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Arc Welding 101: Updating WPSs and PQRs

May 12, 2014

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Q: We weld sheet metal to D1.3 requirements. Our current welding procedure specification needs to be updated. Our customers are asking for a separate WPS/ PQR [procedure qualification record] for fillet and groove welds. Until now I believe we had both fillets and grooves covered by one WPS/PQR....

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Bending Basics: Strategies for forming offsets

May 12, 2014

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If you pick the right offset tool for the job, you'll find you will be able to produce many different offset geometries quickly and safely.

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Spot-on safety tips

May 12, 2014

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Operating a spot welding machine safely requires operator care, proper training, and appropriate safety devices. Without these, you put yourself as risk for myriad injuries.

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Operator-friendly punching

May 12, 2014

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Modern punching machines are designed to be more operator-friendly, which is a bonus for today’s fast-paced shop floors. Learn just how these sophisticated machines have evolved ergonomically.

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Arc Welding 101: CV or CC - What’s the difference?

May 9, 2014

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Q: What is the difference between constant current and constant voltage? A: I’m often called on to explain this topic when I teach. Electric arc welding has two main variables: current and voltage. Welding machines will supply both, but they are capable of consistently maintaining only one of...

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Arc Welding 101: “Freestylin’” fab shops

May 8, 2014

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Q: I know of welding manufacturing companies that do not use welding procedure specifications (WPS), their welders are not qualified, and their welders inspect their own welds! How can these companies get away with this? Nelson M. A: I have been in many fab shops that lack documentation on...

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Arc Welding 101: Benefits of the CWI designation

May 7, 2014

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Q: I am trying to decide whether obtaining CWI designation would be beneficial to my career. I am presently unemployed and would like to increase my marketability to potential employers. I have a B.S. degree in metallurgical engineering plus over 20 years experience as a materials engineer in the...

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Arc Welding 101: D1.1 welder documentation

May 6, 2014

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Q: We have had guys certified for D1.1 for 15 years. But in the D1.1 book it says that they need to weld in every six-month period to keep their qualification current. What type of documentation do we need to keep on file to show that they have been welding? I cannot find this in the book, so I...

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Arc Welding 101: Minimizing defects from welding starts, stops

May 5, 2014

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Q: I am having trouble making welds that are all the same length when using GMAW. How can I create tie-ins that are all in line with each other and spaced out as they should be? Allen T. A: It is understood throughout the industry that most weld defects are attributed to weld stops and...

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Servo press serves best as a system

May 5, 2014

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Servo technology has been has been used as the drive system of servo-mechanical presses since 2000. Today stampers need to look at a servo press as part of a manufacturing system rather than just a standalone machine to maximize their cost-saving benefits.

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Arc Welding 101: Evaluating partial joint penetration grooves for welder qualification to AWS D1.1

May 5, 2014

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Q: How would you evaluate a flare V-groove joint for welder qualification to AWS D1.1? The standard is not clear on how to test the prequalified joint (B-P11-GF). Dale L. A: AWS D1.1 Subclauses 4.25 and 4.28, you’ll see that D1.1 for personnel qualification states that a complete joint...

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Metalworking throughout history

May 5, 2014

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Metalworking began long before the Iron Age, and welding has undergone its share of developments throughout the centuries. How much do you know about its history and evolution?

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Make way for the brew crew

May 5, 2014

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Craft beer is all the rage these days, and Crawford Co., Rock Island, Ill., has thrown its hat into the ring. After working closely with a local brewer who contracted the fabricator to build larger-capacity equipment, the two partnered to form a no-nonsense brewing division within the company to address the needs of the booming craft beer industry.

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Plasma cutting pipe in the water mist

May 5, 2014

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An Iowa pipe fabricating shop discovers it can eliminate secondary grinding on stainless steel material by adding water misting to its plasma cutting operation.

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Stamper rounds out automation suite with rigid transfer

May 5, 2014

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Stamping manufacturer A.J. Rose, Avon, Ohio, supplies precision-formed, deep drawn, metal products and assemblies such as transmission pistons, torque converter components, impellers, engine timing rings, ABS, water pump components, accessory drive pulleys, AC compressor clutch components, and numerous other powertrain components. The stamper needed the transfer system for a new transfer press to be robust and rigid to minimize tooling bar deflection and vibration. In addition, the system had to be compatible with existing tooling and to integrate well with a servo press’s variable speeds and modes

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