Assembly modeling lecture

00:00

Assembly modeling

00:02

After completing this lecture,

00:04

you'll be able to

00:05

understand assembly modeling infusion,

00:07

identify bodies and components,

00:09

describe the use of joints and understand internal and external references.

00:14

First,

00:14

we need to understand what is an assembly.

00:17

Assemblies contain multiple components that make up a larger design.

00:21

Components can be internal or external to an assembly.

00:24

Components can include joints or relationships

00:27

that allow for constrained motion.

00:29

Components are containers for body,

00:31

sketches,

00:32

features,

00:32

coordinate systems,

00:33

and more,

00:34

and assemblies are used in exploded view animations and drawings.

00:39

So now let's talk about bodies and components.

00:42

Bodies represent solid model geometry in a design or assembly.

00:47

Components represent a container for bodies that include a unique

00:50

origin and other design elements such as features and sketches.

00:54

We can also have groups of components which create subassemblies.

00:58

Fusion will track components from the top level all the way down through in

01:02

each individual coordinate system or origin folder

01:05

that is contained in each component.

01:07

These origins are tracked anytime a component moves,

01:10

whether it's through the use of joints or if it's simply dragged on the canvas area.

01:14

Joints will define the degrees of freedom between components.

01:19

Let's talk about some common assembly tools.

01:22

We have new component,

01:24

which creates an empty or from body component for standard or sheet metal bodies.

01:29

We have joint and as-built joint that allows us to position

01:32

components and define their degrees of freedom relative to each other.

01:36

Rigid group is a subset of joints which allows

01:39

us to lock the position of selected components,

01:41

so they move as a single fixed object.

01:44

Motion links will create a connected relationship between two joints.

01:49

Contact sets allow us to enable solid body contact

01:52

analysis between selected components inside of a contact set.

01:56

And emotion study is a kinematic motion analysis

01:59

based on joint motion and degrees of freedom.

02:03

So what are joints?

02:05

Joints will allow a user to select positions of two components,

02:09

position them relative to the selection,

02:10

and define their degrees of freedom.

02:13

As built joints allow a user to define degrees

02:15

of freedom between components using their current assembly position.

02:19

We have several different joint types that we can use inside a fusion.

02:23

First,

02:23

we have a rigid joint which has 0 degrees of freedom.

02:26

A revolute joint allows 1 degree of rotation.

02:29

A slider allows 1 degree of translation.

02:32

Cylindrical will allow 1 degree of rotation and

02:38

Pin slot allows for 1 degree of rotation

02:40

and 1 degree of translation on different axes.

02:43

Planar will be 2 degrees of translation and 1 degree of rotation.

02:47

And finally,

02:47

a ball joint allows for 3 degrees of rotation.

02:52

What are assembly references?

02:54

References include internal and external references.

02:58

Internal references will be components that are created directly in a design.

03:03

They are saved in the design and only exist in that design,

03:06

commonly referred to as top down.

03:09

External are components that are saved externally in their own

03:12

design and are referenced or linked in an assembly.

03:15

External components have a chain link icon in the

03:17

browser and are commonly referred to as bottom up.

03:21

We also have derived and distributed designs.

03:24

A distributed design is a design that contains externally referenced components,

03:28

and a derived design is a component that is

03:31

saved externally and references back to an assembly.

03:34

Derived designs don't carry any feature history and

03:37

maintain a link to their parent design.

03:40

So which assembly method is best?

03:42

There is no correct answer to which modeling approach you should take,

03:45

but there are a few key differences that may push you one way or the other.

03:49

Externally referenced components can be reused in other designs easily.

03:53

Externally referenced components or subassemblies can be worked

03:56

on by other users without reserving a design.

03:59

And derived components can be used to design fixturing

04:02

or packaging for manufacture without affecting the original design.

04:06

So in conclusion,

04:07

assemblies are groups of components that make up a larger design.

04:11

Components are containers for bodies,

04:13

sketches,

04:13

features,

04:14

origins,

04:14

and more.

04:16

Assemblies can have internal and external references,

04:18

and assemblies use joints to create a relationship between components for motion.

