Robotics - Solid Works i

8/2/2019 Robotics - Solid Works i

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SOLIDWORKS: Lesson 1 -

Basics and Modeling

Fundamentals

Introduction to Robotics


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SolidWorks

SolidWorks is a 3D solid modeling packagewhich allows users to develop full solidmodels in a simulated environment for both

design and analysis.

In SolidWorks, you sketch ideas and

experiment with different designs to create3D models.


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SolidWorks

SolidWorks is used by students, designers,engineers, and other professionals toproduce simple and complex parts,

assemblies, and drawings.

Designing in a modeling package such as

SolidWorks is beneficial because it savestime, effort, and money that would otherwisebe spent prototyping the design.


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SolidWorks Components - PARTSBefore we begin looking at the software, it is important

to understand the different components that makeup a SolidWorks model.

The first, and most basic element of a SolidWorks model is

a Part.

Parts consist of primitive geometry and features such asextrudes, revolutions, lofts, sweeps, etc.

Parts will be the building blocks for all of the models thatyou will create


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SolidWorks Components - Assemblies

The second component is the assembly.Assemblies are collections of parts which areassembled in a particular fashion using

mates (constraints).

Any complex model will usually consist of

one, or many assemblies.


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SolidWorks Components - DRAWINGS

The third, and final component inSolidWorks is the Drawing.

A drawing is the typical way to represent a3D model such that any engineer (ormanufacturer) can recreate your part.

Drawings are important because they providea standard way of sharing your design.


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SolidWorksLets Begin

By default, no file is openedautomatically when youstart the program.

To create a new file, click

on File > New or click theNew File icon in the maintoolbar.

This will open the NewSolidWorks Documentwizard.


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SolidWorks Tour


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SolidWorks Tour

Lets begin by creatinga new part. To do this,click on Part, then OK

Once you do this, youwill be brought into themodeling view whichshould open several

toolbars and panes


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SolidWorks TourThere are several

important parts of thescreen that needs to beidentified before wecontinue.

First, the left side of thescreen consists ofseveral tabbed panesthat provide veryimportant informationregarding your model.


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SolidWorks Tour

The first tab, called theFeature Manager, lists allfeatures that have beencreated within your model.

This tab is extremelyimportant as it will be fromhere that you select andchange features once they

have been created.


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SolidWorks Tour

The second tab, called theProperty Manager, allowsyou to adjust the propertiesof various entities eitherduring construction, oronce it has been created.

Note that generally you willnot need to manually

change the tab on themanager window


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SolidWorks Tour

The third tab is called the

Configuration Manager and isused to set up different viewconfigurations such asexploded views or 3D section

views.

Usually this will be used oncethe part has been created andyou wish to set up specific

configurations forvisualization.


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SolidWorks Tour

There may also be other tabsvisible in the managerwindow.

Generally any time you loadan additional SolidWorksmodule (such as PhotoWorks,COSMOS Motion, COSMOS

Works, etc.) it will create anew tab in this window.


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SolidWorks Tour

The next important feature of the interface isthe dynamic Toolbar

The dynamic Toolbar provides access to themost relevant, and frequently use commandsin SolidWorks


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SolidWorks Tour

The last part of the interface

which should be noted is the TaskPane on the right side of thescreen.

Using the Task Pane you canview content specific tasks suchas importing standard geometry,file explorer, view palette, as well

as any plug-in specificinformation.


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SolidWorks Tour The last thing that needs to be shown is how to open the

SolidWorks tutorials.

They can be accessed by going to Help > SolidWorks Tutorials.

The tutorials are very helpful and cover from the most basicfeatures to more advanced analysis and assemblies


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SolidWorks Exercise

Now that we have explored the interface ofSolidWorks, lets create a simple part step-by-step.

For now, we are only going to concernourselves with one type of feature: Extruded

Boss/Base.


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SolidWorks ExerciseWhat is Extrude?

Extrude When you take a 2Darea and push the designout into another dimension.A 2D area, for example, can

be made into a 3D volumeby extruding it out a specificdistance, d.

You can extrude to make aSOLID or you can extrudeto make a CUT


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SolidWorks Exercise

There are MANY ways to EXTRUDE a surface

We could make thisrectangle and EXTRUDE itDOWN or UP

You could EXTRUDE thisrectangle and pull it tothe left or right

Lets begin. Choose FILE, then NEW PART


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SolidWorks ExerciseWe wish to model the following part:

This is a basic 3 inch bar used oftentime to mount our wheels to ourmotors. It is obviously 3 inches long,yet 0.125 inches in width.

How do we make sure we use

the correct UNITS?


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SolidWorks ExerciseIn feature manager, RIGHT CLICK on PART1,then choose DOCUMENT PROPERTIES.

Always remember to do this FIRST whenmaking a new part.

Click on UNITS, thenchoose IPS forinches.

Then choose OK


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SolidWorks Exercise

Lets begin by selecting

EXTRUDED Boss Base

You should notice that your tab will change toproperty manager asking you to select a plane from

the view.


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SolidWorks ExerciseGo ahead and select the

horizontal plane shown.

You should notice several things happen.

1. You switch to feature manager2. You have sketch buttons on the dynamic toolbar3. You view below is shown as TOP VIEW! You are

looking down on top of the part.


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SolidWorks Exercise

Click on Rectangle. Youshould see your cursorchange to a rectangle with apencil which means you aresketching.

Make a rectangle by dragging themouse from one corner of thescreen to the other. The size

does not matter at this point.

Click the GREEN CHECK inFEATURE MANAGER whencomplete.


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SolidWorks Exercise

If you hit escape, it will get youout of the rectangle TOOLand back to a normalcursor.

We need DIMENSIONS to ourrectangle however.

