RECONSTRUCTION AND OPTIMIZATION OF COMPLEX GEOMETRIC PARTS THROUGH REVERSE ENGINEERING

Abstract

This paper presents a case study on the repair of oldtimer parts, with a particular focus on the damaged air duct that connects the heating and cooling system to the car's cabin. The replacement of such parts is challenging due to the cessation of production, making reverse engineering a feasible solution. Using the high-resolution and high-accuracy Artec SPIDER 3D scanner, the damaged part was digitized, followed by shape reconstruction and 3D CAD modeling processes. Furthermore, the model was modified to meet modern requirements and improve its functionality. The specification and modeling of freeform features were investigated, employing constraint-based parameterization methods and prototype-driven constraint solving. These approaches enable intuitive parameterization and precise reconstruction of complex geometric shapes. The results demonstrate that the application of modern reverse engineering technologies, along with necessary modifications, can effectively address the challenges of oldtimer restoration, ensuring the preservation of the original parts' functionality and aesthetics, thereby contributing to the maintenance of cultural heritage and the technical value of these cars.