Topological optimization design method for high-speed vertical machining centre long-span beam

A vertical machining center and topology optimization technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as expensive, restricting the development speed of automobiles and energy, and affecting the rapid development of the national economy, so as to ensure availability and improve The effect of optimizing efficiency

Inactive Publication Date: 2011-01-19
DALIAN UNIV OF TECH
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Problems solved by technology

In addition, the price of all high-speed machining centers imported into my country is very expensive, which largely limits the development speed of my country's core manufacturing industries such as automobiles and energy, and seriously affects the rapid development of my country's national economy.

Method used

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  • Topological optimization design method for high-speed vertical machining centre long-span beam
  • Topological optimization design method for high-speed vertical machining centre long-span beam
  • Topological optimization design method for high-speed vertical machining centre long-span beam

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Experimental program
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Embodiment

[0042] (1) Preliminary basic analysis

[0043] (1) Model simplification: The beam of the high-speed machining center is a structural casting, so according to the principle of model simplification, remove all chamfers in the model, remove holes with a diameter of less than 10mm and bosses with a height of less than 10mm, and remove parts that are not directly stressed. Positioning assembly structure such as cavity.

[0044] (2) Meshing: Before meshing, material properties need to be defined. The beam material is cast iron, the material density is 7.2g / cm 2 , Poisson's ratio is 0.28, and Young's modulus is 1.1E5 MPa. The specific steps of meshing are as follows: firstly perform free meshing of the overall structure and select default values ​​for the mesh density parameters; then perform mesh refinement on the beam constraints and load application positions to refine the area mesh density to 3 times. The final number of finite element meshes is 76522 and the number of nodes is 147...

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Abstract

The invention belongs to the technical field of mechanical design and relates to a topological optimization design method for a high-speed vertical machining centre long-span beam. The method is mainly for the topological optimization of the three-dimensional solid structure of the long-span beam. The method consists two parts of early basis analysis and topological optimization design; the early basis analysis is to grasp the static and dynamic properties of the original beam, find out the parts of relatively weak static and dynamic properties and perform structural topological optimization on the beam correspondingly; and in the later topological optimization design, based on the result of the basic analysis, the later structural topological optimization including two-dimensional topological optimization and three-dimensional topological optimization of the beam is performed according to the characteristics of the beam. In the topological optimization method, a density method is adopted, the volume fraction response is used as a constraint function, and the static strain energy response is used as a target function; and finally an innovative model is established again according to the results of the two-dimensional and three-dimensional topological optimization analysis. The structural topological optimization method has the advantages of improving the optimization efficiency, along with accurate and reliable optimized results.

Description

Technical field [0001] The invention belongs to the technical field of mechanical design, and relates to a structural topology optimization design of a cross beam, a key component of a high-speed vertical machining center. It mainly optimizes the topology of the three-dimensional solid structure of a large-span beam, and proposes a complete set of large-span beam topology Optimize the design method to make the dynamic and static performance of the beam meet the design requirements. technical background [0002] Aerospace, military industry, automobiles, energy and other fields are the main areas supporting the growth of the national economy, and high-speed machining centers are one of the key equipment urgently needed in these fields. The application of high-speed machining center machine tools is mainly concentrated in the production of key parts and components in the fields of aerospace, military industry, automobiles, and energy. The high-speed, high-efficiency flexible produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 丛明赵强韩滔杜宇刘冬
Owner DALIAN UNIV OF TECH
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