Ultrahigh-speed and ultraprecise air static piezoelectric spindle active thermal control system and method thereof

Abstract

The invention discloses an ultrahigh-speed and ultraprecise air static piezoelectric spindle active thermal control system and a method thereof. Temperature sensors are respectively arranged on a rear radial bearing lining, a built-in motor stator coil end part winding, a front radial bearing lining, a left thrust bearing, a right thrust bearing, a water inlet and a water outlet. A data acquisition and processing card is connected with all the temperature sensors and a fluid flowmeter. An industrial computer is connected with the data acquisition and processing card and an industrial controller. The industrial controller is connected with an automatic cycle water cooling machine and an electromagnetic proportion valve. The electromagnetic proportion valve is connected with the automatic cycle water cooling machine to perform flow regulation of cooling water. The flow of the cooling water is monitored in real time through the fluid flowmeter. Real-time feedback accurate thermal control of the air static piezoelectric spindle under the condition of sudden change of the process parameters can be realized so as to meet the ultraprecise processing requirement of the air static piezoelectric spindle under different work rotating speed.

Description

technical field [0001] The invention relates to an active thermal control system and method for an ultra-high-speed and ultra-precision aerostatic electric spindle, and belongs to the technical field of electric spindle thermal control. Background technique [0002] Ultra-precision machine tools are developing in the direction of high precision, high efficiency and high speed. Among them, ultra-high-speed ultra-precision aerostatic electric spindle components are one of the main components to realize high-precision and high-efficiency cutting technology, and are the core functional components of ultra-precision machine tools. In order to achieve ultra-high-speed and ultra-precision machining, the electric spindle system is typically characterized by air static pressure support and electromagnetic direct drive. There is no direct mechanical contact between relative moving parts, which is conducive to improving the speed and accuracy. Due to the heating of the motor stator coi...

AI Technical Summary

Problems solved by technology

The electromagnetic effect of the built-in motor of the electric spindle is also affected by the thermal behavior of the electric spindle, which causes the output torque and speed of the spindle to fluctuate with the change of the temperature field

To sum up, on the one hand, the thermal behavior of the electric spindle produces axial thermal errors that directly affect the ultra-precision machining accuracy; on the other hand, it changes the dynamic behavior of the ultra-high-speed shaft core, which in turn affects the rotation accuracy of the electric spindle

Due to the wide range of speed regulation of the ultra-high-speed ultra-precision aerostatic electric spindle, the sudden acceleration of the spindle under the complex process requirements leads to a surge of internal heat. The traditional temperature control technology has the characteristics of large delay, which can no longer meet the requirements of real-time processing accuracy.

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