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Redesign of Hand Auger

Redesign of Hand Auger. Caroline Tulloh BE 3320. Hand Auger. http://b2bimg.bridgat.com/files/handle_earth_auger.jpg. Hand Auger Types. http://soils.usda.gov/technical/manual/images/fig4-10_large.jpg. Design of Hand Auger. Three Main Components Threads Outside Shaft

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Redesign of Hand Auger

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  1. Redesign of Hand Auger Caroline Tulloh BE 3320

  2. Hand Auger http://b2bimg.bridgat.com/files/handle_earth_auger.jpg

  3. Hand Auger Types http://soils.usda.gov/technical/manual/images/fig4-10_large.jpg

  4. Design of Hand Auger • Three Main Components • Threads Outside Shaft • Approximately Six Meters in Length • Typically Manufactured with Steel http://collections.infocollections.org/ukedu/collect/ukedu/index/assoc/h2380e/p018.gif

  5. Components Chosen for Redesign • Material – from Cast or Alloy Steel to Carbon Steel • Auger Threads – increase width of threads and decrease pitch

  6. Inventor Drawing – Hand Auger

  7. Inventor Drawing – Auger Threads

  8. Inventor Rendering

  9. Design Equations • F=ma=(80kg)(9.82m/s^2)=784.8 N • τ=rFsin(θ)=((3m)(785N)(1))=2355 Nm (handle) • τ=rFsin(θ)=((6m)(785N)(1))=4710 Nm (threads)

  10. Stress Analysis

  11. Dynamic Simulation

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