exercise solutions 4

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Appendix

A

pp endix Summary:In this Appendix, we will see the solutions to all of the exercises for th

aining guide.

sson 1 _________________________________________________________ A-2sson 2 _________________________________________________________ A-2

sson 3 _________________________________________________________ A-4

sson 4 _________________________________________________________ A-8

sson 5 _________________________________________________________ A-33

sson 6 _________________________________________________________ A-38

sson 7 _________________________________________________________ A-45

sson 8 _________________________________________________________ A-47

sson 9 _________________________________________________________ A-59

sson 10 _________________________________________________________ A-62

sson 11 _________________________________________________________ A-64

sson 12 _________________________________________________________ A-80sson 13 _________________________________________________________ A-87

sson 14 _________________________________________________________ A-96

sson 15 _________________________________________________________ A-101

sson 16 _________________________________________________________ A-107

sson 17 _________________________________________________________ A-113

sson 18 _________________________________________________________ A-117

sson 19 _________________________________________________________ A-121

sson 20 _________________________________________________________ A-130

sson 21 _________________________________________________________ A-132

sson 22 _________________________________________________________ A-137

sson 23 _________________________________________________________ A-140sson 24 _________________________________________________________ A-143

sson 25 _________________________________________________________ A-143

sson 26 _________________________________________________________ A-145

sson 27 _________________________________________________________ A-147

sson 28 _________________________________________________________ A-150

sson 29 _________________________________________________________ A-150

ontinued on Next Sheet)

le:///C|/Documents and Settings/Administrator/Desktop/PROENGINEER WILDFIRE 3.0/WF2_AppendixA_1.htm

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Using the Navigator

Using the navigator, locate the folder that we want to switch over to. If you are not in the file explore

portion of the navigator, click on the following icon at the top of the navigator.

Once you find the ProETrainfolder, hold down the right mouse button over this folder to see the

available options, as shown below.

As indicated above, select the Set Working Directorymenu option.

Using the System Toolbar

A second way to select your working directory was to click on the following icon in the system toolba

(the row of icons across the top).

This brings up a separate window, entitled Set Working Directory, and looks like the figure at the to

the next page.



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Use the pull-down field in the upper left of this window to start your search, and then select theProETrainfolder in the main portion of this window. Click on OKto finish.

Menu Bar

The third way to set your working directory uses the menu bar at the top of the Pro/ENGINEER wind

We would select File, followed by Set Working Directory, as shown below.

This brings up the same window shown previously. Select the folder, and then click on OKto finish

setting the working directory.

Spinning, Panning and Zooming the Model

To spin the model, use the middle mouse button all by itself. Hold down this button and keep it held

down during the duration of the spin, then release to stop the model in its new orientation.

To zoom the model, hold down the Ctrlkey on the keyboard and then press and hold the middle mo

button. Moving the mouse up and down will zoom the model in or out. Moving the mouse from right

left will tilt the model about an axis normal to the screen. Once you initiate a zoom or tilt, you must le

of the mouse button and press it again to select the other option.

To pan the model, hold down the Shiftkey on the keyboard and then press and hold the middle mou

button. Release the middle mouse button to stop the model in its current location.

If you have a scroll button for a middle button, you can use this wheel to zoom in or out. If you press



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scroll button down, it behaves as if you only had a plain middle mouse button for the regular spin, pa

and zoom options.

Default and FRONT Views

The default view icon is located in the system toolbar, and looks like the following.

To access other saved views (such as FRONT, TOP, RIGHT, etc.) click on the following icon in the

system toolbar.

Then, select one of the views listed below this icon. In this case, we select the FRONTview.

ESSON 3 Selecting Objects

Edge Selecting

The easiest way to do this is to first start by changing your selection filter to Geometry. This is locat

the lower right corner of the Pro/ENGINEER window, as shown below.

Next we will begin by selecting one of the edges on the outside of the flat surface, as shown in the fig

below.

