Positioning fixture and processing method for rotor cover of gyro motor dynamic pressure air bearing

Abstract

The invention relates to a precision turning processing method and a positioning fixture for thin-walled parts, in particular to a positioning fixture and a processing method for a rotor cover of a dynamic pressure air bearing of a gyro motor. The positioning fixture includes a spherical positioning mandrel, a positioning collar, a vibration damping pad, and a back-facing support seat. The spherical positioning mandrel is a stepped shaft with top holes provided on both ends, and includes a clamping section, a large thread section, a second guide cylinder section, a spherical positioning section, a ball table end face, and a first guide cylinder arranged in sequence from left to right. segments and small thread segments. The processing method includes the steps of the first step processing of the rotor cover, processing a series of spherical positioning mandrels, processing the positioning collar and the back support seat, selecting a suitable spherical positioning mandrel, and turning the rotor cover. The invention solves the problems of poor positioning accuracy, low processing efficiency, and crushing of the concave spherical surface in the existing processing methods, avoids the damage of the concave spherical surface by limiting 6 degrees of freedom, and ensures the processing accuracy of the rotor cover.

Description

technical field [0001] The invention relates to a precision turning positioning fixture and a processing method for a rotor cover of a gyro motor dynamic pressure air bearing, in particular to a precision turning and positioning fixture for a thin-walled part with a stepped stopper outer circle and a high-precision concave spherical surface reversely distributed and with high coaxiality requirements. Turning positioning fixture and processing method. Background technique [0002] Three-floating gyroscope and two-floating gyroscope are small electromechanical gyroscopes with high precision and long life. They are mainly used in inertial navigation and guidance fields such as space stations, satellites, and spacecraft. "heart", which plays a vital role in the performance and lifespan of the three-floating gyro. In the gyro motor, the dynamic pressure air bearing is the key structural component. The dynamic pressure effect of the gyro motor through the high-speed rotation of 3...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the unreasonable design of the positioning fixture for the precision machining of the rotor cover of the existing gyro motor dynamic pressure air bearing rotor, poor positioning accuracy, long alignment time during the process, low processing efficiency, and unreasonable cooperation between the concave spherical surface of the rotor cover and the positioning surface of the fixture caused the rotor The invention provides a positioning fixture and processing method for the rotor cover of the dynamic pressure air bearing rotor of a gyro motor to solve problems such as crushing and scratching of the concave spherical surface caused by the relative rotation of the cover and the spherical positioning mandrel.

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