W A T K I N S - J O H N S O N C O M P A N Y Semiconductor Equipment Group

1
Engineering 22
SolidModeling - 2
Bruce Mayer, PE Licensed Electrical Mechanical
EngineerBMayer_at_ChabotCollege.edu
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Learning Goals

• Describe How AutoCAD SOLIDs differ from
  WireFrames and Surfaces
• Create AutoCAD Primitive Solids
• Box, Wedge, Cylinder, Sphere, etc.
• Slice and Section 3D Solids
• Use ACAD Boolean Operations to create Solids
• Interfere, Union, Subtract
• Combine Primitives to Make new Solids

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Constructive Solid Geometry (CSG)

• Standard primitive shapes
• AutoCAD has six primitives
• box, wedge, cone, cylinder, torus, sphere
• Primitives are moved into place with 3D commands
  to assemble object
• Primitive are combined with boolean commands
• union, subtract, interfere

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Recall The Primitive Solids
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Move Primitives into Position

• Make use of geometry of the object
• Object snap (Osnap)
• endpoint, midpoint, center, quadrant, etc.
• cursor menu (Shift - right click)
• Move command (2D)
• 3D commands to rotate, mirror, align, and array

6
Construct Primitives in Place

• Use Osnap to locate starting point of primitive
  on existing geometry
• Position UCS to locate starting point
• Reorient UCS to construct cylinders and wedges
• Cylinder - height in Z axis
• Wedge - point in X axis (and Z axis)

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AutoCAD Solid Model

• Create object primitives (box, cylinder, wedge,
  etc.)
• Move into place with 3D commands
• Boolean (union, subtract, Interfere) to create
  single solid
• Create object with efficient sequence of
  operations (plan ahead!!)

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EX16-24
Time For Live Demo
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EX16-24 Game Plan

• Make 13x30x35 Box
• Make Solid Cyl ? Ø30 O.D. x 13H
• Move Cyl to Top-End of Box
• Union Box Cyl
• Make Box 13x30x37
• Move new Box to Position Union

• Locate w/ xLines cen of Ø16 Hole
• Move Orient UCS at Ø16 Hole Location
• Construct Ø16 x 13H Solid Cyl
• Subtract Ø16 Cyl from Previous Construction

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EX16-24-01
Command cylinder Current wire frame density
ISOLINES18 Specify center point for base of
cylinder or Elliptical lt0,0,0gt mid of Specify
radius for base of cylinder or Diameter
d Specify diameter for base of cylinder
30 Specify height of cylinder or Center of other
end 13 Command cylinder Current wire frame
density ISOLINES18 Specify center point for
base of cylinder or Elliptical lt0,0,0gt
cen of Specify radius for base of cylinder or
Diameter d Specify diameter for base of
cylinder 13 Specify height of cylinder or
Center of other end 13

• Draw Box

• Draw 2 Cylinders

Command box Specify corner of box or CEnter
lt0,0,0gt Specify corner or Cube/Length
l Specify length 35 Specify width 30 Specify
height 13
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EX16-24-02

• Add Subtract
• UNION of BOX Lg-CYLINDER
• SUBTRACT Small-CLYINDER

• Pick Objects with Mouse

Command union Select objects 1 found Select
objects 1 found, 2 total Select
objects Command subtract Select solids and
regions to subtract from .. Select objects 1
found Select objects Select solids and regions
to subtract .. Select objects 1 found Select
objects Command
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EX16-24-03

• Make Tall Box, and Move into Position

• For Move locate corners using OSnap

Command box Specify corner of box or CEnter
lt0,0,0gt ltSnap ongt Specify corner or
Cube/Length l Specify length 30 Specify
width 13 Specify height 37 Command
m MOVE Select objects 1 found Select
objects Specify base point or Displacement
ltDisplacementgt Specify second point or ltuse
first point as displacementgt

