Parametric Modeling And Mechanical Event Simulation For The Work Device Of Loader

Loader is a kind of engineering machine with the features of simple and convenient maneuverability. It is widely applied to the diggings and construction place. The application of loader will improve the work efficiency and avoid the waste of manpower and material resources. In recent years, many research organizations in our country have been doing some research on the small size engineering machine, especially on loader and grab, in order to enhance the performance and the quality of these machines. Although we have made progress, there is a technology wide gap between our institute and aboard institute on study level. Therefore, in order to develop engineering construction equipments which are more economical and more efficient, it is necessary to synthetically study the structure and motion of loader's work device. The aim is to work out the computing analysis which is the basis of designing machines.This paper's object is TP-link work device of wheel loader made by Volvo Company. This paper analyzes the structural characteristic of this loader and mechanical characteristic after fully studying on the constitution of this wheel loader and the operation conditions. And the result of these analyses offers definite reference on the aspect of the schematic design. Considering the character of the product, this paper analyzes the distributing of stress and strain when the loader is in the most critical position. This paper also analyzes the change trend of the node's stress and strain on the device in the process of untreading, raising and dumping. The paper creates a parameterized modeling and programs procedure for the TP-link work device of wheel loader with the Visual Basic Language and APDL which is a part of ANSYS. And then estimate the schematic design. This paper model the TP-link work device of wheel loader respective in ANSYS and CATIA. The one building in ANSYS was for static analysis and the other one was for dynamic analysis.I try to start this paper with the conjuncts point of mechanic engineering and finite element method. This paper mainly researches the TP-link working device of wheel loader. The following main tasks are arrived in two aspects:The first one: secondary develop is base on ANSYS system. Parametric product was made through out the visual panel of VBA and the analysis parameter design language (APDL). The method we used was on feature-based product modeling. At the position that unites horizontal insert with handling, we can analysis the working device quickly in batch mode of ANSYS. Take the 916 loader for instance; I get the load in usual method and append some limit to prevent the interference when put parameter to the software. After analyzed, I get the value and distribution of stress and strain in each part of the TP-link working device in this condition. At present, the material for working device is 16Mn or Q235. Compare the two materials in physical and chemic characteristic; we give some advice for the TP-link working device.The secondary part: The dynamic analysis of TP-link working device of wheel loader means of simulation the working device during the working process which include handling stage, raise stage and dump stage. Parts used in this segment were modeled in CATIA and assemble these parts in Assembly Design. Opened the model in ALGOR, and then meshed and analyzed it. The value of initial load during working process was the same with that used in static analysis, but the load change as another expression. Stress and strain of the node on the working device changing with time, and then it form a curve during the working process which contents the handling, raising and dumping. Then we get the change of distribution by time. And this distribution is the distribution of nodal stress and strain on the lifting arm,rocker arm and so on in the working device. After comparing the working device which is applying inertia force with the working device which is not applying inertia force, this paper gives the result how the inertia force interfere the parts of working device during the working process. We get the conclusion that it's about thirty MPa that the inertia force brought to the parts'stress in the three stages.