At the bottom right of your screen you will see the figure above.Obviously, we are in the middle of our sketch but it also says, Under

Defined. This means that there are parts of the sketch that are not

defined according to location.


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SolidWorks Exercise

Click the bottom right point onthe rectangle.

You should be able to movethis point around as itslocation is NOT defined.

This point has degrees offreedom and is NOTconstrained.


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SolidWorks Exercise Lets save our work!Click on the small box next to the far right

vertical line. Notice this box turns pink whenclicked and that it has a vertical line in it.This means that this line is vertical and whenyou click on it you can move it left or right.The vertical lines can thus be moved up ordown.

Press the DELETE button, then click on thetop right point. Notice the line is not definedas a vertical line anymore and the degreesof freedom are extended.

The horizontal line still moves up or down,but notice the vertical line can be moved inany direction as you deleted the relationship.


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SolidWorks Exercise

You can add relations byclicking on a line, turnsgreen.

Line properties will appear andyou can click on theVERTICAL button on theADD RELATIONS windowsto constrain the line to just

the vertical direction.


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SolidWorks Exercise

Click on the RIGHT vertical line, then hold downthe CTRL button. Click the left vertical line. Youshould see a list of available relations that youcan add to BOTH line. Lets choose EQUAL and

VERTICAL. Click the green check when finished.

Do the same thing for the top and bottomhorizontal line, except add a horizontal relation.


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SolidWorks Exercise

You should see tiny green boxes

next to the lines. If you place yourmouse over them it will tell youwhat relation that element has.

Unfortunately, our design is still bluewhich means we are still UNDERDEFINED. In fact, we need to fix ourdesign to the origin in some way.Depending on what design aspect comelater it is often desired to fix the origin at

the CENTER of the design. RIGHTCLICK on the bottom horizontal line andchoose SELECT MIDPOINT. Hold downCTRL and select the ORIGIN. Add avertical relation.

Do the same thing for the sidesby adding a horizontal relation tothe origin.


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SolidWorks ExerciseNow we want to add specific

dimensions to our drawing. Choose

SMART DIMENSION on thedynamic toolbar.

Click the bottom horizontal line ofour rectangle and drag thedimension down.

You can change the length of the line by using the slider bar or you cansimply enter in 3 inches in the box shown. Enter the value 3 then clickthe green check. If the box is way too big or small, press f on the

keyboard to fit.


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SolidWorks ExerciseNow using Smart

Dimension again letsdimension the leftvertical line..

Modify the Length to be

0.125 units as shown inthe original drawing.

Hit f on the keyboard to view the design

better


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SolidWorks ExerciseNotice that after you added relationsand added dimensions the design colorturned black. This means it is FULLYDEFINED. ONLY after seeing this canwe then EXTRUDE.

Click in the top right corner toEXIT the SKETCH.

If you hit EXTRUDE earlier, the part willautomatically become 3D. If not, click on thepart in feature manager then clickEXTRUDE BOSS/BASE at the top.


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SolidWorks ExerciseAfter EXTRUDE was chose, the PROPERTYMANAGER should have opened. In the BOX,D1 it is asking for a width distance. Since the

width and thickness are the same we will enter0.125 in. Click the green check to finish andview the finished part.


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SolidWorks Exercise

To ZOOM you can use the mouse wheel orhit the Shift button and move mouse

To ROTATE, press in the mouse wheel and

hold.

To PAN you use the Ctrl button and movemouse

To fit a picture to a window simply press thef letter key on the keyboard to FIT.


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Mechanical Drawings

So far we have been dealing with creating partsand assemblies in SolidWorks, however,when you go to get a part machined, you will

need to create a mechanical drawing of eachof your parts (and assemblies).

Mechanical drawings are important because

they allow those who are technically trainedto reconstruct your 3D geometry from 2Ddrawings.


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Drawings in Solidworks

Fortunately, SolidWorks makes it very easy forus to create drawings from a part orassembly file.

In fact, if built properly, SolidWorks will alsodimension the entire part and assembly for

ussomething that saves a lot of time!


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Drawings in SolidworksOnce we open or finish the part, we choose

make drawing from part from the file menuat the top which will automatically create adrawing file from our part:

Lets do this! If it asksyou to save then saveyour file.


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Drawing Format

At first you see severaldifferent formats thatare set up for you.Choose A-Landscape.


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However, before we can begin placing views, it

is important to set our projection style to ThirdAngle (in order to have the projectionsbehave as we expect)

To do this, right click anywhere on the sheetand click on Properties (or you can right click

on the sheet in the Feature Manager)


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Drawings in SolidworksThis will open the Sheet Properties window:


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Drawings in SolidworksOpen up the palette on the RIGHT

side menu

Click and HOLD the view you wantand drag it into the drawing field.

Choose the FRONT view and drag itto the bottom right of the drawingfield.


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Drawings in SolidworksAs soon as the front view is in positionmove the mouse UPWARD. You willsee another design, this is actually theTOP view. Click to place the top viewthen return to the front view and movethe mouse sideways. Repeat, then godiagonal.

Click the green check when finished.


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You should now see 4 views (front, top, side, & isometric).


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Click on theISOMETRIC view, thenchoose SHADED WITHEDGES under DISPLAYSTYLE on the left. Indrawings, we always

shade in theISOMETRIC view


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Drawings in SolidworksClick on the FRONT VIEW, then within

the ANNOTATIONS tab at the top clickon MODEL ITEMS.

Under source/destination choose ,entire model from the drop down

menu. Then check the box, import items

into all views. Dimensions will then beadded to the drawing. If you dont see

dimensions on each view, try addingthem separately.


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Save the drawing,then print it out.Write your name inthe title block in thebottom right.

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Robotics - Solid Works i