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root form diameter(dFf)是漸開(kāi)線起始圓吧?base diameter是基圓直徑。$ L! `2 K! x* Y0 \9 M W. I
下面是ISO 21771-2007 5.4.1的一段話3 c, O! ]# n6 E* p' V8 J
“The root form diameter, dFf, is the start of the involute portion of the profile. For an external gear it is the
0 L) P; P: `5 z0 }greatest of the base diameter, db, or the diameter of the intersection of the flank with the root fillet or trochoid
2 I+ h4 L$ x: o(taking into account undercut if necessary)”
7 C4 T; E6 x) Z4 q, z# G; |. B英語(yǔ)不好,翻錯(cuò)了請(qǐng)輕拍:漸開(kāi)線起始圓是齒形漸開(kāi)線起點(diǎn)所在的圓。對(duì)外齒輪來(lái)說(shuō)最好就是基圓直徑,或齒側(cè)與過(guò)渡圓角的連接點(diǎn)(如果有根切,需要考慮在內(nèi))。
# `: C8 v; R* n% w問(wèn)題:翻譯有沒(méi)有問(wèn)題?
8 S/ B, O& c# p' |( d6 \3 f 如果沒(méi)問(wèn)題,漸開(kāi)線起始圓真的越靠近基圓越好嗎,靠太近漸開(kāi)線齒輪好加工嗎? |
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