001 ASME Y14.5M 公差 (CHS-EN)
- 格式：pdf
- 大小：4.40 MB
- 文档页数：82
SYMBOL˄ヺো˅
ASME Y14.5M
ISO
FEATURE CONTROL FRAME
݀ᏂḚḐ
DIAMETER/Ⳉᕘ
SPHERICAL DIAMETER/⧗Ⳉᕘ
AT MAXIMUM MATERIAL CONDITION
᳔ᅲԧᴵӊ
AT LEAST MATERIAL CONDITION
᳔ᇣᅲԧᴵӊ
Note: This is a change from the previous editions of the Y14.5 standard. The definition of the tolerance zone for the former term tangent radius, previously noted by the symbol R, is now meant to apply to a controlled radius (symbol CR). /⊼˖䖭ϾᰃҢ Y14.5 ᷛޚҹࠡⱘ⠜ᴀᬍব㗠ᴹⱘDŽⱘࠡܜᴃ䇁Ⳍߛञᕘⱘ݀ᏂᏺᅮНˈҹࠡ⫼ヺো R 㸼 冫ˈ⦄⫼㑺ᴳञᕘ˄ヺো CR˅㸼冫DŽ
2
Goeway eBooks
3 义 ݅ 82 义
STATISTICAL TOLERANCING SYMBOL/㒳䅵݀Ꮒヺো
Often, tolerances are calculated on an arithmetic basis. Tolerances are assigned to individual features on a component by dividing the total assembly tolerance by the number of components and assigning a portion of this tolerance to each component. When tolerances are stacked up in this manner, the tolerance may become very restrictive or tight. /݀Ꮒ㒣ᐌѢㅫᴃ⸔ᴹ䅵ㅫDŽ䗮䖛ḍ䚼ӊⱘ᭄䞣ᡞᘏⱘ㺙䜡݀Ꮒߚߦˈᑊᡞϔ䚼ߚ݀Ꮒᣛᅮ㒭↣ϔ䚼 ӊⱘᮍᓣˈ݀Ꮒ㹿ᣛᅮ㒭䚼ӊⱘϾ߿⡍ᕕDŽᔧ݀Ꮒҹ䖭辵ᮍᓣේᯊˈ݀Ꮒৃ㛑বᕫ䴲ᐌফ䰤ࠊ㗙㋻ᆚDŽ
1
Goeway eBooks
2 义 ݅ 82 义
NUMBER OF PLACES /໘᭄
8x
8x
COUNTERBORE/SPOTFACE
䬫≝༈ᄨ/ᄨষᑇ䴶
COUNTERSINK/䪏≝༈ᄨ
DEPTH/DEEP/⏅ᑺ
SQUARE/ℷᮍᔶ
ALL AROUND/਼ܼ
REGARDLESS OF FEATURE SIZE
NONE/ҔМг≵᳝
NONE/ҔМг≵᳝
ᗑ㾚⡍ᕕሎᇌ
PROJECTED TOLERANCE ZONE
ᡩᕅ݀Ꮒᏺ
X FREE STATE/㞾⬅⢊ᗕ
X TANGENT PLANE Ⳍߛ䴶
(Proposed)˄㹿ᦤ䆂ⱘ˅
X STATISTICAL TOLERANCE
1982 standard.
/ҹϟᰒ冫ⱘᰃ᳔䗮⫼ⱘヺোˈᎹЁˈᅗԩ݀Ꮒঞ݊ᅗⳌ݇ⱘሎᇌ㽕∖㘨ড়Փ⫼DŽϟ㸼ৠᯊ߫ߎ
ISO ᷛޚЁⳌᑨⱘヺোDŽ㒱䚼ߚヺো㸼冫ᰃϔḋⱘDŽϔᇥ䚼ߚ ASME Y 14.5, 1994 ᷛޚ⣀᳝ⱘヺোˈℷ
㹿ᦤ䆂⫼Ѣ ISO ᷛޚDŽᷛ䆄ⴔ“x”ⱘヺোᰃᮄⱘ㗙ᰃ⬅ҹࠡⱘ Y14.5M, 1982 ׂᷛޚ䅶ⱘDŽ
/ҹ㒳䅵݀Ꮒ
䆚߿ⱘ⡍ᕕᇚ㒳䅵ᄺᎹ㡎ࠊϟ⫳ѻˈ㗙ⳈࠄফϹḐⱘㅫ⊩㑺ᴳЎℶDŽ
In some cases, it may be desirable to state only the statistical tolerance and the arithmetic number will not be shown. In this case, a note such as the following must be placed on the drawing. /ᶤѯᚙމϟˈৃҹা㾘ᅮ㒳䅵݀Ꮒˈ㗠ϡᰒ冫ㅫᴃ᭄ᄫDŽ䖭辵ᚙމϟˈڣϟ䴶᠔冫ⱘ⊼䞞ᖙ乏ᬒᎹ ЁDŽ
3
Goeway eBooks
4 义 ݅ 82 义
Note:/⊼˖
FEATURES IDENTIFIED AS STATISTICALLY TOLERANCED
SHALL BE PRODUCED WITH
STATISTICAL PROCESS CONTROLS, OR TO THE MORE RESTRICTIVE ARITHMETIC LIMITS.
