save the date - aws detroit to contact me directly: 810-844-2800 or [email protected] wes...
TRANSCRIPT
1 SEPTEMBER TECHNICALMEETING
1 SAVE THE DATE: LADIES NIGHT
2 COMMITTEE CHAIRS
2 CHAIR’S MESSAGE
4 SCHOLARSHIP WINNERS
6 SEPTEMBER HOTLINE
7 EDITOR’S NOTE
8 ASK THE WELDINGENGINEER
September 2017
Inside This Issue
Follow Usawsdetroit.org
AWS Technical Nights are open toeveryone! We encourage thatmembers bring students and non-members to learn more about ourorganization and industry.
The AWS Detroit section promotes the welding industry by investing in studentswho are attending various universities, community colleges, and trade schools. Thisyear, AWS Detroit section was able to award scholarships over $60,000.00 to helpstudents succeed and promote tomorrow’s welding industry. Student night is acelebration honoring students, parents and teachers. We are very proud of thesestudents.
Come out and celebrate Scholarship night with us! We hope to see as manystudents as possible! The SchoolCraft VisTaTech Center is a great venue to celebrateyour success!
In addition to the formal speeches and awarding of scholarships, we have somethinga little different planned, and maybe a bit more value added for you, our guests. Mr.Phil Temple, our current District 11 director will be speaking about welding careersas well as some of our AWS Detroit Section Members. Everyone is welcome to attend.Being a member is not a requirement, and the event is open to all ages.
It will be a great event and we are expecting a sold out crowd. So please RSVP assoon as possible!
Annual Scholarship NightThursday, September 14, 2017Location: Schoolcraft College Vista Tech Center
18600 Haggerty Rd, Livonia, MI 48152Click here for Google Maps
RSVP to [email protected]
AGENDA5:30 - 6:00pm Welcome Reception & Networking6:00 - 7:00pm Dinner7:00 - 9:00pm Awarding of Scholarships9:00pm Adjourn
Cost: $20.00 for dinner. Free for college staff, award recipientsand their parents, spouse or fiancé, or a friend.
Ladies Night will take place on April14, at Motor City Casino Convention Centerand Sound Board. Please contact MarkGugel for Hospitality suite contactinformation. [email protected].
Interested patrons will want to be signup for rooms before they are all gone.
Save�the�Date
2018
Affiliated With
For AdvertisingOpportunities
Contact Don Crist810-217-9897
September 2017This Issue of the Bulletin
can be viewed on the web at
awsdetroit.orgWell, it’s September and another exciting year for the
AWS Detroit Section is upon us. Hopefully many of you putyour welding shield to good use and watched the solareclipse a couple of weeks ago. I would like to take theopportunity to thank the executive committee members
who volunteer their time, the companies who support us and individualmember participation.
September is home to our Student Night which will be held at SchoolcraftCollege. It seems like a distant memory now when I was in school and receivedscholarships from the AWS Detroit Section. The scholarship program is thecornerstone of our achievements. The investment in the matching fundsprogram has yielded a program that will allow us to contribute over $60,000towards students each year.
The 2017/18 scholarship program is a successful program for the DetroitSection. We now have on-line applications, making it easier than ever forstudents to interact with the program. We hope to continue our commitmentto students and also to our 1000+ members by offering valuable educational,networking and social events. We strive to achieve our mission of advancingthe science, technology and application of welding and allied processesincluding joining, brazing, soldering, cutting and thermal spray.
The great work done by this section is only possible from the volunteers,patrons, advertisers, supporting companies and great events like Ladies Night,Sheet Metal Welding Conference, Christmas Party, Golf Outing, TechnicalMeetings, Educational Seminars and other behind the scenes work. We hopeto increase our involvement by developing a Grant program this year thatwill directly help institutions trying to train, educate and inspire the fabricators,skilled trade and engineers of the future.
