Abstract
The paper presents the specification of a device for automatic feeding of coated electrodes into a weld pool and the results of its application. It eliminates subjective assessment methods and professional skills of welders, which contributes to a more stable metal transfer into the weld pool. The research results have shown that automatic feeding of coated electrodes into a weld pool enables to reasonably assess their welding and technological properties. Any devices similar to the developed one and the results of their tests have not been found.
Highlights
Shielded metal arc welding (SMAW) is the most versatile way to obtain permanent joints of metal structures for various applications [1]
In order to obtain objective, reliable and repeatable results of conducted investigations in the field of SMAW, it is necessary to reduce the influence of the human factor as much as possible
The electrode is supported mechanically and lowered into the weld pool under the action of gravity without human participation (Figure 1). Disadvantages of this method include the impossibility of controlling the required arc length, as well as constant changes in both the electrode inclination angle and the weld pool coordinates on the horizontal plane
Summary
Shielded metal arc welding (SMAW) is the most versatile way to obtain permanent joints of metal structures for various applications [1]. In order to obtain objective, reliable and repeatable results of conducted investigations in the field of SMAW, it is necessary to reduce the influence of the human factor as much as possible. This is especially true for testing equipment and consumables used for SMAW, where this effect is decisive [3, 5]. In the 1930s, a welding method with an inclined coated electrode has been invented in the USSR [7] In this case, the electrode is supported mechanically and lowered into the weld pool under the action of gravity without human participation (Figure 1).
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