•正态分布NormalDistribution•PATAC的GD&T标准及背景•GD&T的主要概念•基准Datum•公差Tolerance–面轮廓度SurfaceProfile–位置度Position•一些原则–最大实体MMC–独立原则RFS•PATAC产品图纸讲述•练习考试 要求与说明 •参加培训的学员应已熟悉生产或产品工程图 •GD&T已广泛具体地应用在工程设计中...
区间符号 Between Symbol(轮廓度框格下的箭头):表示轮廓度公差带的适用区间 (7)ASME Y14.5中的非对称轮廓度,单边轮廓度(Unilateral Profile),如下图:公差带宽度0.3,允许向增加材料一侧的轮廓度公差为0,减少材料一侧的公差带为0.3; 不等双边轮廓度(Unequal bilateral Profile),如下图:公差带宽度0.3,允许向增加材料...
(Symbol) 基准形体参考(Datum Feature References) 材料原则对实体基准参考的影响 (Material Condition on FOS Datum Reference) 基准次序和材料原则的影响 (Datum Sequence and Material Condition) 形体控制框类型 (Types of Feature Control Frame) 规则: (Rules) 形体尺寸#1, #2 (Rule #1, #2) 公差补偿 (...
TYPESOFDIMENSIONINGGeometricCharacteristics&SymbolsSYMBOLS&ABBREVIATIONSDATUMREFERENCINGDatumReferenceFrameDATUMFEATURESYMBOLDatumFeatureDatumFeatureSymbolDATUMFEATURESYMBOL(Cont)FeatureSurfaceandextensionline WhenthedatumistheaxisorcenterplaneDATUMFEATURESYMBOL(Cont) WhenthedatumistheaxisDATUMFEATURESYMBOL(Cont)Wherenogeometric...
• 基准形体符号(Datum Feature Symbol)要连接到零件基准形体来指定一个 基准。 模拟基准 基准形体 测量从模拟基准起始 戴克伊几何尺寸和公差 Tec-Ease GDT 技术咨询师:龙东飞 基准形体模拟体(Datum Feature Simulator) • 一个基准形体模拟体(Datum Feature Simulator)是检测或加工设备(如: 测量或铣床台面),它们...
Symbol glossary for Geometric Dimensioning and Tolerancing (GD&T), every symbol is explained in verbal description, tolerance type, feature type, and notes when necessary.
表面素线圆柱形球形两平行对应面图5形位公差GDT符号和缩略语SymbolsandAbbreviations基准Datum公差框格FeatureControlFrame基本规则BasicRules形位公差GeometricToleranceTypeofTolerance公差类型Characteristic特性andSymbol符号Form形状Straightness直线度Flatness平面度Circularity(Roundness)圆度ProfileofaLine线轮廓度ProfileofaSurface面...
符号位置(Symbol Placement) 基准目标(Datum Target) 基准指导(Datum Guidline) 自由状态(Free State) 基准偏移 (Datum Shift) Lunch Break(午餐) 12:00 13:00 1:00 形体(Feature) 材料实体原则: MMC/LMC/RFS 13:00 14:00 1:00 形体尺寸#1, #2 (Rule #1, #2) 公差补偿 (Bonus Tolerance) 形状公差 ...
SYMBOL CYLINDRICITY SOMETIMES PROFILE PROFILE OF A LINE FROFILE OF A SURFACE ORIENTATION ANGULARITY PERPENDICULARITY PARALLELISM LOCATION POSITION CONCENTRICITY SYMMETRY RUNOUT CIRCULAR RUNOUT TOTAL RUNOUT 2 2 用符号 下图所示是在工程图中几何公差或其他尺寸要求使用最广泛的符号。标有“X”的符号为 新的符号...
The first symbol in the frame designates the tolerance as a positional tolerance. The -A- and -B- are the GDT datums to which the zone refers. For a two dimensional problem, the importance of -A- and -B- is not apparent, but we will see in the 3D example how they come into play...