Bionic Design for Column of Gantry Machining Center to Improve the Static and Dynamic Performance

Liu, Shihao; Ye, Wenhua; Lou, Peihuang; Chen, Weifang; Huang, Jungui; Xiao, Lili

doi:10.1155/2012/545931

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…After millions of years of evolution, creatures have formed various natural structures with excellent mechanical properties and light structure, which provides a large number of bionic prototypes and creative improvement methods for human beings to solve mechanical design problems [29]. It has become an important issue of structural bionic research to extract the useful configuration rules from the structure of organisms and apply them to the optimization design of machine tool's parts, and the optimization of the layout and shape of stiffeners in machine tool structural parts is one of the research contents.…”

Section: Bionic Design Methods For Cnc Turntablementioning

confidence: 99%

Bionic optimization design for a CNC turntable based on thermal–mechanical coupling effect

Liu

Mao

2020

J Braz. Soc. Mech. Sci. Eng.

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During the machining process, the thermal-mechanical coupling effect of CNC turntable is produced by the action of variable loads and various heat sources. In order to improve the static and dynamic characteristics under thermal-mechanical coupling effect, a novel bionic optimization design method for CNC turntable was proposed. The finite element modal analysis on a CNC turntable was carried out to obtain the weak link of its dynamic characteristics, and the thermal-mechanical coupling analysis on the CNC turntable was conduct to reveal the influence of the thermal-mechanical coupling effect on the dynamic characteristics of the CNC turntable. In view of the good mechanical properties of Victoria amazonica, bionic design for the CNC turntable was carried out based on the strong similarity of structure and function. The optimization objectives and design variables of bionic CNC turntable were selected according to the thermal-mechanical coupling and modal analysis results, and the influence law of the design variables on the optimization objectives was studied by sensitivity analysis method. The optimal solution to bionic CNC turntable was obtained through response surface optimization, which made the maximum deformation was reduced by 2.37%, the mass was reduced by 15.60%, and the first six order natural frequencies were increased. The feasibility of the proposed bionic optimization design method for CNC turntable was verified through comparing the first six order natural frequencies of modal experimental results with optimization results. Therefore, the bionic optimization method provides a new idea for structural design of CNC machine tools' parts to improve the static and dynamic characteristics.

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Section: Bionic Design Methods For Cnc Turntablementioning

confidence: 99%

Bionic optimization design for a CNC turntable based on thermal–mechanical coupling effect

Liu

Mao

2020

J Braz. Soc. Mech. Sci. Eng.

Self Cite

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“…Generally, the finite element method and finite volume method were used to simulate the temperature field of a CNC machine tool feed system [10]. In this paper, the finite element method is used.…”

Section: Temperature Field Analysis Theorymentioning

confidence: 99%

Influence of thermal-mechanical coupling effect on vibration of double-drive feed system

Huang¹,

Yuan²,

Wang³

2017

IJHT

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A double-drive feed system has the characteristics of complex loads and multi-thermal sources, so the dynamic performance of the feed system is a thermal-mechanical coupling problem. In this paper, the mechanism of the thermal-mechanical coupling effect on the vibration of the machine tool feed system is discussed. The effect of the thermal-mechanical coupling effect on the dynamic performance of the feed system was analyzed by experimental data, as well as the influence of the coupling effect on the structural deformation. The above results showed that a rising temperature made the natural frequency of the system decrease and the vibration amplitude of the feed system increase with a maximum rate of increase up to 14.06 ％ . Through experiment and simulation, the dynamic simulation and analysis method of the thermalmechanical coupling of a machine tool feed system are shown to be rational and feasible.

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“…Machine tool structures developed based on biological rib bone skeleton and ginkgo root system have been found to possess improved static stiffness and damping by 6%, with a considerable reduction in mass of 6%. 22,23 The requirement of both high stiffness and damping requirements has led to the use of composite materials to replace steel and CI to fabricate machine tool structures. 4,7 Epoxy granite (EG) is a type of mineral-based polymer composite that consists of crushed stones as aggregates bonded by thermoset-based epoxy resin matrix and has better mechanical characteristics compared to other PC composites.…”

Section: Introductionmentioning

confidence: 99%

Static and dynamic behavior of steel-reinforced epoxy granite CNC lathe bed using finite element analysis

Chinnuraj

Thyla

Elango³

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Machine tools are used to manufacture components with desired size, shape, and surface finish. The accuracy of machining is influenced by stiffness, structural damping, and long-term dimensional stability of the machine tool structures. Components machined using such machines exhibit more dimensional variations because of the excessive vibration during machining at higher speeds. Compared to conventional materials like cast iron, stone-based polymer composites such as epoxy granite have been found to provide improved damping characteristics, by seven to ten folds, due to which they are being considered for machine tool structures as alternate materials. The stiffness of structures made of epoxy granite can be enhanced by reinforcing with structural steel. The current work highlights the design and analysis of different steel reinforcements in the lathe bed made of the epoxy granite composite to achieve equivalent stiffness to that of cast iron bed for improved static and dynamic performances of the CNC lathe. A finite element model of the existing the cast iron bed was developed to evaluate the static (torsional rigidity) and dynamic characteristics (natural frequency) and the results were validated using the experimental results. Then finite element models of five different steel reinforcement designs of the epoxy granite bed were developed, and their static and dynamic behaviors were compared with the cast iron bed through numerical simulation using finite element analysis. The proposed design (Design-5) of the epoxy granite bed is found to have an improvement in dynamic characteristics by 4–10% with improved stiffness and offers a mass reduction of 22% compared to the cast iron bed, hence it can be used for the manufacture of the CNC lathe bed and other machine tool structures for enhanced performance.

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Bionic Design for Column of Gantry Machining Center to Improve the Static and Dynamic Performance

Cited by 4 publications

References 8 publications

Bionic optimization design for a CNC turntable based on thermal–mechanical coupling effect

Bionic optimization design for a CNC turntable based on thermal–mechanical coupling effect

Influence of thermal-mechanical coupling effect on vibration of double-drive feed system

Static and dynamic behavior of steel-reinforced epoxy granite CNC lathe bed using finite element analysis

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