Video transcript

00:00

Assembly modeling

00:02

After completing this lecture,

00:04

you'll be able to

00:05

understand assembly modeling infusion,

00:07

identify bodies and components,

00:09

describe the use of joints and understand internal and external references.

00:14

First,

00:14

we need to understand what is an assembly.

00:17

Assemblies contain multiple components that make up a larger design.

00:21

Components can be internal or external to an assembly.

00:24

Components can include joints or relationships

00:27

that allow for constrained motion.

00:29

Components are containers for body,

00:31

sketches,

00:32

features,

00:32

coordinate systems,

00:33

and more,

00:34

and assemblies are used in exploded view animations and drawings.

00:39

So now let's talk about bodies and components.

00:42

Bodies represent solid model geometry in a design or assembly.

00:47

Components represent a container for bodies that include a unique

00:50

origin and other design elements such as features and sketches.

00:54

We can also have groups of components which create subassemblies.

00:58

Fusion will track components from the top level all the way down through in

01:02

each individual coordinate system or origin folder

01:05

that is contained in each component.

01:07

These origins are tracked anytime a component moves,

01:10

whether it's through the use of joints or if it's simply dragged on the canvas area.

01:14

Joints will define the degrees of freedom between components.

01:19

Let's talk about some common assembly tools.

01:22

We have new component,

01:24

which creates an empty or from body component for standard or sheet metal bodies.

01:29

We have joint and as-built joint that allows us to position

01:32

components and define their degrees of freedom relative to each other.

01:36

Rigid group is a subset of joints which allows

01:39

us to lock the position of selected components,

01:41

so they move as a single fixed object.

01:44

Motion links will create a connected relationship between two joints.

01:49

Contact sets allow us to enable solid body contact

01:52

analysis between selected components inside of a contact set.

01:56

And emotion study is a kinematic motion analysis

01:59

based on joint motion and degrees of freedom.

02:03

So what are joints?

02:05

Joints will allow a user to select positions of two components,

02:09

position them relative to the selection,

02:10

and define their degrees of freedom.

02:13

As built joints allow a user to define degrees

02:15

of freedom between components using their current assembly position.

02:19

We have several different joint types that we can use inside a fusion.

02:23

First,

02:23

we have a rigid joint which has 0 degrees of freedom.

02:26

A revolute joint allows 1 degree of rotation.

02:29

A slider allows 1 degree of translation.

02:32

Cylindrical will allow 1 degree of rotation and

02:38

Pin slot allows for 1 degree of rotation

02:40

and 1 degree of translation on different axes.

02:43

Planar will be 2 degrees of translation and 1 degree of rotation.

02:47

And finally,

02:47

a ball joint allows for 3 degrees of rotation.

02:52

What are assembly references?

02:54

References include internal and external references.

02:58

Internal references will be components that are created directly in a design.

03:03

They are saved in the design and only exist in that design,

03:06

commonly referred to as top down.

03:09

External are components that are saved externally in their own

03:12

design and are referenced or linked in an assembly.

03:15

External components have a chain link icon in the

03:17

browser and are commonly referred to as bottom up.

03:21

We also have derived and distributed designs.

03:24

A distributed design is a design that contains externally referenced components,

03:28

and a derived design is a component that is

03:31

saved externally and references back to an assembly.

03:34

Derived designs don't carry any feature history and

03:37

maintain a link to their parent design.

03:40

So which assembly method is best?

03:42

There is no correct answer to which modeling approach you should take,

03:45

but there are a few key differences that may push you one way or the other.

03:49

Externally referenced components can be reused in other designs easily.

03:53

Externally referenced components or subassemblies can be worked

03:56

on by other users without reserving a design.

03:59

And derived components can be used to design fixturing

04:02

or packaging for manufacture without affecting the original design.

04:06

So in conclusion,

04:07

assemblies are groups of components that make up a larger design.

04:11

Components are containers for bodies,

04:13

sketches,

04:13

features,

04:14

origins,

04:14

and more.

04:16

Assemblies can have internal and external references,

04:18

and assemblies use joints to create a relationship between components for motion.

After completing this video, you’ll be able to:

  • Understand assembly modeling in Fusion.
  • Identify bodies and components.
  • Describe the use of joints.
  • Understand internal and external references.

Lecture

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