Otimização de um link “H” de conexão lança-concha de uma escavadeira hidráulica John Deere modelo 210G/GLC

Abstract

The incessant demand for increased productivity and reliability of equipment working on constructions and services provisions has generated an increasingly competitive market and new technologies involved in the processes of simulation and machining has gradually generated even more equipment with advanced robustness, engendering more and more reliable and productive machines. The present work deals with the dimensioning of an "H" link of the hydraulic excavator cones of the 210G / GLC excavator, starting from a history of recurrent faults in this part, proposing a new geometry and selecting a new type of material for it. For this, a survey was made on possible types of failures, mechanisms and dynamics of the machines, types of fractures in metallic materials, importance of the maintenance to guarantee the life of the equipment, computational simulation and reliability of the same. Then the behavior of the part in service and the critical conditions of loading were analyzed. When all of the aforementioned factors were evaluated, a new part was designed using Solidworks software, with new dimensions (respecting the restrictive characteristics of the design, such as pin size and bearing distance) and new material was selected, reducing the possibility of failure and breaks of the mechanism on services, increasing the productivity of the excavators of the model under study, preventing unexpected stops and increasing the safety of the work done by such equipment