插件机龙门横梁的热态特性分析  

Thermal characteristic analysis of cross beam in gantry machining center of moving beam

作　　者：胡意波 高自成[1] 李立君[1] 邹洋 乔志东 HU Yibo;GAO Zicheng;LI Lijun;ZOU Yang;QIAO Zhidong(School of Mechanical and Electrical Engineering,Central South University of Forestry and Technology,Changsha 410000,CHN)

机构地区：[1]中南林业科技大学机电工程学院,湖南长沙410000

出　　处：《制造技术与机床》2022年第11期116-122,共7页Manufacturing Technology & Machine Tool

基　　金：湖南省重点研发计划项目(2021NK2023)。

摘　　要：针对插件机在工作过程中因受热变形而影响加工精度的问题,以深圳某公司的一种异型插件机的横梁结构为研究对象,基于理论力学、材料力学和热力学等理论,结合相关软件,研究横梁在受外力和温度共同作用下的刚度特性。在稳态热力学分析的基础上进行瞬态分析,通过瞬态分析得到了横梁和滑块随时间变化的温度场和变形量等热态参数,结果表明:横梁温度场达到稳态的时间在1875 s以后;100~250 s左右横梁的温度变化较大;横梁受温度和外力共同作用下的最大总变形为0.354 mm,受温度影响的变形量约占总变形的52.9%;通过计算滑块中心点的位置变化,结合实验结果,为后期的软件补偿误差和横梁的优化设计提供一定参考。Aiming at the problem that the processing accuracy of the plug-in machine is affected by thermal deformation during the work process, the beam structure of a special-shaped plug-in machine of a company in Shenzhen is taken as the research object, based on the theories of theoretical mechanics,material mechanics, thermodynamics, etc., combined with relevant software, the stiffness characteristics of the beam under the joint action of external forces and temperature are studied. Based on the steadystate thermodynamic analysis, transient analysis is carried out, and the temperature field and shape variables of the beam and the slider change with time are obtained through the transient analysis, and the results show that the time when the beam temperature field reaches the steady state is after 1 875 s,and the temperature of the beam varies greatly from 100 s to 250 s. The maximum total deformation of the beam under the combined action of temperature and external force is 0.354 mm, and the shape variable affected by temperature accounts for about 52.9% of the total deformation;By calculating the position change of the center point of the slider and combining the experimental results, it provides a certain reference for the software compensation error and optimization design in the later stage.

关 键 词：插件机 横梁 热力学分析 温度场 变形量 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]