Arc welding

About: Arc welding is a research topic. Over the lifetime, 25393 publications have been published within this topic receiving 168182 citations.

A self-consistent three-dimensional model of the arc, electrode and weld pool in gas–metal arc welding

Abstract: The development of a three-dimensional computational model of gas–metal arc welding is described. The wire electrode, arc plasma and weld pool are included in the computational domain self-consistently. The model takes into account the motion of the electrode, flow in the weld pool, deformation of the weld-pool surface and the influence of metal droplet transfer. Results are presented for welding of an aluminium alloy. The current density distribution at the interface between the arc and the weld pool is strongly dependent on the surface profile of the weld pool. This in turn affects the temperature distribution in the weld pool. The momentum transferred by the droplet affects the direction of flow in the weld pool, and together with the energy transfer, increases the weld-pool depth. The results demonstrate the importance of including the arc plasma in the computational domain. Fair agreement is found between a measured weld profile and the predictions of the model. Inclusion of the influence of metal vapour in the model is expected to improve the agreement.

Arc welding monitoring device

Abstract: An arc welding monitoring device which can easily recognize the correspondence between the operating path of a robot, namely, the weld line information of a work to be welded and detected data such as welding voltages and currents. The monitoring device is provided with means (4 and 5) which detect at least either welding currents or welding voltages, a means (14) which retains the detected data of the means (4 and 5), a means (14) which stores the operating path of the robot, and a means (12) which displays at least either the welding currents or welding voltages detected by means of the detecting means (4 and 5) and the operating path of the robot stored by means of the storing means (14) on a display, sets an extent on the operating path displayed on the display, and makes arc welding monitoring displays within the set extent.

Welding of Aluminum Alloys to Steels: An Overview

Abstract: Since the need for the joining of dissimilar mate- rials is increasing, the wide range of requirements of the numerous industries would lead to the development of new welding techniques or at least to improvement of the existing technologies capable of joining the components from the miniature assemblies to extremely large earth- moving vehicles. Among the different materials, iron- based alloys and aluminum-based alloys are the most significant materials that are finding applications in the various industries to offer more viable and sustainable products. However, welding of these metals has been always a kind of dilemma for the engineers. There are a certain number of methods to join these dissimilar metals but no one could establish a reliable or a sort of credible welding method for the industrial applications while quality, cost, human resources and facilities are taken into the main considerations. This paper reviews the recent works on the joining of different aluminum alloys to dif- ferent steels. The effect of the joining conditions on the formation of intermetallics and microstructural develop- ment, mechanical properties and applications of the joints are discussed.

Weld pool development during GTA and laser beam welding of Type 304 stainless steel; Part I - theoretical analysis

Abstract: A computational and experimental study was carried out to quantitatively understand the influence of the heat flow and the fluid flow in the transient development of the weld pool during gas tungsten arc (GTA) and laser beam welding of Type 304 stainless steel. Stationary gas tungsten arc and laser beam welds were made on two heats of Type 304 austenitic stainless steels containing 90 ppm sulfur and 240 ppm sulfur. A transient heat transfer model was utilized to simulate the heat flow and fluid flow in the weld pool. In this paper, the results of the heat flow and fluid flow analysis are presented.