If you would like to further participate in the Detroit Section, please don’thesitate to contact me directly: 810-844-2800 or [email protected]
Wes DonethChairman’s Message
�Chairman
WESLEY DONETH
First Vice ChairMARK GUGEL
Second Vice ChairJOHN SUTTER
SecretaryDAVID BENETEAU
TreasurerANDRE YOUNG
Bulletin EditorROBIN MICHON
WebmasterRODNEY BEREZNICKI
Hotline Coordinator: BRIAN PETERSON
Meeting Reservations: AMANDA DAVIS
AdvertisingDONNIE CRIST
Assistants to Chairman:JOHN PIPPIN, JR.ERIC LICHTFUSZNATHAN MILLER
Nicolas Horton - Ferris State University
Susannah Kimberley - St Clair Co. CommunityCollege
Maria Cantin - Washtenaw Community College
Zack Horton - Ferris State University
Michael Fox - Ferris State University
Andrew Blalock - Washtenaw Community College
Ian Schwenke - Washtenaw Community College
Alexander Neal - Macomb Community College
Alex Draheim - Ferris State University
Justin Wolfram - Ferris State University
Levi Woods - Ferris State University
Thomas Vaughn - Ferris State University
Leah Clifton - LeTourneau University
Troy Bearden - Ferris State University
Zeke Miller - Ferris State University
Sean Walkowski - Ferris State University
Michael Kreuzer - Ferris State University
Bret Parks - Ferris State University
Jeffery Revard - Ferris State University
Garrett Lindgren - Ferris State University
Joseph Carney - Ferris State University
John Campbell - Ferris State University
Brian Hitts - Ferris State University
Brian Favier - Ferris State University
Megna Christian - Ferris State University
Keagan Cottick - Ferris State University
Lindsay Nye - Pennsylvania College of Technology
Katherine Russell - Michigan Technological Univ.
Joel Beckham - LeTourneau University
Joshua Zuckerman-Erd - Ferris State University
Dalton Benner - Ferris State University
Raymond Pippin - Northern Michigan University
Cory Biltz - Pennsylvania State University
Randi Nord - Oakland Community College
Jacob Cobb - Ferris State University
Congratulations to the Detroit Section2017 – 2018 Scholarship
The scholarship recipients are all invited to attend our September Technical Meetingas a guest of the Detroit Section so they may receive recognition of these awards.
This year the AWS Detroit Section has awarded38 welding scholarships totaling $60,000. Thesescholarships are made available to Michigan residentsand/or students enrolled in a welding or welding relatedprograms at a college or university in the State of Michigan,and the following counties in the province of Ontario;Essex, Chatham-Kent, and Sarnia-Lambton. The candidatesall submitted an application, including transcripts of theiracademic achievement, a brief letter about theirbackground, their goals and ambitions, and any additional
factors that would help the Section Scholarship Committeedetermine eligibility for an award.
The scholarship process for the 2018-2019 school yearwill begin in December 2017. This is a program of utmostimportance to the Detroit Section and feedback and ideasfrom all concerned is greatly appreciated.
Donald F. Maatz, Jr.Section Scholarship Chairman
Ferris State University LeTourneau University
Macomb Community CollegeMichigan Technological University
Northern Michigan University Oakland Community College
Pennsylvania College of Technology Pennsylvania State University
Schoolcraft Community CollegeSt. Clair County Community College Washtenaw Community College
Wayne County Community College District
The 38 recipients of the 2017 – 2018 Scholarships will be attending:
2017 – 2018 American Welding Society-Detroit Section Scholarship WinnersAWS-Detroit Section, District 11 Fred Ellicott Scholarship for Arc Welding
Nicholas Horton – Ferris State University – Welding Engineering Technology
AWS-Detroit Section, District 11 Dietrich Roth Scholarship for Resistance WeldingTy Lattimore – Ferris State University – Welding Engineering Technology
The Amos and Marilyn Winsand Scholarship, funded by the AWS Foundation,was awarded to Codylee Turrell, Ferris State University.
The Robert L. Wilcox Scholarshipwas awarded to Michelle Riley, Schoolcraft Community College.
The James W. Mitchell Scholarshipwas awarded to Ty Lattimore, Ferris State University.
