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...

The first papers on the activating flux application appeared already in 1950’s and 1960’s, but the interest for this welding process has been activated again in the last ten years 1, 2 . In order to increase the efficiency and productivity of TIG process, a variant of process with the activating flux is applied (ATIG). With the presence of the activating flux and high temperature, the value of ...

Fillet welds of highly reflective materials are common in industrial production. It is a great challenge to accurately locate the fillet materials. Therefore, this paper proposes weld identification and location method that can overcome negative effects high reflectivity. The proposed based on improving semantic segmentation performance DeeplabV3+ network for structural light noise, and, with M...

Friction stir welding and tungsten inert gas welding techniques were employed to weld armor grade aluminum alloy to investigate the effect of welding processes on tensile behavior of weld joints. Tensile tests, Vicker microhardness tests and optical microscopy were performed on developed weld joints and base metal. Welding process influenced tensile behavior and microstructure of weld joints. F...

In this paper, a multi-scale coupling mathematical model is suggested for simulating the polymer filling process in weld line region on micro scale. The considers two aspects: one based stresses whole cavity region; other of continuum mechanics (CM) and molecular dynamics (MD) weldline region. A weak variational formulation constructed finite element method (FEM), which coupled with Verlet algo...

When evaluating the safety of steel structures, welding residual stress is used as secondary load and if there any restraint, yield base material for load, regardless size restraint. Of late, members increasing with increase in use high-strength steels, proportion total during evaluation structures increasing. Therefore, it necessary to investigate effect restraint on stress, determine reasonab...

A skilled welder determines the weld joint penetration from his/her observation of the weld pool surface during the welding process. This paper addresses the characterization of the 3D weld pool surface in gas tungsten arc welding (GTAW), i.e., extracting a set of characteristic parameters from the 3D weld pool surface to determine the backside bead width that measures the degree of weld joint ...

Sharma, Saurabh Weld for Itanium Processor (Under the direction of Dr. Thomas M. Conte) This dissertation extends a WELD for Itanium processors. Emre Özer presented WELD architecture in his Ph.D. thesis. WELD integrates multithreading support into an Itanium processor to hide run-time latency effects that cannot be determined by the compiler. Also, it proposes a hardware technique called operat...