Practice exercise

In this exercise you'll practice how to create a parametric sketch, create an extrude, use Fillet, and use Shell. 

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Exercise

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00:01

This is a practice exercise video solution

00:05

for this practice exercise.

00:07

Let's get started with the supply data set, trigger lock dot F three D,

00:10

we're going to be recreating the trigger lock on the reciprocating saw.

00:14

So let's get started by creating a new sketch and we'll select our right plane.

00:20

I'm going to zoom in

00:21

and I'm going to use my line tool to get started.

00:24

I want to create a line

00:27

and try to build out this shape.

00:30

Remember we're using a sketch canvas so we're not going to be able to

00:33

get it exactly correct but we want to get it as close as possible.

00:38

Once you're happy with the orientation, I'm going to go back and use the Philip tool

00:42

to apply rounded corners to each of these edges.

00:46

I want to be mindful of the radius value because

00:49

I am going to use a shell feature later.

00:51

I want to make sure that I can thin this down to at least 1.5 millimeters.

00:55

Once we're happy with that we can right click and say okay on the

00:60

next we want to make sure that we do dimension this.

01:02

So I'm going to add a horizontal and a vertical line.

01:07

And these are going to be references for me.

01:10

I also want to make sure that these are going to

01:12

be construction by selecting them and hitting X on the keyboard.

01:16

Now that I have these references,

01:17

I can use these to add an angle dimension and location dimensions.

01:22

So using the dimension tool, let's get started by first dimension.

01:25

In the angle here,

01:27

this is gonna be 14°.

01:29

Once we have one of the angles determined,

01:31

we can use the angles between internal edges in this case will say 60°

01:37

Between this bottom edge, we're going to say 108°.

01:42

And between these two edges

01:44

we're going to say 58°.

01:47

Now that we have those, we need to positively locate one of the corners.

01:50

I'm going to select the center point of this film

01:53

and my horizontal reference line to give it a vertical dimension of 47.25 mm.

01:59

Next I want to select that same point

02:01

and go all the way to my origin.

02:04

I'm gonna give it a horizontal distance of 130.25 mm

02:09

from here. I'm going to dimension to the center point of each of these filets.

02:13

This is going to be 2 mm

02:16

And then we'll add a dimension from that point back here,

02:19

horizontal dimension will be 15.5

02:22

and you can see now we have a fully defined sketch.

02:25

Let's go ahead and finish the sketch and extrude this into three D.

02:29

I'm gonna go ahead and use extrude and I'm

02:31

going to pull this outward a distance of eight

02:34

because I know this is a molded plastic part. I'm also gonna add one degree of draft

02:39

depending on the direction you're extruding. This may need to be a negative value.

02:44

Once we have the negative value,

02:45

I'm going to use my modify and fill a tool to add a rounded corner on the outside.

02:51

I want to add a thickness value of two,

02:53

which matches the radius that we had on the corners.

02:57

Next we can add a little bit more detail. If we want to add some of the recesses,

03:01

we don't have to exactly match the underlying image,

03:03

but we can right click on this face and create a new sketch

03:06

and we can just add some slots to add a little bit more shape.

03:10

So we'll select the slot tool,

03:12

we'll do a center to center slot

03:14

and I'm simply going to add a small slot here

03:18

and I'll add another one next to it and then

03:20

we'll come back and we'll dimension these in a minute

03:22

and I'll add one more just for a little bit of texture.

03:26

Some of the constraints have automatically been applied.

03:29

You can see there are parallel constraints between some of the edges and centers.

03:33

Now we want to make sure that the radius value of all three are the equal.

03:37

And I'm going to add a constraint for these bottom edges but

03:42

I want to add a line that goes between all of them.

03:44

So I'm going to add a line here and another line here.

03:48

I want to turn these into construction by selecting them hitting X on the keyboard

03:52

and then I also want to make them co linear with each other.

03:56

Then we can make one of these lines parallel with the bottom edge

03:60

escape to get off our constraint tool.

