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Drawing Layout: Creating and Positioning Views in PRO/Engineer, Notas de aula de Desenho Técnico

A step-by-step tutorial on creating a drawing layout in pro/engineer, covering the process of creating a drawing sheet, positioning views, and adding cross-sections. It also discusses the importance of view orientation and the addition of a drawing format.

Tipologia: Notas de aula

Antes de 2010

Compartilhado em 21/03/2009

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Drawing Layout
By D Cheshire Page 1 of 4
Creation of drawings from PRO/Engineer models is a straightforward task.
Completing a drawing can be broken down into two stages:-
1. Drawing Layout - Elements making up a drawing are brought
together. These include selecting a drawing sheet, positioning
views of your model on the sheet, adding cross-section or scaled
views, etc.
2. Drawing Detail - Adding information such as dimensions,
geometric tolerances and drawing notes to your drawing.
This document covers the f irst of these stages, drawing layout, the second
stage is covered in a companion document ProTutor05.
This drawing layout tutorial covers the following procedures…
Creating a drawing sheet and assigning a model to the drawing.
Positioning drawing views onto the drawing sheet. The position of
the first view of the specified model is important since it
determines the layout of other views. Subsequent views are
placed as projections of this view and PRO/Engineer automatically
determines the view orientation based on the projection mode.
Additional views can be placed which are not projections. For
example it is often useful to add a 3D view (an isometric
projection) to the drawing as this can aid visualisation of the part.
Cross-sections are also a useful tool for communicating ideas.
Cross-sections, either planar or dog legged, can be added and
numbered quite easily in PRO/Engineer.
The drawing tutorial is based on the main housing of a valve. The model
for this part can be found at the location where you found this document.
Copy the model called valve_housing to your directory before you start.
Creating a Drawing
A new drawing is created using FILE > NEW choosing the type as
DRAWING and giving a suitable name (valve_housing suggested). At this
point the drawing format definition dialog appears, as shown in Figure 1.
The default model will be set to none (unless you already have a model
open). Use the browse button to locate the model you want to create a
drawing of – in this case valve_housing.
Also from this dialog box the size of the drawing can be specified. W hen
you are choosing the size bear in mind the size of printer or plotter that is
available for the final output. If only an A4 printer is available then
choosing the A0 option is not sensible since by the time the page is shrunk
to fit on an A4 sheet the text will be unreadable. For student work it is
acceptable to choose an A3 format and plot this onto an A4 sheet as this
gives more room for dimensions to be shown. Another way of specifying
the size is to choose a Template or a Format. This is like starting with a
pre-printed drawing sheet with boxes for drawing title and other
information but we will show you how to add this in later. For this model
choose Empty, Landscape and select the A3 standard size.
Figure 1: Creating a new Drawing
A new window will be displayed in which your drawing will be created with
the file extension .DRW. If you have chosen one of the standard sheet
sizes a rectangle will be displayed indicating the extents of the drawing
sheet. All drawing should take place inside this rectangle. Figure 2 shows
the new drawing sheet, as it should appear on your screen.
Figure 2: A Drawing Sheet
pf3
pf4

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Drawing Layout

By D Cheshire

Page 1 of 4

Creation of drawings from PRO/Engineer models is a straightforward task.Completing a drawing can be broken down into two stages:-

  1. Drawing Layout - Elements making up a drawing are broughttogether.

These include

selecting a

drawing sheet, positioning

views of your model on the sheet, adding cross-section or scaledviews, etc.2. Drawing

Detail

-^

Adding

information

such

as

dimensions,

geometric tolerances and drawing notes to your drawing. This document covers the first of these stages, drawing layout, the secondstage is covered in a companion document ProTutor05.This drawing layout tutorial covers the following procedures…

-^ Creating a drawing sheet and assigning a model to the drawing. •^ Positioning drawing views onto the drawing sheet. The position ofthe

first

view

of^

the^

specified

model

is^

important

since

it

determines

the

layout

of^

other

views.

Subsequent

views

are

placed as projections of this view and PRO/Engineer automaticallydetermines the view orientation based on the projection mode. • Additional views can be placed which are not projections. Forexample

it^

is^ often

useful

to^

add^

a^ 3D

view

(an

isometric

projection) to the drawing as this can aid visualisation of the part. • Cross-sections are also a useful tool for communicating ideas.Cross-sections, either planar or dog legged, can be added andnumbered quite easily in PRO/Engineer. The drawing tutorial is based on the main housing of a valve. The modelfor this part can be found at the location where you found this document.Copy the model called

valve_housing

to your directory before you start.

Creating a Drawing A^ new

drawing

is^

created

using

FILE

>^

NEW

choosing

the

type

as

DRAWING and giving a suitable name (

valve_housing

suggested). At this

point the drawing format definition dialog appears, as shown in Figure 1.The default model will be set to none (unless you already have a modelopen). Use the browse button to locate the model you want to create adrawing of – in this case valve_housing.Also from this dialog box the size of the drawing can be specified. Whenyou are choosing the size bear in mind the size of printer or plotter that isavailable

for

the

final

output.

