Mechanical Design Engineer
Resume:
Naresh Nidamanuri
Manchester, Connecticut
*********@*****.***
Visa status: H1b (4 years remaining)
SUMMARY
Extensive experience in product design of gas turbine engine components. Working with Cyient Inc. at East Hartford, CT, USA (Client is Pratt & Whitney). Specialized in Engineering design, Parametric modeling, Surface modeling, assembly, drafting, GD&T, Tolerance stack up analysis, FEA analysis.
TOOLS AND SKILLS
SIEMENS NX (NX9 & NX11)
SOLIDWORKS
PLM: TCE 10
GD&T (ASME Y14.5-2009)
TOLERANCE STACK UP
DFMEA
ANSYS 18.2
HYPERMESH
VBA
RRCA TOOLS
EXPERIENCE
CYIENT INC
Jan 2011 -
Present Design engineer
Creation of forging, casting, part level & module level drawings.
Parametric 3D solid modeling, product definition, assembly modeling and tolerance stack up analysis
Generate 2D/3D design models for stress and thermal analysis
Handled numerous Class1 & Class2 engineering changes (EC’s)
Document part design in Team center, MS PPT/Excel reports
Creation of Common interface coordination requirements (CICR).
Numerous cost reduction feasibility studies Forging to casting, tolerance relaxation on existing part dimensions, material change etc.
Dispositioned more than 1000+ eQN (Engineering quality non conformances) for Nicks, dents, scratches, GD&T
Hands on experience in Project Management, technical supervision, review of SOW, task effort estimation and offshore coordination activities
June 2005 -
Dec 2010 Analysis Engineer
Generating high quality finite element modeling and analysis of aero engine components.
Performing the structural FE analysis in the gas turbine component models to access their strength and durability (Preload, assembly, speed, thermal and all loads)
Completing Stress analysis reports and power point presentation for design review
Great exposure to IPD process and cross functional coordination
Worked on 2D/3D steady state and transient thermal analysis of turbine components (Convection and radiation modeling)
EDUCATION
May 2005 Bachelor of Technology in Mechanical Engineering
KL University India
Major: Mechanical engineering
September 2017 Master of Technology in Mechanical Engineering
JNTU India
Major: Thermal engineering
PROJECTS
War on cost program.
Cyient entered into Risk sharing partnerships with Pratt & Whitney to reduce cost of the existing designs. Worked as mechanical design lead in this program. Many class1 & class2 engineering changes are performed to realize potential cost savings.
Class1 Engineering changes:
Designed low cost bore scope plug (two-piece design to single piece)- cost is lowered by $233.Simple screw design and helical coil insert
Titanium ring: Eliminate puller lip feature, replaced rivet hole with Hi-lock holes
Proposed multi piece design for anti-vortex tube instead of single piece design
Class 2 engineering changes
Relaxed forging tolerances on bearing support component to reduce the cost of manufacturing by $2500
Update drawings to the actual design intent and correct drawing errors based on supplies feedback.
Tolerance modifications for V- band joins to reduce CMM inspection times
Responsibilities:
Review drawings for tolerance relaxation opportunities
Propose alternate designs options to reduce manufacturing cost
Make loop diagrams and then conduct tolerance stack up analysis to maintain critical gaps, min wall thickness, assembly (RSS, 1.73RSS, Worst case methods)
Evaluate critical fits
Preload calculations for bolted flange assembly, bearing stress calculations for bladed disk attachments, First order strength calculations
Perform DFMEA for all the proposed redesigns (estimate RPN’s, potential failure modes & design errors, and identify risk mitigation plans,
Participate in all design reviews and creating design substantiation memos
eQN (Engineering quality non conformances) dispositions
Objective of these tasks is to review quality non confirmation acceptance, provide the relevant substantiation and model the eQN geometry for structural analysis study.
Disposition of non-conforming Engine components in accordance with the Pratt and Whitney standards, including analyzing the non-conformance for fit, form, function, Engine manual, Repairability, Durability, and reliability etc, and communicating with quality and suppliers as required.
Nonconformance parts include rotating disks, shafts, cases, Knife edge seals, external components (Tubes, fittings, brackets)
Gather all relevant eQN data (from vendors) and required drawings
Decision making on QN acceptance, substantiating with tolerance stack up analysis
eQN’s include Nicks, Dents, Scratches, GD&T, dimensional (web & bore thickens)
Responsible for Quality checking of the Drawings based on PW standards
Continually reducing the Non-conformances by studying the Root cause (Fault tree analysis) and implementing the corrective action. It includes Statistical analysis, Process capability check (Cp, Cpk), Stack-up analysis, ClassI & Class II Engineering changes etc.
Prepare QN disposition package
Worked on more than 1000+ eQN’s
FT4000 LPC and HPC module conceptual and detailed design.
FT4000 is an industrial gas turbine engine and it is a SWIFTPAC package available both in single & twin-engine configurations. Cyient took risk sharing ownership of HPC front and rear cases components.
Performed parametric 3D solid modeling, Product definition, Assembly modeling and tolerance stack up analysis
Prepare bill of materials (BOM) & mass properties for FT4000 LPC & HPC module (250 Major components)
Creation of Forging and casting drawings
Responsible for Deciding the Tolerances and Machining Allowances. Interacted with Casting Vendors continuously for producibility issues
Creation of module level drawings
Basic stress and preload calculation for bolted joints
Managing the CICR documents
Developing 2D cross sections & 3D models for thermal and stress analysis
Creating workflows in team center.
Prepare Design substantiation memos
PW4090 HPC Rotor, R14-R15 TMF Rear Drum BOM & Redesign Structural analysis.
Project was initiated to understand and address the low cycle fatigue failures at the disk location, analytical support for root cause analyses was done and sub modeling analysis was performed at the load/lock slots for both aft & forward side to ensure the correct values of stresses.
BOM model has no ladder seal at load & lock slot by which hot flow is entering rim slot and producing thermal gradients and also it has high Kt slots. BOM analytical results match with field data. Hence several designs are iterated and finally came up with 360 Deg ladder seal and Low kt slots which improved the life significantly from 2000 life cycles to 25000 cycles
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