摘要
基于多线性弹塑性材料本构模型和Shear Damage损伤准则,建立椴木单颗粒砂带磨削的有限元仿真模型;通过有限元模型,研究了单磨粒切削的成屑机理、切削力以及切削深度和弹性支撑对切削力的影响。结果表明:从成屑机理角度,可将单颗磨粒切削过程分为滑擦、耕犁和切削3个过程。在稳定切削阶段,切削深度对切削力的影响较大,随着切削深度的增加,平均切向切削力及其标准差均增大,但其变异系数略微减小。理想条件下,弹性支撑切向切削力的标准差比刚性支撑大44.74%,考虑外界扰动后弹性支撑切向切削力的标准差比刚性支撑小8.54%。
Based on the multi-linear elastic-plastic constitutive model and Shear Damage criterion,the finite element simulation model of single abrasive belt grinding of Chloroxylon swietenia was established.Through the finite element model,the chip forming mechanism mechanism and cutting force of single abrasive grinding,and the influences of cutting depth and elastic support on the cutting force were studied.The results showed that the single abrasive grinding process could be divided into three stages from the aspect of chip forming mechanism:slipping,ploughing and cutting.In the stable cutting stage,the cutting depth had a greater influence on the cutting force.With the increase of cutting depth,the average tangential cutting force and its standard deviation all increased,but its coefficient of variation decreased slightly.Under ideal conditions,the standard deviation of tangential cutting force of the elastic support was 44.74%larger than that of the rigid support.However,it was 8.54%less than the rigid support under the external disturbance.
作者
蔡晨
伍希志
吴雨阳
李贤军
马恒禛
CAI Chen;WU Xi-zhi;WU Yu-yang(College of Materials Science and Engineering,Central South University of Forestry&Technology,Changsha,Hunan 410082;Guangzhou Tech-long Packaging Machinery Co.,Ltd.,Guangzhou,Guangdong 510000)
出处
《安徽农业科学》
CAS
2022年第1期213-216,243,共5页
Journal of Anhui Agricultural Sciences
基金
长沙市重点研发计划项目(Kq2004094)
国家大学生创新创业训练计划项目(S202010538015)
广州达意隆包装机械股份有限公司博士后科研工作站项目(263805)。
