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Professional CAD/CAM tools built on Inventor and AutoCAD
Transcript
00:02
identify G. D. N. T. Symbols
00:06
in this video will identify G. D.
00:08
And T symbols and will plan coordinate system locations.
00:14
Infusion 3 60. Let's carry on with our 123 block drawing
00:19
first.
00:19
We're going to navigate to our second sheet and we want to be able to identify G. D.
00:24
And T. Or geometric dimension.
00:26
Ng and tolerance ng symbols that are located on detailed drawings.
00:30
Nearly all detailed drawings that are ready for
00:33
manufacturer will contain day Tums and G.
00:36
D. And T symbols to help identify critical areas of a design.
00:40
These might be things like positional tolerances,
00:43
perpendicular or parallel relationships between edges and faces.
00:47
Or it might simply just be to reference critical areas of the design.
00:52
This detailed drawing doesn't contain all G. T.
00:55
And T symbols but we're just going to identify what they look
00:57
like and make sure that you do study up on G.
00:60
D. And T.
01:01
So the first thing that we want to identify are going to be G. D. And T. Diatoms.
01:07
Diatoms are a critical way to identify certain features or
01:11
aspects of the design that may need additional tolerance NG.
01:15
A surface finish or they just need to be used as references.
01:18
So in this detailed drawing we have data a day to be and datum C.
01:25
You'll notice that data A.
01:27
Is pointing to the top face of the design which we can see in the top view data B.
01:33
Is pointing to the back face in the design which would be in the right view and datum C.
01:38
Is pointing to the left face and the design which
01:41
can be seen in the top and the front view
01:44
when we look at these data,
01:46
that helps us better understand where we
01:47
should think about our coordinate system locations.
01:50
When we're putting something in a machine to be machined.
01:53
So when we think about this data,
01:55
a means that this top face is going to be a critical
01:59
face and likely other features or details are going to reference it.
02:03
You might often see things like the holes having a
02:06
concentrate city with each other relative to a specific data.
02:11
But again, we don't have all day to symbols located on this detailed drawing.
02:15
So let's go ahead and take a look at a few
02:17
first we have what's called a control frame.
02:20
The control frame can contain a lot of different information.
02:23
And this is going to be a very basic one.
02:26
This control frame is pointing to a specific edge or line and in this case it's going
02:32
to be the center mark for this whole
02:34
we have a symbol which represents a positional tolerance
02:39
and this 0.2 is 2 10 thousands. Oftentimes referred to as two tents.
02:46
And you'll notice that it's referencing data be and datum.
02:50
See so this is telling me that the position of this hole
02:53
is critical relative to this back edge and the side edge.
02:58
If we take a look at another control frame,
03:00
we have a perpendicular symbol and again the same tolerance and it's referencing B.
03:06
So what it's telling me is that this face in the design
03:09
needs to be perpendicular to this back face as referenced by day.
03:13
To be
03:15
the last note that we have here is a parallel symbol.
03:18
The parallel symbol again has the same tolerance.
03:21
This is the typical tolerance you would find
03:23
on a 123 block and it's referencing data.
03:26
A.
03:26
So it's telling us that the bottom face of the design
03:30
needs to be parallel within this tolerance range of data.
03:33
A.
03:34
So identifying the different data on a detailed drawing as well as some of the G. D. N.
03:40
T symbols will help you understand critical aspects
03:43
of design to help you plan out how you're
03:45
going to hold the part and how you're going to machine it with a 123 block.
03:50
It's critical that all sides maintain perpendicular charity and parallelism.
03:56
So having a perpendicular and parallel face means you need to really think about how
04:01
it's going to be machined and what order of operations are going to be done.
04:05
Oftentimes this means that you're going to face the top face as well as face,
04:11
the side and the same operation to make
04:13
sure that you have a perpendicular relationship.
04:15
Then you can think about how you're going to hold
04:17
it and plan the other different faces to machine.
04:21
So at this point again,
04:22
we're just taking a basic look at identifying what
04:25
day Tums and control frames relative to G.
04:28
D. And T. Symbols look like Infusion 3 60 drawings as well as drawings in general.
04:33
We haven't made any changes but at this point it's a
04:35
good idea for you to go into the feature control frame,
04:39
apply it to just an edge of the drawing.
04:42
We're going to right click and continue.
04:44
And then you can take a look at
04:45
the different characteristics listed in the first frame.
04:49
You can see here that we have things like straightness, flatness, circularity,
04:53
cylinder, city profile of a line and so on.
04:56
So taking a look at these symbols and getting
04:58
a better idea of understanding what those symbols mean.
05:01
Can really help you also do note that symbols can be applied in different areas.
05:05
For example if I just double click on a note, we have symbols that can be applied here
05:11
and if we double click on a dimension.
05:13
For example if we go back to sheet one
05:16
and I double click on a dimension
05:18
outside of the dimension.
05:19
That's actually looking at the references that are selected.
05:22
You can add specific symbols in here for things like diameter.
05:26
Centerline position, counter bore depth and so on.
05:31
So keep in mind there are a lot of different
05:33
symbols that you might see on a detailed drawing.
