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root form diameter(dFf)是渐开线起始圆吧?base diameter是基圆直径。) @. ~" | }+ [- ?$ r! K6 x
下面是ISO 21771-2007 5.4.1的一段话
7 D W1 Y0 e- ]5 P* S# D“The root form diameter, dFf, is the start of the involute portion of the profile. For an external gear it is the2 B' e( Y3 [! Z" D* r
greatest of the base diameter, db, or the diameter of the intersection of the flank with the root fillet or trochoid
R* t( \# @( ]; k+ W(taking into account undercut if necessary)”
& B$ D/ i+ u2 @" I* p8 ]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)。* G9 i6 {* B, ~7 e G# i5 y+ a3 H1 h
问题:翻译有没有问题?
' U+ Y8 Q U4 L7 ~ 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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