A flexible shear spinning of truncated conical shells with a general-purpose mandrel

Kawai, Ken-ichi; Yang, Lei; Kudo, Hideaki

doi:10.1016/s0924-0136(01)00630-6

Cited by 46 publications

(21 citation statements)

References 1 publication

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“…The sine law is also realized in shear spinning of truncated conical shells with a general-purpose cylindrical mandrel as shown in Fig. 4 [4]. While a sudden change in the wall thickness is observed in Fig.…”

Section: Introductionmentioning

confidence: 71%

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A flexible shear spinning of axi-symmetrical shells with a general-purpose mandrel

Kawai

Yang

Kudo

2007

Journal of Materials Processing Technology

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Section: Introductionmentioning

confidence: 71%

“…In the earlier papers [3,4], an experimental study was conducted to survey the technological possibility of the shear spinning of truncated conical shells with a cylindrical mandrel for general purposes. There exist forming limits to prevent the occurrence of wall fractures and flange wrinkles as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

A flexible shear spinning of axi-symmetrical shells with a general-purpose mandrel

Kawai

Yang

Kudo

2007

Journal of Materials Processing Technology

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“…lower thickness reduction, tight roundness variation, and higher surface quality, and allow high spinning ratios. Kawai et al [38] recorded better roundness of the spun products of A 1050-O annealed aluminum blanks than those of A 1050-H. Razani et al [39] observed higher out-of-roundness as the feed rate rises. However, Imamura et al [40] proved that as the feed ratio increases, the roundness error decreases for higher forming heights.…”

Section: Materials and Experimental Methodsmentioning

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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“…The die-less spinning which was proposed by Kawai et al (2007) is developed from the conventional spinning. Kawai et al (2001) developed the process by research on the die-less spinning of truncated conical shells and hemispherical shells. They showed that the sine law is also realized in the die-less spinning of conical parts, but the hemispherical parts have little shear spinning properties.…”

Section: Introductionmentioning

confidence: 99%

A numerical study of the effects of roller paths on dimensional precision in die-less spinning of sheet metal

Jin

et al. 2014

J. Zheijang Univ.-Sci.

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Die-less spinning eliminates the dependence upon the mandrel of traditional spinning, but bringing about comparatively poor dimensional accuracy which needs to be improved. In this paper, roller paths in the first pass of die-less spinning, including concave, convex, linear and combined ones are parameterized according to the degree of bending and their effects on dimensional precision (thickness variation and shape deviation) have been studied by using experiments of finite element (FE) analysis. The effects of roller paths on thickness variation, shape deviation, tool forces, and stress and strain variations have been analyzed numerically. The results showed that for concave roller paths, the thickness variation is not very sensitive to the degree of bending, while a low degree of bending of the roller path can result in a low shape deviation. For convex roller paths, a low degree of bending leads to both low thickness reduction and low shape deviation. Further research shows that a combined roller path with convex-concave curve could contribute a low shape deviation, while an inverse combined roller path gives better thickness precision.

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A flexible shear spinning of truncated conical shells with a general-purpose mandrel

Cited by 46 publications

References 1 publication

A flexible shear spinning of axi-symmetrical shells with a general-purpose mandrel

A flexible shear spinning of axi-symmetrical shells with a general-purpose mandrel

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

A numerical study of the effects of roller paths on dimensional precision in die-less spinning of sheet metal

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