04:02

Go ahead and pull this down

04:03

and we can manipulate the tops.

04:06

If you get into a situation where the slots start to get deformed,

04:11

let's go ahead and do undo and start to apply some dimensions.

04:15

We'll add a dimension between these points

04:18

given

04:20

and we'll do the same thing over here.

04:23

I'm going to select the original 2.5 to link them together

04:26

And now I want to determine its distance from this corner.

04:30

I'm also going to make this 2.5 mm.

04:34

Now we need a radius value.

04:36

This is gonna be .75

04:39

and then we can determine the heights

04:43

For this. I'm going to say 3.5 mm for the back one.

04:48

We're gonna give this one a three millimeter height and

04:51

we're going to give this one a 2.5 millimeter height.

04:56

Next we'll dimension the distance between these parallel edges at .75,

05:01

you can see this is still not fully dimension.

05:04

We're gonna hit escape on the keyboard.

05:05

And as we begin to try to drag things around,

05:08

you'll notice that the angle is not fixed yet.

05:10

So we'll take one of these center lines,

05:12

we'll take the side line and we'll go ahead and make this parallel.

05:17

We'll finish the sketch, we use E to extrude

05:21

And we'll go ahead and remove a small amount of material

05:24

once again because these are injection molded parts,

05:27

we're going to go ahead and use a -1° draft

05:29

to make sure that we have draft on these features.

05:32

The last thing that we're going to do is hide

05:34

the canvas and we're going to shell the backside.

05:38

I'm going to use a 1.5 millimeter value and you'll notice that the operation failed,

05:43

partially failed because of these features.

05:45

If this ever happens, we can cancel out,

05:48

we can roll back the timeline before the extrude before

05:51

we add those details and then try the shell again

05:54

once more. Let's try 1.5 millimeters and you can see that it is able to be generated.

05:59

Will say, okay,

06:01

and then we'll roll the feature back to the end of the timeline.

06:05

Now we've used the canvas image and we've

06:07

created a rough approximation of the trigger lock

06:10

at this point. Let's go ahead and save the design before moving on.

Video transcript

00:01

This is a practice exercise video solution

00:05

for this practice exercise.

00:07

Let's get started with the supply data set, trigger lock dot F three D,

00:10

we're going to be recreating the trigger lock on the reciprocating saw.

00:14

So let's get started by creating a new sketch and we'll select our right plane.

00:20

I'm going to zoom in

00:21

and I'm going to use my line tool to get started.

00:24

I want to create a line

00:27

and try to build out this shape.

00:30

Remember we're using a sketch canvas so we're not going to be able to

00:33

get it exactly correct but we want to get it as close as possible.

00:38

Once you're happy with the orientation, I'm going to go back and use the Philip tool

00:42

to apply rounded corners to each of these edges.

00:46

I want to be mindful of the radius value because

00:49

I am going to use a shell feature later.

00:51

I want to make sure that I can thin this down to at least 1.5 millimeters.

00:55

Once we're happy with that we can right click and say okay on the

00:60

next we want to make sure that we do dimension this.

01:02

So I'm going to add a horizontal and a vertical line.

01:07

And these are going to be references for me.

01:10

I also want to make sure that these are going to

01:12

be construction by selecting them and hitting X on the keyboard.

01:16

Now that I have these references,

01:17

I can use these to add an angle dimension and location dimensions.

01:22

So using the dimension tool, let's get started by first dimension.

01:25

In the angle here,

01:27

this is gonna be 14°.

01:29

Once we have one of the angles determined,

01:31

we can use the angles between internal edges in this case will say 60°

01:37

Between this bottom edge, we're going to say 108°.

01:42

And between these two edges

01:44

we're going to say 58°.

01:47

Now that we have those, we need to positively locate one of the corners.

01:50

I'm going to select the center point of this film

01:53

and my horizontal reference line to give it a vertical dimension of 47.25 mm.

01:59

Next I want to select that same point

02:01

and go all the way to my origin.

