ASME Y14.5M GD&T 中英文对照讲解.pdf

w w w . g o e w a y . c n G o e w a y e B o o k s ? 1义? 82义 MON SYMBOLS/???? Shown below are the mon symbols that are used with geometric tolerancing and other related dimensional requirements on engineering drawings. Note parison with the ISO standards. Most of the symbology is identical. There are a few symbols that are used in the ASME Y , 1994 standard that are being proposed for the ISO standards. The symbols marked with an “x” are new or revised from the previous , 1982 standard. /?????????????????Ё???????????????????????????? ISO??Ё???????????????????????ASME Y , 1994??????????????ISO??????“x”?????????????, 1982?????? SYMBOL???? ASME ISO FEATURE CONTROL FRAME ???? DIAMETER/?? SPHERICAL DIAMETER/??? AT MAXIMUM MATERIAL CONDITION ?????? AT LEAST MATERIAL CONDITION ?????? REGARDLESS OF FEATURE SIZE ?????? NONE/?Мг?? NONE/?Мг?? PROJECTED TOLERANCE ZONE ????? X FREE STATE/???? X TANGENT PLANE ??? (Proposed)?????? X STATISTICAL TOLERANCE ???? NONE/?Мг?? X RADIUS/?? R R X CONTROLLED RADIUS /???? CR NONE/?Мг?? SPHERICAL RADIUS/??? SR SR BASIC DIMENSION/????(theoretically exact dimension in ISO) ?ISOЁ???有????? X DATUM FEATURE ????* * DATUM TARGET ???? TARGET POINT/??? DIMENSION ORIGIN ???? REFERENCE DIMENDION/????(Auxiliary dimension in ISO) /ISOЁ?????( 50 ) ( 50 ) w w . g o e w a y . c n G o e w a y e B o o k s ? 2义? 82义 2 NUMBER OF PLACES /?? 8x 8x COUNTERBORE/SPOTFACE ????/???? COUNTERSINK/???? DEPTH/DEEP/?? SQUARE/??? ALL AROUND/?? NONE DIMENSION NOT TO SCALE ?????? ARC LENGTH/???? X BETWEEN/???П? NONE SLOPE/?? CONICAL TAPER/?? ENVELOPE PRINCIPLE ????? NONE(implied)/???? Note: * May be filled or not filled/??*????г????? RADIUS, CONTROLLED RADIUS/??????? 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 restrict