摘要
三坐标测量仪是精密测量设备,机体结构的受力、控制系统及环境温度变化、振动等因素对测量精度都会产生较大的影响。针对受载荷及温差等因素的影响,三坐标测量仪的机体会产生变形,从而导致测量误差的现象,对载荷和温差的影响分别进行了详细分析。在设计过程中建立三坐标测量仪整机CAD及有限元模型,通过模型的受力变形、模态分析,找出机体变形的最大点及薄弱环节;通过热-结构耦合,分析在环境温度变化时机体结构的最大变形位置;在对运算分析所得的数据进行研究基础上,进行整机机体的设计完善和优化,从而控制和降低载荷及温差对三坐标测量仪测量精度的影响,为三坐标测量仪的优化设计提供科学有效的方法和必要的理论依据。
Three coordinate measuring machine is a precision measuring equipment,the measurement accuracy of CMM will have a great impact because of the force of body structure,control system and changing of environment temperature,vibration and other factors.According to the influence of load and temperature difference and other factors,the body of CMM will produce deformation,and it will lead to produce measurement error,so the influence of load and temperature difference are analyzed in detail.The CAD and finite element model of CMM are established during the design process,the maximum body deformation point and weak link of CMM are founded with force deformation and modal analysis; the maximum deformation position of body structure is analyzed by the thermal-structure coupling analysis with temperature changing the machine body design is improved and optimized based on studying of calculation and analysis data,and the influence of load and temperature difference on measurement accuracy of CMM is controlled and reduced,and the scientific and effective methods and necessary theoretical basis are provided for optimal design of CMM.
出处
《机械设计与制造》
北大核心
2013年第11期88-91,共4页
Machinery Design & Manufacture
基金
2012年江苏省淮安市科技创新基金项目支持(HAP201280)
