B1970 - Foundations of Technical Drawing for Composite Materials P

Learning outcomes

The student is familiar with the fundamentals for understanding and using computer-aided technical drawing tools. They are capable of applying the acquired knowledge in the individual execution and interpretation of technical drawings for industrial components and assemblies, particularly in the context of designating composite material artifacts.

Course contents

Introduction

 The purpose of this course is to provide the necessary knowledge for the interpretation and execution of technical drawings. After an initial section dedicated to geometric drawing, the main standards to be used for the correct representation of details and assembly drawings (overall) are examined. Particular emphasis is given to the function performed by each detail in the overall and the influence of the production system for a correct choice of shapes and accurate indication of additional information to include (dimensions, dimension and geometric errors considered acceptable, etc.).

Main topics

 

Conventional tools in drawing, standard line types and unified hatching. Selection of formats and scales. Fundamental Geometric Constructions: constructing parallel lines, perpendicular lines, segment axes, bisectors, etc. Methods for connecting lines, arcs, and tangent lines. Graphical construction of cubics curves.  Orthogonal Projection Method: First and Third Angle Projection. Sectional Views of Solids. Oblique and Orthogonal Axonometric Projections (Brief Overview). Standards and Conventions in Technical Drawing. Views and sections from a regulatory perspective. General dimensioning criteria. Types of drawings within the design cycle: assembly drawings and detail drawings. Functional dimensioning. Influence of production methods on part drawings and dimensioning. Manufacturing and inspection dimensioning. Tolerated chain of dimensions. Limitation of Dimensional and Geometric Errors. Dimensional Tolerances. Introduction to Microgeometric and Macrogeometric Errors. Definition and Indication of Surface Roughness. Connections. Threads. Shaft-Hub Connections (keys, keyways, splines, snap rings, etc.). Fastening methods: riveting, welding, adhesive bonding. Rotary Motion Guides (rolling and sliding bearings). Lubrication Systems. Sealing Elements (static and dynamic). Drawing for Composite Material Components. 

Readings/Bibliography

Manfè, Pozza, Scarato, Disegno meccanico, vol. 1, 2, 3, ed. Principato, Milano. 

Chirone, Tornincasa, Disegno Tecnico Industriale, ed. Il Capitello, Torino.

Teaching methods

The course consists of:

• Theoretical classroom lessons, during which real mechanical components and assemblies are brought into the classroom and explained for examination and drawing;
• Practical exercises in which the teacher guide students through assigned drawings, and each student completes them

Assessment methods

The final exam consists of an written text, and afterwards, an oral exam.

a) The written test (drawing) involves creating a 2D drawing of a mechanical component, following technical drawing standards (during this phase, students can consult textbooks, notes, tables, and manuals; however, internet access is prohibited). Candidates can choose to complete the test using tools or freehand drawing. Students have 1 hour and 30 minutes for this part of the exam. Candidates must bring A4 and A3-sized sheets, as done throughout the year (the specific format depends on the assigned component).

Admission to the oral exam is contingent on passing the written test; candidates must achieve a minimum score of 18/30.

b) The oral exam consists of questions related to the topics outlined during the course (the exact number of questions depends on how the student performed in the written test and the assignments completed during the year). Sketches, either with tools or freehand, are also part of the oral exam. The day od the exam, candidates must bring the drawings completed during the year. The overall exam grade includes evaluations of both oral responses and the written test, as well as the assignments completed during the exercises.

Teaching tools

Lecture slides, assignments throughout the year, and additional information can be found on the Virtuale.unibo.it website.

Office hours

See the website of Antonio Bacciaglia

See the website of Luca Piancastelli

See the website of Roberto Valmori