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Apply several techniques for assembly modeling to the Saw model, including how to ground components, create a Rigid Group, and create an As-built Joint.
Type:
Tutorial
Length:
5 min.
Transcript
00:03
We can create joints and assembly model at any time in fusion.
00:06
But we only need to create joints if we require movement or if
00:11
we need to use the joint in the simulation environment in fusion,
00:14
if we don't require movement for our 3D models,
00:17
and we don't need to simulate working joints,
00:20
we can very quickly lock down our entire 3D model by creating a rigid group
00:25
to do this drag a selection window around the entire
00:28
model from right to left to select all the components
00:32
and from the tool bar. If we click assemble and then choose rigid group, then click.
00:37
OK. In the dialogue,
00:39
rigid group locks, the relative position of the selected components
00:43
and the components are treated as one single object when moved,
00:46
a rigid group is similar to a rigid joint.
00:49
But the main difference being with a rigid group,
00:51
you lock the origins of the components together with a regular rigid joint.
00:56
You have to reference features such as a face or an edge.
00:59
And this requires many more processes than simply creating a rigid group on its own.
01:03
However, in this tutorial,
01:05
we want to create some movement between some of the internal mechanisms of the saw.
01:09
So I'll click to undo the rigid group in the file menu
01:12
to begin the assembly modeling.
01:14
I'm going to convert the right side casing from a body to a component
01:19
in the browser. Right? Click on body 19,
01:21
then select create components from bodies.
01:25
Here's our new component, double click on the name and name it to right casing,
01:29
then press return on the keyboard.
01:32
So here's my new casing component on the model
01:34
and I can click and move it around.
01:37
I want to ground the casing.
01:39
So let's right. Click on right casing in the browser.
01:42
Then choose ground
01:44
the right casing is now grounded and fixed in position.
01:48
So I can now zoom into the mechanics
01:50
and begin to create some movement.
01:53
The reciprocating saw has been designed with a top down approach
01:56
and all the components and parts have been designed in
01:59
context with each other placed in the correct positions.
02:02
This makes assembly modeling the saw mechanics
02:05
much easier because we can use something in fusion
02:08
called as built joints to model all the mechanics,
02:12
abut
02:12
joints are similar to regular joints.
02:15
With the main difference being that as built
02:16
joints maintain the current position of the components.
02:20
So we can only use as built joints if
02:23
our components are already positioned in the correct locations
02:27
to create an as built joint from the toolbar, click assemble,
02:31
then choose as built joint.
02:33
I want to model the movement for this large spur gear
02:36
to rotate around the gear shaft in the center.
02:39
So in the dialogue,
02:41
I choose revolute for joint type,
02:43
I then select the spur gear
02:45
and the gear shaft. Now I need to choose the position for the revolute.
02:49
I'll click to choose this edge here on the gear shaft.
02:53
And fusion provides me with an animation preview of the movement
02:56
and I click OK to confirm the as built joint.
02:60
If I double click on the blue joint symbol,
03:03
I can use my mouse to drive the joint and we can see
03:06
the movement of the spur gear around the shaft is as we want it
03:09
as the spur gear rotates, it turns the crank arm
03:13
with a small rod connected to the spur gear.
03:16
Since the crank arm and the rod are in the correct positions,
03:20
we can use another as built joint to continue the assembly.
03:24
So let's do that and select as built joint from the assembly menu in the toolbar.
03:29
After driving my first joint, I've changed the position of the two components.
03:33
And fusion's asking me whether I want to keep the position that I've
03:36
changed or revert back to the original position of the two components.
03:40
In order to use the as built joint,
03:42
I need to ensure that the components are in the correct position.
03:45
So I won't capture the position of the components and
03:48
I'll click continue to revert back to the original position
03:51
to create the joint. I'll select the crank arm first, then the spur gear.
03:56
Again, our motion is revolute.
03:58
But this time we want the position of the movement here.
04:01
The preview confirms the movement so we can click. OK. In the dialogue
04:06
again, I can use my mouse to drive this joint.
04:08
But this time driving this joint drives both the abut joints in the assembly.
04:13
However, the crank arm isn't moving off the small rod
04:16
and nor is the small rod fixed to the spur wheel.
04:19
So we need to join these parts together
04:22
and we can create a rigid group to do this
04:24
because there's more than one component,
04:26
creating a rigid group is much quicker than creating individual rigid joints.
04:31
For each component
04:32
from the assemble menu.
04:34
Select rigid group, then select the components that you want to group.
04:38
Click the spur gear, join to the small rod,
04:42
the rod clip,
04:43
the small rod bushing
04:45
and then click OK to confirm the rigid group.
04:49
And now when we click to drive the joint,
04:52
all the components move with it
04:57
and we can continue moving our way up through the assembly,
04:60
applying joints and motion to the component parts where necessary.
05:04
And because fusion keeps everything in one single design,
05:07
we can move in and out of workspaces and environments whenever we like
05:11
making modifications to sketches, free form modeling,
05:14
parametric modeling,
05:16
direct modeling
05:17
and of course assembly modeling
05:19
and everything we do is recorded in the timeline.
