated degree of the chip formed in the high-speed cutting, the cutting force and the equivalent plastic strain inside the adiabatic shear band regularly change with the variation of the cutting speed, rake angle of the cutter and cutting thickness.