内齿轮的加工一般很少采用成形分切法,这是因为该方法难度大,精度低所致。但在生产实践中,往往由于种种原因,也时有所见。尤其是在单件小批生产和维修工作中,用成形分切法加工大模数或者少齿数的内齿轮,几乎是无法避免的。我厂在人字齿轮铣床上采用成形分切法,成功的加工了模数为12,齿数为56,精度为Ⅲ级的大型内齿圈。下面予以简要介绍。一、加工方法被加工的内齿圈如图1所示;模数m=12,齿数Z=56,分圆压力角α_1=20°,精度Ⅲ级,齿面热处理硬度HB248。图2是内齿圈在人字齿轮铣床上装夹和加 Internal gear processing generally seldom used forming cutting method, which is due to the difficulty of the method, the accuracy is low. However, in production practice, often due to various reasons, but also from time to time see. Especially in a single small batch production and maintenance work, the use of forming and cutting method of processing a large number of gears or fewer teeth of the internal gear, almost unavoidable. I plant in the Herringbone gear milling forming division method, the successful processing of a module of 12, the number of teeth 56, the accuracy of the large-scale ring gear Ⅲ. Here is a brief introduction. First, the processing methods are processed ring gear shown in Figure 1; modulus m = 12, the number of teeth Z = 56, sub-circle pressure angle α_1 = 20 °, precision Ⅲ grade, tooth surface heat treatment hardness HB248. Figure 2 is the ring gear in the Herringbone gear milling machine and add