New standard of dimensioning adapted to the programs CAD. Creation and unification of symbols dimensioning

摘要

Vectorl design of objects (CAD3D) indicates its dimensions according to standards previous to existence of the CAD3D systems. In many cases, it does not meet the needs of new Information and Communication Technologies (ICT), causing the repetition of dimensioning tasks in the successive stages of product development. The dimensional standards currently used, take a long product launch time. This research states a methodology for dimensioning which allows the designer to provide the graphical representation of the product with geometric and dimensional information, complete, accurate and universal; design time is shortened and productivity is increased. As result of this methodology a new international standard of dimensioning is proposed, which unifies the utilization of signs adapted to 3D design as alternative to those currently in use and allows obtaining clearer technical drawings and with less dimensions. This proposal for a new standard has been validated by a comparative review of the most widespread dimensioning standards.