Luis Ramírez, Mechanical Engineering

I design in SolidWorks and Creo, run the simulations, and write up every result. The full reports are all here, so you can check the work yourself.

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Selected work

Four projects I can walk you through start to finish.

Completed SolidWorks detailed drawing of the 5-inch housing cover: top view, Section A-A, Section D-D, auxiliary View C-C, right side view, and shaded isometric, with title block

5-inch housing cover, detailed drawing

I took a supplied SolidWorks model and turned it into a drawing a machinist could build from. Six views on one sheet define the stepped bore, the bolt pattern, and the side lug with nothing left to guess.

Top view, two full sections, an auxiliary view, a side view, and an isometric on one B-size sheet
8× Ø17/64 in mounting holes on a Ø4.750 in bolt circle
Dimensioned and toleranced per ASME Y14.5

Read the report (PDF)

ToolsSolidWorks

TypeDrawing package

Scale1:2

DrawnOct 2025

Four-leg Jansen walking mechanism

A four-legged walker built on Theo Jansen's eight-bar leg linkage, all driven from one crank. I pulled the motion data to check the gait with numbers instead of eyeballing the animation.

About 20 leg links, one degree of freedom, 60 RPM input
Paired legs run exactly out of phase for a stable gait
Out-of-plane motion stays at zero, so the mates are right

Read the report (PDF)

ToolsSolidWorks Motion

TypeKinematic simulation

DateFall 2025

Temperature plot on the underside of the aluminum heatsink, hottest at the central CPU contact patch

CPU heatsink thermal analysis

A steady-state thermal study of a finned aluminum heatsink under a 50 W CPU load, to see where the heat goes and where a fan would help most.

Peaks at 63.9 °C, below the 85–100 °C throttling range
Only 16.4 K difference across the whole part
Center fin channels run hottest, the best place to aim a fan

Read the report (PDF)

ToolsSolidWorks Simulation

TypeThermal FEA

DateDec 2025

Gyroscopic cup holder

A self-leveling cup holder for bikes and wheelchairs. Two gimbal rings let gravity keep the drink upright as the mount tilts. Team project with Ghazi Mustafa. I modeled both rings.

Printed and assembled in PLA for about $10
Printed fits came out too tight, so we revised the pin holes from 0.175 to 0.2 in
Design targets: cups 64–100 mm, under 1 kg total

Report (PDF) Thingiverse Thangs

ToolsSolidWorks, 3D printing

TypeConcept to prototype

DateFall 2025

Hands-on work

Lab work and projects from NJIT, most of it done as part of a team. Each one opens the full write-up, and I can walk you through any of them.

Design and simulation

Mechanical drive pulley supportStatic FEA: peak 19,190 psi against a 34,994 psi yield, safety factor 1.82PDF

Modular swing frameTrunnion-pivot table modeled from a reference drawing, with assembly drawing and BOMPDF

Roller chain and sprocket driveCreo bottom-up assembly, 20 parts, zero interferencesPDF

Testing and strength of materials

Tensile testingAluminum modulus measured at 69.9 GPa, 1.3% from referencePDF

Torsion testingSteel shear modulus measured at 78.1 GPa, 2.4% from referencePDF

Pure bending of a steel beamDeflection matched beam theory within 1.9% on averagePDF

Strain rosettes and Mohr's circleSix rosettes compared against bending and shear theoryPDF

Strain gauge bridgesQuarter, half, and full Wheatstone bridges on an aluminum beamPDF

Instrumentation and controls

Rotational speed measurement75 tachometer readings: 995.9 rpm mean, 2.13 rpm standard deviationPDF

RC filter signal conditioningLow-pass phase crossed −45° right at the 1.99 kHz cutoffPDF

Temperature sensors comparedThermocouple measured 40.4 µV/°C against the ~41 µV/°C standardPDF

Pipe flow and free jetOrifice discharge coefficient settled at 0.60–0.61PDF

PLC electro-pneumatic controlLadder logic running a two-cylinder sequence with no operator inputPDF

PID liquid-level controlHow each PID term shapes a real tank's responsePDF

Acoustic measurementDecibel measurement and the anechoic chamberPDF

Manufacturing and materials

Measurement and GD&T inspectionTeam lead. Inspected parts against drawing tolerancesPDF

CNC milling and G-codeWrote and ran G-code for two parts, with cycle-time mathPDF

Manual lathe machiningCutting force and heat measured across feeds and depthsPDF

Surface textureVibratory finishing cut roughness by up to 43%PDF

Heat treatment of carbon steelsHigh-carbon steel went from 19.1 to 61.0 HRC after a water quenchPDF

Metallographic microanalysisIdentified six unknown alloys from their microstructuresPDF

Steels and copper alloys researchProperty data compiled from the ASM HandbooksPDF

Penicillin manufacturing case studyHow industrial fermenters make an antibiotic at scalePDF

Experience

Automotive Parts Specialist

Jul 2025 – present

AutoZone, Newark, NJ

Test, install, and troubleshoot batteries, lighting, and other parts, using OBD-II scanners and vehicle specs to diagnose fitment and failures.

Field Engineering Technician

Aug 2021 – Apr 2023

Pittenger Paving & Excavating, Dunellen, NJ

Surveyed 20+ construction sites with laser levels to verify layout and tolerances, and ran skid-steers, rollers, and tampers on paving jobs.

EOP STEM Tutor

Jul 2024 – May 2025

NJIT, Newark, NJ

200+ hours tutoring first-year students in calculus, physics, and engineering.

Active Brother, Alpha Phi Omega

Sep 2025 – present

NJIT, Newark, NJ

Professional service fraternity. 60+ hours of community service so far.

What I work with

SolidWorksParts, assemblies, drawings, BOMs
SolidWorks Simulation and MotionStatic and thermal FEA, motion studies
Creo ParametricParametric parts and assemblies
MATLABCalculations and plotting
Engineering drawingsMultiview, section, and auxiliary views per ASME Y14.5
Microsoft OfficeWord and Excel for reports and data
English and SpanishFluent in both

Let's talk

If you're hiring for an internship or a full-time role, I'd like to hear about it.

luisramirez092905@gmail.com

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