Theoretical prediction of flange wrinkling in first-pass conventional spinning of hemispherical part

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

doi:10.1016/j.jmatprotec.2016.07.031

Cited by 32 publications

(15 citation statements)

References 24 publications

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“…[9] sıvama parametrelerinin kalınlığa olan etkileri incelemek için, 1 mm kalınlığında Al 1060 malzemeyi konik sıvamışlardır. İş parçası cidar kalınlığının, mandrel devir hızı ve ilerleme hızı arttıkça azaldığını [10,11] deneysel ve sayısal olarak göstermişlerdir.…”

Section: Quigley Ve Monaghanunclassified

Aisi 304 Paslanmaz Çeli̇ği̇n Sivama Parametreleri̇ni̇n Sonlu Elemanlar Yöntemi̇yle Beli̇rlenmesi̇

Yaman¹,

Özcan²,

Tekıner³

2018

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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Section: Quigley Ve Monaghanunclassified

Aisi 304 Paslanmaz Çeli̇ği̇n Sivama Parametreleri̇ni̇n Sonlu Elemanlar Yöntemi̇yle Beli̇rlenmesi̇

Yaman¹,

Özcan²,

Tekıner³

2018

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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“…Numerous researchers have attempted to study wrinkling theoretically and experimentally. Kong et al 2 established a finite element model to study the deformation characteristics of the material in conventional spinning and found two stable compressive stress rings distributed at the middle surface of the formed part. The outer stress ring distributed at the flange was considered to be the key factor of flange wrinkling.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental studies on wrinkling control methods of sheet metal part with high curvature and large flange in rubber forming

Chen

Bai²,

Jiang

et al. 2019

Advances in Mechanical Engineering

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Wrinkling is one of the main failure modes in sheet metal forming process and may lead to assembly problems of the parts. Control of wrinkling is difficult due to the complex deformation behavior of the sheet metal. A finite element model for side blankholder method to control wrinkling was established and used for the simulation. Trials and simulations were conducted to analyze the parameters of wrinkling characteristics. Results show that with the increase in the angle of the side blankholder, the resistance force of the side blankholder decreases. The blank length on the side blankholder should be small enough. The fillet radius of the side blankholder should be large enough to reduce the deformation. The bottom gap between the die and the side blankholder cannot be too large because the support of the blank will decrease in the forming process. In order to verify the simulation results, three blank lengths (20, 15, and 5 mm) over the side blankholder were used in the experiment. The results of the comparison tests testify the reliability of the simulation. The optimal parameter of the blank length is 5 mm. A new clamp method was designed for wrinkling control to overcome the shortcomings of the side blankholder method. The precision of the part met the requirement using soft rubber and two layers of rubber plates.

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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%

“…The process can be fully automated by CNC machines, particularly when tight tolerances are necessary [7]. With the CNC programmed machine, there is no need for a highly skilled spinner and operator-related uncertainties along with operator-to-operator variability are eliminated with a high repeatability and accuracy [4].…”

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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Theoretical prediction of flange wrinkling in first-pass conventional spinning of hemispherical part

Cited by 32 publications

References 24 publications

Aisi 304 Paslanmaz Çeli̇ği̇n Sivama Parametreleri̇ni̇n Sonlu Elemanlar Yöntemi̇yle Beli̇rlenmesi̇

Aisi 304 Paslanmaz Çeli̇ği̇n Sivama Parametreleri̇ni̇n Sonlu Elemanlar Yöntemi̇yle Beli̇rlenmesi̇

Numerical and experimental studies on wrinkling control methods of sheet metal part with high curvature and large flange in rubber forming

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

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