摘要
龙门加工中心丝杠热变形是影响机床加工精度的重要因素。为减小丝杠热变形对机床加工精度的影响,以丝杠的实际工况为基础,建立了丝杠温度场及热-结构耦合分析模型,运用有限元分析法获得了丝杠表面的温度场分布及丝杠重力和进给方向的热变形规律。运用M7500红外摄像仪进行了丝杠温度场实验,验证了一定时间段内温度场分析的准确性,并结合实验对仿真参数进行修正,提高了温度场仿真分析的准确性,为丝杠进给过程中控制系统的热误差补偿和整机润滑散热系统的结构改进提供了理论依据。
The thermal deformation of ball screw system is an important factor that influences the processing precision of machine tools. In order to reduce its impact on the processing precision of machine tools, according to the actual working condition establishes the temperature field and thermal structure coupling analysis modal of ball screw system, and based on it, obtains the temperature field distribution on screw surface and the thermal deformation of screw in gravity and feed direction. The temperature field experiment is carried out by M7500 infrared video camera, the experimental data verified the accuracy of the temperature field analysis within a certain period of time, and the accuracy of the temperature field simulation has been improved greatly by modify the simulation parameters through experiment data, puts forward corresponding suggestions for improvement in lubrication cooling system and provides the basis for thermal compensation control system in screw feeding process.
出处
《组合机床与自动化加工技术》
北大核心
2015年第1期4-8,共5页
Modular Machine Tool & Automatic Manufacturing Technique
基金
人工智能四川省重点实验室(2013RYY03)
四川省教育厅重点项目(14ZA0209)
四川理工学院培育项目(2012PY07)
关键词
龙门加工中心
丝杠
温度场
热变形
温度场实验
gantry type machining center
screw
temperature field
thermal deformation
temperature field experiment
