大型包容件与被包容件的连接,采用一般装配方法难以达到设计要求。我们采用冷装代替习惯的热装和压装法获得成功。冷装工艺是将常温被包容零件放入液氮中,使零件温度接近-196℃,尺寸缩小,然后装入包容件内,当零件恢复到常温后,体积膨胀,而达到过盈装配的目的。冷装工艺具有显著的特点,被包容件冷却时间短 Large containment pieces and the inclusion of the connection, using the general assembly method is difficult to meet the design requirements. We use the cold to replace the habit of hot-and press-loaded method to succeed. Cold process is the part of the room temperature is contained in liquid nitrogen, so that the temperature close to -196 ℃ parts, reduced size, and then packed into pieces, when the parts return to room temperature, the volume expansion, and to achieve the purpose of interference assembly . Cold process has significant features, is contained in a short cooling time