Modeling And Optimization Design For The Working Device Of Wheel Loader

Work devices of loader directly affect the work performance of machine and further the work efficiency. And the design level of working devices directly determines the performance of machine and market competitiveness. Before, the design of working devices basically follows the traditional analogy and mapping trial and error method. The accuracy of this method is low, the period is long and it is difficult to obtain a satisfied design. Although during a long period time we have accumulated some experience in design, the working efficiency is still low. So it is more and more important to use advanced design method on working devices analysis and study.In this paper, by studying the knowledge of wheel loader deeply, the structure is designed. According to the requirements of wheel loader parameters, by learning about the working devices law of motion, we do some kinematic analysis on the performances of translation, automatic flat and unload angle while working. Then analyse the force situation of the working devices and calculate the force on bucket, linkage, lever and arm while working.By using the CATIA 3D modeling software, we set up the parametric model of loader main components, assemble the 3D modeling parts of working device and check whether there is interference between parts and whether the movements is in compliance with design requirements.By using the finite element analysis module in CATIA to analyse the arm static stress, time for models import and export between different software interfaces is saved and design efficiency is improved. After the calculation, we get the Von Mises stress color pictures of finite element analysis from which we can find the most dangerous area. Then optimize the strength and stiffness in this area in order to reduce stress concentration and dredge it. After the finite element analysis of arm geometry again, we obtain the results meet the design requirements.By using the established working devices 3D model and importing into ADAMS environment, we simulate the working devices. After parameterize the model, establish design variables, impose constrains and set up the objective function, we optimize the model and get the optimized translation curve of bucket from which we greatly reduce the bucket swing angle and improve the translation performance.Modern design method is used in this paper which improves the traditional design manner and greatly improves the efficiency of engineer. It also plays a guide role for product development and can bring greater economic benefits for the enterprise.