Slide 1
Toy Dart Gun Design
MAE 477 Final Project
final assembly.bmpBy Christopher Deptula
Design Project Goals!
Design Goals
Develop a working toy dart gun design that will not fail under
the stresses of firing.
A design that is easy to use.
A design that has a working dart clip that will feed the darts
to the gun.
Research of Current Products
Research
Comparing Current Products on the market
Customer Survey
Reverse engineering of a current product
41-vG5yISpL__AA400_.jpgimagesCARP6OSP.jpgIM000224.JPG41TWHT45STL__AA400_.jpgdart2.jpg41620665-450x450-0-0_Tommy+Hilfiger+Ruff+Stuff+Air+Blasters+Motorized+M.jpgAAAAC_GgO8wAAAAAAAofpw.jpg3.bmpimagesCARP6OSP.jpgnerf_n-strike_raider_cs-35.jpgEarly
Sketches/ Final Sketchs
Three possible gun designs
Two possible dart clip designs
Decision Matrix to determine the best
SCAN0010.JPGSCAN0009.JPGSCAN0008.JPGCAD Modeling / Assembly
Made up of 4 Sub-assembles
Handle, Pump, Dart and Clip.
dart.bmpclip assemble.bmppump assembly.bmphandle
assembly.bmpHandle pump arm.bmpside open.bmpCAD Modeling/
Assembly
exploded final.bmpfinal assembly.bmpMotion Analysis
Performed a Motion Analysis to determine the displacement of the
Dart
Calculated to travel 1o Feet
motion set up.bmpx-displacement of dart.bmpMotion Analysis
Finite-Element Analysis
Performed FEA on Part Arm and Pump Front
The Pump Front Fail
Re-Designed The Pump Front
arm results.bmparm mesh.bmpFinite-Element Analysis
pump mesh.bmppump stress.bmppump redesign mesh.bmpredesign
stres.bmpFuture
The Next Step/ If I had more time.
Redesign Arm to fit with the new pump front.
Perform FEA on the new arm and more parts within the
assembly.
Redesign the pump assembly to increase range.
Conclusion
Design Goals
Motion Analysis
Finite-element Analysis
SCAN0014.JPGside open.bmpclip assembly exploded.bmp
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