IMPROVING THE QUALITY OF FRICTION WELDING BY SELECTED METHODS

Abstract

The study is aimed to identify the causes of piston incompatibilities in the friction welding area, as well as to reduce or eliminate the occurrence of non-compliance using quality management tools (Pareto-Lorenz diagram, 5W2H and 5Why method). Diagnostic tests were carried out with visual tests and quality control results were analyzed. The subject of the research was a steel piston for diesel trucks. The studies identified the most serious non-compliance - burnout of the combustion chamber and clarified its cause - the incorrect execution of the upper fork in the area of the combustion chamber due to the lack of supervision of workers. So far, the company has not analyzed quality problems using a sequential quality management methodology, so that the corrective actions implemented have not fully achieved the quality objectives. The sequential method used in the development, including diagnostic and control tests and quality management tools, is a universal way to monitor the quality level of products and quickly correct non-conformities. There are no implications for this methodology. It can be implemented in companies producing products that ensure an adequate level of quality.