某新型飞机平尾的装配过程涉及一批高精度、高光洁度,承力结构件间的大尺寸连接孔的加工,主要有:平尾中央盒段对接孔、平尾外伸段对接孔、平尾外伸段桶形螺母孔。由于这些孔的加工材料厚、尺寸大、数量多、精度高,且相当一部分孔为盲孔。因此为保证制孔质量,提高装配 The assembly process of a new type of aircraft horizontal tail involves the processing of a large number of connecting holes between high-precision, high-finish and load-bearing structural members. The main parts are: the flat tail central box section docking hole, the flat tail extension section docking hole, the flat tail extension section Barrel nut hole. Due to the thick material of these holes processing, size, quantity, high precision, and a considerable part of the holes for blind holes. Therefore, to ensure the quality of the hole, improve assembly