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Transcript
00:02
Analyze draft on a design.
00:05
In this video, we'll use Draft Analysis, Accessibility Analysis and Minimum Radius Analysis.
00:13
In Fusion 360, we want to get started with the supplied dataset drafted spur gear - analyze.
00:19
This spur gear has already been drafted and it has a few other components in it.
00:25
We expand the mold, you'll notice that there are three bodies, Side B, Side A1 and Side A2.
00:32
Creating a mold core and cavity for your plastic molded parts can oftentimes be an extremely important step
00:39
to better understand how the parts are going to be manufactured.
00:43
So let's take a look at the Analyze and Inspect tools that we have to make sure that this part can actually be produced.
00:50
To get started, I'm going to hide Side B and Side A1 and I'm also going to hide the spur gear.
00:57
I’m going to change the opacity of Side A2 by right clicking, going to Opacity Control and setting it back to 100%.
01:05
You'll notice that when I do this, the entire thing is still transparent and that's because it's also set at the mold level.
01:11
We want to make sure that we go to the top level and set the opacity of the entire component back to 100%.
01:18
Next we're going to use Inspect and Draft Analysis.
01:23
We're going to select this body and for the direction, we’ll simply use the pull direction associated with this outside face.
01:30
When we do this, we need to make sure that we're looking at the appropriate amount of draft.
01:35
Right now it was going from 0.4 degrees to 0.5 degrees.
01:41
But we need to set this back to zero and then we'll use the up and down arrows to set it to minus 5 degrees and positive 5 degrees.
01:49
When we look at this, you'll note that everything appears to be okay.
01:53
But we're seeing red on these flat faces.
01:56
If we instead change this to 0.45 and positive 0.45, you can see that everything is now green, meaning that we have plenty of draft.
02:07
I'm going to okay the analysis, hide Side A1 and bring back Side A2.
02:13
This wasn't included in the original analysis but we can always edit.
02:18
And for the body, we can select that body as well and then we can show everything is blue on this specific body.
02:26
Next let's hide A1 and let's show Side B.
02:31
This one will require another draft analysis.
02:34
So let's hide Draft1.
02:35
And let's take a look at going to Inspect and creating a new draft analysis.
02:41
We’ll select this as our body and the direction is going to be the top face of the part.
02:46
And once again, we're going to make sure that we set this to minus 0.45 and we're going to set it to positive 0.45.
02:56
When we do that, you'll notice that everything does turn green.
02:59
However, we are seeing some red faces here.
03:02
This is telling us that we don't have enough draft in these areas.
03:05
What we should be seeing is all green or blue and you'll notice that we are getting some red areas.
03:12
If we reduce this number to 0.4 and to positive 0.4 and take a look at the change, hopefully we'll see some changes in the gear,
03:22
but you'll notice that we still have this red color.
03:26
If we want to, we can reduce these values even further to get a better idea as to the range that we're going between.
03:35
We also might need to change things like the direction that we're pulling, noting that what we're doing here is we've selected this face.
03:43
And if you remember how we produce this originally, that face is already tapered.
03:48
So this is actually producing a bad result simply based on our selection.
03:52
So we're going to change the direction selection and make sure that we use this top center face.
03:58
We know that we didn't draft that to either side in the Y direction and now everything looks to be green or blue.
04:06
So this tells me that this is a much better situation.
04:09
However, this area is drafted in the opposite direction from the inside of the teeth.
04:16
So that could be problematic, especially since in this case it looks like it's going to lock itself into the mold.
04:22
That tells me that I need to make some modifications to the original geometry.
04:27
I'm going to OK the analysis, I'm going to keep it on the screen but I'm going to make some changes to those features.
04:34
If I take a look and take a look at the features that I have, I have a draft that's applied to the inside faces.
04:42
I'm going to right click and edit that feature.
04:45
And instead of minus gear draft, I'm going to set it to positive and say, OK.
04:51
I want to make sure that I hide the gear and now I take a look at the results and all of these faces are now green.
04:57
That tells me that during the design phase, it was drafted the wrong direction.
05:02
This is an important consideration because that means that the part would not be able to be removed from the mold.
05:08
This is something a mold house would likely figure out,
05:11
but it's always important to provide them the best model possible and that will reduce any sorts of delays in production.
05:19
It is also important to note that there are multiple ways to produce this geometry.
05:24
We could take a look at Inspect and look at things like Accessibility Analysis or Minimum Radius Analysis.
05:32
This will tell us whether or not tools can actually get into this geometry.
05:37
For Accessibility Analysis, everything looks fine.
05:40
So I'm going to cancel and not save that analysis type.
05:43
I'm going to hide draft, go to Inspect and I'm going to take a look at the Minimum Radius Analysis.
05:49
When I do this, it's showing me that the minimum radius is zero, the maximum tool radius is 25 and it shows me the optimal is 0.77.
06:00
If I reduce this value to say 1 millimeter, what that's actually doing is it's changing the range on the slider between 0 and 1.
06:10
What this tells us is that we have a lot of sharp edges on this design.
06:14
Turning the sharp edges option on, you can see that we have vertical edges,
06:18
which will not be able to be produced through conventional machining operations.
06:22
Sometimes geometry like this would be produced with things like spark erosion.
06:28
There would be an EDM machine that had a custom shaped electrode that could remove the material for this geometry.
06:34
Another option would be to modify the design so that there was a fillet on those corners and we could get a small tool in there.
06:41
So again, it's important to keep in mind that the manufacturing of these parts is just as critical as the design,
06:48
because you could make an extremely well thought out design.
06:51
But if you can't produce it, then you're going to have to make changes anyways.
06:55
So at this point, let's make sure that we save this design before we move on.
