Intermediate Modelling

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Document No : ProTutor02

Title : Intermediate Modelling In ProEngineer

Author : D Cheshire

Email : [email protected]

Prere!uisites : ProTutor0"

#elated Docs :

ProE $ersion : 2"

Print Date : "2%0&%"'

Before starting this tutorial document you should have completed and fully understood

document ProTutor01. If this is not the case please complete this document now. Many ofthe concepts used in this tutorial were introduced in document ProTutor01 and will not be

fully explained again here. ew concepts will be fully explained. These new concepts

include several new features and feature creation methods.

Perhaps the most important of these new features is datum planes. !s the word planeimplies these are flat areas that can be used as references for defining parts of your

model. In some case you can define models with out any datum planes" in other cases

they are essential. Many people choose to always have a basic set of default datum planes

defined as a starting point for their model. These default datum planes can be consideredas representing the #" $ and % directions in the model. &atum planes are displayed as

rectangles that are 'ust big enough to enclose the model. They are given names by thesystem such as &TM1. $ou will see datum planes drawn in either red or yellow. This is

to distinguish between the two sides of the datum. The yellow side is considered the

(positive) side. If you loo*ing exactly on the edge of a datum you will see two parallellines drawn representing the plane. +ne line will be yellow and one line will be red" again

indicating the sides of the datum.

Tutorial

$ou should first start Pro,ngineer and create a new part called (T)*(+A,T. -efer to

ProTutor01 if you can)t remember how to do this /reate the first feature in this part that

will be a set of default datum planes. The command for this is the insert datum iconto the right of the main window. The three datum planes will be displayed in the window

as shown inigure 1.

,igure " : Default Datum Planes

Intermediate Modelling In ProEngineerPage - "
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The datum planes will all be shown in yellow as the view direction is set to be loo*ing on

to the positive sides of the planes. ote that the datum planes were created from a

command under the feature menu and they appear in the Model Tree. They areconsidered as three separate features even though they are not (real) geometry.

The next stage of the modelling process is very similar to the previous tutorial. $ou need

to create a new solid protrusion feature by extruding a suare to form a rectangular bloc*.Because you already have features present 2the datum planes3 you will be as*ed to selecta s*etching plane. In the previous tutorial you chose the face of an existing bloc* as the

s*etching plane. ow you can choose a datum plane instead. ,nter the command to

create a new one4sided extruded protrusion feature and pic* &TM5 2clic* on the name&TM5 in the main window3 as the s*etching plane. !ccept with Okaythe direction and

choose the DEFAULT orientation. 6hen in s*etching mode you will see a suare

representing &TM5 and red and yellow vertical lines for &TM1 and hori7ontal lines for&TM8. $ou are loo*ing onto the edge of &TM1 and &TM8.

&TM1 and &TM8 will be automatically selected as the dimensioning references for you

so /9+:, the dialog box. :*etch a suare eually spaced around the centre of the datum

planes. otice the dimensions that are added to the sides of the suare to fix the si7e andtwo dimensions to locate the suare relative to the datum planes. $ou will remember

from ProTutor01 that we originally created a rectangular bloc* as the first feature without

these locating dimensions. 9ocation dimensions are needed because this is not the first

feature 2the datum planes were the first feature3.

,igure 2 : The ,irst (etch

Modify the dimensions to the values shown in igure 5. :*etcher has some intelligence

built into it in the form of rules that are described in Table 1. $ou may have noticed this

intelligence in operation with the letter , exercise in ProTutor01. +ne of these rules states

that (segments of un*nown length are assigned a length eual to that of a *nown segmentof approximately the same length). This rule has been useful to us in this case. The two

sides of the suare have been recognised as being eual in length because we drew themwith very similar length. 2If you did not draw them similar lengths you will have an extra

dimension. $ou can tell Pro,ngineer to ma*e them both eual by adding an extra

constraint. ;se the s*etcher constraint icon and press the eual button and clic*

on the two lines you want to ma*e eual in length. 9ine eual in length will be indicated

Intermediate Modelling In ProEngineerPage - 2

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by a small 91 symbol. Try it3 ow change the >0 to ?0 and note that the suare will

remain a suare capturing the designer)s intent. $ou cannot do the same with the 5>

values since they do not specify the length of a line 4 they specify a gap. /hange the ?0bac* to >0 and end the s*etch. /hoose aBLINDextrusion of 1>.