If^

only

an^

A^

printer

is^

available

then

choosing the A0 option is not sensible since by the time the page is shrunkto fit on an A4 sheet the text will be unreadable. For student work it isacceptable to choose an A3 format and plot this onto an A4 sheet as thisgives more room for dimensions to be shown. Another way of specifyingthe size is to choose a Template or a Format. This is like starting with apre-printed

drawing

sheet

with

boxes

for

drawing

title

and

other

information but we will show you how to add this in later. For this modelchoose Empty, Landscape

and select the A3 standard size. Figure 1: Creating a new Drawing

A new window will be displayed in which your drawing will be created withthe file extension .DRW. If you have chosen one of the standard sheetsizes a rectangle will be displayed indicating the extents of the drawingsheet. All drawing should take place inside this rectangle. Figure 2 showsthe new drawing sheet, as it should appear on your screen.

Figure 2: A Drawing Sheet

Drawing Layout

By D Cheshire

Page 2 of 4

To position the first view of your model choose INSERT > DRAWINGVIEW > GENERAL (if by mistake you left the model name as none in theoriginal dialog box you will be asked to enter the name of the model thatyou want to detail - choose

valve_housing

). After the system has located

the model you are asked to indicate the position of the view within thedrawing. Click inside the drawing in the lower right-hand quadrant (seeFigure 3) and a default view of the housing model will be shown.Next the DRAWING VIEW dialog will appear. This dialog offers all of theoptions for setting up views.

Figure 3 : The First View is Placed and Awaiting Orientation Although the view is located on the drawing it is not correctly orientated.The VIEW ORIENTATION section of the dialog allows you to change this.If you click on GEOMETRY REFERENCES this works in the same way asorientating the display and setting up sketch planes. Choose

TOP

in

reference 1 and click on DTM2, then choose

LEFT

in reference 2 and click

on DTM3. The view should be orientated to show a side view as in Figure4. Choose OK in the DRAWING VIEW dialog. The projections from this first view can now be created. Choose INSERT >DRAWING VIEW > PROJECTION and click to the left of the first view.The view is projected from the currently selected view so click on the firstview you created (a red box should highlight around the view) then repeatthe process to add a third view this time clicking above the first view. Youshould now have three projected views on the drawing.

Figure 4 : The First View is Orientated

To complete the views choose INSERT > DRAWING VIEW > GENERALagain. Locate the view in the top-left quadrant and accept the defaultorientation by pressing OK in the DRAWING VIEW dialog. Note : If you want some isometric view other than the default it is best toopen the model and using the dynamic rotation option using the middlemouse button set up the view that you want and save it under a nameusing the ORIENT tab in the VIEW > VIEW MANAGER

dialog.

The drawing should now look like Figure 5. If any of the views are incorrectclick on the view to highlight it with a red outline then choose EDIT >DELETE. You will be asked to confirm removal then you can add it again.

Figure 5: Four Views Positioned

Click here to^ position the^ view

Drawing Layout

By D Cheshire

Page 4 of 4

To fit the views onto the sheet Pro Engineer has chosen an overall scale.The text in the bottom left of the graphics window tells you what the scaleis^ (probably

in^

this^

case).

You

can

change

this

to^

increase

or

decrease the size of all of the views giving you more or less room fordimensions to be added. Simply double click on the scale text at thebottom left and type in a new value – try 0.5 in this case to make the viewssmaller.

Figure 8: Resized Layout

At the start of the drawing process we said we would show you how to adda drawing format (information boxes etc.) to your drawing so here is howto do it. Choose FILE > PAGE SETUP and you will see the dialog inFigure 9. It shows you that you already have a format in the drawing calledA3Size. This is the rectangle bounding the drawing area. Click on this andBrowse to change it to b.frm (the standard formats distributed with ProEngineer are only in American sizes where ‘B’ is the nearest to A3). ClickOK and you should see the format sheet around your drawing.

Figure 9 : Page Setup Dialog

The^

format

has

boxes

where

you

can

fill^

in^ your

name

and

other

information. To do this choose INSERT > NOTE choose the options fromthe menu and then choose MAKE NOTE and click to position your textthen type in the text you want to appear. Press RETURN twice to end textentry.

Figure 10 : Drawing with Format

Review So what should you have learnt?

•^

How to create a drawing.

-^

How to create general, projection and sections views.

-^

How to reposition views.

-^

How to add a drawing format.

Any problems with these? Then you should go back through the tutorial –perhaps several times – until you can complete it without any help. What Next? You need to experiment with creating drawings of your own parts perhapsinvestigating how to do scaled views.Now you know how to layout the drawing it would be good to move on toannotating the drawing with dimensions and other information. This iscovered in the next tutorial.