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Ken YoussefiMechanical Engineering Dept.*Degrees of FreedomAny
component that is unconstrained in space has six degrees of
freedom. Translation movement along X, Y, and Z axis (three degrees
of freedom)Rotation rotate about X, Y, and Z axis (three degrees of
freedom)
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*JointsA mechanism is a
mechanical portion of a machine that is responsible for
transferring motion, force, and torque from an input source to an
output source. A mechanism consists of linkages and joints. Links
are considered rigid parts. Joints are movable connections between
links and allow relative motion between links.
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*JointsThe Sliding joint
(prism or piston joint) - one degree of freedomIt allows linear
sliding between the two links that it connects (P joint)
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*JointsThe Helical joint
(helix or screw joint) - one degree of freedomThe sliding and
rotational motions are related by the helix angle of the thread (H
joint)
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*JointsThe Cylindrical
(cylindric) joint - two degrees of freedomIt permits both angular
rotation and an independent sliding motion (C joint)
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*JointsThe Spherical
(spheric) - Three degree of freedomIt permits rotational motion
about all three axes, a ball-and-socket joint (S joint)
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*JointsThe Planar (flat)
- Three degree of freedomIt permits rotational motion about the Z
axes axis and sliding motion in x and y axes (F joint), used seldom
in design
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*JointsA cam joint
allows both rotation and sliding between two links.A gear
connection also allows both rotation and sliding as the gear teeth
mesh
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion AnalysisIn
general, there are two types of motion analysis that should be
performed to check the design.Kinematics: deals with the study of
motion without regard for the forces that cause the motion. The
analysis provides information about the position, velocity and
acceleration of all links.Kinetics: deals with the action of forces
on the mechanism. It provides information about the forces at the
joints and the required input torque.
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion AnalysisThe
process of analyzing the motion of a mechanism.Geometric modeling
of all parts and creating an assembly model of the mechanism with
proper mates.Generate the motion model:Define ground (fixed)
componentsDefine moving componentsDefine joints and
connectionsSpecify driver(s) componentSpecify loads; external
loads, body force (gravitational)Perform motion analysis
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion AnalysisResults
visualization (post-processing)Graphs study the position, velocity,
and acceleration of any link or any point on a given linkAnimation
check the overall motion and interferencePrepare reports graphs and
chartsQuery results at specific locations for a given timeAVI and
VRML convert the motion to an AVI or export animations to VRML
format for distribution on the Internet
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion AnalysisTools
Add-Ins and check SolidWorks Motion or COSMOSMotion2009/102008
Mechanical Engineering Dept.
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Motion AnalysisKen YoussefiMechanical Engineering Dept.*Motion
Analysis combines motion study elements with mates in motion. It
also calculates loads that can be used in finite element
analysis.Basic Motion option approximates the effects of Motors,
Springs, Collision and Gravity on assembly. This is a physics based
simulationAnimation option creates simple animations based on point
to point motion of parts in assemblies. Motor could also be
used.Select Motion Study 1
Mechanical Engineering Dept.
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Motion Analysis - ToolbarKen YoussefiMechanical Engineering
Dept.*
Mechanical Engineering Dept.
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Motion Analysis - ToolbarKen YoussefiMechanical Engineering
Dept.*
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion Analysis -
Toolbar
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*No Filter, shows all
itemsFilter Animated, shows only the moving itemsFilter Driving,
shows only the items that cause motionFilter Selected, shows only
the selected itemsFilter Results, shows only simulated result
itemsMotion Analysis - Toolbar
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*
Mechanical Engineering Dept.
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Motor SelectionKen YoussefiMechanical Engineering Dept.*Select
Motor type
Mechanical Engineering Dept.
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4-Bar in motionKen YoussefiMechanical Engineering Dept.*
Mechanical Engineering Dept.
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Results of Motion Analysis 4 StepsKen YoussefiMechanical
Engineering Dept.*Select a category
Mechanical Engineering Dept.
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Results of Motion AnalysisKen YoussefiMechanical Engineering
Dept.*Select a result component
Mechanical Engineering Dept.
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Results of Motion AnalysisKen YoussefiMechanical Engineering
Dept.*
Mechanical Engineering Dept.
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Results of Motion AnalysisKen YoussefiMechanical Engineering
Dept.*Plotting the angular velocity of the 9 in. link against the
angular displacement of the 2 in. link (input)
Mechanical Engineering Dept.
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Force AnalysisKen YoussefiMechanical Engineering Dept.*Force
Mechanical Engineering Dept.
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Path AnalysisKen YoussefiMechanical Engineering Dept.*
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Disable Orientation and
Camera Views
Mechanical Engineering Dept.
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Motion Analysis Slider Crank Mechanism
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Assembled Slider-Crank Mechanism
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Animation WizardCreate simple animations automatically: rotate
model about any axis, Explode and collapse model
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Animation Wizard
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Animation Wizard
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Ken YoussefiMechanical Engineering Dept.*Fixing or Floating
Components in Assemblyf stands for fixed component- stands for
moving componentRight click the component to change it from fixed
to float
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*2 in link is fixed and
7 in link is the driver
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Hinge Mate
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*COSMOSMotion Joints,
2007/8 SW
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*COSMOSMotionStraight
line mechanismEach rod drawn in a separate file and assembled using
various mates. All connections are pin joints (Revolute).
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Straight line
mechanism
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*COSMOSMotion -
IntelliMotionAt the top of the FeatureManager, select the Motion
tab .
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*COSMOSMotion
IntelliMotion (gravity)Specify the magnitude and direction in which
gravity acts This means that a vector of 0,-1, 0 defines the
direction
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*IntelliMotion Moving
and Ground ComponentsDesignate the moving and fixed components
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*IntelliMotion
JointsMates specified during assembly will be displayed. You can
add or modify joint type.
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*IntelliMotion
MotionSelect the driver jointSelect input motion type
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*IntelliMotion
SimulationSelect duration and the number of frames.Start the
simulation
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*IntelliMotion
AnimationCreate and save the animation in the AVI formatCheck for
interference
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion analysisPath of
any point on the mechanism could be traced
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion analysis -
Velocity
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion analysis
Position of ComponentsAn angular displacement between any two
components could be plotted.
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion analysis Select
MotorRotary MotorLinear Motor
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion analysis Apply
Forces
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion analysis XY
plots
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion analysis
NX5Select Motion Simulation module
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion analysis
NX5First select the Solution and then the Solve option
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion analysis NX5
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion analysis NX5
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Potato cutter (french
fries)
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Chrome handleRed
sliderPlastic handleSide bar
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Cutting bladeChrome
back platePusherClamp
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*After creating assembly
model, select Motion Simulation module from the Start menu
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Assign a driver, right
click on joint j006 and select Edit
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*After assigning the
driver, select Solution and then select Solve
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Select Animation
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Interference Check
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Just before
interferenceCheck Interference and Pause on Event
Mechanical Engineering Dept.
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Ken YoussefiMechanical Engineering Dept.*Motion analysis NX5
(example)
Mechanical Engineering Dept.