Any referenced datasets can be downloaded from "Module downloads" in the module overview.
Transcript
00:02
Create draft as a feature.
00:06
In this video, we'll use Draft on a body and use Split Face.
00:11
In Fusion 360, we want to carry on with our drafted spur gear.
00:16
At this point we've modified the original extrude features to include a draft or taper angle.
00:22
We know that the side faces of the gears or the teeth themselves are drafted minus half a degree.
00:30
When we take a look at the rest of the design, we have to be mindful of its intent.
00:35
In this case, we need to preserve the round shafts as they're going to be used inside of a bearing surface.
00:40
So keeping that in mind, we can't simply add draft and taper it toward the Z direction.
00:47
Because that means that the bearing that gets pressed on here is likely only going to have a single point of contact.
00:53
So in this case, we're actually going to be drafting it in the Y direction.
00:57
The first thing that we want to do is go to Modify and select Split Face.
01:03
When we look at split, we have three different options.
01:05
And in this case, we're simply going to divide the faces of the areas that we want to draft.
01:10
And we don't want to divide the body itself.
01:13
By using Split Face, we need to pick the faces that we want to split.
01:17
And in this case, I'm going to select all of the different faces that are included in the areas that we're concerned about.
01:25
So this will be all the way up to the top.
01:27
And once I'm happy with those, I'm also going to select the top face of the gear and then I need to select my splitting tool.
01:35
For me, that's going to be the XZ plane.
01:38
So I'm going to go in and select XZ and say, OK.
01:43
This is still a single solid body, but now we've divided it up so we have better selection for applying that draft.
01:50
We're going to go to Modify and select the Draft tool and then we can begin by first determining what type.
01:56
A fixed plane or a parting line.
01:59
The parting line option is great in certain instances,
02:02
but for our case we don't want to use parting line because we're going to be focusing on one side of the split and then the other.
02:09
In some cases if you want to include that split or the parting line,
02:13
you can use a sketch to help determine where the part is going to be split and then draft on either side of it.
02:19
It’s a little bit more of an advanced technique so we're going to focus our attention on using the fixed plane method.
02:25
The poll direction is going to be our XZ plane.
02:29
So I'm going to hold down the left mouse button and select XZ.
02:33
Notice that it's showing an arrow for the pull direction and if we need to we can flip.
02:38
I am going to turn off tangent chain because we still have tangency even though we split the faces.
02:44
So we want to make sure that we deselect that as an option.
02:48
Now we can go around and select all the faces that we want to draft.
02:52
When we do this, notice that it lets me select the first face but it's not allowing me to select the side face here.
02:60
It's only allowing me to select these top faces.
03:04
For the angle let's enter G and use gear draft and see how this affects the model.
03:11
Sometimes it might be hard to tell so we can artificially use a larger value to ensure that we are actually drafting in the direction we want.
03:20
When we add 10 degrees, we can see that we are adding quite a bit of draft so we can go back and use gear draft which is half a degree.
03:28
And we're going to have it draft on one side.
03:31
We'll say OK and now we've applied that draft.
03:34
If we look at it from the right hand side, notice that it's actually drafting up to that line and moving away at half a degree.
03:42
We're going to repeat the process using our right click marking menu.
03:46
This time, the pull direction will be the same.
03:48
So I'm going to select that XZ plane.
03:51
And for the faces, we're gonna use the faces on the other side of our selection.
03:58
If you need to, you might want to hold down the control or command key to make sure that you are selecting all the faces.
04:04
It remembers our half degree selection but we want to use that gear draft parameter in case we need to make any changes later.
04:11
We'll say, OK and take a look at this from the right side.
04:15
While it doesn't necessarily appear like we have enough draft, let's verify this by using Inspect and creating another draft analysis.
04:23
We use the same body selection but for our plane we need to use XZ.
04:29
We're gonna take a look at it from 0.4, positive 0.45 and negative 0.45.
04:37
Remember we are using half a degree and we're going to not use anything in the tolerance zone.
04:42
If we have any difficulty setting these values, you can always reset them to zero,
04:47
and then you can use the slider or you can use the up down arrows to get us closer.
04:53
Once again, I'm going to alter these to 0.45 so I have complete colorization.
