工廠生產(chǎn)及質(zhì)量培訓(xùn)——形位公差理念(編輯修改稿)
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【文章內(nèi)容簡介】 Fundamental Rules 24 ? Rule 4 (除位置度以外幾何公差之應(yīng)用原則 ) 對于位置度以外的幾何公差 ,沒有特殊標(biāo)識的以 RFS(不相關(guān)原則 )處理 . ? Rule 3 (Other than tolerance of position rule) For other than a tolerance of position, RFS applies with respect to the tolerance, datum reference, or both, where no modifier is specified. MMC must be specified in the feature control frame when it is appropriate and desired. RFS applies RFS applies MMC is specified 基本原則 (4) Fundamental Rules 25 定義 與 應(yīng)用 Definition and Application 26 Controls Form controls never use a datum reference. 27 Flatness Definition ? 實(shí)際被測要素對理想平面的允許變動 . A flatness tolerance is the amount which surface elements are permitted to vary from a true plane. ?距離為平面度公差值 t的兩平行平面 之間的區(qū)域 . A flatness tolerance zone is the distant between two parallel plane spaced apart a distance equal to the flatness tolerance value. 28 flatness tolerance zone The surface must lie between two parallel planes apart Limits set by Rule 1 Application Flatness 29 Straightness ? 根據(jù)不同的設(shè)計(jì)要求 ,直線度公差可以有幾種不同形狀的公差帶 . A straightness control has a different tolerance zone depending upon its application to a feature or to a featureofsize. Definition ? 實(shí)際被測要素 (線要素 )對理想直線的允許變動 . A straightness tolerance is the amount which line elements are permitted to vary from a true line. 30 Straightness Straightness of Features 31 Straightness Straightness of Featureofsize 32 Straightness Straightness of Featureofsize(MMC) 33 Circularity ? 在同一正截面上 .半徑差為圓度公差值的同心圓之間的區(qū)域 . A circularity tolerance zone is two concentric circles spaced apart a radial distance equal to the circularity tolerance value. Definition ? 實(shí)際被測要素對理想圓的允許變動 . A circularity tolerance is the amount which surface elements of the diameter may vary from a theoretical circle. 34 Circularity Application 35 Cylindricity ? 半徑差為圓柱度公差值的兩同軸圓柱面之間的區(qū)域 . A cylindricity tolerance zone is two concentric cylinders spaced apart a radial distance equal to the cylindricity tolerance value. Definition ? 實(shí)際被測要素對理想圓柱的允許變動 . A cylindricity tolerance is the amount which surface elements of a cylinder may be allowed to vary from a theoretically perfect cylinder. 36 Application Cylindricity 37 Controls 38 Perpendicularity
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