New ProductsRobacta TC2000 torch cleaner, forautomated ferritic applicationsCleaning the robotic torch of your weldingapplication will now be a breeze when usingthe Robacta TC2000 torch cleaner. A complete,compact, contact free, automatic robotic
torch cleaner solution that enhances productivity, and maximizesconsumable life with minimum maintenance. The Robacta TC2000 willintegrate into any existing robotic cell.Get it now for the low packageprice of only $4496.40*. Use PROMO CODE 108304. Watch the video:http://bit.ly/2vFsBQb *Valid only in the USA
CenterLine Welcomes New Account ManagerWindsor, Canada, August 1, 2017. CenterLine (Windsor) Limited isvery pleased to announce the addition of Mr. Kyle Smith to the positionof Account Manager. Kyle has nearly five years of sales, customer relationsand weld support experience in the automotive
September Hotline
continued on next page
and medical industries.Prior to coming to Cen-terLine, Kyle held salespositions with OPS Solu-tions, RoMan Manufac-turing and RoMan Engi-neering Services. Thesepositions enabled himto gain experience
implement ing sales strategies, securingnew accounts and meeting sales objectives. During his time with RoManEngineering Services, Kyle was contractedfor two years with Fiat Chrysler AutomobilesCenter of Compliance to assist with newmodel launches. He is a graduate of CentralMichigan University with a major in mar-keting and concentration on professionalsales. As Account Manager, Kyle will berepresenting CenterLine brand productsand services within the U.S. market.
Co-op Welding Students,Summer Interns andPart-time Welders
Contact Pat Bell:[email protected] (313) 282-8171 in Detroit
Welcome back AWS Detroit members! Where did summer go? WOW! Are youready for a new season? This is my sixth year as editor of the AWS Detroit e-bulletin, and for the first time since I started as the editor, I feel a little lost this year.Perhaps, it’s because I stepped out of my comfort zone and jumped into a morechallenging position at a new employer. Or maybe, it’s because I know that we(AWS Detroit) have a lot of new challenges this year, and big goals. We’re alwayslooking for people to interact and share their knowledge and experience withinour section and our community. Wes mentioned the new Grant program this yearthat we are aggressively under taking. Yes, we want to make a difference in ourfuture. Whether it’s the scholarship program that provides for our students goingto college and tech schools, or the community grants that provide for education inthe trades. We’ve got a lot of hard work ahead of us, but a lot of opportunity foroptimism as well.
Come out and join us at one of the technical meetings! You don’t have to be amember and we welcome everyone! It’s a great opportunity to network and learnsomething new.
And, until next month… KEEP ON WELDING… Robin
September HotlinecontinuedEditor’s Notes
“Which type of transformer isbetter for the resistance spotwelding of sheet metal,
especially the new high-strengthmaterials that are becoming morecommon, AC or MFDC? I ask as Ihave an old AC machine that runsgreat and has handled everything Ihave thrown at it so far?”
“In the past three columns we haveprovided a brief overview detailingthe migration of resistance spot
welding (RSW) power supplies fromalternating current (AC) to Medium-Frequency Direct Current (MFDC). Thefirst column (Mar-17 ATWE) discussedsome of the motivation for this changeand provided just a bit of historicalcontext. The second column (Apr-17ATWE) took a look into several of thefacility and tooling considerations thatone would need to be aware of whendealing with either type of power supply.This column also acknowledged that itwas not initially easy to switch from ACto MFDC. But the sales data referencedin our initial column reveals that theseissues are now essentially behind us aspresent MFDC sales beat out AC by almost20:1. For our third column (May-17 ATWE)we looked at a very specific benefit relatingto the utilization of the MFDC powersupply as it relates to the tooling, andthe effect that its wider secondary currentcapability had on tooling design, andyour needed spare parts inventory. Inthis column we will take a brief look atthe migration of the MFDC unitsthemselves, and make a few quickcomparisons to a comparable AC unit.One of the first items of note with regardsto the initial MFDC units that came onthe market compared to their brethrenof today is that the designers have reallymade the latest iterations much moreefficient. And no place is this efficiencymore apparent than in the area of theiroutput for a given mass. For our purposesthis will be measured simply as kVA/kg.So how much have things changed? Unitsfrom only 15 years ago might be in thearea of <3 kVA/kg. Today? It is nowcommon to find the latest models comein at 7 kVA/kg. In real world terms thatmeans a modern 225 kVA unit might fitinto a space no bigger than 6” x 7” x
