A mechanism is a
device designed to transform input forces and movement into a desired set of
output forces and movement.
Pro-Mechanism
is a very useful module to design the mechanism and to know the dynamic path of
the parts, interference in an assembly.
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Bodies
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Connections of Bodies
ØMost
Used Connections
ØPin
ØCylinder
ØPlanner
ØSlot
ØBall
ØSlider
ØAlso,
we have
ØBearing
ØRigid
& weld
ØGeneral
Ø6DOF
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Connection - Pin
The
pin connection is used to rotate the part about an axis.
Examples:-
üDoor that swings open
üWheel that turns
Pin - axis alignment and a
translational constraint
Joint
Axis settings on Rotational motion
Joint Axis setting is used for control the
rotation of a part with some specified angle like 0 deg to 180 deg.
Drag
- Drag
is the option is used for check the motion of the rotating part manually.
Servo
Motor – Animate the part & Run the assembly.
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Connection - Cylinder
The
cylinder connection is used to capture a component moving in a direction, and
able to rotate about that direction
Examples:-
üCycle air pump
üPiston action on cylinders
Joint
Axis settings on Parallel Motion
Joint Axis setting is used for control the
distance of a moving part within
specified distance like 1 to 50 mm.
Reverse Servo Motor – Animate
the part
Run
the assembly.
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Connection - Planer
A Planar connection is used to
ensure that a datum plane or planar surface always touches another plane or
planar surface,
Examples:-
üLM
Guide Rail & Runner Block
üA box
sliding across a floor
üAny
object that rests on a flat surface, but can be moved about that surface.
üPlaner - Plane moves on Plane
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Connection - Slot
Slot Connection is used to move a
component along a path.
Examples:
Bevel Gauge
Geneva Mechanism
Slot
– Point
Moves on Curve
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Connection - Ball
ball
connection is used to simulate a joint where the translation is completely
fixed, but all rotational degrees of freedom are available.
Examples:-
Toggle
Switch
Ball
joint gas springs
Ball Connection - require
two points or vertices to be aligned, and they have no joint settings.
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Cam Follower
A Cam-Follower is
used to simulate an object moving along the surface of another object.
Example- All
Cam design applications
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Gear Connection
Gear
pairs are used to simulate two gears in mechanism
Standard –
Use this when you want your two gears to rotate in the same or opposite
directions, such as a spur-spur or worm and wheel gear.
Rack and Pinion –
Use this when you want to be able to translate rotational motion into
translational motion.
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Interference checking & Create
a movie file
We can capture a
playback result set as an MPEG file, or as a series of JPEG, TIFF, or BMP files
by using playback option.
· Start Time = 0
· End Time = 10
· Frame Rate = 10
· Minimum Interval = .1
· Frame Count = 101
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Summary
COMPONENTS OF MECHANISM
Step
1 – Assemble Components
Step
2 – Modify Joint Axis Settings
Step
3 – Create Cams or Gear Pairs
Step
4 - Drag Components
Step
5 – Create Servo Motors
Step
6 – Create and Run Analyses
Step
7 – Check interference & Create a movie file
Connection
Type
|
Translational
DOF
|
Rotational
DOF
|
References
Needed
|
Pin
|
0
|
1
|
2 Axes or Edges & 2 Planes,
Planar Surfaces, Datum Points or Vertices
|
Slider
|
1
|
0
|
2 Axes or Edges & 2 Planes or
Planar Surfaces
|
Cylinder
|
1
|
1
|
2 Axes or Edges
|
Planar
|
2
|
1
|
2 Planes or Planar Surfaces
|
Ball
|
0
|
3
|
2 Datum Points or Vertices
|
Bearing
|
1
|
3
|
1 Datum Point and 1 Axis or Edge
|
Weld
|
0
|
0
|
2 Coordinate Systems
|
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PRACTICE
MAKES YOU PERFECT
THANK YOU
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Ref- Sharptechdesign web.
