Engineering Inc' Me 358 Mechanism Analysis

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Engineering Inc.Me 358 Mechanism Analysis
Chad
Jason

• Group 5
• 11/19/04
• Jason Schutter
• Chad Beutel
• Kevin Schaefer
• Brian Tucker

Kevin
Bronco Brian
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Abstract

• The assigned project asked for a system of
  four-bar linkages arranged to produce a
  straight-line output of nine inches. The
  mechanism was to fit in the smallest possible
  area given the design guide lines 9 inch
  vertical output, 10 inches/sec max velocity,
  motor located 3 feet from output in a 1 foot by 2
  foot box, and a 6 inch clearance of all linkages
  with shop floor. The product design task was
  resolved using a four-bar linkage in conjunction
  with a Tchebicheff four-bar linkage. After the
  mechanism was finalized, it met the required
  specifications and fit into an area 5 feet long
  by 3.5 feet high with 6 inches of clearance.

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Introduction

• Graphical and analytical analysis was performed
  for position, velocity and acceleration on the
  system at the point where vertical motion has the
  greatest velocity (VP 9.991 in/s). Working
  Model was used to draw a scale model of the
  system and to confirm that it met all
  requirements. Analytical analysis was completed
  in MathCAD, and Excel was used to compare the
  results of our graphical and analytical analysis.

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Working Model
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Graphical Mechanism
All measurements in inches
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Graphical AnalysisMechanism 1

• Position Analysis
• q3 270
• q4 206
• Velocity Analysis
• VA 2.4348 in/s _at_ 90
• W3 0.2378 rad/s CW
• VB 2.7 in/s _at_ 305
• W4 0.238 rad/s CW
• Acceleration Analysis
• AA 4.9402 in/s2 _at_ 180
• AB 0.646 in/s2 _at_ 26
• a3 1.0874 rad/s2
• a4 0 rad/s2

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Graphical AnalysisMechanism 2

• Position Analysis
• q3 0
• q4 63
• Velocity Analysis
• VA-11.1456 in/s _at_ 334
• W30.9287 rad/s CCW
• VB-11.1456 in/s _at_ 26
• W40.238 rad/s CCW
• VP10 in/s _at_ 0
• Acceleration Analysis
• AA7.392 in/s2
• AB2.6526 in/s2
• a30.157 rad/s2
• a40 rad/s2

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Analytical AnalysisMechanism 1
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Analytical AnalysisMechanism 1
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Analytical AnalysisMechanism 1
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Analytical AnalysisMechanism 2
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Analytical AnalysisMechanism 2
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Analytical AnalysisMechanism 2
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Analytical AnalysisMechanism 2
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Results
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Conclusion

• In conclusion, the combination of the two
  four-bar mechanisms resulted in a 9 vertical
  motion of a point on link B of mechanism 2. To
  achieve an output velocity of 10 in/s the motor
  attached to link A on mechanism 1 must have an
  angular velocity of 2.029 radians per second or
  19.38 revolutions per minute. The work space was
  minimized to a 5 foot by 3.5 foot area with 1
  wide links.

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Resources

• Computer Programs
• MathCAD
• AutoCAD
• Working Model
• Excel
• Other Resources
• Design of Machinery R.L. Norton
• www.brockeng.com