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Inventor_Parametric Constraints_Rev07_17_2009

# Inventor_Parametric Constraints_Rev07_17_2009 - First-Year...

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First-Year Engineering Program P. 1 Computer-Aided Design (CAD) Parametric Constraints Fundamentals Inventor® 2010, Chapter 6

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First-Year Engineering Program P. 2 Objectives Become familiar with the Parametric Constraints Dimensional constraints Parametric relations Geometric constraints Discuss constraints and Auto Dimensioning Practice using Parametric Constraints with Inventor
First-Year Engineering Program P. 3 Dimensional Constraints Tell us the size and location of individual geometric shapes. For example: Length Angle Distance Diameter Radius Not only tell us “what the size is ”, but also tell us “what the size must be ”.

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First-Year Engineering Program P. 4 Dimensional Constraints Inventor creates variable names to store each dimension Begin with a “d” and are numbered starting with zero as they are created d0, d1, d2,. ..
First-Year Engineering Program P. 5 Dimensional Constraints Can be entered as: A number: 15.75 An expression: (2 * 10 – 5)/3 Parametric Relation - An expression that relates a dimension to a previously named dimension (i.e. d0): (2 * d0 – 5)/3

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First-Year Engineering Program P. 6 Dimensional Constraints When editing dimensions on a sketch you can: Use standard arithmetic operations + - * / ^ () Enter expressions (“=“ are not needed) Nest parentheses Inventor follows the standard order of operations the same as Excel
First-Year Engineering Program P. 7 Dimension As an Expression Create a dimension using General Dimension Open dimension entry box Single left click (dimension mode) Double left click (not in dimension mode) Enter dimension as an expression

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First-Year Engineering Program P. 8 Parametric Relations New dimensions may be defined as functions of previously existing dimension(s) e.g. - d0/2 or 0.75*d1 When creating a new dimension:
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Inventor_Parametric Constraints_Rev07_17_2009 - First-Year...

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