A study of severe flange wrinkling in first-pass conventional spinning of hemispherical part

Kong, Qingshuai; Yu, Zhongqi; Zhao, Yixi; Wang, Hao; Lin, Zhongqin

doi:10.1007/s00170-017-0744-9

Cited by 20 publications

(5 citation statements)

References 25 publications

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“…Kong et al [19] found that the compressive stress on the outer edge causes a slight wrinkling defect, which has little effect on the quality of the final part and can be smoothed out. However, the compressive stress on the inner part causes a severe wrinkling defect, which is not able to be recovered.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

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Effect of Intermediate Path on Post-Wrinkle Initiation of the Multi-Pass Metal Spinning Process: Analysis in the Rotating Reference Frame

Nguyen,

Champliaud,

2024

JMMP

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The metal spinning process has been observed in recent major investigations carried out using finite element analysis. One interesting idea has proposed simulating a rotating disc for the simulation of the metal spinning process to reduce computational time. The development of this concept is presented in this paper, including the formal mathematical transformation from the inertial frame to the rotating reference frame, specific FEM configurations with mesh sizes based on a minimized aspect ratio, a mesh convergence study, and the application of a feed rate scale. Furthermore, in the context of the rotating reference frame, the flange geometry after wrinkle initiation is investigated, including the number of peaks and their amplitudes. Using this new approach, it was found that the number of peaks gradually increases from two to eight peaks while their amplitude decreases. In the case of severe wrinkles, the number of peaks stays at four while the amplitude increases dramatically. The intermediate path proves capable of increasing the number of peaks while maintaining a low amplitude. These results will make it possible to design new paths, facilitating the production of defect-free spun parts.

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Section: Introduction and Literature Reviewmentioning

confidence: 99%

“…While the roller path can be designed by using the wrinkling predictive model with the objective of avoiding wrinkle initiation, a minor wrinkle flange can be smoothed out, as observed by [19,22]. Some prediction models show that a higher forming depth can be used to avoid wrinkling [22].…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Effect of Intermediate Path on Post-Wrinkle Initiation of the Multi-Pass Metal Spinning Process: Analysis in the Rotating Reference Frame

Nguyen,

Champliaud,

2024

JMMP

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“…The most common defects in the spinning process are wrinkling, circumferential crack and radial crack. However, the wrinkling is the only failure which has been conducted so far by some authors such as (Chen et al 2019;Kong, Yu, Zhao, Wang and Lin 2017) . On the review of spinning process (Music, Allwood and Kawai 2010), the circumferential crack can be observed intuitively by the high tensile radial stress.…”

Section: Introductionmentioning

confidence: 99%

Selection of training methods in systems dedicated to detection of chemical hazards

Dobrowolska-Opała¹,

Gudzbeler²

2020

Proceedings of the 19th International Conference on Modeling &Amp; Applied Simulation (MAS 2020)

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The paper presents the process of training methods’ selection in systems dedicated to detection of chemical hazards. By examining most common training methods used in detection systems, authors indicates which of them are the most relevant to hazardous chemical substance detection systems, assuming that basic efforts focus on the system as the whole (mainly on detection components) rather than the training module. Furthermore, the indicated methods are characterized in detail and combined with overall utility and economic analysis related to the dimension of the resources involved in the work on the entire project (by the example of the EU-SENSE project). In order to study the training methods and the factors influencing their choice, two research methods were used: (1) in-depth analysis of the literature on the subject of training tools in the field of crisis management and IT solutions, and (2) the case study of the EU-SENSE project (its training module).

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“…Generally, the roller traces a path that is used for single or multiple passes until the sheet resembles the mandrel geometry [1,2]. Different shapes, such as cylindrical, conical, or spherical, can be formed using suitable mandrel geometries and roller traces [3][4][5]. The design of roller paths required to make defect-free spun products remains an art [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Geometrical Accuracy of the CNC Multi-Pass Sheet Metal Spinning Process

Abd-Alrazzaq¹,

Ahmed²,

Younes³

2018

JMMP

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Abstract:The geometrical accuracy of multi-pass sheet metal spinning products is crucial in many applications. Aerospace, petroleum, and chemical industries motivated the development of modern spun components of complicated shapes with special functionality, but a substantial research lag exists behind this progress. Due to the localized plastic deformation involved, careful control of dimensions and form is required in spinning procedures. In this study, two sets of experiments were implemented for cup manufacturing using a retrofitted computer numerically controlled (CNC) spinning machine to identify the critical factors affecting product geometry and reveal their influence on the shape accuracy of the spun cups. The first set is a screening experiment to determine the most significant parameters and the second provides the optimum processing conditions affecting cup quality. The feed ratio, number of spin-forming passes, spinning ratio, and lubrication were found to have the most important effect on the geometry of the spun cups. Optimum quality with a higher processing speed (productivity) was achieved under a lubricated condition using a larger number of spin-forming passes at a high feed ratio, diminishing the commonly adopted rule of slow spinning for accurate products and reflecting a significance for state-of-the-art spinning practice. The findings of this paper introduce a basis for a spinning quality database.

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A study of severe flange wrinkling in first-pass conventional spinning of hemispherical part

Cited by 20 publications

References 25 publications

Effect of Intermediate Path on Post-Wrinkle Initiation of the Multi-Pass Metal Spinning Process: Analysis in the Rotating Reference Frame

Effect of Intermediate Path on Post-Wrinkle Initiation of the Multi-Pass Metal Spinning Process: Analysis in the Rotating Reference Frame

Selection of training methods in systems dedicated to detection of chemical hazards

Experimental Investigation on the Geometrical Accuracy of the CNC Multi-Pass Sheet Metal Spinning Process

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