Analysis of the influence of the systemic welding coordination on the quality level of joints

Abstract

The need for welding coordination is due to the significant risks of non-compliance with the requirements for welded joints. It is known that the request of coordination standards in welding streamlines the work of ensuring the quality of welding, it is positively perceived by customers and other stakeholders. However, the effect of systemic welding coordination on objective indicators of the quality of welded joints during production requires detailed studying. The comparative statistical analysis of the effect of systemic welding coordination on the level of welded joints' quality was preceded by the process-oriented development and implementation of a set of procedures for the coordination of welding operations in the production of welded frames. A scheme of interaction and the classification of coordination procedures in welding have been proposed. The procedures were divided into three groups. The first group includes long-term welding quality procedures. The second group is the procedures for ensuring the quality of welding in the execution of a Request (Order, Contract). The third group consists of procedures to ensure and improve the quality of welding a joint. The implementation of regulatoryorien ted content of the procedures ensures the admission of personnel with necessary qualifications, the application of appropriate welding equipment, materials, technical documentation, thermal treatment, technical control. All this together ensures that the requirements for the welded joint, the specified thickness of the main metal, the type of a joint and seam, are met. Data on the quality of welded frames during production were obtained prior to and after the introduction of the international standards of welding coordination. Using the Shewhart charts has shown that ensuring quality by the welding coordination could stabilize the welding process, translating it into a statically manageable state while doubling the proportion of nonconforming units in the sample

Study of Possibilities of Joint Application of Pareto Analysis and Risk Analysis During Corrective Actions

“…The research was carried out according to the data obtained in the welding industry. Welding coordination standards require taking into account all defects and taking corrective actions [9]. Using the Pareto chart, the priority areas for improving the welding process in the production of welded seeder frames are identified by the number of defects detected during the month.…”