• Pick Objects with Mouse

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EX16-24-04

• Rotate Axes with 3Pt

Command ucs Current ucs name WORLD Enter an
option New/Move/orthoGraphic/Prev/Restore/Save/De
l/Apply/?/World ltWorldgt m Specify new origin
point or Zdepthlt0,0,0gt ltOsnap ongt Command
ucs Current ucs name NO NAME Enter an option
New/Move/orthoGraphic/Prev/Restore/Save/Del/Apply
/?/World ltWorldgt n Specify origin of new UCS
or ZAxis/3point/OBject/Face/View/X/Y/Z lt0,0,0gt
3p Specify new origin point lt0,0,0gt Specify
point on positive portion of X-axis
lt1.0000,0.0000,0.0000gt Specify point on
positive-Y portion of the UCS XY plane
lt0.0000,1.0000,0.0000gt

• Move UCS to Face of Tall Box

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EX16-24-05
Command xl XLINE Specify a point or
Hor/Ver/Ang/Bisect/Offset Specify through
point Specify through point Command XLINE
Specify a point or Hor/Ver/Ang/Bisect/Offset Sp
ecify through point Specify through
point Command XLINE Specify a point or
Hor/Ver/Ang/Bisect/Offset o Specify offset
distance or Through ltThroughgt 12 Select a line
object Specify side to offset Select a line
object Command XLINE Specify a point or
Hor/Ver/Ang/Bisect/Offset o Specify offset
distance or Through lt12.0000gt 15 Select a line
object Specify side to offset Select a line
object

• Locate Ø16 Hole-Ctr with xLines OffSet

• Can Only OffSet in UCS X-Y Plane

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EX16-24-06

• Draw Cylinder

Command cylinder Current wire frame density
ISOLINES18 Specify center point for base of
cylinder or Elliptical lt0,0,0gt Specify radius
for base of cylinder or Diameter d Specify
diameter for base of cylinder 16 Specify height
of cylinder or Center of other end -13

• Note Cyl-Hgt is NEGATIVE

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EX16-24-07

• Add Subtract
• UNION of Main-Part Tall Box
• SUBTRACT Ø Cyl

• Use HIDE For Visualization

Command union Select objects 1 found Select
objects 1 found, 2 total Select
objects Command subtract Select solids and
regions to subtract from .. Select objects 1
found Select objects Select solids and regions
to subtract .. Select objects 1 found Select
objects Command Command Command _hide
Regenerating model.
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EX16-19
Time For Live Demo
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EX16-19 Game Plan

• Make Two Cylinders
• Ø40x30L
• Ø28x50L
• Union the Two Cyls to make a Stepped Shaft
• Make Box 60 X 40W x (40-19 21)H
• Locate Box Position on Stepped Shaft

• Subtract Box from Stepped Shaft
• Creates the Flat 19 Above the bottom
• Erase Box
• Make Ø12 Cylinder thru Flat
• Subtract Cyl from the structure
• Erase Cyl

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EX16-19-01

• Make Cyls

Command cylinder Current wire frame density
ISOLINES24 Specify center point for base of
cylinder or Elliptical lt0,0,0gt ltSnap
ongt Specify radius for base of cylinder or
Diameter d Specify diameter for base of
cylinder 40 Specify height of cylinder or
Center of other end 30

• Move Union Cyls w/ Osnap to Make Stepped Shaft

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EX16-19-02
Command CYLINDER Current wire frame density
ISOLINES24 Specify center point for base of
cylinder or Elliptical lt0,0,0gt ltOsnap offgt
ltObject Snap Tracking offgt ltOsnap ongt ltOsnap
offgt Specify radius for base of cylinder or
Diameter d Specify diameter for base of
cylinder 28 Specify height of cylinder or
Center of other end 60 Command m MOVE Select
objects 1 found Select objects Specify base
point or Displacement ltDisplacementgt cen of
Specify second point or ltuse first point as
displacementgt cen of Command union Select
objects 1 found Select objects 1 found, 2
total Select objects Cancel Command
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EX16-19-03
Command box Specify corner of box or CEnter
lt0,0,0gt Specify corner or Cube/Length
l Specify length 40 Specify width 21 Specify
height 60 Command xl XLINE Specify a point or
Hor/Ver/Ang/Bisect/Offset cen of Specify
through point Specify through point Command XLI
NE Specify a point or Hor/Ver/Ang/Bisect/Offset
o Specify offset distance or Through lt1.0000gt
5 Select a line object Specify side to
offset Select a line object Command xl XLINE
Specify a point or Hor/Ver/Ang/Bisect/Offset
cen of Specify through point Specify through
point

