Projeto de substituição de peça soldada por fundida aplicado a componente de suspensão de semirreboque

Abstract

An essential component in the mechanical suspension of road implements is called "rocker arm". Its main function is to absorb the unevenness of the floor and distribute the forces evenly to the axles, providing greater stability for the semi-trailer. In view of the reduction in mass, manufacturing costs and the possibility of using removable scrubs, this work aimed to design a cast rocker arm to enable the replacement of the welded rocker arm manufacturing process. For that, the acting loads no components were taken from free-body diagrams. In an attempt to dynamic loads from the vehicle in motion, multiplier factors were applied to the static loads used in the analyses. Analyzes available by the finite element method were then carried out on the welded component and on the developed versions of the cast component. Comparing the stresses and displacements of the welded component with the versions of the cast component, it was observed that all versions of the cast had satisfactory tensions and displacement. Analyzing the stresses, displacements and mass, it was observed that the fourth version of the cast component presents the best cost-benefit ratio. Comparing the masses of the welded component and the fourth version of the cast, there was an increase of 8.15% for the cast component. However, the estimated cost of the cast component presented a reduction of 34.73%. It was verified that the use of removable scrubs is also possible through screw correction. However, to validate the project, it is proposed to build a physical prototype in order to assess its behavior in the field and thus perform improvements and even mass reduction.[resumo fornecido pelo autor]