Simplification of CAD model of excavator working device

ZHU Kun， JI Ai-min
（College of Mechanical and Electronic Engineering， Hohai University， Changzhou 213022， China）

Abstract： Aiming at the problems of poor quality of mesh generation and long time of calculation of the CAD model of hydraulic excavator's working device，the simplification process of the models were realized by the program with the tools of secondary development of UG software and C++ language to enhance the analysis precision and design efficiency of the finite element model of excavator's working device. Firstly，the characters with no or little effect to the analysis result were removed by the program compiled by C++ language and secondary development function of UG/Open API. Secondly，the midsurface model of working device was extracted automatically by the program. Finally，the midsurface model was improved by the process of connecting and stitching to the benefit of mesh generation and analysis．The results indicate that the quality of mesh generation and analysis precision are improved with the above simplification procedures of the model，the analysis time is greatly reduced in the CAE software and the efficiency is riched.
Key words： UG；secondary development；detailed feature；midsurface