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Arc Welding 101: Tackling trim in pulsed MIG welding

October 1, 2014 | By Paul Cameron

Q: We use the pulsed-spray-transfer GMAW process in our shop. When setting weld voltage, we can adjust the trim between 0.5 and 1.5. What do those numbers mean, and how do they relate to weld voltage?Corey G. A: Pulsed-spray-transfer welding equipment has challenged the conventional wisdom we’ve...

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Arc Welding 101: Which welds need visual inspection?

September 30, 2014 | By Paul Cameron

Q: We work on off-road and lifting equipment, and our welders are qualified per AWS D1.1. Which welds are required to be inspected visually and by whom?Ed Z. A: When you asked which welds are required to be inspected visually, I had to snicker. There was a time in my life when one side of my hard...

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Arc Welding 101: Addressing linear porosity

September 29, 2014 | By Paul Cameron

Q: We are experiencing linear porosity at the furthest point of penetration when welding heavy plate. The porosity is 0.3 mm dia., but it occurs regularly in every weld we’ve sectioned so far.We are using a semiautomatic spray transfer process with a 0.045-in. ER70S-6 electrode, and a shielding...

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Arc Welding 101: Three keys to a successful CWI

September 26, 2014 | By Paul Cameron

Q: I was recently interviewed by a writer who was researching how welders make the transition to certified welding inspectors (CWI). One of the questions he asked was, “What key skills make for the best certified welding inspector?” A: Communication—written, photographed, or verbal—is the...

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Arc Welding 101: Globular-transfer mode for MIG

September 23, 2014 | By Paul Cameron

Q: I am employed as an AWS D.1.1-qualified welder at a machine shop. I was wondering why you can certify on 75 percent argon/25 percent CO2 when you are not allowed to use a short-circuit transfer on materials over 3/16 in. You need at least 83 percent argon to obtain a spray transfer, yet I passed...

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Arc Welding 101: Achieving a good work lead connection

August 29, 2014 | By Paul Cameron

Q: What makes a good ground connection, and why is it important? A: In a welding circuit, current needs to pass through as few connections as possible, and the circuit itself needs to be as short as is practical. On the positive (+) side for gas metal arc welding (GMAW), direct-current electrode...

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Fabricator delivers a big fish story

August 28, 2014 | By Dan Davis

Lou Rodriquez finds out he has a talent for creating metal art and ends up with a fish tale that is easy to believe because people can see the result: a huge metal sturgeon that’s the talk of Port Huron, Mich.

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Arc Welding 101: Reading between the lines of AWS D1.1

August 27, 2014 | By Paul Cameron

Q: I am a weld inspector and one of my clients builds control panels. A potential customer of theirs requested that they conform to AWS D1.1 standards on a control panel. This seems odd to me. Can a company become AWS D1.1-certified? Is there a certain process they have to go through to become a...

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TIG welding: When looks matter

August 18, 2014 | By Marcia Sommer

Every GTAW bead tells a story. Learn how to identify what your weld bead says and make adjustments to amperage, travel speed, and consumables to ensure your GTAW bead tells the story you want it to.

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Success breeds success as hardbanding service provider evolves into equipment vendor

July 21, 2014 | By Eric Lundin

When Dave Milo set out to build a portable hardbanding unit, the former trucking company owner knew little about welding and nothing about hardbanding. After updating the hardbanding unit design a few times with consulting help from Lincoln Electric, Milo thinks he’s ready to change direction. Rather than providing hardbanding services, his goal is to sell hardbanding machines.

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Hope dies last

July 9, 2014 | By Amanda Carlson

A hard-nosed welding instructor at a medium-security prison in rural North Carolina gives his students discipline, confidence, a foot in the door to a trade, and the possibility for a new life upon release.

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Consumables for high-amperage welding

July 7, 2014 | By Dan Imus

High-amperage welding, whether in semiautomatic or robotic applications, pust a great amount of stress on welding consumables. By following a few tips, however, a welder can extend the life of these components.

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FAB 40: Merrill Fabricators’ welding school fuels local talent base

June 19, 2014 | By Tim Heston

Merrill Fabricators takes an innovative approach to the skilled labor crisis, by launching and growing its own welding school not only to fill its own ranks, but also to help grow the broader manufacturing community.

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No secret code for successful code welding

June 16, 2014 | By Dan Davis

Being a code welding shop with an ever-expanding customer base continuously challenges Andy J. Eagan Co. Inc., Grand Rapids, Mich. New customer projects and keeping on top of certification demands require a talented and dedicated workforce. As a result, that’s where the company puts a lot of its focus.

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Arc Welding 101: When to use updated AWS D1.1

June 2, 2014 | By Paul Cameron

Q: I currently use the AWS D1.1-2006 edition and was wondering if I should get the 2010 edition. Dan C. A: Take a look at Section 4.2.1 of your D1.1-06 edition, referred to as “Clause” in later editions. It states, “The use of earlier editions shall be prohibited for new...

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