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随着小模数齿轮工艺水平的不断提高,加工端面齿轮的方法,从一般采用仿形分度铣齿法提高到在滚齿机上用改进过的小模数齿轮滚刀进行加工,这种方法称之为近似仿形滚切法,这种方法加工的齿轮质量好,生产效率高(见图1)。目前在滚齿机上用近似仿形法,加工端面齿轮的计算公式是按照90°锥角的锥齿轮大端(外圈直径)与同模数、同压力角、同齿数的直齿圆柱齿轮的分度圆直径相同。D=mZ,这样端面齿轮大端的周节(相邻两齿的弧节距)和直齿圆柱齿轮的分度圆周节相等,并且在整个半径方向上齿槽宽度相等。由于存在一定的齿宽,所以就存在小端
With the continuous improvement of the craft level of small modulus gear, the method of machining the face gear is improved from the general adoption of the indexing milling method to the hobbing machine with the improved small modulus gear hob, this method is called The approximate contouring hobbing method, this method of processing the gear quality, high production efficiency (see Figure 1). Currently hobbing machine with approximate profiling method, the processing of face gear is calculated according to the 90 ° taper bevel gear big end (outer diameter) with the same modulus, with the pressure angle, the same number of teeth spur gear Degree of circle the same diameter. D = mZ, so that the large end of the face gear (the pitch of two adjacent teeth) is equal to the pitch circle of the spur gear and has the same width of the teeth in the entire radial direction. As there is a certain tooth width, there is a small end