摘要
落地镗铣床在加工过程中,它的滑枕在主轴箱内移动,镗杆在滑枕内移动,它们从主轴箱内伸出的距离一般比较大,从而使主轴滑枕系统在加工过程中可能由于刚性不足而产生挠曲变形。刚度误差的存在,直接降低了落地镗铣床的加工精度。根据TH6918型数控落地镗铣床设计和制造的生产实践,在考虑了主轴轴承刚度的基础上,运用ANSYSWORKBENCH建立主轴滑枕系统的有限元模型,分析滑枕端部的变形量,研究滑枕挠曲变形的补偿方法,并运用数学模型和有限元相结合的方法求出滑枕伸出量与拉杆拉力之间的关系,为生产实践中的调试工作提供了理论依据。
When the floor boring and milling machine is in machining process,its ram moves in the headstock while the boring bar moves in the ram.Generally the distance they extend from the headstock is large which will cause flexural deformation due to insufficient stiffness of the spindle ram system.The existence of the stiffness error reduces the machining accuracy directly.According to the design and manufacture production practices of the TH6918 CNC floor boring and milling machine,it,taking the spindle bearings stiffness into account,establishes the finite element model of the spindle ram system and analyzes the deformation of the end of the ram by using ANSYS WORKBENCH.It also studies the ram deflection compensation and finds out the relationship between the ram＇s elongation and rods＇pull by using the method of mathematical models and FEM,which provides a theoretical basis for the commissioning work in the production practices.
出处
《机械设计与制造》
北大核心
2013年第5期201-203,206,共4页
Machinery Design & Manufacture
基金
苏州市技术专项资助项目(BE2011076)
关键词
有限元
滑枕变形
补偿
Finite Element
Ram Deformation
Compensation
