Parameterize Modeling And Multi-Objective Optimization Of Large Scale Planomiller Beam Structure

Large scale planomiller is one of the important equipments in machining and manufacturing manufacturing, known for its speediness and high precision. The beam has large span which causes the instability of processing,so that relevant designer have been contributing to performance study on the large span beam in the long term. With the development of highly intelligent, integrated CAD and CAE software. The finite element analysis software was used to establish the model of machine tool components and simulate the practical processing,which provides guidance for later improvement and optimization.The thesis uses some large scale planomiller as the starting point,which is being developed by Hanchuan machine tool milling machine, to analyze the existing problems.The planomiller is an independent research and development of mechanical equipment in our country. After the successful trial production, the precision of the machine can not meet the design requirements. On the whole, it has a higher starting point in designing and developing,but the performance of machine tool is still need to be improved, One of the main problems is that the beam structure is not reasonable,which causes precision non-compliance of workpiece. It will greatly enhance the international competitiveness of the products if we can solve this problem.This paper carries on parametric modeling of the beam by Solidworks of mainstream modeling software and reasearch on static and dynamic of finite element analysis by large CAE software ANSYS Workbench. The analysis results show that the static performance of beam can meet the requirements, but dynamic performance is poor for the reason that the first-order modal is easy to be excited, which is considered to optimize and analyze the beam.Making the first-order modal and quality as the optimization objective, and performing the multi-objective optimization based on response surface method by Design Exploration module Ansys Workbench. The results of multi-objective optimization show thatthe first-order modal beam improved 7.2% and the weight reduced 2.4%. Two aspects of the product performance and economy have been improved.Finally, using Shape Optimization(Beta) to remove the material on the top surface of the beam, which provides ideas for further analysis.