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root form diameter(dFf)是漸開線起始圓吧?base diameter是基圓直徑。' c* C0 |" X. d4 b
下面是ISO 21771-2007 5.4.1的一段話
+ x' X% w+ Y) b“The root form diameter, dFf, is the start of the involute portion of the profile. For an external gear it is the
$ v5 n+ P t/ Y$ H5 x7 @greatest of the base diameter, db, or the diameter of the intersection of the flank with the root fillet or trochoid
) d$ r5 M& L5 p; o(taking into account undercut if necessary)”) F+ C! c& \! y/ T
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)。" Y# \, A3 d! c2 x" d0 |
問題:翻譯有沒有問題?+ v( A- i+ b( ?2 |$ k* o# J$ H
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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