基于工艺信息感知的进给系统热特性建模  

Modeling of thermal characteristics of feed system based on process information perception

作　　者：李绪恒 张宏杰[1] 王峥 高卫国[2] 翁凌韬 LI Xuheng;ZHANG Hongjie;WANG Zheng;GAO Weiguo;WENG Lingtao(School of Mechanical Engineering,Tiangong University,Tianjin 300387,CHN;School of Mechanical Engineering,Tianjin University,Tianjin 300354,CHN;Changguang Jizhi Technology Co.,Ltd.,Changchun 130000,CHN)

机构地区：[1]天津工业大学机械工程学院,天津300387 [2]天津大学机械工程学院,天津300354 [3]长光集智光学科技有限公司,吉林长春130000

出　　处：《制造技术与机床》2024年第7期124-130,共7页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金-联合基金重点支持项目(U23B20102);国家重点研发项目(2018YFB1701201);国家自然科学基金-青年基金项目(52205535)。

摘　　要：机床精度对热敏感,进给系统生热会引起机床结构温度场变化,并诱致精度失稳。如何构建进给系统在复杂热工况下的热特性评价模型,对于准确掌握机床热特性,并指导开展热态控制与热稳定性提升控制意义重大。传统生热模型以恒定的参数建立模型,未能反映时变性模型与工艺信息的映射关系,文章提出了考虑多源工艺信息的生热模型构造方法,综合考虑了机床在加工过程中的运行参数、工艺参数、热状态等多源信息变化,深入研究了机床输入功率与进给系统各零部件损耗功率之间的匹配关系,建立了进给系统结构件的瞬时生热功率计算模型。实验结果表明,相比于传统方式建模,基于该模型的温度场预测精度提高了28.15%。The accuracy of machine tools is sensitive to heat,and the heat generated by the feed system causes changes in the temperature field of the machine tool structure,inducing accuracy instability.Constructing a thermal characteristic evaluation model of the feed system under complex thermal conditions is of great significance for accurately grasping the thermal characteristics of machine tools and guiding the development of thermal control and thermal stability improvement.Traditional heat generation models are established with constant parameters and fail to reflect the mapping relationship between time-varying models and process information.This paper proposes a heat generation model construction method considering multi-source process information,comprehensively considering the changes in operating parameters,process parameters,thermal state,and other multi-source information during the working process of the machine tool.The matching relationship between the input power of the machine tool and the power loss of each component of the feed system is deeply studied,and an instantaneous heat generation power calculation model for the structural components of the feed system is established.The experimental results show that compared with traditional modeling methods,the temperature field prediction accuracy based on this model is improved by 28.15%.

关 键 词：进给系统 工艺信息 瞬时生热功率 

分 类 号：TH161.4[机械工程—机械制造及自动化]