It will turn a bold red. Now, we will hold down the Shiftkey on the keyboard, and then move our mo

cursor to the rounded edge just above (and connected to) the line that we just selected. The entire

outside surface edge should highlight in blue, as shown below.



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While we can see the entire outside boundary loop of this surface highlighted in blue, we will click on

with the left mouse button. The blue highlight should turn into a bold red outline, which indicates tha

selected, as shown below.

We still have two additional sets of edges to select, so we will begin by holding down the Ctrlkey on

keyboard to select multiple objects, and then select the bottom flat edge of the next set, as shown be

As we did before, release the Ctrlkey and press the Shiftkey on the keyboard. Move your mouse

cursor over one of the two vertical edges that touch our selected edge. The entire loop of edges aro

this hole/keyway should be highlighted in blue, as shown in the next figure.



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With the entire set of edges highlighted, click once with the left mouse button to select these edges,

we can see in the following figure.

Release the Shiftkey, and then hold down the Ctrlkey on the keyboard to make our third selection.

This time, select one of the two halves of the upper hole, as shown below.

Once again, hold down the Shiftkey and place your mouse cursor over the other half of the circle to

the whole circle highlight in blue, as we can see below.

Finally, click once with the left mouse button to select this hole once it is highlighted in blue. It will be

selected as shown in the following figure.



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Seed-and-Boundary Surface Selecting

The last part of this exercise could have been done using the Ctrlkey and selecting all of the surface

that are shown (the ones that are meshed). We wanted you, however, to try using the seed and

boundary method for selecting.

To do this, we first have to determine which surface is the seed and which surface(s) represent the

boundary. Remember the boundary surface can be made up of multiple surfaces, and is not includin the final selection. The seed surface can only be a single surface, and it is included in the final

selection.

Knowing this, we would pick the following surfaces for our seed and boundary selections.

To actually perform the selecting, do the following steps. First, make sure that you still have Geome

selected for the selection filter. Then, click on the seed surface first (the large half cylindrical surface

the bottom of our model). Next, hold down the Shiftkey on the keyboard and start selecting the surf

of the boundary that you can easily get to.



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Once you have selected the first part of the boundary surface chain, let go of the Shiftbutton. You w

most likely see a set of selected surfaces that do not conform to what you want. Do not worry about

this. Use the middle mouse button to rotate the model until you can see the next set of boundary

surfaces to select, and then press the Shiftkey again. Do you notice something? The only selected

surfaces that we see are the ones that we selected before we let go of the shift key the first time. It

remembers what we already selected, so when we let go of the key to spin the model, then pressed

again, it was as if we never let go of the key in the first place.

Finish selecting the rest of the boundary surfaces with this technique, and once they are all selected

release the Shiftkey again. You should see all of the surfaces that touch the boundary surfaces (bu

the boundary surfaces themselves). Included in this will be our seed surface.

The figure below shows this.

Close out of this model using Window, Closefrom the menu bar, and then erase session memory u

File, Erase, Not Displayed. Click on OKto confirm the objects being erased.

ESSON 4 Sketcher Basics

Sketch 1 Shear Plate

For this sketch, start by going to File, New, and then select the Sketchtype. Be sure to enter the na

Shear_Platein the appropriate field, as shown in the next figure.



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Click on OKto get into the sketch. Once inside sketch mode, it is easier to start sketching if we turn

the display of dimensions. Therefore, we will click on the following icon in the system toolbar to de-s

it.

Next, we are going to use the line tool ( ) and sketch the outline of our overall shape. Rememb

the goal is to sketch quickly and somewhat accurately. We are going to watch our constraints to ma

sure we see the H at the bottom of the sketch, and we also are going to look for the perpendicularsymbol in the upper left of the sketch. When we are done sketching the lines, click on the middle mo

button to get out of line creation mode. Our sketch looks like the following.



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Be sure to see the parallel symbol appear when the line is parallel to the appropriate side. Since we

dont really need this line to create geometry, we are going to turn it into a construction line (similar to

centerline, but with a fixed length). To do this, we are first going to select on the line so it turns red.

