Development of the milling technique of thin-walled integral elements made of aviation light metal alloys in the context of minimalisation post-machining deformations

Project title: Development of the milling technique of thin-walled integral elements made of aviation light metal alloys in the context of minimalisation post-machining deformations

Agreement number: LIDER14/0153/2023

Edition of the competition: XIV

Project implementation period: 01.04.2024 - 01.04.2027

Project value: 1 543 750,00 PLN

Funds granted for Lublin University of Technology: 1 543 750,00 PLN

Principal Investigator: dr inż. Magdalena Zawada - Michałowska

Abstract: The aim of the project, which is carried out in the discipline of mechanical engineering, is to develop the milling technique of thin-walled integral elements made of aviation light metal alloys in the context of minimisation postmachining deformations. The justification of the topic choice is the problem, especially in the aviation industry, related to the appearance of undesirable deformations of thin-walled elements after machining and removal of the forces fixing the workpiece in the machining jig. They often make further assembly difficult or even impossible, and also cause numerous production shortages. The main causes of the aforementioned post-machining deformations are the residual stresses generated at each stage of the technological process. In industry, heat treatment (stress relief annealing) and seasoning are mainly used for their relaxation. However, they are long-term and costly operations, therefore efforts are made to eliminate them. As part of the project, the milling technique will be prepared that will allow minimising the post-machining deformations as a result of the proper constitution of residual stresses during machining. Thanks to the removal of heat treatment and seasoning from the technological process of thin-walled elements, it will be possible to shorten the processing time and reduce costs. The results of the research will be implemented in one of the most dynamically developing companies dealing with machining of thin-walled elements for aviation in eastern Poland (SZEL-TECH Grzegorz Szeliga).