Real-Time Weld Process Monitoring

Name: Real-Time Weld Process Monitoring
Availability: OutOfStock
ISBN: 9781420077872

ISBN-10: 1420077872

ISBN-13: 9781420077872

Edition: 2008

Authors: Y. M. Zhang

List price: $249.95

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Description:

Welding is a complex process, is increasingly automated, and operates at higher speeds in more difficult environments. Defects also need to be detected as they arise to ensure efficient, high-quality production. All these needs have led to a growing interest in the use of sensors to provide accurate, robust, real-time monitoring where this cannot be achieved by more traditional testing and inspection techniques. This important book reviews the range of monitoring techniques available and their applications. After an introductory chapter, the first part of the book reviews the range of sensor technologies in welding, from arc and optical sensors to infrared and ultrasonic techniques. Part…

Book details

List price: $249.95
Copyright year: 2008
Publisher: CRC Press LLC
Publication date: 4/16/2008
Binding: Hardcover
Pages: 312
Size: 6.25" wide x 9.25" long x 0.75" tall
Weight: 1.298
Language: English

Contributor contact details	p. ix
An analysis of welding process monitoring and control	p. 1
Introduction	p. 1
Welding process as a system	p. 1
Welding process as a complex system	p. 4
Welding process as an uncertain system	p. 6
Monitoring of welding processes	p. 7
Overview of the book	p. 10
References	p. 11
Monitoring technologies	p. 13
Arc sensors in weld monitoring	p. 15
Introduction	p. 15
Background	p. 15
Non-consumable electrode processes	p. 20
Consumable electrode processes	p. 25
Power supply considerations	p. 31
Signal processing and control approaches	p. 36
Future trends	p. 39
Sources of further information and advice	p. 41
List of symbols and abbreviations	p. 41
References	p. 43
Optical sensors in welding	p. 45
Introduction	p. 45
Knowledge of optics	p. 46
Optical sensor component	p. 52
Optical sensing system	p. 62
Application of optical sensors	p. 69
References	p. 72
Infrared sensors in welding	p. 74
Introduction	p. 74
Theory of infrared sensors	p. 74
Measurement of weld temperature distribution	p. 80
Infrared sensors for real-time weld quality control	p. 82
Summary	p. 99
References	p. 99
Ultrasonic sensors in welding	p. 104
Introduction	p. 104
Principles of ultrasonic sensing	p. 105
Ultrasonic techniques and their applications	p. 110
Future trends	p. 122
Summary	p. 123
Sources of further information and advice	p. 124
References	p. 124
Monitoring of welding processes	p. 129
Weld seam monitoring	p. 131
Introduction	p. 131
Methods of weld seam monitoring	p. 131
Through-arc monitoring of weld seams in gas metal arc welding	p. 132
Electromagnetic monitoring of weld seams in gas metal arc welding	p. 150
Laser visual monitoring of weld seams in gas metal arc welding	p. 152
References	p. 162
Weld profile monitoring	p. 164
Necessity for weld profile measurement	p. 164
Outline of weld profile	p. 165
Surface shaping defects	p. 170
Automatic detection of weld profile	p. 172
References	p. 184
Weld penetration monitoring	p. 186
Introduction	p. 186
Weld pool oscillation sensor	p. 187
Infrared sensor	p. 191
Ultrasonic sensor	p. 193
Vision-based sensor	p. 195
Weld pool sag depression	p. 196
Plasma charge-based sensors	p. 199
Weld penetration control using sensor feedback	p. 205
Summary	p. 209
References	p. 211
Weld pool surface monitoring	p. 213
Vision-based sensing 2D surface geometry of weld pool in gas tungsten arc welding	p. 213
Sensing 2D weld pool boundary in gas metal arc welding	p. 217
Modeling and simulation of weld pool surface	p. 220
Sensing 3D weld pool surface using specular reflection	p. 229
Improvement on observation of dynamic 3D weld pool surface	p. 232
References	p. 236
Monitoring resistance welding	p. 238
Introduction	p. 238
Resistance spot welding systems, weld formation and signals	p. 239
Real-time process monitoring and control	p. 245
Future trends	p. 255
Sources of further information and advice	p. 258
Acknowledgment	p. 258
References	p. 258
Monitoring laser welding	p. 260
Introduction	p. 260
Principles of laser welding	p. 260
Optical sensing	p. 263
Frequency analyses of acoustic and optical emissions	p. 274
Smart systems	p. 278
Other systems and future trends	p. 280
References	p. 284
Index	p. 289
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