Video transcript
00:02
Analyze draft on a design.
00:05
In this video, we'll use Draft Analysis, Accessibility Analysis and Minimum Radius Analysis.
00:13
In Fusion 360, we want to get started with the supplied dataset drafted spur gear - analyze.
00:19
This spur gear has already been drafted and it has a few other components in it.
00:25
We expand the mold, you'll notice that there are three bodies, Side B, Side A1 and Side A2.
00:32
Creating a mold core and cavity for your plastic molded parts can oftentimes be an extremely important step
00:39
to better understand how the parts are going to be manufactured.
00:43
So let's take a look at the Analyze and Inspect tools that we have to make sure that this part can actually be produced.
00:50
To get started, I'm going to hide Side B and Side A1 and I'm also going to hide the spur gear.
00:57
I’m going to change the opacity of Side A2 by right clicking, going to Opacity Control and setting it back to 100%.
01:05
You'll notice that when I do this, the entire thing is still transparent and that's because it's also set at the mold level.
01:11
We want to make sure that we go to the top level and set the opacity of the entire component back to 100%.
01:18
Next we're going to use Inspect and Draft Analysis.
01:23
We're going to select this body and for the direction, we’ll simply use the pull direction associated with this outside face.
01:30
When we do this, we need to make sure that we're looking at the appropriate amount of draft.
01:35
Right now it was going from 0.4 degrees to 0.5 degrees.
01:41
But we need to set this back to zero and then we'll use the up and down arrows to set it to minus 5 degrees and positive 5 degrees.
01:49
When we look at this, you'll note that everything appears to be okay.
01:53
But we're seeing red on these flat faces.
01:56
If we instead change this to 0.45 and positive 0.45, you can see that everything is now green, meaning that we have plenty of draft.
02:07
I'm going to okay the analysis, hide Side A1 and bring back Side A2.
02:13
This wasn't included in the original analysis but we can always edit.
02:18
And for the body, we can select that body as well and then we can show everything is blue on this specific body.
02:26
Next let's hide A1 and let's show Side B.
02:31
This one will require another draft analysis.
02:34
So let's hide Draft1.
02:35
And let's take a look at going to Inspect and creating a new draft analysis.
02:41
We’ll select this as our body and the direction is going to be the top face of the part.
02:46
And once again, we're going to make sure that we set this to minus 0.45 and we're going to set it to positive 0.45.
02:56
When we do that, you'll notice that everything does turn green.
02:59
However, we are seeing some red faces here.
03:02
This is telling us that we don't have enough draft in these areas.
03:05
What we should be seeing is all green or blue and you'll notice that we are getting some red areas.
03:12
If we reduce this number to 0.4 and to positive 0.4 and take a look at the change, hopefully we'll see some changes in the gear,
03:22
but you'll notice that we still have this red color.
03:26
If we want to, we can reduce these values even further to get a better idea as to the range that we're going between.
03:35
We also might need to change things like the direction that we're pulling, noting that what we're doing here is we've selected this face.
03:43
And if you remember how we produce this originally, that face is already tapered.
03:48
So this is actually producing a bad result simply based on our selection.
03:52
So we're going to change the direction selection and make sure that we use this top center face.
03:58
We know that we didn't draft that to either side in the Y direction and now everything looks to be green or blue.
04:06
So this tells me that this is a much better situation.
04:09
However, this area is drafted in the opposite direction from the inside of the teeth.
04:16
So that could be problematic, especially since in this case it looks like it's going to lock itself into the mold.
04:22
That tells me that I need to make some modifications to the original geometry.
04:27
I'm going to OK the analysis, I'm going to keep it on the screen but I'm going to make some changes to those features.
04:34
If I take a look and take a look at the features that I have, I have a draft that's applied to the inside faces.
04:42
I'm going to right click and edit that feature.
04:45
And instead of minus gear draft, I'm going to set it to positive and say, OK.
04:51
I want to make sure that I hide the gear and now I take a look at the results and all of these faces are now green.
04:57
That tells me that during the design phase, it was drafted the wrong direction.
05:02
This is an important consideration because that means that the part would not be able to be removed from the mold.
05:08
This is something a mold house would likely figure out,
05:11
but it's always important to provide them the best model possible and that will reduce any sorts of delays in production.
05:19
It is also important to note that there are multiple ways to produce this geometry.
05:24
We could take a look at Inspect and look at things like Accessibility Analysis or Minimum Radius Analysis.
05:32
This will tell us whether or not tools can actually get into this geometry.
05:37
For Accessibility Analysis, everything looks fine.
05:40
So I'm going to cancel and not save that analysis type.
05:43
I'm going to hide draft, go to Inspect and I'm going to take a look at the Minimum Radius Analysis.
05:49
When I do this, it's showing me that the minimum radius is zero, the maximum tool radius is 25 and it shows me the optimal is 0.77.
06:00
If I reduce this value to say 1 millimeter, what that's actually doing is it's changing the range on the slider between 0 and 1.
06:10
What this tells us is that we have a lot of sharp edges on this design.
06:14
Turning the sharp edges option on, you can see that we have vertical edges,
06:18
which will not be able to be produced through conventional machining operations.
06:22
Sometimes geometry like this would be produced with things like spark erosion.
06:28
There would be an EDM machine that had a custom shaped electrode that could remove the material for this geometry.
06:34
Another option would be to modify the design so that there was a fillet on those corners and we could get a small tool in there.
06:41
So again, it's important to keep in mind that the manufacturing of these parts is just as critical as the design,
06:48
because you could make an extremely well thought out design.
06:51
But if you can't produce it, then you're going to have to make changes anyways.
06:55
So at this point, let's make sure that we save this design before we move on.
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