Lightweight Design Of Working Device For Loader

The working device is an important part of loaders,and its structural design will directly affect the fuel economy and production cost of loaders.Under the premise of guaranteeing the performance and cost control of the working device,safety and so on,the lightweight design technology,the new material technology and the manufacturing technology are combined to realize the lightening of the working device.It has become the direction of the research and development of the loader technology.Although the quality of loaders can be effectively reduced by using new materials,these new materials have complex manufacturing processes,high cost,and difficult to apply to loaders in a short time.Therefore,the lightweight design technology of working devices is a hot topic at present.This paper takes the working device of the ZL50 G wheel loader of Xugong Group as the research object,and carries out the statics analysis of five typical working conditions.On this basis,the lightweight design is carried out.The results show that the weight reduction of the working device is realized on the premise of satisfying the strength?stiffness.This paper studies the following 4 aspects:(1)the finite element modeling of the working device.First,the 3D model of the working device is created by using CATIA software,which is introduced into the Hypermesh software to simplify the geometry,to clean the geometry,to select the appropriate unit to mesh the work device,and to establish the finite element model of the working device.(2)static analysis of the working device.In order to predict the fatigue failure and bearing capacity of the working device in use,the strength analysis of the working device under five operating conditions of positive load insertion condition,positive load rising condition,partial load insertion condition,partial load rising and moving arm lifting unloading in the Hypermesh software is analyzed,and its stress and displacement cloud chart are obtained,and the working device is analyzed.Deformation and stress conditions are used to evaluate the static characteristics of the working device.The results show that the strength and rigidity of the device meet the requirements of application and have lightweight potential.(3)modal analysis of the working device.Through the modal analysis,the inherent frequency and natural mode of the arm are obtained,which provides a theoretical basis for the resonance of the working device,and provides a reliable reference for the optimization design of the follow-up work device.(4)arm lightweight design.In the thesis,based on the sensitivity analysis,the size of the working device is optimized.Secondly,the topology optimization of the manipulator is carried out,and then the strength and modal verification of the optimized model are verified.The analysis results show that the arm of the manipulator reduces the quality of the arm compared with the quality of the original arm by 4.68% under the condition of satisfying the performance constraints.The dynamic arm of the topology optimization reduces 281.1Kg before optimization,and realizes the light weight of the arm.It shows that the light weight of the arm is feasible,and the design of the moving arm in the future is good.It has some reference significance.