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root form diameter(dFf)是漸開(kāi)線起始圓吧?base diameter是基圓直徑。
4 \" @+ E: N2 n8 V6 J; w7 x X下面是ISO 21771-2007 5.4.1的一段話/ r3 ~4 w5 R8 Q9 S1 r1 M& n9 w
“The root form diameter, dFf, is the start of the involute portion of the profile. For an external gear it is the7 s! P2 L9 C1 J% Y7 ?3 ]6 `- L
greatest of the base diameter, db, or the diameter of the intersection of the flank with the root fillet or trochoid
, z, p/ J; W# h" E8 f( B' W(taking into account undercut if necessary)”+ h8 y+ C" ?" o: a' @$ o
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))。3 ?& ], ^2 [/ ]; ?$ w
問(wèn)題:翻譯有沒(méi)有問(wèn)題?
4 A' t& o8 l( z 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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