摘要
简要介绍了高速加工热装式刀具夹持系统,借助非线性有限元分析技术,对高速旋转状态下热装式加长刀杆与刀具配合的压力、变形与接触应力等力学特性进行了分析,结果表明在高转速下,刀杆与刀具配合的力学特性及夹持状态是初始过盈量与因转速而产生的离心力的共同作用的结果,但因热装式加长刀杆与刀具配合的小直径特性,配合特性与夹持状态主要取决于初始过盈量,可视为非线性接触问题来求解。在此基础上进一步给出了热装式加长刀杆与刀具配合的合理过盈量的控制方法与流程,对热装式刀杆的合理设计和选用具有一定的现实指导意义。
In this paper, the shrink-fit holder grip system applied in high speed milling is introduced briefly firstly, then the mechanical characteristic of the matching of lengthened shrink-fit holder and cutting tool such as contact pressure, contact deformation and contact stress are analyzed on condition that of high rotation speed using nonlinear finite element technology. The results show that the mechanical characteristic and hold state of the matching of lengthened shrink-fit holder and cutting tool is combined action of the initial interference and the centrifugal force. But owing to the affected by the minor diameter characteristic of the matching of lengthened shrink-fit holder and cutting tool, the mechanical characteristic and hold state mostly lie on the initial interference and can be resolved treated as a nonlinear contact problem. Finally, a method to determine the reasonable interference between lengthened shrink-fit holder and cutting tool is given and it has a practical guiding significance for the design and selection of the lengthened shrink-fit holder.
出处
《制造技术与机床》
CSCD
北大核心
2009年第7期52-57,共6页
Manufacturing Technology & Machine Tool
基金
国家自然科学基金(50665001)资助
关键词
高速加工
热装式加长刀杆
有限元分析
过盈配合
High-speed Milling
Lengthened Shrink-fit Holder
Finite Element Analysis
Interference Fit
