(LMC) • 形体轴心线 Axis of A Feature • 形体中平面 Center Plane of A Feature • 基本尺寸 Basic Dimension • 内部边界定义和计算 IB Definition Formula • 外部边界定义和计算 OB Definition Formula • 内部/外部边界 RFS IB/OB RFS • 内部/外部边界 MMC IB/OB MMC • 内部/外部边界...
目录主题几何特性符号2通用符号3术语和定义4半径和控制半径6统计公差符号7形体控制框8一般原则9基准12平面度33直线度34圆度36圆柱度37垂直度38倾斜度
Position(appliedtoaelongatedholes-boundaryconcept)61 -61 62 63 64 65 66 68 70 71 72 73 74 75 75 77 1 Position(usedtocontrolsymmetry)62 ProjectedToleranceZone63 TheFixedFastenerFormula64 TheFloatingFastenerFormula65 CompositePositionTolerancing66 Position(multiplesinglesegmentcontrol)68 ZeroToleranceatMMC...
61 Position (used to control symmetry)………62 Projected Tolerance Zone………63 The Fixed Fastener Formula………64 The Floating Fastener Formula………65 Composite Position Tolerancing……… 66 Position (multiple single segment control)………68 Zero Tolerance at...
Position (used to control symmetry)62 Projected Tolerance Zone63 The Fixed Fastener Formula64 The Floating Fastener Formula65 Composite Position Tolerancing 66 Position (multiple single segment control)68 Zero Tolerance at MMC70 Concentricity 71 Symmetry72 Conversion Chart 73 Surface Texture Definitions 74...
•位置度控制角度孔 PositionControlsHoleatAngle •投影公差带 ProjectedToleranceZone •松动紧固件计算 FloatingFastenerFormula 固定紧固件计算 Fi d F t F l GD&T 7/21 •固定紧固件计算 FixedFastenerFormula •复合位置度 CompositePosition ...
The worst case for assembly purposes would be the smallest hole that is also out of position: 5.8 – 0.3 = 5.5. This virtual condition represents the “usable” area that the mating pin must fit within: Now, virtual condition is usually easy to identify with — think of assembling pins an...
The Floating Fastener Formula„„„„„„„„„„„„„„„„„„„„„„„„„„„„65 Composite Position Tolerancing„„„„„„„„„„„„„„„„„„„„„„„„„„„ 66 ...