05:22
So we can go back at any point in our design history
05:25
and make any edits that we need.
Video transcript
00:03
We can create joints and assembly model at any time in fusion.
00:06
But we only need to create joints if we require movement or if
00:11
we need to use the joint in the simulation environment in fusion,
00:14
if we don't require movement for our 3D models,
00:17
and we don't need to simulate working joints,
00:20
we can very quickly lock down our entire 3D model by creating a rigid group
00:25
to do this drag a selection window around the entire
00:28
model from right to left to select all the components
00:32
and from the tool bar. If we click assemble and then choose rigid group, then click.
00:37
OK. In the dialogue,
00:39
rigid group locks, the relative position of the selected components
00:43
and the components are treated as one single object when moved,
00:46
a rigid group is similar to a rigid joint.
00:49
But the main difference being with a rigid group,
00:51
you lock the origins of the components together with a regular rigid joint.
00:56
You have to reference features such as a face or an edge.
00:59
And this requires many more processes than simply creating a rigid group on its own.
01:03
However, in this tutorial,
01:05
we want to create some movement between some of the internal mechanisms of the saw.
01:09
So I'll click to undo the rigid group in the file menu
01:12
to begin the assembly modeling.
01:14
I'm going to convert the right side casing from a body to a component
01:19
in the browser. Right? Click on body 19,
01:21
then select create components from bodies.
01:25
Here's our new component, double click on the name and name it to right casing,
01:29
then press return on the keyboard.
01:32
So here's my new casing component on the model
01:34
and I can click and move it around.
01:37
I want to ground the casing.
01:39
So let's right. Click on right casing in the browser.
01:42
Then choose ground
01:44
the right casing is now grounded and fixed in position.
01:48
So I can now zoom into the mechanics
01:50
and begin to create some movement.
01:53
The reciprocating saw has been designed with a top down approach
01:56
and all the components and parts have been designed in
01:59
context with each other placed in the correct positions.
02:02
This makes assembly modeling the saw mechanics
02:05
much easier because we can use something in fusion
02:08
called as built joints to model all the mechanics,
02:12
abut
02:12
joints are similar to regular joints.
02:15
With the main difference being that as built
02:16
joints maintain the current position of the components.
02:20
So we can only use as built joints if
02:23
our components are already positioned in the correct locations
02:27
to create an as built joint from the toolbar, click assemble,
02:31
then choose as built joint.
02:33
I want to model the movement for this large spur gear
02:36
to rotate around the gear shaft in the center.
02:39
So in the dialogue,
02:41
I choose revolute for joint type,
02:43
I then select the spur gear
02:45
and the gear shaft. Now I need to choose the position for the revolute.
02:49
I'll click to choose this edge here on the gear shaft.
02:53
And fusion provides me with an animation preview of the movement
02:56
and I click OK to confirm the as built joint.
02:60
If I double click on the blue joint symbol,
03:03
I can use my mouse to drive the joint and we can see
03:06
the movement of the spur gear around the shaft is as we want it
03:09
as the spur gear rotates, it turns the crank arm
03:13
with a small rod connected to the spur gear.
03:16
Since the crank arm and the rod are in the correct positions,
03:20
we can use another as built joint to continue the assembly.
03:24
So let's do that and select as built joint from the assembly menu in the toolbar.
03:29
After driving my first joint, I've changed the position of the two components.
03:33
And fusion's asking me whether I want to keep the position that I've
03:36
changed or revert back to the original position of the two components.
03:40
In order to use the as built joint,
03:42
I need to ensure that the components are in the correct position.
03:45
So I won't capture the position of the components and
03:48
I'll click continue to revert back to the original position
03:51
to create the joint. I'll select the crank arm first, then the spur gear.
03:56
Again, our motion is revolute.
03:58
But this time we want the position of the movement here.
04:01
The preview confirms the movement so we can click. OK. In the dialogue
04:06
again, I can use my mouse to drive this joint.
04:08
But this time driving this joint drives both the abut joints in the assembly.
04:13
However, the crank arm isn't moving off the small rod
04:16
and nor is the small rod fixed to the spur wheel.
04:19
So we need to join these parts together
04:22
and we can create a rigid group to do this
04:24
because there's more than one component,
04:26
creating a rigid group is much quicker than creating individual rigid joints.
04:31
For each component
04:32
from the assemble menu.
04:34
Select rigid group, then select the components that you want to group.
04:38
Click the spur gear, join to the small rod,
04:42
the rod clip,
04:43
the small rod bushing
04:45
and then click OK to confirm the rigid group.
04:49
And now when we click to drive the joint,
04:52
all the components move with it
04:57
and we can continue moving our way up through the assembly,
04:60
applying joints and motion to the component parts where necessary.
05:04
And because fusion keeps everything in one single design,
05:07
we can move in and out of workspaces and environments whenever we like
05:11
making modifications to sketches, free form modeling,
05:14
parametric modeling,
05:16
direct modeling
05:17
and of course assembly modeling
05:19
and everything we do is recorded in the timeline.
05:22
So we can go back at any point in our design history
05:25
and make any edits that we need.
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