19”, and have a weight of no more than110 pounds. In a word, wow!While the modern MFDC unit has takena bit of time to become more efficient, ithas never lost its primary demandelectrical advantage when compared toan AC unit. The numbers below reallyspeak for themselves when it comes tothe primary current demand for eachtype of power supply.AC: 1� 480; 100 kVA AC; 100,000/480v @50% = 208A; 208A * 0.707 = 147Acontinuous into the transformer. (0.707used for RMS conversion)MFDC: 3� 480; 100 kVA MFDC;100,000/650v @ 50% = 154A; 154A *0.707 = 108A continuous into thetransformer; 108A * 0.81 = 88A drawnfrom each leg(650v as you deal with peak voltage;0.707 used for RMS conversion; 0.81conversion to split into 3-legs)But an MFDC unit has other advantagesand/or differences over a comparable ACunit:• A review of two previous columns (Jan-16 & Feb-16 ATWE) will reveal thatsecondary loop total impedance andconductor sizing are critical for anyresistive welding process. Recall thatImpedance (Z) consists of twocomponents: Resistance (R) and InductiveReactance (XL). Well, imagine if theInductive Reactance (XL) could benegated. Welcome to the world of MFDCresistance welding. Once one removesInductive Reactance (XL), literally fromthe equation, the sizing process takes ona whole different point of view and opensup possibilities with regards tooling designand packaging that were not even possiblejust 20 years ago. However, there is onearea where the Inductive Reactance (XL)cannot be ignored, even for an MFDCunit, and that is when secondary currentis initially starting to flow. But this topicis going to have to be the subject of afuture column as this one item alone hasbecome a hot-button issue with the RWcommunity. Stay tuned…• It goes without saying that the func -tionality and capability of a modern weldcontrol is really straight out of sciencefiction. The ability to sense a multitudeof parameters (primary & secondarycurrent, secondary resistance, and others)
and then to be able to adjust the control’soutput while the weld is being made isjust amazing. But how quickly can thisbe done? With an AC system you arelimited to 60 Hz. But not so with an MFDCsystem. With integrating periods startingat 400 Hz and climbing up from there(10 kHz anyone?), it really does seem thatin this arena the game is just gettingstarted.• The constant polarity of an MFDC unitcan be either a help, or a hindrance, whenit comes to the RSW process. The AC unit,with its switching polarity, can offer astable and even heating situation, andthis can translate to more even wear onthe electrodes. But sometimes this evenheating is not preferred as it is desired todraw heat closer to one electrode than theother. The uneven heating associatedwith the constant polarity of an MFDCunit is known as the Peltier Effect. The netresult is that by placing the positive electrodeagainst the surface where extra heat isdesired, you can help draw the recast struc-ture of the weld in the needed direction.But this can also lead to acceleratedelectrode wear. As the saying goes, thereis no such thing as a free lunch.• The current profile of an AC unit is, byits very definition, much different thanthat of an MFDC unit. The inter-cyclecooling associated with the AC sine-wavecan have an inherent cooling effect thatis not possible with MFDC. That is unlessone pulses MFDC in a very aggressivemanner. This inherent difference betweenthe two types of power supplies is onepoint that folks make when debating theweldability difference between AC andMFDC, and will part of a future discussion.With the aforementioned in mind, weare now getting much closer at trying toanswer the question we were originallyasked – Which is better for RSW, an ACor MFDC power supply.The author gratefully acknowledges theassistance of Greg Angel of RoManManufacturing Inc.If you have more questions about this topic, ContactDon Maatz at R&E Engineering Services; A subsidiaryof R&E Automated Systems, LLC; 70701 PowellRoad, Bruce Township, MI 48065; (586) 228-1900– Office; (734) 793-2304 – [email protected]:1) Resistance Welding Manual, revised 4th Edition
s
Ask the Welding EngineerBy Donald F. Maatz, Jr.
A:
Q:
This article is a continuation of the May-2017‘Ask the Welding Engineer’