• Make Box and Locate Box Position with xLines

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EX16-19-04

• Move Box and Subtract

Command m MOVE Select objects 1 found Select
objects Specify base point or Displacement
ltDisplacementgt Specify second point or ltuse
first point as displacementgt Command _subtract
Select solids and regions to subtract from
.. Select objects 1 found Select objects Select
solids and regions to subtract .. Select objects
1 found Select objects
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EX16-19-05
Command xl XLINE Specify a point or
Hor/Ver/Ang/Bisect/Offset mid of Specify
through point Specify through point Command
xl XLINE Specify a point or Hor/Ver/Ang/Bisect/Of
fset mid of Specify through point Specify
through point Command Cancel Command
ucs Current ucs name WORLD Enter an option
New/Move/orthoGraphic/Prev/Restore/Save/Del/Apply
/?/World ltWorldgt n Specify origin of new UCS
or ZAxis/3point/OBject/Face/View/X/Y/Z lt0,0,0gt

• Move UCS to Locate and Create Ø12 Hole

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EX16-19-06
Command UCS Current ucs name NO NAME Enter
an option New/Move/orthoGraphic/Prev/Restore/Save
/Del/Apply/?/World ltWorldgt n Specify origin of
new UCS or ZAxis/3point/OBject/Face/View/X/Y/Z
lt0,0,0gt x Specify rotation angle about X axis
lt90gt -90 Command cylinder Current wire frame
density ISOLINES24 Specify center point for
base of cylinder or Elliptical lt0,0,0gt Specify
radius for base of cylinder or Diameter
d Specify diameter for base of cylinder
12 Specify height of cylinder or Center of other
end 22 Command Command

• Move UCS to Locate and Create Ø12 Hole

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EX16-19-07

• Subtract Ø12 Cyl, and Chamfer Front Edge

Command _subtract Select solids and regions to
subtract from .. Select objects 1 found Select
objects Select solids and regions to subtract
.. Select objects 1 found Select objects
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EX16-19-08
Command chamfer (TRIM mode) Current chamfer
Dist1 0.0000, Dist2 0.0000 Select first line
or Undo/Polyline/Distance/Angle/Trim/mEthod/Multi
ple d Specify first chamfer distance lt0.0000gt
5 Specify second chamfer distance
lt5.0000gt Select first line or Undo/Polyline/Dist
ance/Angle/Trim/mEthod/Multiple Base surface
selection... Enter surface selection option
Next/OK (current) ltOKgt Specify base surface
chamfer distance lt5.0000gt Specify other surface
chamfer distance lt5.0000gt Select an edge or
Loop Select an edge or Loop Command Command

• Subtract Ø12 Cyl, and Chamfer Front Edge

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EX16-19-09
Command ucs Current ucs name NO NAME Enter
an option New/Move/orthoGraphic/Prev/Restore/Save
/Del/Apply/?/World ltWorldgt m Specify new
origin point or Zdepthlt0,0,0gt
mid of Command Command Command _plan Enter an
option Current ucs/Ucs/World ltCurrentgt Regenera
ting model. Command rotate Current positive
angle in UCS ANGDIRcounterclockwise
ANGBASE0 Select objects 1 found Select
objects Specify base point 0,0 Specify rotation
angle or Copy/Reference lt0gt 90

• Rotate UCS and Object to set SEISO View

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EX16-19-10
Command ucs Current ucs name NO NAME Enter
an option New/Move/orthoGraphic/Prev/Restore/Save
/Del/Apply/?/World ltWorldgt n Specify origin of
new UCS or ZAxis/3point/OBject/Face/View/X/Y/Z
lt0,0,0gt y Specify rotation angle about Y axis
lt90gt 90 Command rotate Current positive angle
in UCS ANGDIRcounterclockwise
ANGBASE0 Select objects 1 found Select
objects Specify base point 0,0 Specify rotation
angle or Copy/Reference lt90gt -90 Command
ucs Current ucs name NO NAME Enter an option
New/Move/orthoGraphic/Prev/Restore/Save/Del/Apply
/?/World ltWorldgt n Specify origin of new UCS
or ZAxis/3point/OBject/Face/View/X/Y/Z lt0,0,0gt
x Specify rotation angle about X axis lt90gt
90 Command

• Rotate UCS and Object to set SEISO View

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EX16-19 Result

• WireFrame HIDE

• Gourand SHADE

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Demo ? EX16-37

• GAME PLAN
• Use TopView from Lecture15 as Base of Object
• Extrude to 2.50 High
• Slice at 45
• Locate Hole Ctr and make ؽ Cylinder

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Game Plan cont.

