How to control weld penetration and bead.

The Physics of Weld Bead Defects

Defect detection of the weld bead based on electromagnetic sensing

Characterization of flaws of weld bead is imperative for high-quality welding. Methods of weld bead inspection include radiographic, ultrasonic and vision inspection. However, such methods are costly and time consuming. The proposed sensor is light, low-cost and fast. This paper summarizes our work on weld bead monitoring and defect detection using an electromagnetic sensor. Measurements are ac...

Vision-based neuro-fuzzy control of weld penetration in gas tungsten arc welding of thin sheets

This paper develops a vision-based neuro-fuzzy system to control the weld joint penetration in Gas Tungsten Arc Welding (GTAW) of thin sheets. To this end, a camera equipped with a specially designed composite light-filter is used to observe the weld pool from the topside of the workpiece so that comparatively distinct images of the weld pool are obtained. As the Backside weld Width (BW) reflec...

Double-sided Arc Welding Increases Weld Joint Penetration

Welding time and joint preparation are among the most important factors dominating the cost and productivity of welding. If the desired penetration of the weld pool can be achieved in a single pass, the welding speed will be the major factor that determines the welding time. When the thickness of the part increases, grooves may have to be machined so that the desired penetration may still be ob...

Edge Weld Penetration Assessment via Electric Current Deflection Measurements

Because of the awkward and somewhat irregular shape of the weidment, conventional methods [I] could not be adapted to the nondestructive measurement of GT A W edge weid penetration on clamshell-style catalytic converters and a special inspection system based on the eiectric current deflection method was developed. DC or low-frequency AC electric resistance measurements, also known as the Potent...