Turn-milling combination machining method and realization of high-precision gyro torquer framework

For an aerospace gyroscope torquer, the framework(i.e. the coil skeleton) of the core component is made of glass-ceramics, and the dividing precision of the excircle grooves and the coaxiality with the inner hole directly affect the working precision of the torque converter, which are always over tolerance in practical processing. Aiming at the machining problem of torque framework, the framework structure and the present processing method are analyzed, and a turning and milling combination machining method is introduced into the machining of the astronavigation gyro torquer framework. The processing scheme of the inner hole and excircle grooves in one clamping is adopted, and the turn-milling combination clamp tooling is designed. By selecting the processing equipment correctly and optimizing the tool path, cutting parameters and cooling system, the dividing precision of the excircle grooves and the coaxiality with the inner hole are improved, and the processing time of single workpiece is shortened from 6h to 4h, which verifies the rationality of the turn-milling scheme. The proposed method has been applied successfully in several batches of the gyro torquer framework. © 2019, Editorial Department of Journal of Chinese Inertial Technology. All right reserved.