04:59
If I were to reverse the direction or take a look at some areas of concern, you can see that right in the middle, there is a small red area.
05:08
Now, often times when we apply draft to a model, what we're really doing is we're giving it away to self-eject from a mold.
05:16
As the plastic cools and begins to expand,
05:19
we wanted to automatically eject itself from the mold rather than get sucked into the mold and not be removable.
05:26
When we're talking about a shaft where we have a rounded section coming directly up to the parting line,
05:32
the majority of that shaft has plenty of draft on it.
05:36
But right at the middle or right at the parting line often times you will have a slight problem.
05:42
You can get around this in most cases by talking to the manufacturer and seeing if they can actually draft,
05:48
or use a part that's undrafted around the round section.
05:52
If they need a draft, we can always put a small flat section there and still have the functionality needed to actually support the bearing.
05:60
In our case, everything looks pretty good.
06:02
So I'm going to say OK and just verify that I have applied the draft to all the areas.
06:09
We go to our Analysis folder and take a look at the first draft.
06:12
You can see that we still have areas of concern underneath.
06:15
So we can use Modify, Draft, select the type, the pull direction and the faces.
06:22
In our case the pull direction is going to be Z.
06:24
So the plane that we're going to select is XY.
06:28
The faces that we want to draft are going to be any of these side faces,
06:32
and it looks like there is a small amount of green and red that's displaying on the side here.
06:38
So let's make sure that we select that small face as well.
06:41
And then the draft that we're gonna want to use is that gear draft value and we’ll say OK.
06:48
If those are showing up green now instead of red, that means that we have enough draft.
06:53
So everything looks to be okay.
06:55
You can always validate this by going to a bottom view and seeing if you can actually see that face.
07:01
Well, right now we can't see that face, which means that the draft is actually in the wrong direction.
07:07
If we modify this and we flip the pole direction and we say OK, now we can see those faces.
07:13
If we turn on the draft analysis and we rotate this around, the faces are now blue instead of green.
07:19
So even though at first they appeared to be okay because of that green color.
07:23
It is important that we do verify that before we simply send the model off.
07:28
Let's minimize all the folders and go back to a home view.
07:31
And at this point, let's make sure that we save the design before moving on.
00:02
Create draft as a feature.
00:06
In this video, we'll use Draft on a body and use Split Face.
00:11
In Fusion 360, we want to carry on with our drafted spur gear.
00:16
At this point we've modified the original extrude features to include a draft or taper angle.
00:22
We know that the side faces of the gears or the teeth themselves are drafted minus half a degree.
00:30
When we take a look at the rest of the design, we have to be mindful of its intent.
00:35
In this case, we need to preserve the round shafts as they're going to be used inside of a bearing surface.
00:40
So keeping that in mind, we can't simply add draft and taper it toward the Z direction.
00:47
Because that means that the bearing that gets pressed on here is likely only going to have a single point of contact.
00:53
So in this case, we're actually going to be drafting it in the Y direction.
00:57
The first thing that we want to do is go to Modify and select Split Face.
01:03
When we look at split, we have three different options.
01:05
And in this case, we're simply going to divide the faces of the areas that we want to draft.
01:10
And we don't want to divide the body itself.
01:13
By using Split Face, we need to pick the faces that we want to split.
01:17
And in this case, I'm going to select all of the different faces that are included in the areas that we're concerned about.
01:25
So this will be all the way up to the top.
01:27
And once I'm happy with those, I'm also going to select the top face of the gear and then I need to select my splitting tool.
01:35
For me, that's going to be the XZ plane.
01:38
So I'm going to go in and select XZ and say, OK.
01:43
This is still a single solid body, but now we've divided it up so we have better selection for applying that draft.
01:50
We're going to go to Modify and select the Draft tool and then we can begin by first determining what type.
01:56
A fixed plane or a parting line.
01:59
The parting line option is great in certain instances,
02:02
but for our case we don't want to use parting line because we're going to be focusing on one side of the split and then the other.
02:09
In some cases if you want to include that split or the parting line,
02:13
you can use a sketch to help determine where the part is going to be split and then draft on either side of it.
02:19
It’s a little bit more of an advanced technique so we're going to focus our attention on using the fixed plane method.
02:25
The poll direction is going to be our XZ plane.