NONRIGID PARTS-FREE STATE CONDITION/䴲߮ᗻ䳊ӊ - 㞾⬅⢊ᗕᴵӊ
Unless otherwise specified, all dimensioning and tolerancing applies in a Free State condition with no restraint. Some parts, such as sheet metal, thin metal, plastics and rubber are no rigid in nature. It may be necessary to specify design requirements on the part in a natural or Free State as well as in a restrained condition. The restraint or force on the nonrigid parts is usually applied in such a manner to resemble or approximate the functional or mating requirements. /䰸䴲⡍߿ᣛᅮˈ᠔᳝ሎᇌᷛ⊼݀Ꮒᷛ⊼⫼Ѣ≵᳝䰤ࠊⱘ㞾⬅⢊ᗕDŽϔѯ䳊ӊˈ䇌བ䩷䞥ӊˈ㭘䞥ሲӊˈ ล᭭ӊ‵㛊㞾✊⢊ᗕϡᰃ߮ᗻⱘDŽ䳊ӊⱘ㞾✊⢊ᗕ㗙㞾⬅⢊ᗕҹঞফ䰤ࠊⱘᴵӊϟᣛᅮ䆒䅵䳔∖ৃ 㛑ᰃᖙ䳔ⱘDŽᇍ䴲߮ᗻ䳊ӊⱘ䰤ࠊᕅડ䗮ᐌҹ䖭ḋⱘᮍᓣ䖒ࠄⳌڣ䖥Ԑࡳ㛑ऍ䜡ⱘ䳔∖DŽ
NONE
DIMENSION NOT TO SCALE ሎᇌ≵ᣝ↨՟ ARC LENGTH/ᓻ䭓ᑺ X BETWEEN/ϸ㗙П䯈 SLOPE/᭰䴶
NONE
CONICAL TAPER/䫹ᔶ
ENVELOPE PRINCIPLE ࣙ㒰㒓ॳ⧚
NONE(implied)/˄ᱫᣛ˅ Note: * May be filled or not filled/⊼˖*ৃ㛑฿ᅲгৃ㛑ϡ฿ᅲ
1 义 ݅ 82 义
COMMON SYMBOLS/䗮⫼ヺো
Shown below are the most common symbols that are used with geometric tolerancing and other related dimensional requirements on engineering drawings. Note the comparison with the ISO standards. Most of the
X DATUM FEATURE
ޚ⡍ᕕ
*
*
DATUM TARGET
Ⳃޚᷛ
TARGET POINT/⚍ޚ
DIMENSION ORIGIN
ሎᇌॳ⚍
REFERENCE DIMENDION/খ㗗ሎᇌ
( 50 )
( 50 )
(Auxiliary dimension in ISO) /ISO Ё䕙ࡽⱘሎᇌ
RADIUS, CONTROLLED RADIUS/ञᕘˈ㑺ᴳञᕘ
There are two types of radii tolerance that can be applied, the radius and controlled radius. The radius (R) tolerance is for general applications. The controlled radius (CR) is used when it is necessary to place further restrictions on the shape of the radius, as in high stress applications. /᳝ϸ辵㉏ൟञᕘ݀Ꮒ㛑㹿ᑨ⫼˖ञᕘ㑺ᴳञᕘDŽञᕘ˄R˅݀Ꮒᰃ䗮⫼ⱘDŽ㗠㑺ᴳञᕘ(CR)߭⫼Ѣ䳔㽕 ᇍञᕘⱘᔶ⢊䖯ϔℹⱘ㑺ᴳᯊˈЎϔ辵催ᑨⱘᑨ⫼DŽ
Statistical tolerancing may be applied to features to increase tolerances and reduce manufacturing cost. To ensure compatibility, the larger tolerance identified by the statistical tolerance symbol may only be used where appropriate statistical process control will be used. A note such as the one shown below shall be placed on the drawing. /㒳䅵݀Ꮒৃ㛑ᑨ⫼ࠄ⡍ᕕϞˈ⫼ҹࡴ݀ᏂޣᇣࡴᎹ䌍⫼DŽЎֱ䆕ݐᆍᗻˈ 㹿㒳䅵݀Ꮒ⹂ᅮⱘ䕗݀ Ꮒৃ㛑া⫼ѢՓ⫼䗖ᔧⱘ㒳䅵Ꮉ㡎ࠊⱘഄᮍDŽڣϟ䴶᠔冫ⱘ⊼䞞ᇚ㹿ᬒ㕂ࠄᎹϞDŽ
FEATURES IDENTIFIED AS STATISTICALLY TOLERANCED STATISTICAL PROCESS CONTROLS.
