摘要
某型宇航陀螺仪力矩器核心零件线圈骨架所用材料为微晶玻璃,其外圆线槽的分度精度以及与内孔的同轴精度直接影响力矩器的工作精度,但在实际加工中一直存在着线槽分度精度和同轴度超差的问题。针对力矩器线圈骨架的加工难题,通过对力矩器线圈骨架结构以及现有加工方案进行分析,将车铣复合加工方法引入到力矩器线圈骨架的加工中。采用内孔和外圆线槽一次装卡加工的方案,设计了车铣复合加工工装,通过正确选取加工设备,优化设计走刀路径、切削参数和冷却系统,提高了力矩器线圈骨架外圆线槽的分度精度以及与内孔同轴精度,并将工件单件加工时间从6 h缩短至4 h,验证了车铣复合加工方案的合理性。目前,该项工艺方法已应用于某型高精度宇航陀螺线圈骨架的批量加工。
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 torquer 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 6 h to 4 h, which verifies the rationality of the turn-milling scheme. The proposed method has been applied successfully in several batches of the gyro torquer framework.
作者
李立杰
马明山
陈鹏
姚鑫
王宪云
LI Lijie;MA Mingshan;CHEN Peng;YAO Xin;WANG Xianyun(Tianjin Navigation Instruments Research Institute,Tianjin 300131,China)
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2019年第6期787-792,共6页
Journal of Chinese Inertial Technology
基金
装备预研项目(41417010602)
关键词
车铣复合
硬脆材料
微晶玻璃
分度
同轴
turn-milling combination
hard and brittle material
glass-ceramics
graduate
axiality
