Training Engineers in the Use of Constraints to Create Quality 2D Pro les for 3D Models

Abstract

Historically, different strategies utilized in engineering and technical graphics reflect growing concern about improvement in CAD instruction and the introduction of product quality data in curricular activities. Our vision was that early introduction of quality criteria through "good practices" is feasible and increases the quality, robustness, and reliability of CAD models. This paper describes a strategy applied to improve the knowledge of novice CAD users on the use of geometric constraints in 2D parametric profiles. This approach consists of supplementing student training with activities in order to provide rapid and effective feedback. A Chi-Squared Test was performed to assess the effectiveness of this strategy, indicating that trainees need continuous and additional autonomous learning to create quality 2D parametric pro les. Future work will include developments to promote student awareness of the need for quality in 3D models using an online checker that acts as a filter of semantic quality errors while providing feedback.