Creating Swept Features · Use variational sweep with wireframe3 of 7 Sketch on path. Sketch On...

Creating Swept FeaturesI-DEAS Tutorials: Fundamental Skills

Learn how to:

• create a swept part or feature• use variational sweep with wireframe• use variational sweep with part edges

2

Before you begin...

Prerequisite tutorials:

1. Getting Started (I-DEAS Multimedia Training)

–or–

Quick Tips to Using I-DEAS–and–Creating Parts

2. Sketching and Constraining

3. Using Sections and Sketch Planes

4. Extruding and Revolving Features

5. Adding Fillet, Shell, and Draft Features

3

Setup 1 of 2

If you didn’t start I-DEAS with a new (empty) model file,open a new one now and give it a unique name.

FileOpen

Open Model File form

Model File name: any unique name

OK

Make sure you’re in the following application and task:

Design, Manufacturing, or Simulation

Master ModelerSet your units to mm.

OptionsUnits

mm (milli newton)

4

Setup 2 of 2

Save your model file. File

Save

Warning! If you are prompted by I-DEAS to save your model file,respond:

NoSave only when the tutorial instructions tell you to––notwhen I-DEAS prompts for a save.

If you make a mistake at any time between saves andcan’t recover, you can reopen your model file to the lastsave and start over from that point.

Hint To reopen your model file to the previous save, pressControl-z.

5

Create a swept part or feature 1 of 8

A swept feature requires one or more cross sections anda path curve.

The path can be part edges, wireframe curves, orreference curves. It must be a continuous, tangent curve(no discontinuities in the slope of the curve).

The cross sections can also be part faces or wireframesections. Options you need to consider are how thesections are located on the path, and how they arerotated to align with the path. The pop-up menu SweepOptions... controls whether the sections are used inplace or moved to the path.

Options on the Surface Options form control how thesections follow the path, and allow you to move androtate a coordinate system defining the sectionorientation.

6


Sketch a section and a path as shown. (Avoid anyconstraints and dimensions between the two.)

Make the radius of the path larger than the “T” section soit won’t fold over on itself as it sweeps around the radius.

Recovery Point

FileSave

7


Sweep the “T” section along the path.

1

2

1

2

8


Create Surface form

Use the preview icon before you pickOK to get an idea of what the partwill look like.

OK

Result

Things to notice This may not be what you expected. The orientation ofthe section is defined by a coordinate system triad,which you can modify.

Z is the direction along the path, and X and Y are theorientation on the plane perpendicular to the path.

Let’s modify the swept part you just created.

12

9


pick anywhere on part

Feature Parameters

Surface Options form

pick Move icon from form

1 pick anywhere on triad

Y axis

2

Yes

Done


OK

10


Result

Maybe you want the rib on the bottom. In the next step,you’ll modify the triad again, this time in the direction ofthe X axis.


Feature Parameters

1

2

3

11



1 pick anywhere on triad

X axis

2

Yes (if arrow pointing down)

Origin

3

Done


OK

12


Result

To start the next section with nothing on your workbench,name and put the part away if you want to keep it, or justdelete it and continue to the next page.

After you delete or put away your part, save your file.

Recovery Point

FileSave

13

Use variational sweep with wireframe1 of 7

Variational sweep allows the section to vary along thepath, following the path and other rails. One curve isused as the path, and others can be used as rails todrive the section. These can be part edges or referencecurves.

14


Sketch a line and an arc similar to those shown. Don’tworry about dimensions.

Create reference curves of all wireframe curves. Switchto isometric view.

All

Recovery Point

FileSave

15


Sketch on path.

Sketch On Path

1 pick path

2 pick point

1

2

16


Sketch a shape as shown. It’s okay if your dimensionsare different.

Use the Intersect option to create points where thecurrent rail intersects the sketch plane.

Intersect

1

Pick points 2 through 7 starting and ending the sketch atthe intersect points.

1

2

3

4

5

6

7

Dimension the shape so the two flanges will remaina constant width, but leave the center widthundefined, to be driven by the distance between therail and the path.

17


Do a variational sweep along the path.

Section Options...

Planar sections only

Autochain

OK1 pick line

(Done)

2 pick cross-section

(Done)

1

2

Create Surface form

OK

18


Result

Optional Now, shell the part.


(Done)

Shell form

Thickness: 1

OK

19


Result

Use dynamic viewing to rotate the part to see theresults of the Shell command.

To start the next section with nothing on your workbench,name and put the part away if you want to keep it, or justdelete it and continue to the next page.

20

Use variational sweep with part edges1 of 7

Either Sweep or Variational Sweep can use part edgesas the sweep path.

Variational Sweep is more general since the sweptsection can be sketched and constrained to multiplepaths. It is also often easier to define the orientation ofthe sweep section by defining constraints to existing partgeometry rather than by using the orientation options asyou did in the first sweep example.

In this next example, you will sweep a simple “lip” on anopen shelled box.

