Experimental Study in Transient Thermal Characteristics of High Speed Motorized Spindle
Thermal deformation is a crucial factor affecting the machining accuracy of high-speed machine tools.To investigate the thermal characteristics of high-speed electric spindles,a real-time detection platform for temperature field and thermal deformation of high-speed machine tools has been established,which includes multiple temperature sensors,multi-channel data recorders,laser displacement sensors,eddy current sensors,high-frequency data acquisition cards,and industrial control computers.The test results indicate that the temperature of the electric spindle stator increases with the increase of rotational speed,and the temperature rise becomes more significant when the speed exceeds 3000 r/min.Most of the heat generated by the electric spindle system is absorbed by the cooling water,resulting in minor temperature rises in the base,water jacket,and outer ring of the bearing.The positional deviation caused by thermal deformation of the spindle increases with the increase of rotational speed,while the runout of the spindle end face decreases with the increase of rotational speed.This study provides a basis for thermal error control and compensation modeling in high-speed machine tools.
high-speed electric spindlethermal errortemperature risedetection
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