Then, we will hold down the right mouse button over the line and select the Constructionoption, as

shown in the next figure.

Once we do this, the line will become dashed, indicating that it is not a solid sketcher line anymore, bconstruction line that is for reference only. The figure below shows this resulting construction line.



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We are going to repeat this same process to create another construction line. This will be the line th

runs down the center of our slot. Therefore, start by creating a solid line that originates at the top of

existing construction line, as shown below.

Be sure that no automatic constraint is applied (such as another parallel or perpendicular or equal le

etc.). Next, select this new line and right mouse click on it and select Construction, just as we did w

the last line. It will become a construction line, as shown in the following figure.

Now, we will sketch our slot. To start the slot, we know that the top arcs center lies on the intersecti

the two construction lines, therefore, we will use a center-ends arc ( ) and start by clicking on th

vertex where the two construction lines meet.

When you drag out the diameter/radius for the arc, try to get your starting location to be on an invisib

line that is perpendicular to the second construction line, through the center of the arc that we are

sketching, as shown below.



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Once you click with the left mouse button to start the arc, move your mouse cursor to the opposite si

the construction line, thus forming an approximate 180 degree arc, as shown in the following figure.

Now, we will return to our line tool, and sketch a line at the right endpoint of this new arc. We want to

make sure the line is tangent (look for a T symbol) to the arc, and parallel and equal in length to the

short construction line, as shown on the next page.



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To sketch the bottom arc, we will use a tangent-end/3-point arc ( ). Start by clicking on the end

the solid line that we just sketched. When the green circle with the X appears, come out of the bott

quadrant, and move the end of the arc over so it creates an approximate 180 degree arc, as shown

below (NOTE: the arc center should snap to the end of the construction line, and our equal length

symbols disappear).

When we click with the left mouse button to finish the arc, the green circle will go away, and our resu

arc will look like the following.

To finish the slot, we are going to use a line tool again, and connect the two open arc ends. A tange

symbol T should appear at both ends if we sketched the arcs at approximately 180 degrees.



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Our sketch is now fully constrained the way we want it. Now, we must address the dimensions.

Therefore, turn back on the view of dimensions. Your model should have a lot of gray (weak)

dimensions on it.

The figure below shows the dimensions that are on my model but yours may be slightly different.

You should NEVER leave dimensions weak. Therefore we will either add new dimensions (which

automatically come in strong), or convert weak dimensions over to strong dimensions that are alread

the sketch that we want.

For example, there are many angular dimensions on this sketch that are the ones that we want, so

instead of re-creating these dimensions, we can simply select them with the left mouse button, then h

down the middle mouse button and select Strong. In this example, we have the following dimension

that already exist that we will make strong. (NOTE: Your sketch may or may not have these exact

dimensions, but dont worry, you can always create the correct ones). Also, the figure below omits th



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rest of the dimensions for clarity; on your screen you will see all of the dimensions that are available.

Once the dimensions are made strong, they will appear in a bold yellowish cream color (black in this

guide), and they stand out from the weak gray dimensions, as shown below.

Now, we are going to create the rest of the dimensions that we need. When we create a dimension,



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comes in strong automatically, and one or more weak dimensions will disappear to leave the sketch

constrained.

We will start by clicking on the dimension tool ( ). The first dimensions that we will add will be

lengths of the lines around the border of the sketch. To dimension the length of a line, simply click o

line once with the left mouse button, and then place the dimension by clicking with the middle mouse

button where you want the dimension, as illustrated for our first dimension below.

We will repeat this process to create all of the rest of the seven linear dimensions around the outside

the sketch, as shown below.

Notice that many of our weak dimensions are gone. Now, we will repeat this same sort of process to

dimension the distance between the slot and the left hole, and the length of the slot itself.



