Numerical Analysis of a Forging Process for Producing a Hollow Ball From Tube

Samołyk, G.

doi:10.12913/22998624/94972

Cited by 5 publications

(19 citation statements)

References 10 publications

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“…A similar forging process was investigated by the authors previously, and the results were presented in [4]. The study investigated the formation of a steel ball from a tube for two variants of the billet wall thickness (g 0 3 mm and 4 mm).…”

Section: Problem Description and Preliminary Analysismentioning

confidence: 98%

“…This group of machine components undoubtedly includes hollow products [1][2][3] that are "empty inside" during and after the forming process. Hollow products can generally be divided into thick-and thin-walled parts [4].…”

Section: Introductionmentioning

confidence: 99%

“…There are numerous effective techniques for manufacturing such products. These include both forging methods [4][5][6] and rotary forming methods, e.g., [1,7,8]. Technological problems arise when forming thin-walled parts [4].…”

Section: Introductionmentioning

confidence: 99%

“…These include both forging methods [4][5][6] and rotary forming methods, e.g., [1,7,8]. Technological problems arise when forming thin-walled parts [4]. The authors suggest dividing thin-walled parts into two groups, depending on whether their wall thickness is lower or greater than 2 mm.…”

Section: Introductionmentioning

confidence: 99%

“…It can be assumed that the choice of a forming technology depends on many factors, in particular the shape and dimensions of the finished part, forming conditions and the possibility of preventing standard failure modes (e.g., excessive thinning of the workpiece wall, cracks, buckling, etc.) [3,4,7,16,17,22]. If the deformation resistance of a material is relatively low, the forming process can be carried out at room temperature.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A cold forging process for producing thin-walled hollow balls from tube using a plastic insert

Samołyk

Winiarski

Gontarz

2020

Int J Adv Manuf Technol

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This paper investigates a cold forging process for producing hollow balls made of an aluminium alloy. The forging with an outside diameter of 30 mm is formed from a tube section with a 2-mm wall thickness. Preliminary tests have shown that in traditional die forging, the use of a billet with such a small relative thickness not only limits the range of applicable geometric parameters but also causes buckling. The authors propose to solve this problem by using an additional tool that has an active effect on the inner surface of the workpiece, and thus makes it possible to control the forging process conditions. The tool is a plastic insert, i.e., an additional flexible core made of a low-melting alloy. Theoretical and experimental results presented in this paper provide a considerable insight into the cold forging process for thin-walled hollow balls. The effects of the plastic insert geometry and dimensions on the forging process are also examined. A solution is proposed to ensure that the forged part meets all requirements.

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Section: Problem Description and Preliminary Analysismentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A cold forging process for producing thin-walled hollow balls from tube using a plastic insert

Samołyk

Winiarski

Gontarz

2020

Int J Adv Manuf Technol

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Analysis of single-operation cold forging of a hollow ball from a tubular billet

Samołyk

Winiarski

2019

Int J Adv Manuf Technol

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The article reports the results of an experimental and theoretical study of a single-stage cold forging process. This process was used to produce hollow balls with an outside diameter of 30 mm, with two central openings. The forgings were made from tubular aluminum alloy billets with wall thicknesses of 3 mm and 4 mm. The other dimensions of the billets (outer diameter and height) were varied, always making sure that the volume of the forging remained constant. The results of the study were discussed with a special focus on forming conditions, quality of the forging, potential limitations of the process, and the impact of billet dimensions (also expressed as non-dimensional slenderness ratios) on the conditions of the forming process.

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Effect of Workpiece Slenderness on the Numerical Flow Lines Distribution in the Cross-Section of a Circular-Symmetric Part Hot Die Forged with a Hammer

Miłek¹

2022

Adv. Sci. Technol. Res. J.

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The paper presents the results of computer simulations of the steam-air hammer driven die forging process of circular-symmetrical forgings at different slenderness values of the billet (range from 1.5 to 2.8). The slenderness of the workpiece is defined as the ratio of the length of the billet to its diameter. The aim of investigations was to analyse the influence of various values of the billet upsetting ratios on the distribution of the flow lines in the longitudinal sections of the forgings. In addition, the material flow velocities were compared, which allowed for the evaluation of the flow kinematics in individual zones of the forgings. The computer simulation was performed using specialized commercial QFORM-2D software based on the finite element method (FEM). A comparative analysis of obtained results allowed for the development of conclusions that may be helpful in the implementation of this process in industrial conditions for similar shapes of steel forgings.

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Numerical Analysis of a Forging Process for Producing a Hollow Ball From Tube

Cited by 5 publications

References 10 publications

A cold forging process for producing thin-walled hollow balls from tube using a plastic insert

A cold forging process for producing thin-walled hollow balls from tube using a plastic insert

Analysis of single-operation cold forging of a hollow ball from a tubular billet

Effect of Workpiece Slenderness on the Numerical Flow Lines Distribution in the Cross-Section of a Circular-Symmetric Part Hot Die Forged with a Hammer

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