Ansys Workbench-Chapter02

1. Chapter 2 Sketching
1
Chapter 2
Sketching
2.1
Step-by-Step: W16x50 Beam
2.2
Step-by-Step: Triangular Plate
2.3
More Details
2.4
More Exercise: M20x2.5 Threaded Bolt
2.5
More Exercise: Spur Gears
2.6
More Exercise: Microgripper
2.7
Review

2. Chapter 2 Sketching
Section 2.1 W16x50 Beam
2
Section 2.1
W16x50 Beam
16.25"
.628"
.380"
7.07"
R.375"
W16x50
[1] Wide-flange
I-shape section.
[2] Nominal
depth 16 in.
[3] Weight 50
lb/ft.
Problem Description

3. Chapter 2 Sketching
Section 2.1 W16x50 Beam
3
• Start up <DesignModeler>
• Sketching/Modeling modes
• Draw>Rectangle
• Draw>Polyline
• Dimensions>General
• Dimension>Horizontal
• Dimensions>Display
• Dimensions>Move
• Modify>Copy/Paste
• Modify>Trim
• Modify>Fillet
• Constraints>Symmetry
• Auto Constraints
• Constraint Status
• Extrude
Techniques/Concepts

4. Chapter 2 Sketching
Section 2.1 W16x50 Beam
4
[1] Click: single
selection
[2] Control-click: add/
remove selection
[3] Click-sweep:
continuous selection.
[4] Right-click: open
context menu.
[5] Right-click-drag:
box zoom.
[6] Scroll-wheel: zoom
in/out.
[7] Middle-click-drag:
rotation.
Basic Mouse Operations

5. Chapter 2 Sketching
Section 2.2 Triangular Plate
5
Section 2.2
Triangular Plate
40mm
30 mm
300 mm
[1] The plate
has three
planes of
symmetry.
[2] Radii of
the fillets
are 10 mm.
Problem Description

6. Chapter 2 Sketching
Section 2.2 Triangular Plate
6
Techniques/Concepts
• Draw>Arc by Center
• Dimensions> Radius
• Modify>Replicate
• Modify>Offset
• Constraints>Equal Length
• Weak/Strong Dimensions
• Weak/Strong Constraints
• Selection Filter
• Single/Box Selection

7. Chapter 2 Sketching
Section 2.2 Triangular Plate
7
2D Graphics Controls
[8] <Undo>.
[9] <Redo>.
[2] <Zoom to Fit>.
[4] <Box Zoom>.[5] <Zoom>.
[1] <Look At Face/
Plane/Sketch>.
[6] <PreviousView>.
[7] <NextView>.[3] <Pan>.

8. Chapter 2 Sketching
Section 2.3 More Details
8
• Pull-down Menus
and Toolbars
• Mode Tabs
• Tree Outline
• Sketching
Toolboxes
• Graphics area
• DetailsView
• Status Bar
• Separators
Section 2.3 More Details

9. Chapter 2 Sketching
Section 2.3 More Details
9
[1] Currently
active plane.
[2] To create a
new plane,
click <New
Plane>.
[3] There are many ways
of creating new planes.
Sketching Planes
• A sketch must be created on a
sketching plane; each plane may
contain multiple sketches.
• In the very beginning of a
<DesignModeler> session, three
planes are automatically created:
<XYPlane>, <YZPlane>, and
<ZXPlane>.

10. Chapter 2 Sketching
Section 2.3 More Details
10
Sketches
• A sketch consists of points and edges; edges may be straight lines or curves.
• Multiple sketches may be created on a plane.
[1] To create a new sketch on
the active sketching plane,
click <New Sketch>.
[2] Currently
active sketch.

11. Chapter 2 Sketching
Section 2.3 More Details
11
Auto Constraints
• C
- The cursor is coincident with a line.
• P
- The cursor is coincident with another point.
• T
- The cursor is a tangent point.
• ⊥
- The cursor is a perpendicular foot.
• H
- The line is horizontal.
• V
- The line is vertical.
• //
- The line is parallel to another line.
• R
- The radius is equal to another radius.
[1]You can turn
on/off <Auto
Constraints>.

12. Chapter 2 Sketching
Section 2.3 More Details
12
Sketching Toolboxes

13. Chapter 2 Sketching
Section 2.4 M20x2.5 Threaded Bolt
13
Section 2.4
M20x2.5 Threaded Bolt
Problem Description
M20x2.5
[1] Metric
system.
[2] Nominal
diameter
d = 20 mm.
[3] Pitch
p = 2.5 mm.

14. Chapter 2 Sketching
Section 2.4 M20x2.5 Threaded Bolt
14
32
11×p=27.5
d1
d
External
threads
(bolt)
Internal
threads
(nut)
H
H
4
H
8
p
Minor diameter of internal thread d1
Nominal diameter d
H = ( 3 2)p = 2.165 mm
d1
= d − (5 8)H × 2 =17.294 mm
p

15. Chapter 2 Sketching
Section 2.4 M20x2.5 Threaded Bolt
15
• Dimensions>Angle
• Modify>Replicate
• Revolve
Techniques/Concepts

16. Chapter 2 Sketching
Section 2.5 Spur Gears
16
Section 2.5
Spur Gears
Problem Description
• To satisfy the fundamental law
of gearing, the gear profiles
are cut to an involute curve.

17. Chapter 2 Sketching
Section 2.5 Spur Gears
17
[7] Common
tangent of the
pitch circles.
[6] Contact
point (pitch
point).
[8] Line of action (common
normal of contacting gears).
The pressure angle is 20o
.
[3] Pitch circle
rp = 2.5 in.
[9] Addendum
ra = 2.75 in.
[10]
Dedendum
rd = 2.2 in.
[1] The driving
gear rotates
clockwise.
[2] The driven
gear rotates
counter-
clockwise.
[4] Pitch
circle of the
driving gear.
[5] Line of
centers.
[12] The fillet
has a radius of
0.1 in.
[11] The shaft has
a radius of 1.25 in.

18. Chapter 2 Sketching
Section 2.5 Spur Gears
18
Techniques/Concepts
• Draw>Construction Point
• Draw>Spline
• Modify>Replicate
• Constraints>Perpendicular

19. Chapter 2 Sketching
Section 2.6 Microgripper
19
Section 2.6
Microgripper
Problem Description
[2] Actuation
direction.
[1] Gripping
direction.
[3] SMA
actuator.
[4] Glass
bead.

20. Chapter 2 Sketching
Section 2.6 Microgripper
20
480
144
176
280
400140212
7747
87
20
R25R45
32
92
D30
Unit: µm
Thickness: 300 µm

21. Chapter 2 Sketching
Section 2.6 Microgripper
21
Techniques/Concepts
• Constraints>Equal Radius
• Copy bodies (Mirror)
• Create new sketch
• Constraints>Tangent
• Multiple parts