(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...
___ is used to define a zone within which the center, axis, or center plane of a feature of size is permitted to vary from true position. ___被用来规定一个带,在此带内,尺 寸要素的中心,轴线或中心平面许诺偏离真实位置。 3. Define “true position”概念“真实位置”___ 4. ___dimensions...
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...
文档分类: 高等教育--工学 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………
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...
59 Position(asabi-directionalcontrol)60 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(multiple...
The most important benefit of GD&T is that the system describes the design intent rather than the resulting geometry itself. Like a vector or formula, it is not the actual object but a representation of it. For example, a feature standing at 90 degrees to a base surface can be tolerance...
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...
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
For an external feature of size, virtual condition is calculated using the following formula. 对外 表面的尺寸要素,其实效状态采纳___计算。 a. MMC + LMC c. either b or d b或d b. MMC + geometric tolerance MMC+形位公差 d. MMC + bonus tolerance MMC+盈余公差 25. for an internal feature...