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Author
Articles written by Elia E. Levi
Results: 13
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Validating processes, procedures, and productsThe relatively new concept of validation likely will be used more and more by customers and certifying agencies to ascertain that all conceivable means were used to guarantee that a manufactured product indeed meets all requirements, including hidden characteristics not readily verifiable. This article gives an overview of typical applications.
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Where is the welding management?Skilled, responsible welders can be expected to perform tasks to which they are accustomed very well. But when a brand-new project comes in, management should be careful not to give welders responsibilities they are not prepared to take. They need more than encouragement and sympathy.
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Salvaging damaged shaftsShafts are critical components of many machines, and a damaged shaft can hamper or halt production. Some failed shafts can be repaired and others can't. This article can help you determine which can be repaired and what to consider when attempting repairs.
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Planning a career in welding: A young person's guideWelding can be a rewarding career. To be successful and satisfied in welding or any career requires planning, preparation, and pursuing a job you love. This article provides an overview of welding as a career, describes different opportunities, and lists resources that can help you to become a welder.
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Joining incompatible materialsCertain metal combinations cannot be joined successfully with fusion welding. Deciding how to join them requires examining options, including potential material substitutions and process possibilities. This article discusses these options and offers a blueprint for the best solution.
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Promising welding innovationsTranslating any good idea into a practical innovation through research and development can require much persistence, dedicated effort, essential investment, and a long time. This article looks at three welding and joining innovations—hybrid laser arc welding, electron beam welding in air, and NanoFoil® joining—with decades-old roots that still are struggling for widespread acceptance.
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Arc welding discontinuitiesWelding discontinuities can affect product performance and longevity. Thoroughly understanding the various defects, their causes, severity, and remedies can help ensure high-quality and superior performance. This article presents an overview of welding defects and discusses design strategies to help prevent them.
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How to perform tack welding successfullyTack welding, a necessary preliminary step in many welding projects, must be performed correctly to achieve optimal results from the final weld and to minimize part defects. Quality is as important in tack welding as it is in the final weld. This article describes proper tack welding conditions.
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Reverse engineeringTypically, the idea for a fabricated product evolves into a manufacturing project from a complete set of engineering documents that define the product's scope, function, and limits and express its requirements. However, occasionally the necessary supporting documentation is unavailable and must be reconstructed.
For example, you might want to study an old sunken Roman or Viking vessel to gather information on ancient materials and technology and to understand a past civilization. |
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Fatigue FailuresFatigue causes the majority of mechanical element failures in structures and machinery. It is important to understand the causes of the failure and how to prevent or repair it.
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Incorporating beveling economicallyWhile beveling is known as a common procedure used to shape the edges of thick plates or pipes for welding, not everybody knows how to make the process cost-efficient in the overall welding operation.
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Design for welding: Letter to an engineer |
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Weld repair—Analyze the failure before attempting the repairWhen something breaks, you acknowledge the shock, scratch your head, take stock of the situation, and look for the fastest way to repair the item and put it back into operation. The pressure to repair quickly is understandable, but common sense suggests stopping for a moment and trying to understand what caused the break before attempting the repair.
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