一、前言 球形接头是直升飞机上发动机架的重要零件。它共有五种形式,其中一种如图1所示。其他四种,有的水平接头在零件相应位置的另一端,方向相反;有的如图1A-A剖面上的斜接头分左右对称。有的在C-C剖面上的接头数量较少;不过各类接头的尺寸基本相同。此类零件形状复杂,均采用锻件制成。而且要求锻件的外球面不再加工。这类锻件接头多,而 I. Introduction The spherical connector is an important part of the helicopter’s engine frame. It has five forms, one of which is shown in Figure 1. The other four, some horizontal joints at the other end of the corresponding parts of the location, the opposite direction; some as shown in Figure 1A-A cross-section of the diagonal symmetry. Some have fewer joints on the C-C profile; however, the sizes of the various joints are essentially the same. Such parts are complex shapes, all made of forgings. And forgings require the outer spherical surface is no longer processing. This type of forging joints, and more