内齿轮的啮合具有一系列的特点。这些特点限制了它的应用范围及使用插齿刀插削齿轮的可能性。当插齿刀径向进给时,齿轮齿缘的被切去即属于这类特点之一。 图1简要地表示在所加工的齿轮上,齿缘切去的情况。在下列情况下,即假使在切入过程中,当插齿刀的齿缘b与直线O2Ou(同时给方 Internal gear meshing has a series of features. These features limit its scope of application and the possibility of using a gear cutter to insert a gear. When the gear cutter radial feed, gear tooth edge is cut to belong to one of these characteristics. Figure 1 shows schematically the cut off of the tooth edges on the machined gear. In the following cases, that is, if the cutting process, when the gear cutter tooth edge b and the straight line O2Ou (while giving the square