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We will click once with the left mouse button on the construction line between the left hole and the to

the slot, and then use the middle mouse button to place the dimension. Do the same for the other

construction line that goes between the two arcs in the slot. The resulting dimensions look like the

following.

The next dimension will be the width of the slot itself. To create this dimension, click on the right out

straight edge of the slot with the left mouse button, then click on the left outside straight edge of the s

with the left mouse button, and then use the middle mouse button to place the dimension, as shown

below. Again, the surrounding dimensions have been omitted from the following figure for clarity onl



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Our next dimension is the distance between the two holes. To create this dimension, select on one o

the circle centers with the left mouse button, followed by the other circle center (using the left mouse

button again), and then click with the middle mouse button to locate the dimension.

There is only one more dimension on this sketch that needs to be created. It is an angular dimensio

the right side of the sketch. To create an angular dimension, select on one of the angular lines with t

left mouse button, followed by the other angular line (also using the left mouse button). Once both li

are selected, place the dimension using the middle mouse button. The following figure shows thisangular dimension.

All of the weak dimensions should be gone. If not, you either do not have all of the dimensions place

the sketch, all of them have not been made strong yet, or you do not have enough constraints, as

defined earlier.

The fully dimensioned sketch should look like the figure at the top of the next page.



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Once we have all of the dimensions created and strong, it is time to modify them. Notice that most o

linear dimensions are on the order of a few inches (largest is about 4.3 inches). However, in our

exercise, the smallest linear dimension is actually 19 (the width of the slot).

If we were to simply try to modify each dimension one-by-one, our sketch would either fail regenerat

or it would terribly distort. The best approach in this case is to use the lock scale option to scale up t

sketch to a better range of dimensions.

To do this, we will first click on the following icon in the sketcher toolbar.

We will drag a box around the entire sketch. All of the dimensions, constraint symbols and sketched

entities (lines, arcs, circles, etc.) will turn red.

Next, we will click on the modify icon ( ). This will bring up the window shown at the top of the

page.



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To lock the scale, we will first click in the box to the left of the words Lock Scale. Next, we select o

the dimension that we want to change that will drive all other dimensions to update. In this case, we

scroll through the available dimension fields until we see the one that represents the linear dimension

the horizontal line (the one marked H).

When we select on this dimension from this window, a box will appear around the dimension on the

sketch, as shown in the following figure.

We will then edit the value for this dimension to 94.0. Once we hit the enter key, all of the dimension

this modify window will change to match the same scale as the dimension value that we entered, as

can see in the following figure.



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Save the sketch, then use Window, Closeto finish.

Sketch 2 Latch Plate

When we look at this sketch, we can see that it is symmetric about a horizontal centerline. Thereforeour goal is to take advantage of this symmetry by sketching only half of the shape, and then mirror it

Therefore, we will start by creating a new sketch, called Latch_Plate. The first entity will be a

centerline. To create this, click on the following icon in the line tool flyout.

Click out in the middle of the sketch window, and snap the centerline so it is horizontal (you should s

the H symbol), as shown below.

Now, we are going to use the line tool to sketch the following shape (and it probably works best and

fastest in the order shown below).



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In the figure above, LMB means Left Mouse Button and MMB means Middle Mouse Button. B

sure to avoid any equal length constraints or any line up horizontal or vertical constraints. You sho

only see horizontal H and vertical V constraints, and two collinear constraints where the lines con

to the centerline.

Also, there is no line connecting the two points that lie on the centerline, it is left open for now.

The next thing we will do is create a fillet at the upper left corner of the sketch. To do this, click on th

following icon.

Then select the two lines that intersect in the upper left corner of the sketch, as shown in the figure a

top of the next page.

The resulting fillet will look like the following.



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Repeat this process to create the other fillet near the right side of the sketch, as shown completed be

The next thing we will sketch will be the circle that lies at the center of the first fillet that we created.

Therefore, click on the circle tool, and then click with the left mouse button on the fillet arc center and

drag out the radius. Click with the left mouse button to finish the circle, which will look like the figure

the top of the next page.