05:35
So getting familiar with those is going to
05:37
be an important aspect of planning out your projects
05:40
at this point. Let's go ahead and move on to the next step
Video transcript
00:02
identify G. D. N. T. Symbols
00:06
in this video will identify G. D.
00:08
And T symbols and will plan coordinate system locations.
00:14
Infusion 3 60. Let's carry on with our 123 block drawing
00:19
first.
00:19
We're going to navigate to our second sheet and we want to be able to identify G. D.
00:24
And T. Or geometric dimension.
00:26
Ng and tolerance ng symbols that are located on detailed drawings.
00:30
Nearly all detailed drawings that are ready for
00:33
manufacturer will contain day Tums and G.
00:36
D. And T symbols to help identify critical areas of a design.
00:40
These might be things like positional tolerances,
00:43
perpendicular or parallel relationships between edges and faces.
00:47
Or it might simply just be to reference critical areas of the design.
00:52
This detailed drawing doesn't contain all G. T.
00:55
And T symbols but we're just going to identify what they look
00:57
like and make sure that you do study up on G.
00:60
D. And T.
01:01
So the first thing that we want to identify are going to be G. D. And T. Diatoms.
01:07
Diatoms are a critical way to identify certain features or
01:11
aspects of the design that may need additional tolerance NG.
01:15
A surface finish or they just need to be used as references.
01:18
So in this detailed drawing we have data a day to be and datum C.
01:25
You'll notice that data A.
01:27
Is pointing to the top face of the design which we can see in the top view data B.
01:33
Is pointing to the back face in the design which would be in the right view and datum C.
01:38
Is pointing to the left face and the design which
01:41
can be seen in the top and the front view
01:44
when we look at these data,
01:46
that helps us better understand where we
01:47
should think about our coordinate system locations.
01:50
When we're putting something in a machine to be machined.
01:53
So when we think about this data,
01:55
a means that this top face is going to be a critical
01:59
face and likely other features or details are going to reference it.
02:03
You might often see things like the holes having a
02:06
concentrate city with each other relative to a specific data.
02:11
But again, we don't have all day to symbols located on this detailed drawing.
02:15
So let's go ahead and take a look at a few
02:17
first we have what's called a control frame.
02:20
The control frame can contain a lot of different information.
02:23
And this is going to be a very basic one.
02:26
This control frame is pointing to a specific edge or line and in this case it's going
02:32
to be the center mark for this whole
02:34
we have a symbol which represents a positional tolerance
02:39
and this 0.2 is 2 10 thousands. Oftentimes referred to as two tents.
02:46
And you'll notice that it's referencing data be and datum.
02:50
See so this is telling me that the position of this hole
02:53
is critical relative to this back edge and the side edge.
02:58
If we take a look at another control frame,
03:00
we have a perpendicular symbol and again the same tolerance and it's referencing B.
03:06
So what it's telling me is that this face in the design
03:09
needs to be perpendicular to this back face as referenced by day.
03:13
To be
03:15
the last note that we have here is a parallel symbol.
03:18
The parallel symbol again has the same tolerance.
03:21
This is the typical tolerance you would find
03:23
on a 123 block and it's referencing data.
03:26
A.
03:26
So it's telling us that the bottom face of the design
03:30
needs to be parallel within this tolerance range of data.
03:33
A.
03:34
So identifying the different data on a detailed drawing as well as some of the G. D. N.
03:40
T symbols will help you understand critical aspects
03:43
of design to help you plan out how you're
03:45
going to hold the part and how you're going to machine it with a 123 block.
03:50
It's critical that all sides maintain perpendicular charity and parallelism.
03:56
So having a perpendicular and parallel face means you need to really think about how
04:01
it's going to be machined and what order of operations are going to be done.
04:05
Oftentimes this means that you're going to face the top face as well as face,
04:11
the side and the same operation to make
04:13
sure that you have a perpendicular relationship.
04:15
Then you can think about how you're going to hold
04:17
it and plan the other different faces to machine.
04:21
So at this point again,
04:22
we're just taking a basic look at identifying what
04:25
day Tums and control frames relative to G.
04:28
D. And T. Symbols look like Infusion 3 60 drawings as well as drawings in general.
04:33
We haven't made any changes but at this point it's a
04:35
good idea for you to go into the feature control frame,
04:39
apply it to just an edge of the drawing.
04:42
We're going to right click and continue.
04:44
And then you can take a look at
04:45
the different characteristics listed in the first frame.
04:49
You can see here that we have things like straightness, flatness, circularity,
04:53
cylinder, city profile of a line and so on.
04:56
So taking a look at these symbols and getting
04:58
a better idea of understanding what those symbols mean.
05:01
Can really help you also do note that symbols can be applied in different areas.
05:05
For example if I just double click on a note, we have symbols that can be applied here
05:11
and if we double click on a dimension.
05:13
For example if we go back to sheet one
05:16
and I double click on a dimension
05:18
outside of the dimension.
05:19
That's actually looking at the references that are selected.
05:22
You can add specific symbols in here for things like diameter.
05:26
Centerline position, counter bore depth and so on.
05:31
So keep in mind there are a lot of different
05:33
symbols that you might see on a detailed drawing.
05:35
So getting familiar with those is going to
05:37
be an important aspect of planning out your projects
05:40
at this point. Let's go ahead and move on to the next step
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