Difference of improving welder's skill through training progression

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Welding training has some disadvantages such as long time required and need for a considerable quantity of training material; in addition, it is dangerous for beginners. To overcome these limitations, effective training methods are being explored. These researches target one of many welding methods. However, it is necessary to consider series training of several welding methods because almost all welders are required to acquire multiple welding skills. This paper describes the influence of different training processes for SMAW (shielded metal arc welding) and TIG (tungsten inert gas welding) on welding skill improvement. A training experiment was conducted with 6 testees, who were students of the mechanical engineering department, and had never done welding before. The testees were divided into two groups-group A with 3 testees, and group B with 3 testees-and were trained for SMAW and TIG over four days. The testees in Group A were trained for SMAW during the first and second day, whereas the testees of Group B were trained for TIG during the same time. On the third and fourth day-the testees of Group A were trained for TIG, whereas those in Group B were trained for SMAW. Each day after training, tip movement and welding bead shape were measured for skill evaluation. It was observed that welding time and welding bead shape on SMAW and TIG had improved after training for two days; however, the electrode tip movement showed no improvement. Further, it was observed that skill improvement is influenced by welding method training.

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