ucf - solidworks ii

7/27/2019 Ucf - Solidworks II

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SOLIDWORKS: Lesson II

Revolutions, Fillets, & Chamfers

UCF Engineering


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SolidWorks Review

Recall that in the last lesson we started

building basic parts in SolidWorks using onlyextruded solids (boss/base) and extrudedcuts.

This lesson we will be learning about three

new features that are typically used formodeling basic parts.


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Revolutions

The first feature that we are going to look at

is the revolution.

material (Revolved Boss/Base) or removematerial (Revolved Cut), either way the

mechanisms are the same.


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Revolutions

The basic idea is that a revolution takes a closed cross

section and revolves about some axis of revolutionto produce a solid object:


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Revolutions

Although there are certainly cases where you can onlyproduce a particular geometry using revolutions,

oftentimes geometry can be produced by usingeither revolutions or extrudes.


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Revolutions

For example, say you wanted to model thesimple part that we have been looking at so

far: As 2 extrudes we would create:


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Revolutions

Now, what would happen if we wanted to change

the diameter of the cut hole?

We would either need to change it in both of our

extrudesor we would need to have set up theproper relationships so that it would be automaticallychanged for both.

The problem is to change the diameter of onefeature, we need to change 2 dimensions


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Revolutions

What about if we used revolutions?

Here we draw one crosssection, and we can easilychange the primary features by

.


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Revolutions ExerciseLets begin by opening

SOLIDWORKS and makinga NEW PART. Lets chooseREVOLVED BOSS/BASEfrom the dynamic toolbar.

Under properties manager you will be

asked to chose a plane.


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Revolutions ExerciseYou should now see the properties manager for

REVOLVE and a green rectangle. The dashed line inproperties manager is called the axis of rotation of

which it is looking for one. So lets click the left verticalline to see what happens.


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Revolutions ExerciseIn the features tab,

expand the REVOLVEselection and click

sketch.

Then RIGHT CLICK onsketch and chooseEDIT SKETCH.


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Revolutions ExerciseSo you can see that once you

edit the feature that theobject still rotates aroundthe left vertical line of the

rectangle we just drew. Ourcenterline is visible, but theobject does not rotatearound it.

In the properties manager, click on the axis boxhighlighted in pink where you see that thecurrent axis is line 2. We want to change this tothe center line. So after clicking in the box, click

on the center line. Then exit the sketch.


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Revolutions Exercise

We now see the changesevident in making the

object rotate around acenter line.

NOTE: If we had drawn the centerline FIRST, Solidworks would haveautomatically chosen the centerlineas the axis of revolution as it

assumes that is what we want todo.


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Fillets and Chamfers Exercise

Click on fillet. You should see that it isasking you to select an EDGE. Letsclick the top face.

You should see a yellow wire frame and if you dont, select FULL PREVIEWfrom the properties manager.


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You should now see the

part with beveledoutside and insideedges.


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Fillets and Chamfers ExerciseLets save our current part. Then exit out.

Click NEW, choose Part, then OK. Nowcareful inspection of our design we seethat we are possibly NOT using metersas a unit. Lets change the units tomillimeters.

Start by right clicking on the PART name inthe feature manager and chooseDOCUMENT PROPERTIES.

A window will open and you should see theDOCUMENT PROPERTIES tab. In the leftpane, find UNITS.


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Lets start by choosing theREVOLVE boss/base,then choose the front

planar surface.

nce aga n, e par w ro a e

around to give you a front view.

Lets begin by just drawing thegeneral shape. Click on the LINEbutton at the top.


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Fillets and Chamfers ExerciseYou should notice your centerline is black meaning it is fully

defined. Now lets define the bottom part of our sketch. Click thebottom left corner, press CTRL, click on the origin, then in

property manager choose horizontal and they will line up.

We are now ready to dimension our sketch. Choose SMART DIMENSION.


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Set the diameter to 60.You may notice someoverlap with the far left

vertical line and that isbecause we have yet todimension it to the

centerline. Dimensionthat line with a diameterof 20 as shown.


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Complete the rest of thedimensioning. Keep inmind you dimension the

vertical lines to thecenterline, then move

ast to make a diameter

setting. Once finishedyou will see you areFULLY DEFINED at thebottom.


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Fillets and Chamfers ExerciseExit the sketch and notice

that it automaticallyrevolves the sketch for

you around thecenterline.

Click OK in propertymanager and the finalpart will be shown.


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