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root form diameter(dFf)是漸開線起始圓吧?base diameter是基圓直徑。! N2 G1 g& I. [# t
下面是ISO 21771-2007 5.4.1的一段話" B3 V( X T b3 Q
“The root form diameter, dFf, is the start of the involute portion of the profile. For an external gear it is the* s% V; s. y5 O1 n0 H9 @
greatest of the base diameter, db, or the diameter of the intersection of the flank with the root fillet or trochoid! S1 Q4 ^" k- k+ ?! Q- J
(taking into account undercut if necessary)”
' X" @+ d! B2 p( G9 I! N英語不好,翻錯了請輕拍:漸開線起始圓是齒形漸開線起點所在的圓。對外齒輪來說最好就是基圓直徑,或齒側與過渡圓角的連接點(如果有根切,需要考慮在內)。
# w g# s! L0 X ^/ l; w問題:翻譯有沒有問題?
. Z E( i* [* d, x 如果沒問題,漸開線起始圓真的越靠近基圓越好嗎,靠太近漸開線齒輪好加工嗎? |
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