3D scanning processes by contact and non-contact digitizers (theory and practical applications).
Processing of 3D scanned data e 3D modelling from scanned data.
3D model preparation for 3D printing.
3D printing processes by means of FDM and SLS technologies (theory and practical applications).
No reference books are available for the subjects of the course.
Support material consists of a set of slides used by the teacher during the lessons. Students will be provided with such material by means of the moodle platform.
Learning Objectives
The aim of the course is to provide the students with practical knowledge to: manage and operate 3D scanners, reconstruct 3D CAD models from scanned data, manage and operate 3D printers. Particular attention will be devoted to the application of these skills to product re-enginering, dimensional control, optimal choice of 3D printing parameters.
CA3: Applying knowledge and understanding related to the choice and application of appropriate analytical and modelling methods, based on mathematical and numerical analysis, in order to better simulate the behavior of components and plants in order to predict and improve their performance.
CA4: Applying knowledge and understanding related to the implementation of engineering projects adapted to their level of knowledge and understanding, working in collaboration with engineers and non-engineers. The projects may concern components, equipment and mechanical systems of various kinds and for the widest possible applications.
CA6: Applying knowledge and understanding related to the identification, location and retrieval of data and information necessary for the assessment.
CA12: Applying adequate knowledge and understanding to understand English texts.
CC3: Knowledge, understanding and use of scientific (computer and other) tools specific to the field of mechanical engineering design.
CC4: Knowledge and understanding of numerical methods for the design and verification of mechanical components and/or systems, including numerical models for the correct representation of material behaviour. Knowledge of analysis types necessary to carry out the aforesaid design and verification activity according to the most recent requirements of the industrial world.
Prerequisites
none
Teaching Methods
In the first part of the course students will be briefly introduced to theoretical background of 3D scanning techniques and equipment. Afterwards, students will have to practice with hardware and software equipment for 3D scanning and CAD reconstruction by using laboratory equipment.
In the second part of the course students will be briefly introduced to theoretical background of 3D printing techniques and equipment. Afterwards, students will have to practice with hardware and software equipment for 3D model preparation and 3D printing by using laboratory equipment.
In the third part of the course students will choose a practical case study and will be followed by the teacher while they apply to it their skills and laboratory equipment.
Further information
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Type of Assessment
The exam includes the execution of a practical test consisting in the development of a project developed in the department's laboratories; an oral test aimed at discussing the methods of development and the results of the project and the notions imparted by the teacher during the course of frontal teaching. In particular, the test consists of at least one question on the choices (parameters, settings, procedures) made to scan the object of the practical test, to reconstruct the design intent of the designer justifying any changes to the scan obtained; at least one question on the choice of machine parameters for 3D printing of the CAD model obtained.The student will have to demonstrate a good ability to use 3D scanning tools, a good knowledge of reconstruction tools starting from point clouds or 3D mesh , a sufficient knowledge of management of hardware and software tools for 3D printing (ca4, ca6, ca12, cc3, cc4).
Course program
1. Explanation and practical laboratory demonstration of the 3D scanners based on laser-camera triangulation
2. Explanation and practical laboratory demonstration of the 3D scanners based on articulated arm (contact and non-contact versions)
3. Explanation and practical laboratory demonstration of software for the preprocessing of 3D scanned data and for the generation of polygonal models.
4. Explanation and practical laboratory demonstration of software for the reconstruction of 3D CAD models from scanned data by means of both surface modelling and feature-based parametric modelling.
5. Explanation and practical laboratory demonstration of software for dimensional analysis from scanned data.
6. Explanation and practical laboratory demonstration of software for the preparation of 3D digital models to 3D printing.
7. Explanation and practical laboratory demonstration of 3D printers based on FDM and SLS technologies
8. Project work consisting of 3D scanning, 3D modeling, 3D printing and verification of an object or simple machine selected as a case study.