Bore mounting holes

00:02

Bore mounting holes.

00:05

After completing this video, you'll be able to use bore to finish mounting holes

00:12

in fusion 3 60. Let's carry on with the data set. From our previous example.

00:16

At this point, we've taken care of a lot of the machining so far,

00:19

including the two D pocket and the two D

00:23

contour to finish off certain areas of the design.

00:26

However,

00:27

there are still areas where we need to spend

00:29

a little bit more time and focus our attention.

00:31

For example, the counter bores that are used for a socket head cap screw,

00:36

these have been drilled from the other side.

00:38

When we take a look at the stock left over,

00:40

you'll notice that it doesn't come all the way through

00:43

after we do our two D adaptive and we do our facing tool path.

00:46

We can now see those holes because they were drilled all the way through.

00:50

But we need to go back in and we need to counter bore them from this side.

00:54

As we mentioned before,

00:55

there are many different tool paths that can perform as similar operations.

00:58

And it kind of depends on what your end goal is.

01:01

We've already taken a look at using two D pocket, two D contour and the bore tool path,

01:07

we know that there are similarities and differences between the various options.

01:11

So for this example, we are going to be using the two D bore tool path again.

01:15

But let's take a look at how it works with the two D contour

01:19

with a two D contour.

01:20

We first want to begin by selecting our tool in this case,

01:23

tool number five or quarter inch flat and mill.

01:26

Then we need to select our geometry which is going

01:29

to be either the bottom edge or the face.

01:32

In this case, I'm going to select the bottom edge of both of the counter bores.

01:36

Noting that the red arrow is on the inside.

01:39

Then we want to move over to our heights to

01:42

make sure that we're going down to the selected contour

01:45

for our passes.

01:47

We can add additional finishing passes, we can add roughing multiple depths.

01:51

All of these options would work very well for us.

01:54

However,

01:54

we're gonna do just a single pass because we're not gonna be keeping this tool path.

01:59

Next, we can take a look at our linking parameters

02:02

right now. The default is for us to come in and lead in and lead out to those contours.

02:08

We can use pre drill positions, for example, by selecting these two positions

02:13

and we can use the same for our exit positions.

02:17

Let's go ahead and select OK, and take a look at what our warning is.

02:21

In this case,

02:22

it tells us that our pre drill positions cannot be

02:24

drill positions because keep tool down is not activated.

02:28

So in this case, we can ignore the warning or we can select no and make changes

02:33

over here, we can select keep tool down,

02:36

we can say, OK. And now it's able to use those pre drill positions.

02:40

Let's do a quick simulation to see what's happening with this tool path

02:46

inside of the simulation.

02:47

I'm going to hold down the left mouse button and simply drag through.

02:51

You can see that we're bringing the tool in and we're still in a rapid movement.

02:55

We can see that the tool preview is yellow, which means that we're wrapping down.

02:59

Remember, this hole was drilled at 0.257 or an F drill

03:04

and the tool that we're using is quarter inch.

03:06

This means that there's not much material between the two.

03:09

If we're gonna wrap it into this hole,

03:11

that can be a potential problem because it hasn't been pre drilled enough,

03:15

then we can see that the tool is moving outward and doing all this with a single pass.

03:21

There are other options that we have for a two D contour.

03:24

If we take one more, look at the tool path

03:26

instead of using our pre drill positions,

03:28

we can use a ramp option and we can clear our pre drill positions,

03:33

the ramp will allow us to use a ramp that goes along

03:36

the selected contour all the way down to the final depth.

03:39

If we take a look at the tool path, now, we can see that we're using a helical ramp

03:44

once more. Let's take a look at simulate

03:46

because the heights are set so high.

03:48

What ends up happening is we wrap it well above the part and

03:51

then we start this helical ramp that happens for quite a long time.

03:55

This is obviously a waste of time and movement for the tool path

03:59

and we can make some adjustments to the height of our tool paths.

04:02

But in essence,

04:03

what happens is we're using a helical ramp

04:06

at two degrees down the entire selected contour.

04:10

This looks just like the traditional helical ramp that we have when entering stock.

04:14

However, it's different because it's based on our contour selection,

04:18

it just happens to be a circle.

04:20

So in this case,

04:21

let's go ahead and right click and we're going to delete the two D contour.

04:25

And once more, we're going to select two D and select the bore tool path.

04:29

Again, we're going to be using tool number five, which is our quarter inch and mill.

04:34

And for our geometry, we're going to select the counter bore faces.

04:38

Remember that with our bore tool path, we're selecting faces,

04:41

not an edge or a contour.

04:44

What we have here is a tool path that's a little

04:46

bit more optimized for where the tool starts and stops.

04:50

You'll notice as we rotate around that we are rapping down

04:54

and then we're using this linking parameter that comes in and

04:57

then begins that helical motion at the top of the hole.

05:00

As we move over to our passes section,

05:03

we have a two degree ramp angle that we were using

05:06

similar to what we had in our two D contour.

05:09

If we want to, we can add multiple passes as well as finishing passes if needed,

05:14

adding a finishing pass will allow us to create a helical ramp all the way down

05:19

and we can produce a finishing pass all the way at the bottom.

05:22

This can be helpful to allow us to clear out material efficiently

05:26

and then do a small step over at the very bottom.

05:29

In this case, let's say 0.01

05:32

we don't have a critical tolerance that we need to follow for

05:35

this since it's only clearance for a socket head cap screw.

05:38

But there are different ways in which you can approach this with a two D contour,

05:42

a pocket or a board tool path.

05:44

Let's do a quick simulation to validate what's going on with this tool path.

05:49

Once again, what we're doing here is we're rapiding down.

05:53

And as we get close, we begin the helical entry motion just before the hole

05:58

because we are using a finishing pass, it's gonna go down

06:02

and remove most of the material

06:04

while it's showing the hole in green,

06:06

we can tell that it's not cutting all the way out.

06:08

Part of the reason it's green is because our tolerance value is 0.02

06:12

and the stock we're leaving behind is 0.01.

06:15

I'm going to slow the speed down and allow it to go through cutting all that geometry.

06:20

What we should see is as it gets close to the bottom,

06:23

it's going to do a move over and do that final cut of

06:31

going to move over to the other hole and perform the exact same operation.

06:35

So once again, you need to pick the tool path that works well for what you're doing.

06:39

In this case,

06:40

we could have used a two D pocket A two D contour or the two D board tool path

06:46

at this point.

06:46

Let's make sure that we go back to our named view and save this before moving on.