Modeling, Sensing and Control of Gas Metal Arc Welding

Modeling, Sensing and Control of Gas Metal Arc Welding
Author: Desineni S. Naidu
Publisher: Elsevier Science Limited
Total Pages: 351
Release: 2003
Genre: Technology & Engineering
ISBN: 9780080440668

Arc welding is one of the key processes in industrial manufacturing, with welders using two types of processes - gas metal arc welding (GMAW) and gas tungsten arc welding (GTAW). This new book provides a survey-oriented account of the modeling, sensing, and automatic control of the GMAW process. Researchers are presented with the most recent information in the areas of modeling, sensing and automatic control of the GMAW process, collecting a number of original research results on the topic from the authors and colleagues. Providing an overview of a variety of topics, this book looks at the classification of various welding processes; the modeling aspects of GMAW; physics of welding; metal transfer characteristics; weld pool geometry; process voltages and variables; power supplies; sensing (sensors for arc length, weld penetration control, weld pool geometry, using optical and intelligent sensors); control techniques of PI, PID, multivariable control, adaptive control, and intelligent control. Finally, the book illustrates a case study presented by the authors and their students at Idaho State University, in collaboration with researchers at the Idaho National Engineering and Environment Laboratory.

In-Situ Nondestructive Examination of Weld Penetration

In-Situ Nondestructive Examination of Weld Penetration
Author:
Publisher:
Total Pages: 0
Release: 1998
Genre:
ISBN:

The objective of this program is to develop infrared sensing techniques to monitor and control welding penetration in gas tungsten arc and submerged arc welding processes used by the US Navy in the construction of ships. The infrared sensor will provide in-situ, nondestructive weld quality information that can be used to correct depth of penetration prior to solidification of the molten metal pool. In this project the changes in surface thermal distributions resulting from intentionally induced perturbations during the welding process were measured using a low cost infrared sensor. This information was compared with the predictions of heat transfer calculations. A control system was constructed which utilizes the results of the predictions to model and control the weld penetration process. The ability to prevent plate burnthrough for variable gap and plate thickness variations was demonstrated.

Welding GAP Control Using Infrared Sensing

Welding GAP Control Using Infrared Sensing
Author:
Publisher:
Total Pages: 0
Release: 2001
Genre:
ISBN:

The objective of the research was to develop real-time infrared sensing techniques to monitor and control the Submerged Arc Welding (SAW) process utilized by the US Navy in shipbuilding. Infrared sensors were used to measure the front side surface temperature distribution of the sections being welded. Since the thermal profile in the vicinity of the weld is dramatically affected by weld perturbations, it is possible to identify the changes in thermal distributions and use this information to monitor and control weld gaps. The sensors thus provide in-situ non-destructive weld quality information that will improve both quality and productivity ̂resulting in a decrease in fabrication costs. Detailed heat and mass transfer modeling was conducted to predict the thermal distribution and matched with actual experimental measurements to improve our understanding and capability to model the welding process.

The Electrical Engineering Handbook,Second Edition

The Electrical Engineering Handbook,Second Edition
Author: Richard C. Dorf
Publisher: CRC Press
Total Pages: 2758
Release: 1997-09-26
Genre: Technology & Engineering
ISBN: 9781420049763

In 1993, the first edition of The Electrical Engineering Handbook set a new standard for breadth and depth of coverage in an engineering reference work. Now, this classic has been substantially revised and updated to include the latest information on all the important topics in electrical engineering today. Every electrical engineer should have an opportunity to expand his expertise with this definitive guide. In a single volume, this handbook provides a complete reference to answer the questions encountered by practicing engineers in industry, government, or academia. This well-organized book is divided into 12 major sections that encompass the entire field of electrical engineering, including circuits, signal processing, electronics, electromagnetics, electrical effects and devices, and energy, and the emerging trends in the fields of communications, digital devices, computer engineering, systems, and biomedical engineering. A compendium of physical, chemical, material, and mathematical data completes this comprehensive resource. Every major topic is thoroughly covered and every important concept is defined, described, and illustrated. Conceptually challenging but carefully explained articles are equally valuable to the practicing engineer, researchers, and students. A distinguished advisory board and contributors including many of the leading authors, professors, and researchers in the field today assist noted author and professor Richard Dorf in offering complete coverage of this rapidly expanding field. No other single volume available today offers this combination of broad coverage and depth of exploration of the topics. The Electrical Engineering Handbook will be an invaluable resource for electrical engineers for years to come.