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root form diameter(dFf)是渐开线起始圆吧?base diameter是基圆直径。( u1 ^6 ?1 l6 ]1 v8 b6 K2 t' a 下面是ISO 21771-2007 5.4.1的一段话9 r9 R6 s* b/ R# [% H “The root form diameter, dFf, is the start of the involute portion of the profile. For an external gear it is the! y. s; {) i( X6 `* a, x greatest of the base diameter, db, or the diameter of the intersection of the flank with the root fillet or trochoid( ~! i. S0 z, K8 d# T (taking into account undercut if necessary)” ' g3 \ r$ c3 R G* r0 {% P& }& ]" [英语不好,翻错了请轻拍:渐开线起始圆是齿形渐开线起点所在的圆。对外齿轮来说最好就是基圆直径,或齿侧与过渡圆角的连接点(如果有根切,需要考虑在内)。% C# @# t) b, ?( _* M 问题:翻译有没有问题?. T( k2 H* u8 V* r 如果没问题,渐开线起始圆真的越靠近基圆越好吗,靠太近渐开线齿轮好加工吗? |
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