Weld Quality: The Role of Computers

Weld Quality: The Role of Computers

Proceedings of the International Conference on Improved Weldment Control with Special Reference to Computer Technology Held in Vienna, Austria, 4–5 July 1988 under the Auspices of the International Institute of Welding

1st Edition - January 1, 1988

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  • Author: Unknown Author
  • eBook ISBN: 9781483146843

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Description

Weld Quality: The Role of Computers documents the proceedings of the International Conference on Improved Weldment Control with Special Reference to Computer Technology, held in Vienna, Austria, 4-5 July 1988, under the auspices of the International Institute of Welding. The topics of the four sessions are: (I) Design, Calculation and Prediction Models For Metallurgical Processes/Conception; (II) Inspection and In-Service Monitoring; (III) Fabrication, Quality Assurance; and (IV) Expert Systems, Data Banks and Future Possibilities. Session I includes papers on the use of computer technology to establish the quality of the welded joints; computer-aided design system for design of fillet welds with optimum shape; and the use of numerical simulation software for predetermination and optimization of the mechanical resistance of brazed joints. The papers in Session II cover topics such as acoustic emission testing; eddy current inspection system for weld testing; and holographic imaging of weld cracks. Session III includes papers on a computer controlled friction welding system and a CAQ-system for welding workshops. The presentations in Session IV include an approach for writing conventional software and expert systems for welding engineers and an expert system for robotic welding.

Table of Contents


  • Preface

    Foreword

    List of Papers

    Session I Design, Calculation and Prediction Models for Metallurgical Processes

    I.1 Improved Weld Quality with Special Reference to Computer Technology. The Design Function

    Abstract

    Introduction

    The Process of Design

    Sources of Uncertainty in Experimental Results

    Sources of Uncertainty in Practice

    Provision of Design Data by Computer Technology

    Expert Systems in Design

    Conclusion

    References

    I.2 Computer-Aided Design System for Fillet Welded Joints

    Introduction

    Conclusions

    References

    I.3 Design Stress for Plate and Shell Welded Connections: Concept, Definition and Improvement

    Abstract

    Keywords

    Introduction

    Stress Analysis

    Stress Concentration and Hot Spot Stress

    Computer, Numerical Analysis and Design Stress

    Conclusion

    References

    I.4 Optimization by Numerical Simulation of the Brazed Joint's Mechanical Resistance

    Abstract

    Keywords

    I - Data

    II - Method of Analysis

    III - Brazed Assembly in Plane Stresses: Extremely Thin Joint

    IV - Asymmetrical, Hypothesis, and Data

    V - Brazed Joint Where the Joint is Parallel to the Stresses

    I.5 Mathematical Description of HAZ Behavior of Low-Alloyed Structural Steels

    Abstract

    Keywords

    Introduction

    HAZ-Simulation Studies on Low-Alloyed Steel Type 19MnA16

    HAZ-Description Using Parametric Equations

    Mathematic Modeling of the Microstructural Changes in the HAZ

    Discussion and Conclusions

    References

    I.6 Weld Formation Simulation and Optimization of Stainless Steel Automatic Argon Tungsten Arc Welding Conditions

    Conclusions

    References

    I.7 A Computer Model for Estimating the Risk of Sensitization When Welding Stainless (18/8) Steels

    Abstract

    Keywords

    Introduction

    Heat Transfer during Welding

    Sensitization Damage Parameter

    Computer Solution and Results

    References

    I.8 The Design of Submerged Arc Weld Deposits for High-Strength Steels

    Abstract

    Keywords

    Introduction

    Experimental

    Results and Discussion

    Conclusions

    Acknowledgments

    References

    Session II Inspection and in-Service Monitoring

    II.1 Acoustic Emission Testing (AET) Experience with an Integral Nondestructive Inspection Method for Pressure Vessels

    Abstract

    Keywords

    Introduction

    Inspection System

    Application of Technology

    From TÜV Vienna Performed Tests

    Conclusion

    References

    II.2 Computer Aided Design of Eddy Current Weld Inspection, Optimization of a Multifrequency Approach

    Abstract

    Keywords

    Introduction

    2. Principle of the Eddy Current Method

    3. Eddy Current Procedures

    References

    II.3 Holographic Imaging of Cracks in Welds

    Abstract

    Keywords

    Introduction

    The Concept of Holography: Backpropagation of Scalar Wavefields

    Holographic Imaging with Elastic Waves

    References

    II.4 Robot for Real Time Radiographic Inspection of Circonferential Weld with Computer Processing of the Whole System

