NgaiChung Lau, Portfolio

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Ngai Chung Lau- Mechanical Engineering Portfolio- [email protected] +1 (951)756-2019 / +852 6113 2798

Mechanical Engineering Design

Portfolio

Ngai Chung Lau (B. Mechanical Engineering)

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Index

1 CONTENTS

2 About Me ....................................................................................................................................................... 1

2.1 Summary ................................................................................................................................................. 1

2.2 Education and Qualification ................................................................................................................ 1

2.3 Work Experience .................................................................................................................................... 1

2.4 Achievements ........................................................................................................................................ 2

2.5 Skills ........................................................................................................................................................... 2

3 Mechanical Design Components .............................................................................................................. 3

3.1 Q3-Service Cases Wedge Master Shelf .............................................................................................. 3

3.2 Q3 Series Case Alignment Issue ........................................................................................................... 5

3.3 R3 Service Master Shelf and Finite Element Analysis (FEA) ............................................................... 7

3.4 Bakery Case Service Master Shelf ....................................................................................................... 9

4 Project Management ................................................................................................................................. 10

4.1 Wire Rack Project ................................................................................................................................. 10

4.2 Missed Wire Diagrams on PLM System .............................................................................................. 12

4.3 Joint Trim Check Sheet Project .......................................................................................................... 13

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2 ABOUT ME

2.1 SUMMARY

Passionate about designing, proficient in CAD modeling and Drafting with 1 year working experience

in designing sheet metal in Solid Edge as contract engineer at Hussmann, which provide display

merchandisers, refrigeration systems, installation and services to food retailers worldwide. Proven

ability to successfully and simultaneously manage multiple design projects within or ahead of

schedule. Ability to review designs, and look for improvements to reduce cost and assembly time.

Core competencies include:

Engineering documentation

Estimating part cost

Finite element analysis (FEA/FMEA)

Multiple CAD software knowledge

PLM- Team Center

Project Management

Career Summary:

Made design changes on over 1,000 parts.

Modified and updated over 1,500 engineering drawings.

Created over 80 prototypes and submitted to manufacturing factory for testing.

Designed and created more than 100 new sheet metal parts and 10 master parts in 3D CAD

program Solid Edge ST6.

Checked and updated Bill of materials (BOM) using Bann, an enterprise resource planning

(ERP) software.

Created Process Requests (PR) and assigned Engineering Change Notices (ECN) using Product

lifecycle management (PLM) Team Center.

Managed over 1,000 ECNs and assigned them to corresponding designers.

Assisted Engineers to build testing model structures on Team Center. Tested and looked for

solution on accelerating ECN completion process time.

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2.2 EDUCATION AND QUALIFICATION

Bachelor of Science in Mechanical Engineering Aug 2012 – May 2016

California Baptist University, Riverside, CA GPA: 3.3

2.3 WORK EXPERIENCE

Hussmann Corporation, Chino, CA

Temporary Engineer August 2016 –Dec 2016

VAVE Q3-Service Cases Wedge Master Shelf

- Designed and delivered new concepts to Engineering Leads.

- Reduced total shelf parts from 8 parts to 3 parts

- Enhanced total performance and fulfilled engineering and marketing requirement.

Q3 series Case Alignment Issue

- Designed and presented 4 concept designs to Engineering Leads.

- 3 concept designs fulfilled engineering and marketing requirement.

- 2 concepts designs were built as prototypes and pending to test.

VAVE R3, Q-DV and BC Cases Master Shelf Project

- Designed new master shelf for display cases, reduced shelf parts from 7 pieces to 1 piece.

- Maintained same performance as original design.

- Greatly reduced assemble time and total cost.

VAVE Q-Series Project

- Designed new panel and bracket for Q1-SS & Q3-SS cases.

- Reduced material cost by 20% and assembling time by 30%.

Wiring Diagrams Project

- Assisted electrical engineer to update hundreds of wire diagrams.

- Revise and updated diagrams to PLM system.

Joint Trim Check Sheet Project

- Designed new joint trims for existing case models.

- Created exploded views of 30 case models in Solid Edge ST6.

- Created In and Out lists of 30 case models to configuration team for BoM.

- Revised, redesigned and updated 30 check sheets to PLM system.

