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Assembly Modeling

TECH 4472

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Example

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Two Approaches to Modeling

Top Down Modeling (extracting parts)

Bottom Up Modeling (assembling parts)

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Master Model Approach

Start with a NEW file, not the main part.

Insert the main part positioned at the Absolute Origin.

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Assemble Other Components by Constraints

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Touch Align

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Don't Overconstrain Position

Just like constraints on sketches, positions can be overconstrained (broken).

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Making a Subassembly

Assemblies can become sub-assemblies.

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Accessing Datum Features

Use "Entire Part" as Reference Set

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Assembling the O-Ring (tricky)

  • Use "Entire part" as reference set.
  • Align datum axis (Touch Align - Infer Center/Axis) with axis of spool.
  • Constrain datum plane at a distance from face of o-ring gland (.0625). You may need to use an "alternate solution."
  • To Hide the Datums, go to Format -> Layer Settings and make layer 61 invisible.

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Moving Component

Use movement to see constraints work.

"Move Component"

  • Motion by constraints

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Work Part, Displayed Part

Enables editing "drill-down"

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Assembly Sequence Animation

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Top-Down Assembly

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Beyond Assemblies

Routing, Electrical & Mechanical

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