02:04

I'm gonna give it a horizontal distance of 130.25 mm

02:09

from here. I'm going to dimension to the center point of each of these filets.

02:13

This is going to be 2 mm

02:16

And then we'll add a dimension from that point back here,

02:19

horizontal dimension will be 15.5

02:22

and you can see now we have a fully defined sketch.

02:25

Let's go ahead and finish the sketch and extrude this into three D.

02:29

I'm gonna go ahead and use extrude and I'm

02:31

going to pull this outward a distance of eight

02:34

because I know this is a molded plastic part. I'm also gonna add one degree of draft

02:39

depending on the direction you're extruding. This may need to be a negative value.

02:44

Once we have the negative value,

02:45

I'm going to use my modify and fill a tool to add a rounded corner on the outside.

02:51

I want to add a thickness value of two,

02:53

which matches the radius that we had on the corners.

02:57

Next we can add a little bit more detail. If we want to add some of the recesses,

03:01

we don't have to exactly match the underlying image,

03:03

but we can right click on this face and create a new sketch

03:06

and we can just add some slots to add a little bit more shape.

03:10

So we'll select the slot tool,

03:12

we'll do a center to center slot

03:14

and I'm simply going to add a small slot here

03:18

and I'll add another one next to it and then

03:20

we'll come back and we'll dimension these in a minute

03:22

and I'll add one more just for a little bit of texture.

03:26

Some of the constraints have automatically been applied.

03:29

You can see there are parallel constraints between some of the edges and centers.

03:33

Now we want to make sure that the radius value of all three are the equal.

03:37

And I'm going to add a constraint for these bottom edges but

03:42

I want to add a line that goes between all of them.

03:44

So I'm going to add a line here and another line here.

03:48

I want to turn these into construction by selecting them hitting X on the keyboard

03:52

and then I also want to make them co linear with each other.

03:56

Then we can make one of these lines parallel with the bottom edge

03:60

escape to get off our constraint tool.

04:02

Go ahead and pull this down

04:03

and we can manipulate the tops.

04:06

If you get into a situation where the slots start to get deformed,

04:11

let's go ahead and do undo and start to apply some dimensions.

04:15

We'll add a dimension between these points

04:18

given

04:20

and we'll do the same thing over here.

04:23

I'm going to select the original 2.5 to link them together

04:26

And now I want to determine its distance from this corner.

04:30

I'm also going to make this 2.5 mm.

04:34

Now we need a radius value.

04:36

This is gonna be .75

04:39

and then we can determine the heights

04:43

For this. I'm going to say 3.5 mm for the back one.

04:48

We're gonna give this one a three millimeter height and

04:51

we're going to give this one a 2.5 millimeter height.

04:56

Next we'll dimension the distance between these parallel edges at .75,

05:01

you can see this is still not fully dimension.

05:04

We're gonna hit escape on the keyboard.

05:05

And as we begin to try to drag things around,

05:08

you'll notice that the angle is not fixed yet.

05:10

So we'll take one of these center lines,

05:12

we'll take the side line and we'll go ahead and make this parallel.

05:17

We'll finish the sketch, we use E to extrude

05:21

And we'll go ahead and remove a small amount of material

05:24

once again because these are injection molded parts,

05:27

we're going to go ahead and use a -1° draft

05:29

to make sure that we have draft on these features.

05:32

The last thing that we're going to do is hide

05:34

the canvas and we're going to shell the backside.

05:38

I'm going to use a 1.5 millimeter value and you'll notice that the operation failed,

05:43

partially failed because of these features.

05:45

If this ever happens, we can cancel out,

05:48

we can roll back the timeline before the extrude before

05:51

we add those details and then try the shell again

05:54

once more. Let's try 1.5 millimeters and you can see that it is able to be generated.

05:59

Will say, okay,

06:01

and then we'll roll the feature back to the end of the timeline.

06:05

Now we've used the canvas image and we've

06:07

created a rough approximation of the trigger lock

06:10

at this point. Let's go ahead and save the design before moving on.

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