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Next, create another circle. When selecting the location for the center of the circle, try to get the Lin

Horizontal symbol to appear first, and then click on the sketch approximately below the vertex show

the following figure. Drag out the radius until you see the Equal Radii symbol appear.

We have two arcs left to create. Therefore, click on the center-ends ( ) arc tool, and create a 9

degree arc at the location shown in the following figure.

Be sure to make the arc large enough so that no equal radii symbols appear on it. If you get an equa



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radii symbol, you can delete it later.

Now, we are going to use a tangent-end/3-point arc ( ) and click at the end of the arc that we ju

made, and drag out the end of the arc to other line end, as shown below.

The following figure shows our half section after we are done sketching all of the entities.

Normally, we would finish sketching the entire section before addressing the constraints, but in the c

of mirroring, it is best to get your section and constraints in order before you mirror, but we will not de

with dimensions at this time.

Therefore, we will first start by turning all of our weak constraints into strong ones. The figure at the

of the next page shows all of our constraints once we turn them to strong constraints.

NOTE: If you do not have one or more of these constraints, you can always add them at this time.



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We need to add one additional constraint before we mirror. We will use the icon, followed by

and select the center of the right circle with the vertex at the top of the model that is lined up wit

this circle. The result is shown below.

To mirror the sketch, we will first use the select tool ( ) to drag a box around the entire sketch sthat all the entities, and constraints become selected. Next, we will click on the mirror tool, which loo

like the following icon.

Select on the horizontal centerline that we sketched, and our section should now be one complete

sketch, as shown at the top of the next page.



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You will see a bunch of arrows. These arrows represent a symmetric constraint, and are always se

vertices or arc centers when you mirror a sketch.

We will need to add one additional constraint before we are ready to dimension. To do this, we are g

to go back into the constraint tool, then select the collinear constraint ( ). We are going to sele

on the two arc centers shown in the following figure.



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Now, we are going to turn off the display of constraints by clicking on the following icon.

Then, turn on the display of dimensions (use the icon to do this). Our weak dimensions appea

the sketch, as shown below.



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NOTE: I have moved the weak dimensions around to see them more clearly.

As we did in the last exercise, we will look for any dimensions that we need that are already in the

sketch, and turn them into strong dimensions. We do this by selecting all of them using the Ctrlkey,

then hold down the right mouse button and select Strong.

The following figure shows the resulting dimensions in this example that are already there and have

converted to strong.



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Now it is just a matter of adding additional dimensions until we get the dimensioning scheme that we

in the exercise. The resulting dimensioning scheme is shown below.

The last thing we must do is modify the dimensions to their correct values. Unlike the last exercise, w

dont have a huge jump, but we want to be careful in the order that we pick if we just want to modify o

by-one.



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The other option is to select all of the dimensions by dragging a box around the entire sketch, select

modify tool, uncheck the Regenerateoption, and then modify all of the dimensions one-by-one in the

modify window.

When we are done, we click on the green check mark, and our sketch will regenerate and look like th

final version that we need, as shown below.

Save this sketch, and click on Window, Closeto finish out of the section.

ESSON 5 Sketch Feature

Start by going to File, Newfrom the menu bar, and when the window opens, make sure that Part isselected, and enter Plate_Layout, for the name, as shown in the next figure.



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The Sub-Typeshould be Solid. Click on OKand you will get the next window.

For this model, our units are in inches, so select the startpart_englishfile, or whatever equivalent En

start part you may have. Click on OKto continue. You will see your default datum planes (assuming

they are turned on).



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From the datum fly-out icon, select on the Sketch tool, or use Insert, Model Datum, Sketch, from th

menu bar. We will get the following window.

We will pick on the TOPdatum plane to use as our sketching plane. When we do this, it automatica

assumes we want to use the RIGHTdatum plane as a reference, and faces it towards the Right, as

shown in the next figure.

