摘要
切削加工过程中,机床会由于受不同热源影响而发生热变形,产生机床误差即热误差。在各种类型的机床误差中,热误差可占机床总误差的40%-70%,是影响机床加工精度的主要因素。为减小不同热源对机床热误差的影响,提高机床加工精度,目前主要有3种方法：1）通过对机床零部件进行优化设计,提高机床热刚度;2）应用更为有效的隔离措施,尽量减小或隔离热源影响;3）热误差补偿,通过对热误差进行在线预测及实时补偿,减小机床热变形。热误差建模是实时补偿热误差的前提和基础。首先对机床热误差建模技术进行了介绍,并对热误差建模技术领域的国内外研究现状进行分析,总结了目前热误差建模领域存在的主要问题,进而对热误差建模技术的未来发展方向进行了展望。
During cutting,machine tools are influenced by different heat sources,which induces machine thermal deformation,deviation and thermal error.In different machine errors,thermal error accounts for 40%--70% of total machine errors,which is the main influence factor of machining accuracy.In order to reduce machine thermal error and improve machining precision,there are mainly 3ways at present：1）Improving machine thermal stiffness by optimal design of machine structure;2）Separating heat sources from machine tools;3）Thermal error compensation,which reduces the influence of thermal distortions by predicting and compensating measures.In order to compensate thermal errors,thermal error modeling is the premise and foundation.Therefore,thermal error modeling technology is introduced in this paper firstly,and its recent development both at home and abroad is analyzed.The main obstacles in thermal error modeling field at present are summerized,and the future of the technology are presented.
出处
《河北科技大学学报》
CAS
2015年第4期344-350,共7页
Journal of Hebei University of Science and Technology
基金
国家自然科学基金(51305244)
山东省自然科学基金(ZR2013EEL015)
山东省高等学校科技计划项目(J11LD24)
关键词
数字控制机床
切削加工
热误差建模
研究进展
建模技术
CNC machine tools
machining
thermal error modeling
research progress
modeling technology