21


Sketch a rectangle, fillet the corners, then extrude,accepting all defaults. Don’t worry about dimensions.

Round corners are used so the sweep can follow theentire perimeter.

1

2

Recovery Point

FileSave

1

22


Shell the part. Make sure the thickness is less than thecorner radius.


(Done)

Shell form

Thickness: 2

pick Delete Surface icon on form

1 pick front face

(Done)

OK

Recovery Point

FileSave

23


Sketch on path.

Sketch On Path

1

2

24


Sketch a circle, centered on the intersection of the pathand the sketch plane.

1 2

Options...

Radius: 31 locate center (pick on intersect point)

(to deactivate icon)

1

25


Sweep the circle around the perimeter to form the “lip.”

Edge Chaining ON

Select only if the menu says Edge Chaining ON. If themenu has Edge Chaining OFF, move the mouse pointeroff the menu without selecting anything.

Why: Edge chaining causes the program toautomatically chain around tangent edges of parts.Note: This is similar to, but not the same as,autochaining which applies only to wireframe selection.

1 pick path

(Done)

Section Options...

Stop at intersections2 pick circle

(Done)

21

26


Create Surface form

Protrude

OK

Result

27

On your own... 1 of 3

Create a paper clip like the one shown.

Try this on your own. You should be able to do this withthe skills learned in this and previous tutorials.

If you need help, refer to the next few pages, which giveyou hints on how to create the part shown. If you wouldrather wait and try this later, skip to the last page forwrap-up instructions.

28


Step 1. Sketch 4 lines.

Step 2. Add three 2D fillets as shown.

29


Step 3. Draw a circle above the existing sketch.

Step 4. Sweep the circle over the path.

30

Tutorial wrap-up

You have completed the Creating Swept Featurestutorial.

Delete or put away the part. This part is not used in anyother tutorials.

See also...For additional information on many of the conceptscovered in this tutorial, see the following in the I-DEASHelp facility:

Help, Manuals, Table of Contents

Design User’s GuideDesign Concepts

Modeling PartsSurface Creation Help, On Context

What’s next?After exiting, choose the Fundamental Skills tutorial thatis next in the learning path you are following.

To exit this tutorial, select: File

Exit

Warning! Do not use the menu in the I-DEAS Icons window to exit.Use the menu in the Acrobat Reader window.

I-DEAS Master Series � Online Tutorials

#,-7 320-2) -2*361%8-32 '328)28� -7 0-')27)( 83 8,) 97)6 *36 8,) 4)6-3( 7)8 *368, -2 8,) %440-'%&0) 0-')27)

%+6))1)28� 79&.)'8 83 8)61-2%8-32 3* 8,) 0-')27) &= "869'896%0 �=2%1-'7 !)7)%6', �36436%8-32 �"�!� �%8 %2= 8-1)� %2( %8 %00 8-1)7 6)1%-27 8,) -28)00)'89%0 4634)68= 3* "�!�� #,) -2*361%8-32 '328%-2)(

,)6)-2 -7 '32*-()28-%0 83 "�!� %2( 7,%00 238 &) '34-)( 36 6)463(9')( -2 %2= *361 ;,%873):)6� 236 &)

(-7'037)( 83 %2=32) 38,)6 8,%2 %2 %98,36->)( 6)46)7)28%8-:) 3* 8,) 97)6�7 )1403=)6 ;,3 -7 '3286%'89%00=

3&0-+%8)( 238 83 (-7'037) 7%1)� ;-8,398 )<46)77 46-36 ;6-88)2 '327)28 3* "�!�� #,) 97)6 3* 8,-7 89836-%0

%2( 8,) '31498)6 463+6%1�7� 6)*)66)( 83 ,)6)-2 6)8%-27 *900 '328630 3:)6 %2( -7 730)0= 6)74327-&0) *36 8,)

1)',%2-'%0 ()7-+2 3* 8,) 97)6�7 )59-41)28� 1%',-2)6=� 7=78)17� %2( 463(9'87� "�!� 1%/)7 23

;%66%28-)7 3* %2= /-2(� -2'09(-2+ 8,) ;%66%28= 3* 1)6',%28%&-0-8= 36 *-82)77 *36 % 4%68-'90%6 496437) -2

6)74)'8 83 8,) )59-41)28� 1%',-2)6=� 7=78)17� %2( 463(9'87 ()6-:)( 36 6)7908-2+ ,)6)92()6� %2( 8,) 97)6

%7791)7 %00 6-7/7 %2( 0-%&-0-8= *36 6)79087 3&8%-2)( &= 8,) 1%29*%'896-2+� 97) 36 -140)1)28%8-32 3* 8,)

'31498)6 463+6%1�7� ()7'6-&)( ,)6)-2� ;,)8,)6 97)( 7-2+0= 36 -2 '31&-2%8-32 ;-8, 38,)6 ()7-+27 36

