A review of the mechanics of metal spinning

Music, Omer; Allwood, Julian M.; Kawai, Ken-ichi

doi:10.1016/j.jmatprotec.2009.08.021

Cited by 351 publications

(161 citation statements)

References 49 publications

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“…The main function of R 1 is to press down the blank previously and that of the R 2 is to form the blank. For the aluminum blank with diameter between 150~300 mm, the range of the fillet radius R 2 is 12~15 mm [2] . Therefore, the value of R 2 was selected as 12 mm, and the values of R 1 were selected as 25 mm, 30 mm and 45 mm respectively (as shown in Fig.2).…”

Section: Analysis Of Surface-profile Of Rollermentioning

confidence: 99%

“…Deep drawing spinning is a kind of forming process that the diameter of the blank is reduced mainly by the radial drawing, which is the most widely used conventional spin-forming process [1][2] . Shielding case of high voltage switch is a kind of thin-walled rotational part with deep cavity, which is usually manufactured by welding after stamping.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Surface-profile and Movement-path of Roller on Thickness Thinning during Multi-pass Deep Drawing Spinning

et al. 2016

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Abstract. Over thinning is a serious defect influencing the forming quality of spun workpiece during multi-pass deep drawing spinning. Surface-profile and movement-path of roller are the key factors influencing the thinning ratio of wall thickness of spun workpiece. The influence of surface-profile and movement-path of roller on thickness thinning were studied based on numerical simulation and experimental research, four groups of forming experiments were carried out under the combination of the different surface-profile of roller (R12 and R25-12) and movement-path of roller (spinning from the bottom of the blank and spinning from the middle of the blank). The results show that both the surface-profile and movement-path of roller have great influence on wall thickness thinning during multi-pass deep drawing spinning; and compared with the movement-path of roller, the influence of surface-profile of roller is more significant. The experimental results conform well to the simulation ones. It indicates that the FEA model established is reasonable and reliable.

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Section: Analysis Of Surface-profile Of Rollermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Surface-profile and Movement-path of Roller on Thickness Thinning during Multi-pass Deep Drawing Spinning

et al. 2016

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“…However the final thickness distribution of spun part is influenced considerably by the deviation ratio, defined as the gap between mandrel and roller, which may result in a deviation of the actual final thickness from the value determined by the Sine law. In shear spinning, various values of deviation ratios can be applied, such as positive, zero and negative deviation ratios, these are also known as under-spinning, true shear spinning and over-spinning respectively [2].…”

Section: Introductionmentioning

confidence: 99%

Mechanism of grain refinement of aluminium alloy in shear spinning under different deviation ratios

2016

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To investigate the grain refinement and its mechanism in shear spinning, microstructures of shear spun parts made by aluminium alloy under different deformation conditions, induced by different shear spinning deviation ratios, are studied. The results show that, after shear spinning, the microstructure is distributed symmetrically about a zone in sheet thickness defined as the neutral zone which is located between the inner surface and the middle plane of spun sheet thickness.Various deviation ratios in shear spinning can lead to grain refinement in different regions along thickness direction of the spun part. The microstructure characteristics indicate that the mechanism of grain refinement is due to the formation of deformation bands (DBs). It is observed that in DBs, parallel geometrically necessary boundaries (GNBs) formed by a zero deviation ratio and crossed GNBs formed by positive and negative deviation ratios are due to the different stress states induced by various deviation ratios in shear spinning. Due to the influence of grain refinement, micro hardness increases with the decreasing of the deviation ratio. The average value is increased by 16.04% under a negative deviation ratio compared to the initial micro hardness of the sheet. AbstractTo investigate the grain refinement and its mechanism in shear spinning, microstructures of shear spun parts made by aluminium alloy under different deformation conditions, induced by different shear spinning deviation ratios, are studied. The results show that, after shear spinning, the microstructure is distributed symmetrically about a zone in sheet thickness defined as the neutral zone which is located between the inner surface and the middle plane of spun sheet thickness. Various deviation ratios in shear spinning can lead to grain refinement in different regions along thickness direction of the spun part. The microstructure characteristics indicate that the mechanism of grain refinement is due to the formation of deformation bands (DBs). It is observed that in DBs, parallel geometrically necessary boundaries (GNBs) formed by a zero deviation ratio and crossed GNBs formed by positive and negative deviation ratios are due to the different stress states induced by various deviation ratios in shear spinning. Due to the influence of grain refinement, micro hardness increases with the decreasing of the deviation ratio. The average value is increased by 16.04% under a negative deviation ratio compared to the initial micro hardness of the sheet.

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“…Metal spinning processes, including flowing forming, conventional and shear spinning are widely used in manufacturing complex rotationally axis-symmetric and asymmetric products due Music et al (2010) to its process flexibility, low forming load and high product precision, as summarized by Wong et al (2003). In the sheet spinning process, the workpiece rotates with the mandrel while one or more rollers revolving around their own axes move along specific roller paths to form the blank onto the mandrel.…”

Section: Introductionmentioning

confidence: 99%

“…For the features of conventional spinning shown in Fig.1(a), the workpiece stretches in the radial direction and compresses circumferentially aiming to keep the original wall thickness (t 0 ) constant during the whole process. For the features of shear spinning shown in Fig.1(b), the final diameter of the blank (D 1 ) remains constant while the workpiece experiences tensile radial stresses and the final wall thickness (t 1 ) is reduced according to the sine law, t 1 = t 0 × sinα, as outlined by Music et al (2010), where t 0 is the original wall thickness of the blank, α is the inclined angle of the spinning mandrel.…”

Section: Introductionmentioning

confidence: 99%

Uncertainty analysis on process responses of conventional spinning using finite element method

Shi

Long

Zhan

et al. 2014

Struct Multidisc Optim

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A review of the mechanics of metal spinning

Cited by 351 publications

References 49 publications

Influence of Surface-profile and Movement-path of Roller on Thickness Thinning during Multi-pass Deep Drawing Spinning

Influence of Surface-profile and Movement-path of Roller on Thickness Thinning during Multi-pass Deep Drawing Spinning

Mechanism of grain refinement of aluminium alloy in shear spinning under different deviation ratios

Uncertainty analysis on process responses of conventional spinning using finite element method

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