Purpose There are many investigations in design methodologies, but there are also divergences and convergences as there are so many points of view. This study aims to evaluate to corroborate and deepen other researchers’ findings, dissipate divergences and provide directing to future work on the subject from a methodological and convergent perspective. Design/methodology/approach This study analyzes the previous reviews (about 15 reviews) and based on the consensus and the classifications provided by these authors, a significant sample of research is analyzed in the design for additive manufacturing (DFAM) theme (approximately 80 articles until June of 2017 and approximately 280–300 articles until February of 2019) through descriptive statistics, to corroborate and deepen the findings of other researchers. Findings Throughout this work, this paper found statistics indicating that the main areas studied are: multiple objective optimizations, execution of the design, general DFAM and DFAM for functional performance. Among the main conclusions: there is a lack of innovation in the products developed with the methodologies, there is a lack of exhaustivity in the methodologies, there are few efforts to include environmental aspects in the methodologies, many of the methods include economic and cost evaluation, but are not very explicit and broad (sustainability evaluation), it is necessary to consider a greater variety of functions, among other conclusions Originality/value The novelty in this study is the methodology. It is very objective, comprehensive and quantitative. The starting point is not the case studies nor the qualitative criteria, but the figures and quantities of methodologies. The main contribution of this review article is to guide future work on the subject from a methodological and convergent perspective and this article provides a broad database with articles containing information on many issues to make decisions: design methodology; optimization; processes, selection of parts and materials; cost and product management; mechanical, electrical and thermal properties; health and environmental impact, etc.

Abstract. Parallel mechanisms with reduced Degree Of Freedom (DOF) have grown in importance for industry and researchers as they o er a simpler architecture and lower manufacturing/operating costs with great performance. In this paper, a two-degree-offreedom parallel robot is proposed and analyzed. The robot with a xed base, a moving platform, and three legs achieve translational and rotational motions through actuation on prismatic and revolute joints and can be applied to pick-and-place applications, vehicle simulators, etc. Through homogeneous transformation matrices and Sylvesters dialytic elimination method, a closed-form solution for direct kinematics is obtained for all possible assembly modes. Inverse kinematics is solved by the closed-form solution as well. This greatly decreases computational time, suggesting the optimality of the proposed approach. A case study is investigated to validate the solutions found and is compared with a CAD model to corroborate the obtained results. Finally, a workspace calculation is carried out for di erent geometrical parameters of the robot.

No abstract

No abstract