Numerical and Experimental Study of Producing Two-Step Flanges by Extrusion with a Movable Sleeve

Winiarski, Grzegorz; Gontarz, A.

doi:10.1515/amm-2017-0071

Cited by 12 publications

(9 citation statements)

References 8 publications

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“…The simulations were made in Deform-3D. This software has been effectively used in previous studies to investigate metal forming processes [9][10][11]. The simulations were performed on material models of aluminium alloys obtained from the software's material database.…”

Section: Methodsmentioning

confidence: 99%

Investigation of the Deformability of Aluminium-Copper Casting Alloys

Winiarski¹,

Dziubińska²,

Majerski³

et al. 2018

Adv. Sci. Technol. Res. J.

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The paper presents the results of a numerical analysis and experimental tests investigating the deformability of castings made of two aluminium alloys: EN AW-2017A and EN AW-2024. Test specimens were produced by two casting methods: sand casting and permanent mould casting. The castings were first subjected to homogenizing annealing; afterwards, they were shaped into cylindrical specimens for an upsetting test. This test was conducted on a hydraulic press in the temperature range of 420-500˚C. Visual inspection of the specimens and examination of their microstructure were performed. Hardness of selected specimens was also measured. The study led to determination of the effect of the mould type on the deformability of the castings and the hardness of forgings obtained from these casting. Obtained results also became a basis for determining the forging temperature ranges for casting preforms made of the investigated aluminium alloys.

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Section: Methodsmentioning

confidence: 99%

Investigation of the Deformability of Aluminium-Copper Casting Alloys

Winiarski¹,

Dziubińska²,

Majerski³

et al. 2018

Adv. Sci. Technol. Res. J.

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“…The results demonstrated that such defects primarily result from a sharp decrease in the workpiece temperature. A new twostage extrusion method for producing a flanged part was also presented in [12]. The proposed method is based on the use of a sleeve moving opposite to the direction of the punch to produce a part with a flange of a relatively large diameter and height, when compared to the geometry of the tubular blank.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of a Six Stage Forging Process for Producing Hollow Flanged Parts from Tubular Blanks

Winiarski¹,

Bulzak²,

Wójcik³

et al. 2020

Adv. Sci. Technol. Res. J.

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This paper presents the results of a numerical analysis of a cold forging process for a hollow flanged part. The analysis was performed using Deform 2D/3D. 42CrMo4 steel tubes were used as the billet material, and their material model in the annealed state was described by a constitutive equation. The forming process was performed in six stages with the use of methods such as extrusion with a movable sleeve, open-die extrusion, and upsetting. The objective of the study was to determine whether the proposed forging technique could be used to produce hollow parts with flanges. The determination was made based on the analysis of product geometry quality and process parameters, including the Cockcroft-Latham ductile fracture criterion and forming forces.

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“…In effect, it is possible to form flanges with a relatively big diameter, and thickness decreasing insignificantly with increasing flange diameter. Other flanging methods presented in [7][8][9] involve extrusion with the use of a movable sleeve. In this process, the sleeve is moved in an opposite direction to that of the punch, and the tools create a closed die cavity of an increasing volume.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Analysis of a New Process for Forming Flanges on Hollow Parts

Winiarski¹,

Gontarz²,

Samołyk³

2020

Materials

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The paper presented a new method for forming flanges on hollow parts by incremental radial extrusion. In the classic process of radial extrusion, additional rings were used to limit the free flow of material in the radial direction. The flange was formed progressively, using rings of increasing diameters. The proposed method was verified by numerical analysis and experimental tests. The numerical calculations were performed by the finite element method using the Deform-3D software package. Tubes made of aluminum alloy EN AW 6060 were used as billets. Laboratory tests were carried out using the Instron 1000 HDX testing machine. The objective of the study was to determine the validity of the proposed flange extrusion method. Results demonstrated that the new method made it possible to produce flanges with a relatively large diameter and uniform thickness, confirming the effectiveness of the proposed forming technique.

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Numerical and Experimental Study of Producing Two-Step Flanges by Extrusion with a Movable Sleeve

Cited by 12 publications

References 8 publications

Investigation of the Deformability of Aluminium-Copper Casting Alloys

Investigation of the Deformability of Aluminium-Copper Casting Alloys

Numerical Analysis of a Six Stage Forging Process for Producing Hollow Flanged Parts from Tubular Blanks

Theoretical and Experimental Analysis of a New Process for Forming Flanges on Hollow Parts

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