机电工程技术2025，Vol.54Issue(21)：35-42,76,9.DOI:10.3969/j.issn.1009-9492.2025.00008
超精密磨床新型复合材料研制及床身热结构耦合仿真分析
Development and Thermal Structure Coupling Simulation Analysis of New Composite Materials for Ultra Precision Grinding Machine Bed
摘要
Abstract
In view of the problems of uneven temperature distribution,wide temperature fluctuation range,large thermal stress and thermal deformation,and difficulty in achieving thermal balance of the traditional grinder bed made of cast iron materials,using steel polypropylene fiber reinforced artificial granite(SPFRAG)material instead of cast iron is proposed to improve the thermal stability of the grinder bed.The ratio and preparation process of each component material of SPFRAG are researched and designed,SPFRAG new material molding specimens with better comprehensive performance is developed,and the static mechanical strength and thermal performance parameters of the material are tested,property parameters with cast iron materials are comparative analyzed.Taking a certain model of cast iron material grinding machine bed as the design prototype,a new configuration of SPFRAG new material ultra precision grinding machine bed is optimized.SolidWorks and ANSYS Workbench simulation are utilized to analyze the multiple heat sources that affect the deformation of SPFRAG new material grinding machine bed under working conditions,determine the bed boundary conditions,and conduct finite element thermal steady-state and transient thermal stress analysis on the SPFRAG new material grinding machine bed,and study the effect of temperature at different positions on the thermal deformation of SPFRAG new material grinding machine bed,and compare and analyze the thermal performance results of the material grinding machine bed.The results show that the surface of the new material grinder bed of SPFRAG has smaller temperature gradient distribution,smaller temperature fluctuation range and shorter time to reach thermal equilibrium.The guide rail surface and motor installation surface are the areas with the highest temperature rise,while the temperature changes in other areas are not significant.Under simulation experimental conditions,The transient thermal stress and thermal deformation of the bed of SPFRAG new material grinder caused by uneven temperature distribution and temperature gradient are small.The natural frequencies of the grinding machine bed in the first few steps have significantly increased under thermal environment.The decrease in thermal expansion coefficient can further reduce the thermal deformation of the grinding machine bed,among them,compared with the original cast iron grinding machine bed,the optimized SPFRAG new material grinding machine bed has a 12.56%reduction in thermal deformation and a 67.88%reduction in thermal stress,and the first three natural frequencies of the grinding machine bed are increased by 27.72%,53.48%and 33.76%,respectively.The above research conclusions fully demonstrate the feasibility and superiority of SPFRAG new material in improving the thermal performance and thermal stability of grinding machine bed.Finally,corresponding solutions are proposed to reduce the thermal deformation of the grinding machine bed and improve the production reliability of the machine tool,which can provide a basis for improving the machining accuracy of the machine tool.关键词
SPFRAG新型材料/超精密磨床/性能参数测试/热膨胀系数/热稳态分析/瞬态热应力/热结构耦合/热稳定性Key words
SPFRAG new material/ultra precision grinding machine/performance parametertesting/coefficient of thermal expansion/thermal steady-state analysis/transient thermal stress/thermal structural coupling/thermal stability分类
金属材料引用本文复制引用
龚闪闪,李放,乔雪涛,许华威,张宇翔,赵乙衡..超精密磨床新型复合材料研制及床身热结构耦合仿真分析[J].机电工程技术,2025,54(21):35-42,76,9.基金项目
河南省科技攻关项目(202102210276,212102210318) （202102210276,212102210318）
新一轮河南省重点学科(机械)·教研项目([2023]414号) （机械）