• Subtract ؽ From Main Block
• Make 1x0.25x0.75 Box and move into place on Main
  Block
• Subtract Box From Main Block
• Make Triangular Prism of height 2.5

• Move Prism into place on Main Block and Subtract

Time For Live Demo
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EX16-37-01
Command pedit Select polyline or
Multiple Object selected is not a polyline Do
you want to turn it into one? ltYgt Enter an
option Close/Join/Width/Edit vertex/Fit/Spline/De
curve/Ltype gen/Undo j Select objects 1
found Select objects 1 found, 2 total Select
objects 1 found, 3 total Select objects 1
found, 4 total Select objects 1 found, 5
total Select objects 1 found, 6 total Select
objects 1 found, 7 total Select objects 7
segments added to polyline Enter an option
Open/Join/Width/Edit vertex/Fit/Spline/Decurve/Lt
ype gen/Undo

• Use PEdit to Make Base form in PolyLine to Extrude

• Start with

Demo_EX16-37_StartFrom_EX5-111-1.dwg
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EX16-37-02

• Extrude PLine to 2.5H
• Enclose in Bounding Box
• xLines to Define Slice-Plane Pts

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EX16-37-03

• Use Slice to Cut Form at 45

Command slice Select objects 1 found Select
objects Specify first point on slicing plane by
Object/Zaxis/View/XY/YZ/ZX/3points
lt3pointsgt Specify second point on
plane Specify third point on plane Specify a
point on desired side of the plane or keep Both
sidesCommand
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EX16-37-04
Current ucs name NO NAME Enter an option
New/Move/orthoGraphic/Prev/Restore/Save/Del/Apply
/?/World ltWorldgt n Specify origin of new UCS
or ZAxis/3point/OBject/Face/View/X/Y/Z lt0,0,0gt
3p Specify new origin point lt0,0,0gt Specify
point on positive portion of X-axis
lt2.6300,0.5000,0.0000gt Specify point on
positive-Y portion of the UCS XY plane
lt1.6300,1.5000,0.0000gt Command xl XLINE Specify
a point or Hor/Ver/Ang/Bisect/Offset o Specify
offset distance or Through ltThroughgt
.88 Select a line object Specify side to
offset Select a line object Specify side to
offset Cancel Command XLINE Specify a point
or Hor/Ver/Ang/Bisect/Offset o Specify offset
distance or Through lt0.8800gt 1.06 Select a
line object Specify side to offset Select a
line object

• Locate Hole Center on Slant-Face

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EX16-37-05

• Draw Long Cylinder thru Block

Command cylinder Current wire frame density
ISOLINES24 Specify center point for base of
cylinder or Elliptical lt0,0,0gt Specify radius
for base of cylinder or Diameter d Specify
diameter for base of cylinder .5 Specify height
of cylinder or Center of other end
-3 Command Command
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EX16-37-06

• Subtract Cyl from Block to complete

Command subtract Select solids and regions to
subtract from .. Select objects 1 found Select
objects Select solids and regions to subtract
.. Select objects 1 found Select objects
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EX16-37 Result

• Today

• Lec15 Sketch

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OrthoViews From Solid
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All Done for Today
EX16-37 One Last Look
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Engr/Math/Physics 25
Appendix
?
Time For Live Demo
Bruce Mayer, PE Licensed Electrical Mechanical
EngineerBMayer_at_ChabotCollege.edu
42
EX15-4.1
Command _ai_box Initializing... 3D Objects
loaded. Specify corner point of box ltSnap
ongt Specify length of box 6 Specify width of box
or Cube 5 Specify height of box 2 Specify
rotation angle of box about the Z axis or
Reference Command Command _-view Enter an
option ?/Categorize/lAyer state/Orthographic/Del
ete/Restore/Save/Ucs/Window _swiso

• Make Blue Obj Layer
• Box in WCS