摘要
以精密螺母磨床用直线电机驱动型工作台为研究对象,考虑滚动导轨摩擦和直线电机等热源对工作台上台面的影响,应用ANSYS有限元分析软件对上台面进行了热-力耦合分析。结果表明:机床磨削过程中,上台面达到稳态时的温升为3℃左右,最大变形值为35.2μm,中间部位为其结构设计的薄弱环节;与静力分析比较,两者的最大变形值虽相差不大,但热分析时的整体变形量和等效应力值均大于静力分析结果,等效应力最大值增加了128%。研究结果为同类型结构的热态特性分析提供了参考。
Taking the nut grinder worktable driven by linear motor as the researching object, considering the effect of the hot source including rolling guide friction and linear motor to the table up-surface, ANSYS finite element analysis software was used to do thermal-mechanical coupling analysis. The results show that the temperature rise in steady state of the table up-surface is 3 ℃ and the maximum deflection is 35. 2 μm during grinding process. The weaknesses in the structure is its intermediate part. Compared with static analysis, the whole deformation and equivalent stress value in thermal analysis are all outweigh the results of static analysis. The maxi- mum equivalent stress increases by 128%. The results provide reference for thermal characteristics analysis with same type structure.
出处
《机床与液压》
北大核心
2013年第17期16-20,共5页
Machine Tool & Hydraulics
基金
国家科技重大专项(2011ZX04003-021-02)
关键词
直线电机
工作台
温度场
热变形
ANSYS
Linear motor
Worktable
Temperature field
Thermal deformation
ANSYS
