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Table Of Contents
- Getting Started with Autodesk® Mechanical Desktop®
- Autodesk® Mechanical Desktop® Tutorials
- Using the Tutorials
- Creating Parametric Sketches
- Constraining Sketches
- Creating Sketched Features
- Key Terms
- Basic Concepts of Sketched Features
- Creating Extruded Features
- Editing Extruded Features
- Creating Loft Features
- Editing Loft Features
- Creating Revolved Features
- Editing Revolved Features
- Creating Face Splits
- Editing Face Splits
- Creating Sweep Features
- Editing Sweep Features
- Creating Bend Features
- Editing Bend Features
- Creating Work Features
- Creating Placed Features
- Key Terms
- Basic Concepts of Placed Features
- Creating Hole Features
- Creating Thread Features
- Editing Hole Features
- Editing Thread Features
- Creating Face Drafts
- Editing Face Drafts
- Creating Fillet Features
- Editing Fillet Features
- Creating Chamfer Features
- Editing Chamfer Features
- Creating Shell Features
- Editing Shell Features
- Creating Surface Cut Features
- Editing Surface Cut Features
- Creating Pattern Features
- Editing Pattern Features
- Editing Array Features
- Creating Copied Features
- Editing Copied Features
- Creating Combined Features
- Editing Combined Features
- Creating Part Splits
- Editing Part Splits
- Using Design Variables
- Creating Parts
- Creating Drawing Views
- Creating Shells
- Creating Table Driven Parts
- Assembling Parts
- Combining Parts
- Assembling Complex Models
- Key Terms
- Basic Concepts of Complex Assemblies
- Starting the Assembly Process
- Creating Local and External Parts
- Applying Assembly Constraints
- Creating New Parts
- Creating Subassemblies
- Completing Assemblies
- Editing Mechanical Desktop Parts
- Reloading External References
- Reviewing Assembly Models
- Creating Bills of Material
- Finishing Drawings for Plotting
- Creating and Editing Surfaces
- Combining Parts and Surfaces
- Surfacing Wireframe Models
- Key Terms
- Basic Concepts of Surfacing Wireframe Models
- Surfacing Wireframe Models
- Creating Trimmed Planar Surfaces
- Joining Surfaces on Complex Shapes
- Creating Swept and Projected Surfaces
- Creating Complex Swept Surfaces
- Using Projection to Create Surfaces
- Using Advanced Surfacing Techniques
- Viewing Completed Surfaced Models
- Working with Standard Parts
- Creating Shafts
- Calculating Stress on 3D Parts
- Toolbar Icons
- Desktop Tools
- Part Modeling
- Part Modeling ‰ New Part
- Part Modeling ‰ New Sketch Plane
- Part Modeling ‰ 2D Sketching
- Part Modeling ‰ 2D Constraints
- Part Modeling ‰ Profile a Sketch
- Part Modeling ‰ Sketched Features
- Part Modeling ‰ Placed Features
- Part Modeling ‰ Work Features
- Part Modeling ‰ Power Dimensioning
- Part Modeling ‰ Edit Feature
- Part Modeling ‰ Update Part
- Part Modeling ‰ Part Visibility
- Part Modeling ‰ Options
- Toolbody Modeling
- Assembly Modeling
- Surface Modeling
- Surface Modeling ‰ AutoSurf Options
- Surface Modeling ‰ Swept Surface
- Surface Modeling ‰ Loft U Surface
- Surface Modeling ‰ Blended Surface
- Surface Modeling ‰ Flow Wires
- Surface Modeling ‰ Object Visibility
- Surface Modeling ‰ Surface Display
- Surface Modeling ‰ Stitches Surfaces
- Surface Modeling ‰ Grip Point Placement
- Surface Modeling ‰ Lengthen Surface
- Surface Modeling ‰ Extract Surface Loop
- Surface Modeling ‰ Edit Augmented Line
- Surface Modeling ‰ Wire Direction
- Scene
- Drawing Layout
- Mechanical View
- Index
Basic Concepts of Assembling Parts | 401
Basic Concepts of Assembling Parts
You create assemblies from parts, either combined individually or grouped
in subassemblies. Mechanical Desktop builds these individual parts and
subassemblies into an assembly in a hierarchical manner according to rela-
tionships defined by constraints. Using the Desktop Browser, you can
restructure the hierarchy of an assembly as needed, while retaining the
design constraints. See “Using the Desktop Browser” on page 414.
As in part modeling, the parametric relationships allow you to quickly
update an entire assembly based on a change in one of its parts.
You can build 3D solid assembly models from two or more parts or subassem-
blies. Like part features, parts and subassemblies act as building blocks.
The following process for building assemblies and subassemblies is similar to
that for building parts:
■ Lay out the assembly.
■ Create the base part.
■ Create the remaining parts.
■ Create the assembly and subassemblies.
■ Analyze the assembly.
■ Modify the assembly as necessary.
When you create an assembly file, you can create your parts in the assembly
drawing, or you can reference external files.
Using externally referenced parts gives you more flexibility over the control
of your assembly. If you need to make modifications to any of your parts, you
can open the individual part file and make changes to it. Because more than
one drawing can be open in the same Mechanical Desktop session, you can
immediately see the effects of your changes in the assembly file. You can also
edit external references from within the assembly file. This is particularly use-
ful in smaller assemblies. Depending on your system resources, you can edit
external files individually if they are part of a large assembly.
After you have assembled your parts, you need to check the assembly for
interferences. You may also want to perform mass property calculations on
your parts to ensure that they are structurally sound.
Finally, you need to document your design. To make it easier to visualize your
design, you may want to adjust, or tweak, your assembly and add trails to
indicate how your parts fit together. Then, you set up your drawing views
and add information, such as reference dimensions and annotations, before
finalizing the drawing for plotting.