摘要
为了预测超细晶陶瓷刀具的寿命,在建立Archard磨损模型和切削有限元模型、摩擦模型的基础上,进行了宏观尺度的模拟仿真和试验。主切削力、刀屑间压力随进给量增大而增大,刀屑之间温度、滑动速度随进给量增大先增大再降低。切削深度对刀屑之间的滑动速度和压力影响较小,但对刀/屑间的温度和主切削力影响较大。根据宏观尺度的超细晶陶瓷切削过程数值模拟的数据结果分析和统计、多元线性拟合、泰勒寿命公式得到超细晶陶瓷刀具的寿命预测模型,进行了超细晶陶瓷刀具切削实验验证,该模型的建立为超细晶陶瓷刀具的实际应用打下理论基础。
In order to predict the life of ultra-fine grained( UFG) ceramic tool macroscale simulations and experiments had been done based on archard wear model and finite element model and friction model. Primary turning forces and the pressures between the tool and chip increase with increasing of feed rates. Temperatures and sliding velocities between the tool and chip increase with feed rates firstly and then reduce. Effects of cutting depths on sliding velocities and pressures between tools and chips are smaller. But cut depths on the tool /chip have larger influences on temperatures and primary turning forces between the tool and chips. According to macro scale data analysis and statistics and multiple linear regressions and turning experiments,tool life prediction model of ultrafine ceramic tool has been obtained. The research results would lay the theoretical foundation for the practical application of ultrafine ceramic turning tools.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第10期204-209,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(50975302)
重庆市自然科学基金计划一般项目(cstc2014jcyjA50004)
