Impact Testing Device - Nightforce Optics

Currently Nightforce Optics manual impacts each scope that goes through the line, our mission was to make this process automatic. We developed an automatic pendulum to consistent hit the scope. Which can apply different forces depending on the operator's needs. It improved safety and decreases human error.

Background
Each and every Nightforce riflescope is impact tested as it goes through the production line. This is currently accomplished by impacting the scope by hand against a padded steel pedestal in multiple orientations. After impact the riflescopes are inspected for damage and functionality. When the production line workers manually impact the riflescopes there are inconsistencies with the impacts throughout the day and amongst the workers.

Design Goal
Nightforce Optics is seeking a prototype/proof of concept of an impact device that will consistently deliver a cyclic impact of set value between 200-2000 g’s. The prototype needs to allow the user to quickly remove the scope from the device, hit all sides of the scope, and fit an area smaller than 2’x2’x3’. In addition, the prototype cannot cosmetically damage the scope and needs to operate safely.

Underlying equations
The Work-Energy Principle states that the change in the kinetic energy of an object is equal to the net work done on the object. since the impacting device will come to a complete stop, the change in its kinetic energy is equal to the initial Kinetic energy.(Average impact force) x (distance traveled) = (change in kinetic energy)for a linear system F*d=1/2 m*v^2 and for a rotational system F*d=1/2 I*ω^2. from these equations we can then estimate the impact force and acceleration felt by the scope

Meeting Minutes

 * [[Media:2015_ImpactTestingDevice_MM9-10-15.pdf| September 10th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM9-14-15.pdf| September 14th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM9-17-15.pdf| September 17th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM9-25-15.pdf| September 25th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM10-1-15.pdf| October 1st 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM10-8-15.pdf| October 8th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM10-15-15.pdf| October 15th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM10-22-15.pdf| October 22nd 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM10-29-15.pdf| October 29th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM11-2-15.pdf| November 2nd 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM11-9-2015.pdf| November 9th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM11-16-15.pdf| November 16th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM11-30-15.pdf| November 30th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM12-6-2015.pdf| December 7th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM1-15-16.pdf| January 15th 2016 ]]
 * [[Media:2015_ImpactTestingDevice_MM1-20-16.pdf| January 20th 2016 ]]
 * [[Media:2015_ImpactTestingDevice_MM1-21-16.pdf| January 21st 2016 ]]
 * [[Media:2015_ImpactTestingDevice_MM1-25-16.pdf| January 25th 2016 ]]
 * [[Media:2015_ImpactTestingDevice_MM1-28-16.pdf| January 28th 2016 ]]
 * [[Media:2015_ImpactTestingDevice_MM2-18-16.pdf| February 15th 2016 ]]
 * [[Media:2015_ImpactTestingDevice_MM2-25-16.pdf| February 25th 2016 ]]
 * [[Media:2015_ImpactTestingDevice_MM3-3-16.pdf| March 3rd 2016 ]]
 * [[Media:2015_ImpactTestingDevice_MM3-24-16.pdf| March 24th 2016 ]]
 * [[Media:2015_ImpactTestingDevice_MM3-31-16.pdf| March 31st 2016 ]]
 * [[Media:2015_ImpactTestingDevice_MM4-7-16.pdf| April 7th 2016 ]]
 * [[Media:2015_ImpactTestingDevice_MM4-21-16.pdf| April 21st 2016 ]]

Presentations/Reports
[[Media:2015_ImpactTestingDevice_Snapshot1.pdf| First Snapshot Poster]]

[[Media:2015_ImpactTestingDevice_Design_Review.pdf| Design Review Power Point]]

[[Media:2015_ImpactTestingDevice_DetailedDesignReview.pdf| Detailed Design Review Power Point]]

[[Media:2015_ImpactTestingDevice_DFMEA.pdf| Design Failure Mode and Effect Analysis]]

[[Media:2015_ImpactTestingDevice_EXPO.pdf| Engineering Expo Poster]]