02:29
So I'm going to hold down the left mouse button and select XZ.
02:33
Notice that it's showing an arrow for the pull direction and if we need to we can flip.
02:38
I am going to turn off tangent chain because we still have tangency even though we split the faces.
02:44
So we want to make sure that we deselect that as an option.
02:48
Now we can go around and select all the faces that we want to draft.
02:52
When we do this, notice that it lets me select the first face but it's not allowing me to select the side face here.
02:60
It's only allowing me to select these top faces.
03:04
For the angle let's enter G and use gear draft and see how this affects the model.
03:11
Sometimes it might be hard to tell so we can artificially use a larger value to ensure that we are actually drafting in the direction we want.
03:20
When we add 10 degrees, we can see that we are adding quite a bit of draft so we can go back and use gear draft which is half a degree.
03:28
And we're going to have it draft on one side.
03:31
We'll say OK and now we've applied that draft.
03:34
If we look at it from the right hand side, notice that it's actually drafting up to that line and moving away at half a degree.
03:42
We're going to repeat the process using our right click marking menu.
03:46
This time, the pull direction will be the same.
03:48
So I'm going to select that XZ plane.
03:51
And for the faces, we're gonna use the faces on the other side of our selection.
03:58
If you need to, you might want to hold down the control or command key to make sure that you are selecting all the faces.
04:04
It remembers our half degree selection but we want to use that gear draft parameter in case we need to make any changes later.
04:11
We'll say, OK and take a look at this from the right side.
04:15
While it doesn't necessarily appear like we have enough draft, let's verify this by using Inspect and creating another draft analysis.
04:23
We use the same body selection but for our plane we need to use XZ.
04:29
We're gonna take a look at it from 0.4, positive 0.45 and negative 0.45.
04:37
Remember we are using half a degree and we're going to not use anything in the tolerance zone.
04:42
If we have any difficulty setting these values, you can always reset them to zero,
04:47
and then you can use the slider or you can use the up down arrows to get us closer.
04:53
Once again, I'm going to alter these to 0.45 so I have complete colorization.
04:59
If I were to reverse the direction or take a look at some areas of concern, you can see that right in the middle, there is a small red area.
05:08
Now, often times when we apply draft to a model, what we're really doing is we're giving it away to self-eject from a mold.
05:16
As the plastic cools and begins to expand,
05:19
we wanted to automatically eject itself from the mold rather than get sucked into the mold and not be removable.
05:26
When we're talking about a shaft where we have a rounded section coming directly up to the parting line,
05:32
the majority of that shaft has plenty of draft on it.
05:36
But right at the middle or right at the parting line often times you will have a slight problem.
05:42
You can get around this in most cases by talking to the manufacturer and seeing if they can actually draft,
05:48
or use a part that's undrafted around the round section.
05:52
If they need a draft, we can always put a small flat section there and still have the functionality needed to actually support the bearing.
05:60
In our case, everything looks pretty good.
06:02
So I'm going to say OK and just verify that I have applied the draft to all the areas.
06:09
We go to our Analysis folder and take a look at the first draft.
06:12
You can see that we still have areas of concern underneath.
06:15
So we can use Modify, Draft, select the type, the pull direction and the faces.
06:22
In our case the pull direction is going to be Z.
06:24
So the plane that we're going to select is XY.
06:28
The faces that we want to draft are going to be any of these side faces,
06:32
and it looks like there is a small amount of green and red that's displaying on the side here.
06:38
So let's make sure that we select that small face as well.
06:41
And then the draft that we're gonna want to use is that gear draft value and we’ll say OK.
06:48
If those are showing up green now instead of red, that means that we have enough draft.
06:53
So everything looks to be okay.
06:55
You can always validate this by going to a bottom view and seeing if you can actually see that face.
07:01
Well, right now we can't see that face, which means that the draft is actually in the wrong direction.
07:07
If we modify this and we flip the pole direction and we say OK, now we can see those faces.
07:13
If we turn on the draft analysis and we rotate this around, the faces are now blue instead of green.
07:19
So even though at first they appeared to be okay because of that green color.
07:23
It is important that we do verify that before we simply send the model off.
07:28
Let's minimize all the folders and go back to a home view.
07:31
And at this point, let's make sure that we save the design before moving on.
Step-by-step guide