463(9'87� "�!� 7,%00 238 &) 0-%&0) *36 %2= 74)'-%0 36 '327)59)28-%0 (%1%+)7� "�!� 1%/)7 23 ;%66%28=

8,%8 8,) )59-41)28� 1%',-2)6=� 7=78)17� %2( 463(9'87 ()6-:)( 36 6)7908-2+ ,)6)92()6 ;-00 238 -2*6-2+)

8,) '0%-17 3* (31)78-' 36 *36)-+2 4%8)287 %2( *968,)6 (3)7 238 ;%66%28 %+%-278 -2*6-2+)1)28 &= 6)%732 3*

8,) 97) 8,)6)3* -2 '31&-2%8-32 ;-8, 38,)6 ()7-+2� 463(9'87� 36 1%8)6-%07 36 -2 8,) 34)6%8-32 3* %2=

463')77� $7)67 7,%00 4638)'8� -2()12-*= %2( ,30( ,%610)77 "�!� 3* %2( *631 %2= 0377� '378� (%1%+) 36

)<4)27) %6-7-2+ *631 %2= '0%-1 8,%8 -7 -2 %2= ;%= %773'-%8)( ;-8, 8,) '31498)6 463+6%1�7� ()7'6-&)( -2

8,-7 89836-%0� �%8% 46)7)28)( -2 )<%140)7 (3 238 2)')77%6-0= 6)*0)'8 %'89%0 8)78 6)79087 %2( 7,390( 238 &)

97)( %7 ()7-+2 '6-8)6-%�

�= %'')48%2') 3* �?��" �%78)6 ")6-)7� 8,) 97)6 %+6))7 83 8,) %&3:) '32(-8-327 %2( *968,)6 %+6))7 8,%8

8,-7 -28)00)'89%0 4634)68= ;-00 238 &) )<4368)( �36 6))<4368)( *631 % '39286= 3* -278%00%8-32�� (-6)'80= 36

-2(-6)'80=� 7)4%6%8)0= 36 %7 4%68 3* % 7=78)1� ;-8,398 97)6 36 97)6�7 )1403=)6� %8 -87 3;2 '378� *-678

3&8%-2-2+ %00 0-')27)7 *631 8,) $2-8)( "8%8)7 �)4%681)28 3* �311)6') %2( %2= 38,)6 %446346-%8) %+)2'=

3* 8,) $2-8)( "8%8)7 +3:)621)28 %7 1%= &) 6)59-6)( &= 0%;�

"869'896%0 �=2%1-'7 !)7)%6', �36436%8-32 ��

��

�%=% �)%8 #6%27*)6 ��

�00 6-+,87 6)7)6:)(� �3 4%68 3* 8,-7 ;36/ 1%= &) 6)463(9')( 36 86%271-88)( -2 %2= *361 36 &= %2= 1)%27�

)0)'8632-' 36 1)',%2-'%0� -2'09(-2+ 4,383'34=-2+ %2( 6)'36(-2+� 36 &= %2= -2*361%8-32 7836%+) 36

6)86-):%0 7=78)1 ;-8,398 4)61-77-32 -2 ;6-8-2+ *631 "�!��

�)()6%0 �'59-7-8-327� �311)6'-%0 �31498)6 "3*8;%6)

$7) +3:)62)( &= 8)617 3* "�!��7 "3*8;%6) �-')27) %2( ")6:-') �+6))1)28�

"�!� ,%7 ;36/)( 83 :)6-*= 8,) %''96%'= 3* 8,) -2*361%8-32 '328%-2)( -2 8,-7 1%29%0 %7 3* -87

49&0-'%8-32 (%8)� ,3;):)6� 79', -2*361%8-32 -7 79&.)'8 83 ',%2+) ;-8,398 238-') %2( "�!� -7 238

6)74327-&0) *36 %2= )66367 8,%8 1%= 3''96 -2 8,-7 (3'91)28�

#,-7 73*8;%6) -7 % �-')27)( 63(9'8 3* %2( (-786-&98)( &= "�!� %2( 1%= 320= &) 97)( %''36(-2+ 83 8,)

8)617 3* 8,%8 0-')27) 32 8,) 7=78)1 -()28-*-)( -2 8,) �-')27) �+6))1)28�

��

��

��

I-DEAS, I-DEAS Master Series

�00 38,)6 86%()1%6/7 36 6)+-78)6)( 86%()1%6/7 &)032+ 83 8,)-6 6)74)'8-:) ,30()67� �00 59)78-327 36

6)59)787 7,390( &) %((6)77)( 83�

"869'896%0 �=2%1-'7 !)7)%6', �36436%8-32

�� %781%2 �6-:)

�-0*36(� �,-3 � �

� ��

Creating Swept Features · Use variational sweep with wireframe3 of 7 Sketch on path. Sketch On...

Documents

Transcript of Creating Swept Features · Use variational sweep with wireframe3 of 7 Sketch on path. Sketch On...