Shelf Project, researched to minimize all shelfs’ cost.

Team Center Super user, Designer and Change Specialist.

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Engineering Intern June 2016 - August 2016

Accelerated engineering processes as being a role of Change Specialist on PLM system.

Delivered tasks and created Engineering Change Notices to designers.

Drafted Method of Assembly for the display cases.

Revised drawings and made changes on designed products in Solid Edge ST6.

California Baptist University, Riverside, CA

Mechanical Engineering Undergraduate Assistant May 2014 – June 2014

● Supported operations at manufacturing research center.

● Increased the utilization of laboratory resources by 40%.

AutoCAD Undergraduate Grader Oct 2013 – Dec 2013

● Delivered weekly class reports in a timely manner.

Sun Fat Electric Products (Intl.) Co., Ltd, Hong Kong

Summer Engineer July 2012 – Aug 2012

● FEA and structure calculation for an evaporative mini-air cooler fan.

● CAD design on evaporative mini-air cooler fan.

2.4 ACHIEVEMENTS

Project, Underground Water Source Detector, California Baptist University 2016

● Developed a water source detector with Geophones, using off-center mass technique.

● Designed mechanical components in Auto Desk.

Project, Free-Fall Water Alternator, California Baptist University 2013

● Designed all necessary mechanical and electrical components in SolidWorks.

● Assembled and tested prototype system.

● Integrated a rechargeable battery and demonstrated capability by powering a light bulb.

2.5 SKILLS

Engineering Software: Auto CAD, Auto Desk, Lab view, SolidWorks, Solid Edge, Team Center

Computer Language/ Operating System: C++, MATLAB, Microsoft Office

Languages: native in Cantonese, professional in English and Mandarin

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3 MECHANICAL DESIGN COMPONENTS

3.1 Q3-SERVICE CASES WEDGE MASTER SHELF

Problem Statement

The dimension from the original shelf design was fixed. The shelf was unable to slide and adjust on a

wedge key rail attached on the case. Engineering, manufacturing and marketing Leads requested

an engineering solution to design a high performance shelf.

Shelf was unable to adjust. It

was causing a huge labor

cost and time for assembling.

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Solution Provided

Delivered and presented a new concept design to engineering leads.

Designed and built two prototypes with clearance for adjustment.

New design was able to slide on wedge key rail.

Reduced to 3 total parts from original 7 parts for shelf.

Prototypes were built and applied on Q3-DV 22.5 Case. New design brought out flexibility and high

performance to slide and adjust after attaching on the key rails of the display case. New design also

contained high strength for supporting 230 lb. force load. It also provided high visibility for customers

to see through products under the shelf.

Result

Engineering solution fulfilled and approved by Engineering, manufacturing and marketing

departments. Design concept can be applied on all wedge-series cases for future improvement.

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3.2 Q3 SERIES CASE ALIGNMENT ISSUE

Problem Statement

The Brackets for case-to-case alignment did not align properly due to whole case sheet metal

bending factors and assembly errors on manufacturing factory. Manufacturing building line required

extra time putting two cases together. Request was received to deliver an engineering mechanism

solution. No constrains were mentioned.

Solution Provided

Note: The size of original design was 1.1’ x 1.03’ 2.166’ and new design should maintain inside the

front cover.

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Four concept designs were created after model cases investigation:

Design 1:

Reduced holes on right

side to. 187ø. Created ‘X’

slot on left bracket

Design 2:

Reduced holes on right

side to. 187ø. Created total

of 7 holes on left bracket,

with .252 inch few from

center and 60 degree

angle each

Design 3:

Reduced lower holes on

both side to .375ø. Created

.187ø X.3 horizontal slot on

right bracket and .187ø X.3

vertical slot on left bracket

Design 4:

Created new bracket

with 2 round slots.

Connecting 2 brackets

with a beam. Add

washer to increase up

down distance.

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Results

Design 3& 4 got approved from engineering leads and were submitted to fabricate prototypes.

Testing and review was pending.

3.3 R3 SERVICE MASTER SHELF AND FINITE ELEMENT ANALYSIS (FEA)

Problem Statement

Original shelf contained 7 sub-parts. Engineering department requested an engineering solution that

to reduce total sub-parts, cost and assembly time.

