Investigation on the influence of the equivalent bending stiffness of the thin-walled parts on the machining deformation

Li, Bianhong; Gao, Hangshan; Deng, Hongbin; Pan, Hai Bin; Wang, Baoguo

doi:10.1007/s00170-018-2987-5

Cited by 19 publications

(7 citation statements)

References 35 publications

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“…Stiffening ribs will greatly improve the rigidity of the component. Machining deformations of thin-walled component with stiffening ribs can be obtained using the equivalent bending stiffness model [19][20].…”

Section: Machining Deformation Based On Energy and Equivalent Stiffne...mentioning

confidence: 99%

“…Stiffness of monolithic components is varied with the machining. Li et al [19] investigated the machining deformation of aircraft monolithic components by use of the equivalent bending stiffness model. The finite element methodand experiment results indicated that the machining deformation was sensitive to the stiffness of the component in the lengthwise direction, and it was not significantly influenced by the stiffness in width.…”

Section: Introductionmentioning

confidence: 99%

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Machining deformation analysis of aircraft monolithic components based on the energy method

Huang

Liu

et al. 2022

Int J Adv Manuf Technol

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Section: Machining Deformation Based On Energy and Equivalent Stiffne...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Machining deformation analysis of aircraft monolithic components based on the energy method

Huang

Liu

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…In 2019, Li et al [54] constructed a semi-analytical model considering biaxial blank residual stress to predict machining deformations of five thin-walled parts with different stiffening rib layouts, and the accuracy of the model was verified by FEM simulations and machining experiments. The results show that the machining deformation decreases with the increase of equivalent bending stiffness in the length direction, and the equivalent stiffness in the width direction has little effect on the overall machining deformation.…”

Section: Joining and Milling Techniquesmentioning

confidence: 99%

The Advancement of 7XXX Series Aluminum Alloys for Aircraft Structures: A Review

Zhou

Liu

Zhang

2021

Metals

151

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7XXX series aluminum alloys (Al 7XXX alloys) are widely used in bearing components, such as aircraft frame, spars and stringers, for their high specific strength, high specific stiffness, high toughness, excellent processing, and welding performance. Therefore, Al 7XXX alloys are the most important structural materials in aviation. In this present review, the development tendency and the main applications of Al 7XXX alloys for aircraft structures are introduced, and the existing problems are simply discussed. Also, the heat treatment processes for improving the properties are compared and analyzed. It is the most important measures that optimizing alloy composition and improving heat treatment process are to enhance the comprehensive properties of Al 7XXX alloys. Among the method, solid solution, quenching, and aging of Al 7XXX alloys are the most significant. We introduce the effects of the three methods on the properties, and forecast the development direction of the properties, compositions, and heat treatments and the solution to the corrosion prediction problem for the next generation of Al 7XXX alloys for aircraft structures. The next generation of Al 7XXX alloys should be higher strength, higher toughness, higher damage tolerance, higher hardenability, and better corrosion resistance. It is urgent requirements to develop or invent new heat treatment regime. We should construct a novel corrosion prediction model for Al 7XXX alloys via confirming the surface corrosion environments and selecting the accurate and reliable electrochemical measurements.

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“…However, finite element analysis and physical measurement are very time-consuming and challenging to represent the changing stiffness characteristics of the entire machining process. In addition, Li et al [20] studied the impact of TWP equivalent bending stiffness on the machining deformation based on experiments and finite element simulations. Gao et al [18,21] investigated the effect of stiffness on dimensional stability.…”

Section: Introductionmentioning

confidence: 99%

A novel multi-pass machining accuracy prediction method for thin-walled parts

Huang

Wang

et al. 2023

Int J Adv Manuf Technol

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Thin-Walled Parts (TWP) are widely used in aerospace, whose service performance is significantly affected by the machining accuracy. Considering the poor stiffness of TWP, multi-pass machining is used to machine TWP for better surface accuracy. However, it is difficult to accurately predict the final machining accuracy due to the surface topography error's propagation and accumulation in multi-pass machining. Therefore, this paper proposes a multi-pass machining accuracy prediction method for TWP based on dynamic factors (cutting force and stiffness). Firstly, a flexible cutting force prediction model, which considers the axial errors determined by the initial surface topography and part deflection, is proposed. Secondly, a Position-Pass-Dependent Stiffness (PPDS) model is established considering position-dependent of stiffness and multi-pass machining material removal. Finally, combining the two models above, a multi-pass machining accuracy prediction method based on Genetic Algorithm -Back Propagation (GA-BP) neural network is proposed. The experiments under various conditions have been carried out to validate the proposed method. The machining accuracy (flatness as an example) is as high as 90.8% using the method in this paper, while it is only 73.9% when the accumulative error is neglected. The proposed method can significantly improve the performance of machining accuracy prediction by analyzing the error propagation mechanism and the effect of dynamic factors between multi-pass machining. Furthermore, this also provides a theoretical basis for process parameters optimization and machining accuracy improvement in TWP machining.

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Investigation on the influence of the equivalent bending stiffness of the thin-walled parts on the machining deformation

Cited by 19 publications

References 35 publications

Machining deformation analysis of aircraft monolithic components based on the energy method

Machining deformation analysis of aircraft monolithic components based on the energy method

The Advancement of 7XXX Series Aluminum Alloys for Aircraft Structures: A Review

A novel multi-pass machining accuracy prediction method for thin-walled parts

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