In the present study, Gas metal arc welding (GMAW) based Wire-arc additive manufacturing (WAAM) process was used to fabricate a multi-layered structure at optimized parameters on SS316L using wire of SS316L. The structure's microstructure, macrostructure, and mechanical properties (tensile test, impact microhardness, fractography) were examined three locations top, middle, bottom sides structur...

On-l ine quality control in automated welding operations is an important factor contributing to higher productivity, lower costs and greater reliability of the welded components. However, the development of on-l ine inspection techniques and feedback control is still in its infancy. Sound signature produced by GMAW contains information about the behavior of the arc column, the molten metal and ...

This paper presents a novel approach to welding thick steel plates that offers time and energy savings compared with conventional techniques. The combination of gas metal arc (GMAW) hot-wire technology simplifies the joint configuration enhances process tolerance. In this study, square butt was prepared as-cut edges thickness 15 mm. relationship between current deposition rate solo GMAW showed ...

The process of Wire Arc Additive Manufacturing (WAAM) utilizes arc welding technology to fabricate metallic components by depositing material in a selective layered fashion. Several processes exist that can achieve this deposition strategy. Gas Metal Welding (GMAW) derived are commonly favored for their high rates (1–4 kg/h) and minimal torch reorientation required during deposition. A range GM...

Abstract Take the wear parts of coupler knuckle as an example, “Modeling—Slicing — Stacking” mode remanufacturing process is studied. First, 3D model worn surface acquired by structured light detection. The failure part built Boolean operation between original and model. Second, user can slice layer according to stacking parameters. zone that surrounded contour each sliced robotic GMAW stack re...

This paper presents a new method for measuring and classifying spatter in gas metal arc welding (GMAW) by optical monitoring of the weld pool and surrounding area via a high-frame-rate camera. Image processing and tracking algorithms are described that extract and classify individual spatter events from raw camera images. This new sensor is then used to investigate the relationship between work...

This paper addresses the problem of fault-tolerant robust supervisory control of discrete event systems (DES’s) with model uncertainty. Necessary and sufficient conditions for the existence of a fault-tolerant robust supervisor are derived. If the conditions are satisfied, then tolerable fault event sequences embedded in the system can be achieved. The results obtained are applied to design, mo...

The conjoint influence of welding and artificial aging on mechanical properties were investigated for extrusions of aluminum alloy 6063, 6061, and 6005A. Uniaxial tensile tests were conducted on the aluminum alloys 6063-T4, 6061-T4, and 6005A-T1 in both the as-received (AR) and as-welded (AW) conditions. Tensile tests were also conducted on the AR and AW alloys, subsequent to artificial aging. ...

Rapid prototyping (RP) methods are used for production easily and quickly of a scale model of a physical part or assembly. Gas metal arc welding (GMAW) is a widespread process used for rapid prototyping of metallic parts. In this process, in order to obtain a desired welding geometry, it is very important to predict the weld bead geometry based on the input process parameters, which are voltage...