    Abstract

    Introduction

    Inconvénients de la Radiographie Conventionnelle

    Contraintes Liees a l'Implantation de la Radioscopie sur Barge de Pose

    Description du Systeme de Controle

    Resultats

    Session III Fabrication, Quality Assurance

    III.1 Development of a Microprocessor-Based System to Determine Resistance-Spot-Weldability and Perform Electrode-Life-Tests Automatically

    Abstract

    Key Words

    Introduction

    Initial Results

    Goals and Future Prospects

    III.2 Friction Welding — Computer-Aided Quality Inspection

    Abstract

    Keywords

    Introduction

    Computer Controlled Friction Welding

    Principles of Computer-Aided Process Monitoring

    Experimentals

    Conclusion

    References

    III.3 Support of Quality Assurance Activities and Weld Inspection by Means of Computer-Aided Data Acquisition and Documentation

    Abstract

    Keywords

    Introduction

    Possibilities of Computer-Aided Data Acquisition (CAQ)

    CAQ in the Organization of Non-Automated NDE Weld Inspection

    CAQ in the Production of Longitudinally Welded Stainless Steel Tubes

    Session IV Expert Systems, Data Banks and Future Possibilities

    IV.1 The Welding Institute Approach to Writing Information Software for Welding Engineers

    Summary

    Keywords

    Introduction

    Software Packages

    Welderqual

    Weldspec

    Weldvol and Weldcost

    Preheat

    Expert Systems

    Expert Systems in Welding

    Future Work

    References

    IV.2 Base de Données Pour le Soudage Adaptatif en MIG Pulsé

    Resume

    Mots Cles

    Introduction

    Conditions Experimentales

    Methodologie de Constitution de la Base de Données

    Les Resultats Experimentaux

    Discussion sur les Resultats

    Conclusion

    References

    Remerciements

    IV.3 Experimental Design System for Solving the Problems of Welding Operational Parameters Optimization

    IV.4 Expert System Improves the Robotic Welding Procedure

    Abstract

    Keywords

    Introduction

    Possible Replacement of Welder's Tasks by Artificial Intelligence

    Description of the Welding Expert System

    The Expert System in the Welding Control Loop

    Future Developments

    Conclusions

    References

    IV.5 Welding Expert System: From the Welsys Experience

    Abstract

    Keywords

    Introduction

    Motivation

    Aims of the Project

    Organization

    First Year Activities

    What We Learned from the First Year Activity

    Second Year Activities

    What We Learned from the Second Year Activities

    What We Suggest from this Experience

    References

    IV.6 Weldex: An Expert System for Designers

    Abstract

    Keywords

    Introduction

    Artificial Intelligence Approach for Welding Technology

    System Architecture and Functional Design of "Weldex" System

    Conclusion

    References

    Posters

    Evaluation of Residual Stress States in Welded Parts — Using Ultrasonic Techniques

    Abstract

    Keywords

    What are the Major Difficulties? - What Has Been Achieved?

    References

    A CAD/CAM Tool for Structural Welding

    Abstract

    Keywords

    Introduction

    Computer-Aided Design System for Estimation of Fatigue Life of Welded Joints under Low-Cycle Loading

    References

    Comparison of Methods for the Description of the Thermal Cycle during Welding

    References

    Microcomputer Control of Resistance Welding Quality

    Abstract

    Keywords

    Introduction

    Vöz-M1 Control System

    References

    Self-Tuning Regulator for the Selected MAG Technology Process

    Abstract

    Keywords

    Foregoing Approach to MAG Process Control

    New Approach to Process Control

    Characteristics of the Selected MAG Technology

    Conclusions

    References

    "Synchronous Welding", an Automatic Technique for MIG Welding

    Abstract

    Keywords

    Introduction

    Principle Characteristics of System

    Implications

    Computer Control of Welding Parameters for Improvement of Weld Quality

    Abstract

    Keywords

    Introduction

    Experimental

    Discussion

    References

    Adaptive Control of MIG/MAG Welding — Feedback System for Weld Penetration Control

    Abstract

    Keywords

    Adaptive Control of Pulse MIG/MAG Welding

    Feedback Control of Weld Penetration (Pan, 1987b)

    Reference

    HPS — A High-Resolution Process-Orientated Seam Tracking System for In-Production Quality Assurance

    Abstract

    Keywords

    Introduction

    The Seam Tracking System "HPS"

