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.
==Problem Definition==
===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.
===Design Specifications===
Specification 	Threshold 	Objective
Impact Mode 	Single impact 	Single and cyclic (3 repetitions)
Impact Region 	All four sides and forward impact 	360° capability
Calibration 	Can be calibrated to a specific g force 	NA
Scope removal while testing	Removed and collimated after each side impact and forward impact	NA
Size of machine 	2'x2'x3' 	1'x1'x2'
Data collection 	Output to laptop/flash drive, record time and g force 	Real time output to external screen
Scope sizes 	Attachment method for 30mm and 34mm diameter tubes 	universal, adjustable attachment method
Machine use 	Research and development / proof of concept 	Production floor ready
Operator 	Anyone should be able to operate 	NA
Time to operate 	As long as needed 	≤45s
Safety 	Can not automatically or unintentionally go off 	Additional safety guard to protect operator's limbs or fingers
Surface conditions 	Can not damage the surface or bend the trim ring 	NA
==Project Learning==
===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
===Design matrix for power input===
Variable 	weight	Linear actuator	Electric motor	Mechanical Spring	Pneumatic
Price 	3 	4 (12) 	3 (9) 	5 (15) 	3 (9)
Speed 	5 	2 (10) 	4 (20) 	4 (20) 	4 (20)
Size 	3 	3 (9) 	5 (15) 	5 (15) 	5 (15)
Durability 	4 	3 (12) 	2 (8) 	3 (12) 	4 (16)
Availability 	2 	5 (10) 	5 (10) 	3 (6) 	5 (10)
Ease 	2 	3 (6) 	4 (8) 	2 (4) 	3 (6)
Calibration 	5 	4 (20) 	5 (25) 	2 (10) 	4 (20)
Weighted totals	 	79 	95 	82 	96
==Design==
===Initial design ideas / Brainstorming===
			
===Testing and Project Learning===
 	 	
A Solidworks based simulation of a pendulum for validating mathematical model and compare theoretical and experimental results.	A rough prototype pendulum used to help understand the efficiency of momentum transfer between a mass and the scope	Data output from accelerometer of a scope being impacted by the pendulum. Notice the high level of noise, this is something we will have to figure out in order to obtain better data.
===Final/Detailed Design===
==Finished Product==
==Team Information==
 
Picture	Info	Bio
 	Kylie Touchstone:
*major: Mechanical Engineering
*email: touc9217@vandals.uidaho.edu
*home town: Boise, ID	I am a senior mechanical engineer at the University of Idaho, graduating spring of 2016. Classes that I have enjoyed include: Mechanics of Material, Fatigue and Fracture and both my CAD classes working with SolidWorks and CATIA. I interned with HP in Vancouver, WA this summer on the writing systems team and had a blast with it. Some of my hobbies included snowboarding, hunting, camping, reading and gaming. Some of my favorite games are Bioshock, Portal, Skyrim, Dragon Age Inquisition, and League of Legends. Favorite Authors are Brandon Sanderson and Christopher Pike.
 	Jason Borth:
*major: Mechanical Engineering
*email: bort7296@vandals.uidaho.edu
*home town: Genesee ID	I began school at the University of Idaho in the fall of 2012 and am now a senior in mechanical engineering. My favorite part about mechanical engineering is that you are not limited to a specific area of study. One day you are learning about non symmetric bending of beams and the next day, rocket science. As lifelong Idaho resident, I enjoy doing all the outdoor Idaho things shooting, hiking, etc. My favorite YouTube channels include but are not limited to, Veritasium, SmarterEveryDay, DemolitonRanch, ColinFurze, jimmydiresta, Numberfile, and Ed Bassmaster.
 	Jay Anderson:
*major: Mechanical Engineering
*email: ande5752@vandals.uidaho.edu
*home town: Cheney, WA	I am from Cheney WA and began school at the University of Idaho in the fall of 2012, I am a senior in mechanical engineering, and work for the US Army Corps. of Engineers as a Hydropower Engineer. I choose mechanical engineering because I have loved airplanes all of my life and want to design either aircraft or rocket engines. I was born and raised a vandal and really love Moscow. I like to go hiking, shooting trap and skeet, swing dancing, and photography. My favorite Youtube Channels are SmarterEveryDay, Vsause, C.G.P. Grey, Numberfile, Minutephysics, and CrashCourse. I also enjoy listening to podcast such as Hello Internet, Cortex, and The Orbital Mechanics.
 	Dillon Glover:
*major: Mechanical Engineering
*email: glov7925@vandals.uidaho.edu
*home town: Asotin WA	I am from Asotin WA but have mostly lived in Idaho throughout my life. I began my engineering education at the University of Idaho in 2012 where I am a senior now. I am a current engineering intern at CCI/Speer where I work in manufacturing. I chose to be an engineer because of my interest in mechanical systems and how they work. Other than work and going to school, you will find me in the mountains bugling at elk or fishing a mountain lake. If I am not hunting or fishing I am usually riding dirtbikes with my wife or hitting the snowy hills on my snowmobile.
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Category:Capstone Design