A(()MPTIN DE(C#IPTIN,ual radius@diameter If two or more arcs or circles are s*etched with approximately the

same radius" they are assigned the same radius.

:ymmetry ,ntities s*etched symmetrically about a centreline are assigned eual

values with respect to the centreline.


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,igure & : (etch ,or The (tu/ (haft

ow SKETCH a RECTANGLE that represents half of the shaft. The left4hand edge of

the rectangle should be inline with &TM1 and the bottom edge of the rectangle should be

inline with the top of the bloc*. Two dimensions are automatically added" one for thewidth of the rectangle that can later be modified to 10" the second the distance from the

top line of the rectangle to &TM5 which can later be modified to 80. :ince this is a

revolve feature you need to add another line to represent the centreline of rotation.

/hoose the centre line tool and clic* near the bottom and top of the vertical referenceline. Modify the dimensions and end the s*etch. To complete the creation of the solid"

choose a rotation angle of 80 for a full shaft. The model should loo* li*e igure C.

,igure ' : (olid 1ie of the (haft

ow for some more new features. 9ets add chamfers to the vertical edges of the suare

bloc*. FEATURE CREATE SOLID CHAMFER EDGE 45 x . ,nter a

distance of > for the chamfers and then pic* the four edges to be chamfered. It will be

easy to pic* three of the edges. The fourth edge will be hidden behind the bloc* so to pic*

it you will need to use the uery select techniue. /hoose UERY SEL from the lastmenu and point onto the grey line of the fourth edge. The edge should highlight. /hoose

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ACCEPTfrom the menu. If some other geometry highlights chooseNE"Tuntil the edge

you want does highlight then chooseACCEPT. This techniue is extremely useful for D4

:electing geometry hidden behind a solid.

,nsuring you choose the correct geometry on a crowded screen.

-emember this techniue" as it will be useful to you in the future. 6hen you have thefour edges highlighted choose DONE SEL and DONE REFS and finally +E in the

/

,igure 3 : (haft 4ith Chamfers

! similar feature is *nown as a round in Pro,ngineer. 9ets add rounds to this model.

/hoose FEATURE CREATE SOLID ROUND SIMPLE | DONE

CONSTANT | EDGE CHAIN | DONEand pic* the edges to be rounded F in this case

the top and bottom circle of the cylindrical shaft. 6hen both are pic*ed choose DONEand type in a value of > for the radius. /lic* +E in the -+;& D =eneral dialog box to

complete the feature.

,igure 5 : (haft 4ith #ounds

The next feature is not new but has a new option for you. 6e will ma*e a slot in the top

of the shaft using an extruded cut. 6e will choose &TM8 as the s*etching plane" which

passes through the centre of the shaft. Previously all the cuts have gone in one direction"one side of the s*etching plane. This cut needs to go BOTH SIDES of the s*etching

plane. !ccept the default orientation. !dd an additional reference to the two suggested by


!$+;/!!9:+/

+!M+&,9.


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clic*ing on the flat top of the shaft and s*etch a rectangle for the cut. Modify the

dimension values and finish the s*etch. The arrow indicating material removal should

point into the rectangle and choose THRU ALL | DONE for both of the cuttingdirections. inally choose +E from the /;T D ,xtrude dialog box.

,igure 6 : The (etch and Comleted Cut

inally in this tutorial we will return to datum planes. The default datum planes havebeen used throughout the creation of the model. :ometimes additional datum planes need

to be created as part of the modelling procedure. to the slot.The obvious way to do this is to extrude a circle" but because of the angle involved what

are we going to s*etch ontoG There is no suitable plane so we must ma*e one. There are

two ways of doing thisD4

/reate a datum plane feature in the correct place and then create the extrusion.

