Part modeling lecture

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Part modeling.

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After completing this lecture, you'll be able to

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understand solid modeling and fusion.

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Identify creation tools,

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identify modification tools and understand direct modeling.

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So first, we need to start with what is solid part modeling.

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Solid part modeling is the creation of solid bodies using tools such as extrude,

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solid geometry will have external boundary faces with an enclosed volume.

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Solids can be created with primitive sketches faces as well as other methods.

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Solid bodies are going to be the foundation of parametric modeling

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and solid modeling tools can be used to add or remove material from a body.

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So next, let's take a look at some common solid creation tools.

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First, one of the most common tools to get started on a 3D design is the extrude tool.

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It'll allow you to add depth to an open

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or closed sketch profile or the selection of planar faces

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revolve is another common tool that allows you to take a sketch

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profile or a planar face and revolve it around a selected axis.

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The sweep tool will allow you to take a sketch profile

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or planar face and push it along a selected path.

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The loft tool will allow you to create a

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transitional shape between two or more sketch profiles or faces

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note that when we're talking about a solid loft,

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these faces do need to be plainer and the sketch profiles also need to be in two D.

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And last one of the common tools that we have here is the whole tool.

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This will allow you to create a hole based on user specified values and selections.

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Common holes include holes that are threaded ones

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that have counter boards or counter sinks.

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Next, let's talk about some common solid modification tools

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after solid bodies are created,

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it's common to use solid modification tools to do things like add

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a filet which rounds the edges of a solid body at a

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chamfer which allows you to bevel the edges of a solid body,

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use shell to remove material from a part interior.

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This creates a hollow cavity with walls of a specified thickness,

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use draft to apply a fixed or parting line, draft angle to planar faces.

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Commonly used inside of injection molded design parts

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combine which allows you to join,

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cut or intersect two or more solid bodies to create a single solid body

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and split tool which actually combines a couple of different tools

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can create new bodies by dividing selected bodies using a profile face or plane.

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While these aren't all the solid modification tools,

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these are some of the most common ones you'll likely see as you get started in fusion.

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Next, let's talk about how solids are created.

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First, we have sketches,

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sketches can be used as the basis for a new feature creation

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features created from sketches will remain linked.

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For example, if you update the size of a sketch,

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the solid body that was created from that sketch will also be updated.

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Next, we can also use faces.

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These planar faces will allow you to select them

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as the creation tool for things like extrude,

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revolve and sweet.

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And last, we have a third method that's fairly common using primitives.

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Now, primitives are basic shapes that can be used as the starting point.

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This allows you to define simple shapes like rectangles

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and circles and use them for things like extrudes.

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However, it doesn't save that sketch information.

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Primitive bodies are considered to be a direct modeling approach.

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Next, let's talk about what is direct modeling.

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A direct modeling is manipulating geometry,

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directly pushing or pulling faces and features in 3d,

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moving or copying geometry to a new location

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or deleting or removing features through face selection.

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This is a great set of tools for imported designs

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or modifying designs with complex feature history and relationships.

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Whenever we're dealing with imported designs,

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they will come in without feature history.

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Anything created in fusion 360 with the history

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capture turned on will retain that future history.

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Next, let's talk about solids in the browser.

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Solid bodies can be located in a body's folder at the top level of a design

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or they can be inside of individual components.

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Solid bodies are displayed as a gray cylinder

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and components are displayed as a cube.

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We also have the option to see surfaces displayed in the body folder.

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These will be displayed as an orange partially open cylinder

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and we also have mesh bodies.

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These will be displayed as a yellow open cylinder with triangulated faces.

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Note that we can also see multi

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components as well as things like form or free form bodies.

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These are only going to be the most common things that

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we'll see in the browser as we get started modeling.

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So in conclusion, solids can be created from sketches, faces or primitives.

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Solids are the foundation of parametric modeling of parts and assemblies

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modification tools make changes to solid geometry

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such as rounding corners or drafting faces

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features created from a sketch or sketches will maintain a link and can be updated.

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Parametric

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and direct modeling is a subset of modeling tools

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that work by moving offsetting or deleting geometry directly.