    Off-line Mobile Robot for Welding of Horizontal Fillets in Girder Structures

    Automation in the Welding of Large Framed Cylinders

    Abstract

    Keywords

    Introduction

    Seam Tracking

    System Control

    Synchronous Welding

    Summary

    References

    Recent Seam Tracking Equipment Development for Electron Beam Welding

    Abstract

    Keywords

    Introduction

    New Detector Design

    Seam Tracking System

    References

    S.A.O. MIG-MAG: Prise en Compte des Phénomènes de Transfert D'arc

    Resume

    Mots Cles

    Introduction

    Description et Fonctionnement du Systeme

    Exemples d'Application

    Conclusion

    The Development of a Microcomputer-Based Control System of the Machine for Ultra Thin Sheets Welding

    Abstract

    Keywords

    Introduction

    Constitution and Function of the Control System

    Software Design and Debugging

    Elimination of the HF Interference

    Conclusions

    References

    Adjustment of Model of Arc Sensor for Adaptive Welding Robot

    References

    Development of an Automated Process Control for Mechanized Underwater Welding

    Abstract

    Keywords

    Introduction

    Description

    Mode of Operation

    Preliminary Experiments

    Nondestructive Residual Stress and Hardness Evaluation at Weldments by Means of 3MA (Micromagnetic, Multiparameter, Microstructure and Stress Analysis)

    Abstract

    Keywords

    3MA Testing Unit. Theorie of Operation

    What Has Been Achieved? Difficulties

    References

    Alok-an Automated ut-System with Microprocessor Controlled Data Acquisition, Signal Processing and Computer Aided Defect Reconstruction — Applications in Weld Inspection

    Abstract

    Keywords

    Introduction

    Data Acquisition and Compression

    Data Evaluation

    Polyscope: Measuring System Developed for the Characterization of Weld Defects

    Abstract

    Introduction

    Materiel Mis en Oeuvre et Logiciels

    Fonctionnement

    Conclusion

    References

    Quality Monitoring and Control System for Resistance Spot Welding Process

    Abstract

    Keywords

    Instruction

    System Hardware

    System Software

    System Functions

    Experiments for Welding Procedures

    Contrôle de la Qualité en Temps Réel dans la Domaine du Soudage par Résistance

    Resume

    Mots Cles

    Introduction

    1) Causes de "Non Qualite"

    2) Moyens de Maintenir un Niveau de Qualite Acceptable

    3) Principe de Controle de Qualite en Temps Reel

    4) Les Applications en Production

    5) Techniques Auto-Adaptatives, Qualite et Limite

    Ultrasonic Weld Inspection with Synthetic Aperture Focusing Techniques (SAFT)

    Abstract

    Keywords

    Introduction

    Test Facilities

    Experiments

    Expert System Welda: A Welding Design Advisor for Trial Manufacture

    Abstract

    Keywords

    Outline of the System

    Rules and Control

    Knowledge-Based Systems for Flaw Assessment

    Abstract

    Keywords

    Introduction

    A Text Animator for the New PD 6493

    Charpy/Fracture Toughness Correlations for Ferritic Steels

    Discussion

    Investigation of Potential Application of Television in Microprocessor Systems for Consumable-Electrode Arc Welding Control

    Conclusions

    A New Type of TIG Welding Power Source with Artificial Intelligence

    Abstract

    Study on Real Time Quality Control of Resistance Spot Welding

    Author Index

    Subject Index


Product details

  • No. of pages: 316
  • Language: English
  • Copyright: © Pergamon 1988
  • Published: January 1, 1988
  • Imprint: Pergamon
  • eBook ISBN: 9781483146843

About the Author

Unknown Author

Dr. Sam Stuart is a physiotherapist and a research Fellow within the Balance Disorders Laboratory, OHSU. His work focuses on vision, cognition and gait in neurological disorders, examining how technology-based interventions influence these factors. He has published extensively in world leading clinical and engineering journals focusing on a broad range of activities such as real-world data analytics, algorithm development for wearable technology and provided expert opinion on technology for concussion assessment for robust player management. He is currently a guest editor for special issues (sports medicine and transcranial direct current stimulation for motor rehabilitation) within Physiological Measurement and Journal of NeuroEngineering and Rehabilitation, respectively.

Affiliations and Expertise

Senior Research Fellow, Department of Sport, Exercise and Rehabilitation, Northumbria University, UK Honorary Physiotherapist, Northumbria Healthcare NHS Foundation Trust, North Shields, UK

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