基于结构静动态设计方法的数控机床滑座结构改进  

Improvement of NC Slide-rest Based on Static/Dynamic Structural Design Method

作　　者：张学玲[1] 常林枫[1] 唐毅[1] 徐燕申[2] 林汉元[2] 

机构地区：[1]中国人民解放军军事交通学院装运机械系图学与设计教研室,天津300161 [2]天津大学先进陶瓷与加工技术教育部重点实验室,天津300072

出　　处：《组合机床与自动化加工技术》2006年第1期88-91,共4页Modular Machine Tool & Automatic Manufacturing Technique

摘　　要：对单自由度系统,其静刚度与固有频率的平方有正比关系。复杂机械结构的静、动刚度与结构的布局有关,但对其某一低阶固有频率和该方向的静刚度,适用上述结论。故通过提高结构的固有频率,可同时改善结构静、动刚度。有限元分析(FEA)方法应用于结构的静、动态设计中,可大大提高结构设计效率。以一数控机床滑座结构为实例,基于结构静、动刚度的关系和FEA方法,对结构进行了改进,使滑座重量减少一半的同时,提高了其结构的静、动态特性。For system of single freedom-degree, the relationship of its static stiffness and square of natural fiequency is direct ratio. For complex mechanical part （multi-freedom-degree）, its static and dynamic stiffness is related to structure, but the former conclusion is also available when aim at certain low frequency and stiffness in accordant direction. Therefore, both static and dynamic stiffness of structure can be improved by increasing structural natural frequency. The application of Finite Element Analysis （FEA） method in structural static/dynamic design made design efficiency advanced greatly. According to the relationship of static and dynamic stiffness and FEA method, a NC side-rest is ameliorated as an example, and its static/dynamic capability is improved with weight half decreased by comparison.

关 键 词：有限元 静动态特性 刚度 固有频率 

分 类 号：TG659[金属学及工艺—金属切削加工及机床] TH123.4[机械工程—机械设计及理论]