渐开线齿轮滚切一般应满足下述三个条件:(1)滚刀与被切齿轮法向模数相等;(2)滚刀与被切齿轮分度圆上的法向压力角相等;(3)滚刀工作部分有效长度不得小于有效啮合线在齿条基线上的投影长度。满足前两个条件,可以使切出的齿轮能正确啮合;满足第三个条件,可以保证切出完整的渐开线齿形。但在实际生产中,滚刀长度对渐开线齿形造成的影响往 Involute gear hobbing generally should meet the following three conditions: (1) hob and cut gear equal to the normal modulus; (2) cutter and cut gear rounding the normal pressure angle equal; (3) The effective length of working part of the hob shall not be less than the projected length of the effective engaging line on the base of the rack. Meet the first two conditions, you can cut the gear can be properly engaged; to meet the third condition, you can ensure that the complete involute tooth cut out. However, in actual production, hob length on involute tooth shape caused by