/reate an extrusion and as part of the extrusion process ma*e a new datum

plane.

In the first case the datum will reside in the partand so will be available to be used latter

in the modelling process for other features. In the second case the datum will reside in the

featureand will not be available to be used again but will not clutter the model withadditional datum planes. 6e will show you both methods here.

Method 1

:tart by creating a new plane using FEATURE CREATE DATUM PLANE.

$ou will now be at the plane creation menu. This menu gives lots of ways of defining a

plane. Table 5describes the valid combinations of constraints. irst choose THROUGHand pic* on the axis of the shaft 2the dotted line3 and then choose ANGLE and pic*&TM8 from which to define the angle. :ince these two options fully define a plane all

other options are now greyed out so chooseDONEandENTER VALUEand type in C>.

The new plane called &TMC should appear.

ow create the boss by extruding a circle from &TMC. /hooseFEATURE CREATE

SOLID PROTRUSION E"TRUDE | SOLID | DONEONE SIDE | DONE

and pic* &TMC as the s*etching plane. The TOPplane should be &TM5. :*etch a circle



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aligned to the central axis and dimensioned from the top of the bloc* 2you will need to

pic* references as none are suggested3 as shown in igure ?. ,nd the s*etch then choose

BLIND | DONEand enter a distance of 15.>.

,igure 7 : The (etch and Comleted *oss

Method 5

9et)s ma*e a second boss. This time start by creating the extrusion. /hoose FEATURE

CREATESOLID PROTRUSION E"TRUDE | SOLID | DONEONE

SIDE | DONE. ow we need to specify the s*etching plane" which doesn)t exist" so

chooseMAKE DATUM. The now familiar plane4defining menu appears. /hoose similar

options to last time. irst choose THROUGHand pic* on the axis of the shaft 2the dottedline3 and then chooseANGLEand pic* &TM1 from which to define the angle.

:ince these two options fully define a plane all other options are now greyed out so

chooseDONEandENTER VALUEand type in C>. The new plane called &TM> should

appear and this will be used as the s*etching plane. The TOPplane should be &TM5.

:*etch a circle aligned to the central axis and dimensioned from the top of the bloc* 2youwill need to pic* references as none are suggested3 as shown in igure A. ,nd the s*etch

then chooseBLIND | DONEand enter a distance of 15.>.

,igure 8 : The (etch and (econd *oss



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!pparently the result of these two methods is identical. The only difference is that &TMC

is displayed whereas &TM> is not. !lso &TMC appears in the model tree and &TM>

does not. &TMC can be used for subseuent features &TM> cannot.

6hich of these two methods you choose depends on the situation. If in doubt use method

1 as it is most flexible.

DAT)M P9ANE

CN(T#AINT

CM*INATIN(

Through ormal Parallel !ngle Tangent

!xis,dge/urve

Point@Hertex

/ylinder

Plane Plane Plane /ylinder

:tand

!lone

/onstraint

Through

!xis,dge/urve Ponit@Hertex Plane /ylinder

ormal!xis,dge/urve Plane

Parallel Plane +ffset

Plane /oord :ystem

!ngle Plane Tangent /ylinder Blend

:ection

Ta/le 2 : Datum Plane Constraint Com/inations



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,xercise 1

Model the parts shown in igure 10.;se your 'udgement to estimate suitable dimensions.

,igure "0 : Additional Models

,xercise 5

Model the more complex part shown in igure 11. It can be made by a combination ofprotrusions and cuts made from extruding or revolving s*etches. Thin* carefully about

the order that you create the features in so that you can complete the model with your

limited *nowledge. ;se your 'udgement to estimate suitable dimensions.

,igure "" : A More Comle Eercise


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Intermediate Modelling