Computer-aided tolerance allocation of compliant ortho-planar spring mechanism. (2016)

• Record Type: Journal Article
• Authors: Valentini, Pier Paolo; Pezzuti, Eugenio
• Is Part Of: International journal of computer applications technology. Volume 53:Number 4(2016)
• Page Start: 369
• Page End: 374
• Publication Date: 2016
• Subjects: computer-aided tolerance allocation -- flexible components -- compliant mechanisms -- ortho-planar springs -- compliance effects -- structural resistance -- geometrical tolerance allocation -- finite element method -- FEM -- modelling -- constrained optimisation; Technology -- Data processing -- Periodicals; 620.00285
• Languages: English
• ISSNs: 0952-8091

Abstract

The allocation of the right tolerances is one of the most important phases in the design process of mechanical devices and systems. In general, the choice has to take into account the manufacturing costs and limitations, looking at the specific functionality of the device and the assemblability of parts. In the case of flexible components, the designer has to include the evaluation of the compliance effects and the structural resistance. The paper discusses a numerical methodology for addressing the problem of the geometrical tolerance allocation for the compliant ortho-planar spring. The methodology is based on the definition of the functionality and resistance objective functions by means of finite element models. Numerical constrained optimisation is then applied to find the suitable combination of tolerance parameters acting on the main dimensions.