368 Players Ridge Rd Hickory NC 28601 (828)244-3914 rhamby@uncc.edu

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Device for Producing Micro-Gratings on Optical Structures (Senior Design) __ ____________________________ Project: To Designed, Developed, and Produced a working Device for the Ruling on a Freeform Optical Surface.

o Inner flexure flanges are 0.2mm in thickness. Learned new techniques for machining small parts. ♦ Engineering Challenges: Vibrations during machining, machine runout, low stiffness in small flexures

Assembly

Display

Outer Flexure

368 Players Ridge Rd Hickory NC 28601 (828)244-3914 rhamby@uncc.edu

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Inner Flexure

Completed Flexure

Capacitance Probe Holder (5mm)

Housing

368 Players Ridge Rd Hickory NC 28601 (828)244-3914 rhamby@uncc.edu

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Device for Ruling on Freeform Optical Surfaces Project: To Designed, Developed, and Produced a working Device for the Ruling on a Freeform Optical Surface.

o All components excluding air bearing components were machined on Bridgeport machine tool. o Creation of part drawings including all tolerance of components

RESULTS Examined with Scanning Electron Microscope

Utilized Kistler Dynamometer to produce Figure 1 of force desired relative to moment arm application Figure1 Developed as step input of precise weight application resulting in piecewise function determined empirically. 40 Hz was used as cutoff to eliminate frequencies from surrounding walls. Sensitivity of Kistler dynamometer was 1 N/V for testing. Resulting Conclusion: Prove of concept allowing for continuation to Senior Design Project. Displayed ability to make rulings at low force needed for rulings on free form optical surfaces.

368 Players Ridge Rd Hickory NC 28601 (828)244-3914 rhamby@uncc.edu

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Base Action Arm

Bracket

Position Arm Capacitance Probe Holder 8mm

368 Players Ridge Rd Hickory NC 28601 (828)244-3914 rhamby@uncc.edu

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Mobile Robotic Crane

Mobile Robotic Crane (Junior Design) o Utilized PTC Creo to fully design and develop a working model of a mobile robotic crane o Presented design schematics with all calculation necessary for building o Constructed full reports of project plan, memos, design package, bill of material, and calculations o Machined working robotic using lathe, sander, grinder, drill press, and milling equipment o Effectively communicated and participated in team while working 3 jobs

368 Players Ridge Rd Hickory NC 28601 (828)244-3914 rhamby@uncc.edu

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368 Players Ridge Rd Hickory NC 28601 (828)244-3914 rhamby@uncc.edu

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Air Powered Engine ___________________________________________________________________________________

Air Powered Engine (Sophomore Design) o Machined air powered engine for competition by reading PTC Creo schematics

Attached Below are the schematics used to create the air engine. o First place for best accuracy and precision of engine with milling and tooling equipment o First place in competition for fastest engine at 7500 rpm for top end and low end of 2.5 rpm o Goal speed at top end: 5000 rpm o Goal Speed at low end: 5 rpm

Mouse Trap Race Car __________________________________________________________________________________ Mouse Trap Race Car (Introduction to Engineering)

o Designed and built Mousetrap powered race car with design constraints o Target distance was 20 ft. Team achieved 19 ft. 10 inches o Developed fully reports of BOM o Produced reports of construction design o Achieved all objects receiving first place