Solution Provided

Designed a new master shelf with reducing total sub-parts from 7 to 1 piece, materials in galvanize

and stainless steel.

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Old-New Shelf Comparison:

Finite Element Analysis (FEA):

Shelf Material: 2750008, .071 MIN G60 GL. Simulating as the shelf was fixed on two brackets at the back and received a

230lbf evenly down on the surface. Yield Stress was at 38 ksi and it passed the FEA

Results

Master shelf got approved from engineering and manufacturing lead. 4’, 5’ and 6’width with 10” and

12” length solid and glass see-through R3 case shelfs were created base on the master shelf.

Concept was also applied on other model cases’ master shelf projects.

New design built in one piece of

sheet metal and provided same

strength as the old design. Assemble

time and labor cost was greatly

reduced.

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3.4 BAKERY CASE SERVICE MASTER SHELF

Problem Statement

Original shelf contained 7 sub-parts. Engineering department requested an engineering solution that

to reduce total sub-parts, cost and assembly time.

Solution Provided

Applied the same design concept as R3 case master shelf but followed all constrains as of the

original BC shelf.

Old-New Shelf assembled on Bakery Case:

Results

Master shelf got approved from engineering and manufacturing lead. 14 child shelves were created

base on the master shelf. Concept was also applied on other model cases’ master shelf projects.

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4 PROJECT MANAGEMENT

4.1 WIRE RACK PROJECT

Problem Statement

Wire Racks were fabricated by other companies. Engineering department found a new supplier and

would like to compare the cost. However, most wire rack engineering drawings was out of dated

and did not have 3D model. It made confusion for new supplier to follow direction. Engineering

department required to complete a detail package for all wire racks included engineering drawing,

DXF and IGS files. Only wire rack part numbers were listed in corresponding case type, 3D models,

PDF, DXF and IGS were missing.

Solution Provided

Checked with PLM system Team Center and located existing wire racks. Prepared an excel sheet and created a

checklist for each wire racks.

Created all missing 3D models, DXF, IGS and PDF with updated information on each individual wire

rack.

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Completed excel sheet and zip files for each cases.

Results

New Supplier was able to follow the package and offered their price to engineering department.

Engineering department compared the cost difference between two suppliers and pended for

further decision.

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4.2 MISSED WIRE DIAGRAMS ON PLM SYSTEM

Problem Statement

Company swiped to different PLM system at 2013 and majority of the engineering data were missing

or not up-to-date. Wire Diagrams of many display cases did not exist on the new PLM system.

Manufacturing factory was not able to receive updated wire diagrams, which created a huge

amount of building errors. Whole production process was delayed and it caused extra labor cost and

time as scheduled.

Solution Provided

Assisted electrical engineer to locate corresponding wire diagrams in company’s in-network storage

driver. Created excel sheet to identify which wire diagrams were missing on PLM system. Created PRs

and assigned ECNs on PLM system. Updated over 100 wire diagrams with new engineering template.

Uploaded all updated wire diagrams in .pdf formats on PLM system.

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Results

Successfully delivered all first priority wires diagrams to PLM system. Manufacturing production lines

were able to get updated drawings on their system.

4.3 JOINT TRIM CHECK SHEET PROJECT

Problem Statement

Manufacturing factory required to follow joint trim check sheet when putting display cases together.

Joint trim check sheet gave details information for all essential parts such as trims’ part numbers,

quantities, and direction where the corresponding joint trims located. Engineering department and

BoM specialists reported many check sheets were outdated. Trim part numbers, quantities were

incorrect and misleading. It made new employees hard to follow.

Solution Provided

Worked with engineering configuration team and manufacturing engineer and located outdated

check sheets.

Updated over 30 engineering drawings for Joint Trim Checklist

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Created joint trim explored view for 30 cases

Created new joint trims as required from manufacturing engineers and released parts on PLM

system

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Corrected and Confirmed the Item description, part numbers and quantities in each check

sheets

Created IN and Out List for each check sheets and submitted to BOM Specialists

Results

Fulfilled Engineering and Manufacturing department needed. Responsible to update check

sheet when new parts are designed and provide in and out list for engineering configuration

team.

NgaiChung Lau, Portfolio

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