雕刻机电主轴冷却水套的优化

Engraving the Optimization of the Electromechanical Spindle Cooling Water Jacket

摘要: 建立了有限元温度场及热变形场模型，对整个雕刻机的边界条件进行分析，通过理论公式对电主轴内部电机与轴承生热率和对流换热系数进行计算，在此基础上，建立110 W制冷量下电主轴仿真模型，使用有限元软件分析电主轴的热态特性，得到水冷电主轴的稳态温度场。通过优化分析对导热套结构进行再设计，使主轴温度场均匀化，降低主轴热变形，对优化后电主轴系统进行热特性分析，与水冷系统下的电主轴对比发现，优化后热电冷却系统下的电主轴温度场更加均匀，有效地降低了主轴热变形，使主轴温度更加均匀。

Abstract: The finite element temperature field and thermal deformation field model are established, the boundary conditions of the whole engraving machine are analyzed, the heat generation rate and convective heat transfer coefficient of the motor and bearing inside the electric spindle are calcu-lated through the theoretical formula, on this basis, the simulation model of the electric spindle under 110 W cooling capacity is established, and the thermal state characteristics of the electric spindle are analyzed by using the finite element software to obtain the steady-state temperature field of the water-cooled electric spindle. Through the optimization analysis, the structure of the heat conduction sleeve is redesigned, the spindle temperature field is uniformized, the thermal de-formation of the spindle is reduced, the thermal characteristics of the optimized electric spindle system are analyzed, and compared with the electric spindle under the water cooling system, it is found that the temperature field of the electric spindle under the optimized thermoelectric cooling system is more uniform, which effectively reduces the thermal deformation of the spindle and makes the spindle temperature more uniform.