There is a yellow arrow pointing down from the TOP datum plane, indicating the viewing direction. W

will accept this, and click on the Sketchbutton. This places us into our 2D sketch mode. Turn off da



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planes, and you will see the following.

We can see two orange dashed lines. These lines are NOT centerlines. They represent sketcher

references. Our sketcher references window should be open, and we can see that the FRONT and

RIGHTdatum planes (which are perpendicular to the TOP datum plane our sketching plane) have

been selected automatically as sketcher references.

We will not need to select any additional references at this time, so we will click on the Closebutton

will now use a rectangle tool and sketch a rectangle where the lower left corner lays at the intersectiothe two sketcher reference lines.

When the rectangle is done, we will go ahead and modify the dimensions to 10.000 and 5.000. NOT

The reasons we are going ahead and modifying the dimensions at this time are two-fold:

The sketch is simple enough that modifying the dimensions now will not cause the ske

to fail.

The dimensions originally come in very large compared to our final values. Modifying t

two dimensions now will cause the sketch to scale down so our remaining entities will be clos

to their final values.



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The sketch should look like the following at this time.

We will now switch to the circle tool. Sketch a circle in the upper left corner of the rectangle. Cha

the dimension values to their correct values as shown in the next figure.

Next, we will sketch a second circle in the upper right corner of the rectangle. When placing the

circle, snap to a horizontal alignment, and also snap to equal radii. Modify the single dimension t

correct value, as shown in the next figure.



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Click on the blue check mark to complete the sketch, turn on your datum planes, and go to a defa

orientation. Your model will look like the following.

Save and close this model.

ESSON 6 Extrude Feature

Plate_Layout

Open up the Plate_Layout2model. It consists of two sketched features, as we can see in the m

tree.



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The model looks like the following.

We will start by selecting on the Sketch_Platesketch from the model tree so it highlights in red o

model. Now, pick on the Extrudefeature. When we do this, the dynamic preview automaticallyappears, because we have decided to use an external sketch.

We will change the depth to 2.0inches, and then click on the green check mark to complete this f

extrude feature. Our model looks like the following (no hidden mode).



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In our model tree, we can see that the first sketch is now hidden, because it has been used in an

extrude feature.

If we need to see this or use this sketch again, we can always unhide it. For now, we will pick on

second sketch (SKETCH_CIRCLES), and then click on the extrude icon again.

This time, when our dashboard opens, be sure to select on the Remove Materialicon. Change t

depth value to 1.0, and be sure it is going up into the part, as shown in the next figure.

Click on the green check mark to complete this extruded cut, and then rotate the model to see the

result.



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Save and close this part.

Safety_Key

Create a brand new part called Safety_Key. Use an English start part (if available). While there

be multiple ways to create this part, we will demonstrate one method that utilizes simple sketches

and a low number of features. We will also use internal sketches. To do this, first select the extrutool, and then right click on the working window and select Define Internal Sketch.

The following images show the progression of this model.

Extrude 1 TOP plane as Sketching Plane, RIGHT plane facing towards the Right.

SKETCH

DYNAMIC PREVIEW FINISHED EXTRUDE



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Extrude 2 Select Use Previou sfor sketching plane and sketching reference.

SKETCH


Extrude 3 (Cut) FRONT plane for sketching plane, RIGHT plane facing towards the Right.



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SKETCH

OPTIONS SLIDE-UP PANEL


Extrude 4 (Cut) RIGHT plane as sketching plane (default viewing direction), TOP plane facing

towards the Top.



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SKETCH


NOTE: For the dynamic preview, you will need to change the depth option to Through All, and fli

the direction to go back into the part, as shown in the figure above.


IMPORTANT:For the first cut feature, we chose to combine the circular hole and the rectangular

out in a single extrude feature. For greater flexibility, you may wish to separate them, but for this

example, both are very simple shapes, and easy to modify in the same sketch. If you were requir

to delete one of these entities, you would have to edit the sketch and remove the profile.

