镗铣加工中心进给系统热误差检测实验研究

Experimental Study on Thermal Error Measurement of Feeding System of Boring and Milling Machining Center

针对TX1600G镗铣加工中心X轴进给系统,设计实验方案采集进给系统的温度场和热误差数据,得到的数据可用于热误差补偿。首先依照实验方案,测量了丝杠关键位置的温度和丝杠上各测点的定位误差。然后利用误差分离原理,较好的分离出了丝杠的热误差。根据实验结果分析了前后轴承、螺母温度随时间变化的规律以及丝杠上各测点热误差与温度测点位置的关系。在实际测量过程中,综合丝杠定位方式和环境温度的影响,得到了丝杠的温度和热误差数据以及规律,测试效果理想,可为进一步的热误差补偿提供准确的数据支持。

With the feeding system of composite TX1600 G boring and milling machining center as the research object,the thermal error measurement of temperature field and thermal error acquisition scheme of the feeding system w ere designed. And the obtained data can be used for thermal error compensation. Firstly the temperature of the key position of the screw and the positioning error of the measuring points are measured according to the thermal error measurement. The principle of error separation is used,and the thermal error of the screw is separated in a better w ay. According to the experimental results,the relationship betw een the temperature of the front and rear bearings and the temperature of the nut,and the relationship betw een the thermal error and the position of the temperature measurement point of the screw are analyzed. In the case w here the influence of the screw positioning mode and the ambient temperature is taken into account,during the actual measurement,the temperature and thermal error data and regularity of the screw are obtained,and the test result w hich can provide accurate data support for further thermal error compensation is ideal.