Air-cooling temperature control principle based ultra-magnetostriction microfeed driving mechanism

Abstract

The invention discloses a giant magnetostrictive micro feeding drive device based on the principle of temperature control by gas cooling. The current is used for controlling the drive device to output the displacement and a gas-cooling temperature controlling device is used for suppressing the temperature increasing of the drive and heat output error to improve the control precision of the displacement output. The drive of the invention has the advantages of simple structure, relatively small drive current, stable operation and good frequency response. The forced air cooling is adopted to perform long-time temperature control and suppress the heat output error effectively. Furthermore, a belleville spring adds to the balance of the prestress, and a self-centering steel ball can maintain the output force at the shaft of the output mandril. Consequently, the control precision of the displacement output of the actuator can reach the micron grade or higher and can adapt to various poor working conditions. At the same time, the actuator has the advantages of small volume, light weight, large output force and highly precise displacement, can suppress the influence of the thermal deformation on the output displacement of the drive and can be used in the fields of ultra-precise machining and vibration control.

Description

technical field [0001] The invention relates to a drive device, in particular to a giant magnetostrictive micro-feed drive device based on the principle of air-cooling temperature control. Background technique [0002] Micro-displacement actuators have been widely used in ultra-precision machining, robotics, fluid machinery, vibration control, sonar systems and other fields. At present, the most widely used types are mechanical, hydraulic and piezoelectric. The frequency response of mechanical and hydraulic drivers is low, the output force is small, and the output displacement is difficult to meet the high-precision requirements; although the displacement resolution and frequency response of piezoelectric drivers are relatively high, but the output is small, it is easy to produce electrical breakdown, and Drift will occur. The giant magnetostrictive micro-displacement driver has the advantages of large displacement, strong force, fast response, high reliability, and low-vol...

AI Technical Summary

Problems solved by technology

Due to the closed internal space of the driver, the heat dissipation performance is poor, especially in the high-frequency and high-current working state, the temperature will rise rapidly and the thermal error will be significant, but the existing technology is too complicated to compensate the thermal error of the driver, and it is difficult to realize

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