Planning and design of industrial components (Module 1)
LEARNING OUTCOMES OF THE COURSE UNIT
Knowledge and understanding: Capacity to precisely interpret technical drawings, including symbols relating to mechanical machining operations. Knowledge of the main types of connections and transmissions.
Expertise: Ability to draft, freehand or with the use of set squares, technical drawings of mechanical components based on elevations or isometric drawings. Ability to assign tolerances and surface finish requirements based on the necessary component functionality.
Independent interpretation: Development of an adequate autonomy in the analysis of mechanical systems so as to correctly represent their individual components.
Communication skills: Further to production of correct and complete graphical representations necessary for conveying the form of simple mechanical components, students will acquire specific vocabulary inherent to mechanical drawing through frontal lessons and provided teaching material.
Interpretation capacity: Ability to interpret technical drawings and extract complex solid three-dimensional forms from them. Capacity to apply related knowledge where necessary (e.g. relationship between component functionality, design and production method).
COURSE CONTENTS SUMMARY
This course provides students with the fundamentals of industrial technical drawing. The first part of the course covers the bases of mechanical drawing, orthogonal projections of simple and complex bodies, sections and isometric projections. Subsequently, more specific topics will be covered including interpretation and arrangement of geometric dimensioning, surface finish and dimensional and geometric tolerances required for component functionality. In the final part of the course, the main types of permanent and releasable connections will be covered with particular attention to threaded connections, welded joints and mechanical transmissions. Practical exercises will be given during lessons throughout the entire course, covering all of the treated topics.
Slides used throughout the course will be available to students in PDF format via the Elly online platform, together with all teaching material and practical exercises covered during lessons. To download this material, students must log on to Elly and register for PROGETTAZIONE E DISEGNO DI COMPONENTI INDUSTRIALI (1° MODULO).
Further to material provided within the course, students can expand upon covered topics by studying from the following texts (in Italian):
1. Manfè, Pozza, Scarato. Disegno meccanico. (3 volumi), Principato.
2. Caligaris, Fava, Tomasello, "Dal progetto al prodotto", (3 volumi), Paravia
ASSESSMENT METHODS AND CRITERIA
Exams will be held jointly with “module II” of the same course.
The written exam will comprise the following:
- Task 1: preparation of a technical drawing of two components based on a small assembly drawing. Further to simple graphical representation with orthogonal projections, it is necessary to indicate dimensions, surface finish and tolerances necessary for complete component functionality.
- Task 2: exercise based on a mechanical design problem where verification of structural integrity is required, together with calculation of the safety factor.
- Task 3: response to a question relating to part of the theory covered during the course (both modules I and II).
Written exams are assigned grades from 0 to 30, with the three tasks weighted 0.46, 0.36 and 0.18, respectively (tasks 1, 2 and 3).
Written exam results are published on esse3, usually within 2/3 days of the exam date. All students that do not achieve a pass grade can view their marked exam through appointment with the course coordinator.
Where a grade equal or greater than 18/30 is achieved, the exam is considered passed and the grade can be directly confirmed and reported.
Where a grade equal or greater than 16/30 is achieved, it is possible to undertake an oral exam with the possibility of increasing or decreasing the grade achieved in the written exam.
The written exam only gives access to the oral exam immediately following. The oral exam can only be undertaken within the date indicated on esse3 and cannot be postponed to a later date.
Teaching activities will be conducted in the form of frontal lessons followed by tutorials. Themes covered in the course will be presented during lessons together with explanations of mechanical components and their representations. Refinement of the presented topics will be provided during subsequent tutorials, where students will resolve practical exercises. Where there is insufficient time for completion of exercises within the allocated tutorials, students will be required to complete them a home.
The course program is as follows:
1. Introduction to technical drawing
2. Orthogonal and isometric projections
5. Dimensional tolerances
6. Surface Roughness and geometric tolerances
7. Fastened Connections
8. Mechanical Transmissions
9. Welded Joints