Structural optimization of the cross-beam of a gantry machine tool based on grey relational analysis

Liu, Shihao; Li, Yue; Yulan, Liao; Zhang, Guo

doi:10.1007/s00158-013-1041-3

Cited by 27 publications

(15 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2) Sensitivity analysis In order to analyze the influence of the two parameters P8 and P9 on the bionic CNC turntable, sensitivity analysis is required for both. Sensitivity analysis mainly refers to the degree to which the objective variable is affected when the design variable in the model changes [35]. It should be explained that in the sensitivity analysis of variables to a certain objective, the greater the absolute value of the sensitivity of the variable is, the greater the influence of the variable on the objective is; if the sensitivity value is negative, it means that the variable has the opposite change trend to the objective; if the sensitivity value is positive, it means that the variable has the same change trend as the objective.…”

Section: Response Surface Optimization Analysis (1) Response Analysismentioning

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

View full text Add to dashboard Cite

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.

show abstract

Section: Response Surface Optimization Analysis (1) Response Analysismentioning

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

View full text Add to dashboard Cite

show abstract

“…The comparison shows that fuzzy comprehensive evaluation has the optimal effect, while TOPSIS has the worst. Liu et al [17] established four optimization models of beam structures through finite element analysis of static and dynamic performance parameters. Finally, the optimal design scheme was determined by the analytic hierarchy process (AHP).…”

Section: State Of the Artmentioning

confidence: 99%

“…(15) Using the evaluation indicator matrix A, Equation (9) and (10), the evaluation matrix was obtained as follows: (16) The fuzzy evaluation matrix of the beam scheme was obtained using Equation (11) and (12): (17) Scheme 4 is the optimal design of the beam structure, with a #-shaped reinforcing-plate structure with a thickness of 20 mm. Meanwhile, the guide rail adopted a side-hanging layout.…”

Section: Optimization Of Beam Designmentioning

confidence: 99%

Structural Design and Optimization in the Beam of a Five-axis Gantry Machining Center

Li¹,

Huang²,

Zhou³

2020

JESTR

View full text Add to dashboard Cite

Five-axis gantry machining centers are strategic equipment urgently needed for modern defense industry. These centers are also the basic manufacturing equipment for modern molds. Beams, which can affect the performance of the entire machine, are main components of the five-axis gantry machining center. This study proposed decision-making and optimizing methods for the beam design to improve the static and dynamic mechanical properties of beams and the quality and precision of processed products. Aiming at the multifactor and multilevel structure characteristics of beams, eight representative parameter combinations were established by orthogonal experiment as the design scheme of the beam structure. The software of finite element analysis was employed to analyze the static and dynamic characteristics of each beam and obtain their indicators. Meanwhile, a combined weighting method based on the entropy and fuzzy analytic hierarchy process was used to determine the weight value of each evaluation indicator. A fuzzy comprehensive evaluation method was applied to the multi-objective optimization of the beam structure design. Consequently, the parameter combination of the optimal scheme was finally determined to be "#"-shaped stiffened panels with a thickness of 20 mm in the side-mounted lead rail. The sensitivity of key dimensions was analyzed, and six key dimensions were selected for optimization. Results show that D8 has the largest influence on the performance of crossbeams. After optimization, the total deformation, maximum equivalent stress, and mass of the beam are reduced by 3.207%, 13.619%, and 2.457%, respectively. Meanwhile, the first-order natural frequency is increased by 1.047%. The present work improves the dynamic and static performances of beams and realizes a light-weight design. Moreover, this study shows strong engineering practicability and provides new ideas for the structural design and optimization of other key components in computerized numerical control (CNC) machining centers.

show abstract

“…To achieve high-efficiency machining of these high-precision large-scale complex parts, a major method is to use a large gantry machine tool for composite machining (Guo et al, 2016). As gantry machine tool structure is complex and has a large number of parts, repeated modeling and analysis process will waste a lot of time and effort when conducting lightweight structural optimization design for serialized gantry machine tools (Liu et al, 2014). In addition, due to the variety of types and models of gantry machine tools, they are divided into different series according to the features such as the weight and structure of the work pieces.…”

Section: Introductionmentioning

confidence: 99%

Study on lightweight structural optimization design system for gantry machine tool

Liu

Mao

2019

Concurrent Engineering

Self Cite

View full text Add to dashboard Cite

In order to improve the efficiency and effectiveness of the lightweight design of the gantry machine tool, a lightweight structural optimization design system for the gantry machine tool was constructed. Serialized gantry machine tools were parametrically modeled, and a load model with multiple operating conditions was established. A twice optimization design method integrating zero-order optimization, parameter rounding, and structural re-optimization was proposed. Using the proposed method, a lightweight structural optimization design system for gantry machine tool with parametric design, lightweight design, and other functions was developed. The developed gantry machine tool lightweight structural optimization design system was applied to complete the lightweight structural optimization design of gantry frame of a certain gantry machine tool, so the structural parameters of the gantry frame were optimized. Although the maximum stress and the maximum deformation of the gantry frame increases within the allowable range, the experimental comparison before and after the optimization shows that the mass of the whole gantry frame is reduced by 9.24%, which is beneficial to save the manufacturing cost. The research results show that the constructed lightweight structural optimization design system of the gantry machine tool has high engineering practicality.

show abstract

Structural optimization of the cross-beam of a gantry machine tool based on grey relational analysis

Cited by 27 publications

References 6 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

Structural Design and Optimization in the Beam of a Five-axis Gantry Machining Center

Study on lightweight structural optimization design system for gantry machine tool

Contact Info

Product

Resources

About