摘要
在分析锯齿形切屑形成的基础上,将切屑单个锯齿视为梯形,建立梯形各顶点的应变和应变率计算解析模型。进行高速切削GH4169实验,并收集实验获得的切屑。运用解析模型,分析不同切削速度下,高温合金GH4169切屑的变形情况。实验结果表明:在切削速度200~1 000 m/min范围内,随着切削速度的增加,GH4169切屑变形程度增大,应变和应变率最大可分别达到4.91和4.59×106s-1。
An analytical model of vertex's shear strain and shear strain rate was developed based on the process of serrated chip formation with geometry shape of serrated chip as a trapezoid.The chip deformations under different cutting speeds for GH4169 were discussed with the proposed model.The results showed that with the cutting speed increasing,the degree of chip deformation increased.The maximums of strain and strain rate were respectively 4.91 and 4.59×106 s-1 with applied cutting speed range in 200~1 000 m/min.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2011年第2期225-228,共4页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家重点基础研究发展计划(973计划)资助项目(2009CB724401)
国家自然科学基金资助项目(50828501)
国家科技重大专项资助项目(2009ZX04014-043)
"十一五"国家科技支撑计划资助项目(2008BAF32B01)
山东省自然科学杰出青年基金资助项目(2009JQB01027)
关键词
高速切削
锯齿形切屑
高温合金
切屑变形
应变
High speed cutting
Serrated chip
Superalloy
Chip deformation
Strain