科技通报
科技通報
과기통보
Bulletin of Science and Technology
2015年
11期
233-238
,共6页
车削毛刺%有限元模型%机-热耦合%刀具磨损
車削毛刺%有限元模型%機-熱耦閤%刀具磨損
차삭모자%유한원모형%궤-열우합%도구마손
turning burr%finite element model%mechanical-thermal coupling%tool wear
精密车削中形成的毛刺极大地影响着工件精度、提高了制造成本。基于Deform 3D建立了机-热耦合车削毛刺形成模型，根据车削毛刺形成过程中工件材料的塑性变形与流动特征，将毛刺的形成分为三个具有不同特征的阶段，并进行了机理分析。模拟了切削参数对毛刺形成的影响，模拟结果与车削实验结果比较接近。指出了切削力的改变是影响毛刺形成的根本原因。同时建立了刀具磨损比较分析模型，为基于毛刺优化控制的切削性能综合分析提供了一条有效的途径。
精密車削中形成的毛刺極大地影響著工件精度、提高瞭製造成本。基于Deform 3D建立瞭機-熱耦閤車削毛刺形成模型，根據車削毛刺形成過程中工件材料的塑性變形與流動特徵，將毛刺的形成分為三箇具有不同特徵的階段，併進行瞭機理分析。模擬瞭切削參數對毛刺形成的影響，模擬結果與車削實驗結果比較接近。指齣瞭切削力的改變是影響毛刺形成的根本原因。同時建立瞭刀具磨損比較分析模型，為基于毛刺優化控製的切削性能綜閤分析提供瞭一條有效的途徑。
정밀차삭중형성적모자겁대지영향착공건정도、제고료제조성본。기우Deform 3D건립료궤-열우합차삭모자형성모형，근거차삭모자형성과정중공건재료적소성변형여류동특정，장모자적형성분위삼개구유불동특정적계단，병진행료궤리분석。모의료절삭삼수대모자형성적영향，모의결과여차삭실험결과비교접근。지출료절삭력적개변시영향모자형성적근본원인。동시건립료도구마손비교분석모형，위기우모자우화공제적절삭성능종합분석제공료일조유효적도경。
Burrs that formed on the edges of workpiece in precision turning affect the accuracy of the parts Seriously, and increase the cost of manufacturing. A Mechanical-thermal coupling model for turning burr formation is established based on Deform 3D. The process of turning burr formation is simulated. The characteristics of plastic deformation and stress flow inside workpiece is Analyzed. According to simulation results, three different stages which have different deformation characteristics in burr formation process is proposed and analyzed. The effect of cutting parameters on burrs formation is simulated, It is found that the results of simulation are in agreement with the experimental. The effect of cutting force on burrs formation process is analyzed. Also, a comparison model of tool wear is established in this model. Chip flow, tool wear can be compared under different cutting conditions, these provide an effective way for the analysis of cutting performance based on optimal control of turning burr.
