摘要
为了实现对数控车削中心主轴箱刚度准确评价及给主轴箱结构改进方案提供负载下刚度检测依据,深入研究全载荷加载装置的加载原理,提出自动变位全载荷下车削中心主轴箱静刚度检测方法,研制全载荷加载装置,应用自动变位全载荷加载装置对车削中心施加载荷进行主轴箱静刚度检测试验;采用有限元法计算全载荷下车削中心主轴箱的静刚度及刚度分布,分析了主轴箱的刚度分布特点;在试验和有限元分析的基础上改进了主轴箱结构的设计方案,修改主轴箱与床身连接的螺栓结合部,使主轴箱静刚度得以提高;通过将改进前后的试验结果与有限元分析进行对比,验证了试验方法的正确性以及基于螺栓结合部的改进方案的有效性。
In order to evaluate stiffness state of the headstock for CNC turning centers accurately, which can provide the modifying suggestions for improvement structural scheme of the headstock, based on thorough investigation of loading theory of full loading device, static stiffness measurement method acted by auto-displacing full load is proposed, in which the static stiffness of the headstock is detected by the self-developed automatic displacement simulate full load loading device. The stiffness and its distribution of turning center＇s headstock is analyzed with finite element method （FEM）. According to results of the smile stiffness measuring experiment and computing fruits with FEM, the structural schema of the headstock is improved by revising the bolt joint between the headstock and the bed, which enhances the static stiffness of the headstock. By comparing FEM analysis with the experimental results of pre- and post structural improvement, the correctness of the measuring method of static stiffness and the effectiveness of improved structural scheme with bolt joint are verified.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2014年第17期142-148,共7页
Journal of Mechanical Engineering
基金
国家重点基础研究发展计划(973计划
2009CB724406)
国家高技术研究发展计划(863计划
2012AA040701)
国家科技重大专项(2011ZX04016-031)资助项目
关键词
模拟全载荷加载
刚度检测
结构方案改进
螺栓结合部
applying simulation with full load
stiffness measurement： improvement of structural scheme
bolt joint
