立式加工中心主轴系统的热特性是影响其加工精度的主要因素之一, 对立式加工中心主轴系统进行热特性相关分析尤为重要。对VMC850E立式加工中心进行研究, 利用API主轴热漂移误差分析仪, 采用先进电容式或电感式传感器以及接触式测温传感器, 分析主轴温升情况与热漂移之间的关系。从实验数据的变化趋势可以得出: 主轴在温升阶段径向和轴向热漂移均增大, 其中Y轴方向热漂移最大, 各个方向的热漂移均有先下降后上升的趋势, 进而在加工过程中对主轴的润滑和冷却便提出了更高的要求。

The thermal characteristics of the spindle system of vertical machining center become one of the main factors affecting its machining accuracy. It is particularly important to analyze the thermal characteristics of the spindle system of the vertical machining centers. VMC850E vertical machining center is researched. The API spindle thermal drift error analyzer, advanced capacitive or inductance sensors and contact temperature sensors are used to analyze the relationship between spindle temperature rise and thermal drift. The experimental results show that the radial and axial thermal drift of the spindle increases at the temperature rising stage, and the Y-axis thermal drift is the largest. The thermal drift in all directions decreases at first and then increases. In the process of processing, the requirements of the lubrication and cooling of the spindle are higher.