The reverse engineering and rapid prototyping, walking hand-in-hand exactly fulfill the task for which are suitable -- to help quickly construct and reconstruct the damaged components. Our goal is to find areas where the technologies are not yet widely available, or find the technologies that can be used for industrial purposes and for the everyday practice. [ABSTRACT FROM AUTHOR]
Recently point set model is getting increasing research attention in many geometric modeling application areas including computer graphics and CAD/CAM. This paper presents a novel approach to directly slicing point set model with the focus on making rapid prototyping part out of point set model without making any mesh or surface. Main challenge in handling point set model lies in how to interpret inter-point empty space and implicit quadric surfel is used in this research. This paper also explains how to utilize the quadric surfel for slicing the point set, so as to obtain contour curves for RP. Also described in this paper is how to extract smooth curve(s) out of the 2D point cloud obtained by slicing the 3D point set model. [ABSTRACT FROM AUTHOR]
This article focuses on methodologies of discrete patches filling in reverse engineering and rapid prototyping. In the process of part or product design, reverse engineering is an important method for constructing computer aided-design (CAD) models from a physical part that already exists. In industrial applications, a user may need to reconstruct CAD models for parts where data point capture is incomplete, such as where digitized points are captured from a damaged physical part or from certain geometric features that are difficult for a coordinate measuring machine to characterize. The sets of data points consist of some regions without data.
Purpose - Aims to investigate medical rapid prototyping (medical RP) technology applications and methods based on reverse engineering (RE) and medical imaging data. Design/methodology/approach - Medical image processing and RE are applied to construct three-dimensional models of anatomical structures, from which custom-made (personalized) medical applications are developed. Findings - The investigated methods were successfully used for design and manufacturing of biomodels, surgical aid tools, implants, medical devices and surgical training models. More than 40 medical RP applications were implemented in Europe and Asia since 1999. Research limitations/implications - Medical RP is a multi-discipline area. It involves in many human resources and requires high skills and know-how in both engineering and medicine. In addition, medical RP applications are expensive, especially for low-income countries. These practically limit its benefits and applications in hospitals. Practical implications - In order to transfer medical RP into hospitals successfully, a good link and close collaboration between medical and engineering sites should be established. Moreover, new medical applications should be developed in the way that does not change the traditional approaches that medical doctors (MD) were trained, but provides solutions to improve the diagnosis and treatment quality. Originality/value - The presented state-of-the-art medical RP is applied for diagnosis and treatment in the following medical areas: cranio-maxillofacial and dental surgery, neurosurgery, orthopedics, orthosis and tissue engineering. The paper is useful for MD (radiologists and surgeons), biomedical and RP/CAD/CAM engineers. [ABSTRACT FROM AUTHOR]
International Journal of Computer Integrated Manufacturing. Mar1999, Vol. 12 Issue 2, p97-103. 7p. 4 Black and White Photographs, 9 Diagrams.
Prototypes and Reverse engineering
In reverse engineering, a digitizer usually generates a large cloud of 3D points data, many of which are not necessary for subsequent applications. When a digitized part is to be manufactured by means of rapid prototyping machines, e.g. stereolithography apparatus (SLA) and selective laser sintering equipment (SLS), etc. there is no need to construct the CAD model of the digitized part. This will be described by the proposed novel method which can construct an STL file (the de facto file format for rapid prototyping machines) directly from digitized part data. In order to reduce storage space and increase computational efficiency for subsequent processes, e.g. slicing, data reduction is achieved based on two criteria: one is the desired percentage data reduction; the other is the maximum bounded error. [ABSTRACT FROM AUTHOR]