Effects of backward path parameters on formability in conventional spinning of aluminum hemispherical parts

Gan, Tian; Yu, Zhongqi; Zhao, Yixi; Evsyukov, Sergey; Lai, Xinmin

doi:10.1016/s1003-6326(18)64666-7

Cited by 17 publications

(4 citation statements)

References 13 publications

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“…Cup wall thinning is not considerably affected by the number of passes. This can be attributed to the large range of passes used (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20). However, thinning tends to be smaller at a large number of passes.…”

Section: Resultsmentioning

confidence: 88%

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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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Section: Resultsmentioning

confidence: 88%

“…Till now, the geometrical and surface tolerances database in spinning processes has been either not found or mainly based on expert knowledge [11]. To the best of our knowledge, factors affecting roundness, cylindricity, springback, and product height have not been fully investigated.…”

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

View full text Add to dashboard Cite

show abstract

“…4,5 Spinning technology, which is an important part in plastic processing fields, is widely used in the forming process of conical thin-walled shell parts. 6–9…”

Section: Introductionmentioning

confidence: 99%

Finite element simulation of the one-pass inner spinning process of curved generatrix cone cylindrical parts and analysis of their microstructure

Hao

Luo

Jin

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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A one-pass annealing–internal spinning is proposed to form a conical thin-walled shell with large curved generatrix. The structure of the blank used is designed based on product-size requirements. ABAQUS finite element software is used to simulate the internal spinning process of a conical thin-walled shell with large curved generatrix under small-end (process 1) and large-end (process 2) rotations. The microstructure of the products is subsequently analyzed. Results show that the spinning pressure of the skin part under process 1 is relatively stable, and that the strain and residual stress distribution are uniform, and the hardness and the mechanical performance is improved. The products of the two processes have an obvious circumferential fiber structure. The second phase grain size in the fracture morphology of the product formed under the process 1 is uniform, and its size is in the range of 2–6 µm. Whereas, the second phase distribution of the product formed under the process 2 is not uniform, the fine second phase grain size is in 1–2 µm, and the coarse second phase grain size is in 5–8 µm.

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“…The validity of the FEM model was evaluated by comparing the height and thickness distributions of the workpiece, formed experimentally, with the results calculated by FEM [3][4][5][6]. For designs wherein the workpiece configuration was estimated by FEM, Metals 2020, 10, 793 2 of 10 the height and thickness of the workpiece, obtained due to the roller path, were evaluated [7][8][9][10][11]. Recently, stress distribution in workpieces was reported [12].…”

Section: Introductionmentioning

confidence: 99%

Texture Evolution of a Rolled Aluminum Sheet in Multi-Pass Conventional Spinning

Gondo

Arai

Kajino

et al. 2020

Metals

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This study clarified the evolution of texture in the thickness direction of the cylindrical cup which was spun from a rolled aluminum sheet in 13 passes, using electron backscatter diffraction pattern analysis. The study also obtained the relationship between the strain and layer structure, characterized by the textures. The spun workpiece had three layers in the thickness direction. The layer structure was composed of four types of textures: the Cu texture, “texture-I”, which rotated 20° around <111> from the Cu texture; “texture-II”, which rotated 5° around its <110> from the Cu texture; and “texture-III”, which rotated 10° around its <001> from texture-I. When a blank disk had the sandwich-type layer structure Cu-I-Cu in its thickness direction, the structure changed to the Cu-II-II and Cu-III-III layer structures for the negative and positive thickness directional strains, respectively. A complex-type structure was found in the transition from Cu-I-Cu to Cu-II-II and Cu-III-III.

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Effects of backward path parameters on formability in conventional spinning of aluminum hemispherical parts

Cited by 17 publications

References 13 publications

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

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

Finite element simulation of the one-pass inner spinning process of curved generatrix cone cylindrical parts and analysis of their microstructure

Texture Evolution of a Rolled Aluminum Sheet in Multi-Pass Conventional Spinning

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