1. Power Nail Puller Attachment Altitude Engineering Sponsored by Frontier Barnwood University of Wyoming Undergraduate Research Day Mechanical Engineering Design Symposium April 26, Brady Adams Zachary Frame Jerry Hahn Robert Marion
Background
Prior designs from 1980’s
and 2007
Compliance Testing
Weight of Attachment
4.3 lb
Nail Pulling
Cycle time – 14 to 60 seconds
Clenched and straight nails
Raised, flush and embedded
Specifications
Performance
Pull 8d -60d nails
15 second cycle time
6 inch stroke
Limited damage
Adverse conditions
Weight
Less than 5 lbs
Cost
$1000 Budget
Cost Analysis
Prototype Cost
Materials - $282
Engineering Labor - $18,800
Fabrication Labor - $2,100
Societal Impact
Workers
Decrease physical strain
Company
Increase efficiency
Increase production
Modeling
Power screw
Support frame
Gears
Drilling head
Extraction
Head
Support
Frame
Power
Screw
Guide
Rod
Handle
Hammer
Drill
Conclusion
Effectively pulled nails using drilling head method
Recommendations would include a self-aligning three gear system
Testing
Hole saw torsion
Drill chuck hardness
Drill chuck tension
Tightening System
Modified Drill Chuck