Rod_Suppor t

Create a brand new part called Rod_Support. Use a metric start part (if available). As with the l

part, we will demonstrate the preferred method for creating this part using simple sketches and

flexible features.

Extrude 1 RIGHT plane for Sketching Plane, and TOP plane facing towards the Top.



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SKETCH


Extrude 2 (Cut) FRONT plane for Sketching Plane, RIGHT plane facing towards the Right.

SKETCH



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OPTIONS SLIDE-UP PANEL


Extrude 3 (Cut) TOP plane for Sketching Plane, RIGHT plane facing towards the Right.

SKETCH




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NOTE: A Through Alldepth is used for this cut, and the direction must be flipped to go through th

part.

Extrude 4 (Cut) RIGHT plane for Sketching Plane, TOP plane facing towards the Top.

SKETCH


Again, the dynamic preview indicates a Through Allcut that goes back into the part, resulting in

finished part shown above on the right. We could have created this hole in our first extrude featu

well. The same rules apply, if we needed to separate out the features later, we would have to red

the sketches for the features.


ESSON 7 Making Changes

Open up the Plate_Layout2model that we created in Lesson 6. Right now, we have a 10 x 5 x

plate that has four 1 holes going 1 into the part.



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To turn these holes into feet sticking out of the model, we must change a protrusion into a cut, an

must change both the direction and depth of the feature. To do all of this, we will need to use the

Definitioncommand.

Therefore, we will select on the Extrude 2feature from the model tree with the right mouse button

and select Edit Definition, as shown in the next figure.

This brings us back into the dashboard for the feature, and it looks like the dynamic preview we s

before:



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The first thing we will do is to de-select the Remove Material icon, turning the extrude from a Cut

a Protrusion. The preview now shows solid shading for these holes, as shown in the next figure.

Next, we will click on the yellow arrow to flip the direction of the feature, and change the value to 0

The preview now looks like the following.



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Click on the green check mark to complete the changes to this feature, and now our model looks

the following:


ESSON 8 Datums Part 1

Create a new part called Angle_Bearing. The trick to this exercise model is to understand that o

raised cylindrical protrusion, and the hole that goes down it are perfect circular shapes when view

at the section A angle.

Therefore, we need to have a sketching plane that is parallel to this section plane. So, the trick is

getting that sketching plane. Once you have that, everything else is relatively simple.

Extrude 1 T shaped base

We will start by creating an extrude feature. Use an internal sketch, and use the FRONTdatum p

as the sketching plane. Face the RIGHTdatum plane towards the Right, and sketch the following

profile.

Click on the blue check mark to complete the sketch, and use a symmetric depth of 103.0, as sho

in the dynamic preview.



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Click on the green check mark to complete this first extrude feature. The model currently looks lik

the following.

Now, we will start to create our datum features.

Datum 1 Datum Axis

To get started, we need to create a datum axis. Why? In order to have a datum plane that is at a

angle (as our section A plane is), we need an edge or axis to revolve through. We cant simply

an edge on the model, because we need to control where the axis of the cylinder connects with thright edge of the model (as indicated by the 33.0 dimension).

Therefore, we will click on the datum axis tool (or use Insert, Model Datum, Axisfrom the menu

bar). This brings up the following window.



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We will create an axis that is normal to a surface, located from two additional surfaces. Therefore

select on the following surface location.

When we do this, the surface highlights in a mesh (in no hidden mode or a rose-color shade in

shaded mode). We can also see two drag handles to locate the axis, as shown in the next figure

We will drag one of the handles over to the front T-shaped face, and the other to the side

rectangular surface, giving us two linear dimensions, as shown in the next figure.



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Your dimensions will be different unless you picked the exact location I picked in this example. W

will modify the distance to the front face to 33.0, and the distance to the side as 0.0, as we can se

the following figure.

This places the axis exactly where we need it for our first datum plane. At this time, our axis wind

looks like the following.

We will click on OKto finish this axis, and turn on the display of datum axes to see the result.



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