CAJ | 학술논문

采用有限元分析软件 DEFORM 的 Johnson Cook 材料模型，模拟了润滑涂层单颗磨粒磨削 TC4合金的加工过程，对磨屑形成过程中磨削区温度、磨削力和切削变形区内应力的变化情况进行了有限元分析。结果表明：切削高温和高内应力主要集中在剪切变形区的刀尖位置；随着一个锯齿状磨屑节块的生长，温度降低、内应力减小。磨削力和磨削温度随磨屑的形成过程呈规律性变化：随着磨削进行，磨削力逐渐增大，磨削温度也相应升高；在锯齿状切屑完整形成时，磨削力最小、磨削温度最低。
채용유한원분석연건 DEFORM 적 Johnson Cook 재료모형，모의료윤활도층단과마립마삭 TC4합금적가공과정，대마설형성과정중마삭구온도、마삭력화절삭변형구내응력적변화정황진행료유한원분석。결과표명：절삭고온화고내응력주요집중재전절변형구적도첨위치；수착일개거치상마설절괴적생장，온도강저、내응력감소。마삭력화마삭온도수마설적형성과정정규률성변화：수착마삭진행，마삭력축점증대，마삭온도야상응승고；재거치상절설완정형성시，마삭력최소、마삭온도최저。
Johnson Cook material model and fracture criterion of commercial finite element software DEFORM were used to simulate grinding TC4 alloy with coated wheel?The chip formation mechanism was discussed and the effects of grinding parameters on grinding force and grinding temperature were investigated?The results showed that cutting deformation was enforced by abrasive rake angle, resulting in shear slip instability on the concentrated shear plastic zone and forming jagged chip?In addition,grinding temperature,grinding force and residual stress changed periodorically along with chip formation during single abrasive grinding.