Minimization of sheet thickness variation and other defects of mini drawn parts using a blank holder plate made from concentric rings

Brabie, Gheorghe; Chirita, Bogdan; Albut, Aurelian

doi:10.1016/j.precisioneng.2015.03.011

Cited by 10 publications

(5 citation statements)

References 18 publications

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“…Wall thickness variation is a major defect found in parts made from sheet metals that influences the intensity of part defects and may cause part failure [7]. The wall thickness of the formed part in conventional spinning is, in general, considered to be nearly constant [8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effect of Process Parameters on Part Wall Thickness Variation in Conventional Metal Spinning of Cr-Mn Austenitic Stainless Steels

Sugar

Šugárová

Petrovič³

2016

SV-JME

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Section: Introductionmentioning

confidence: 99%

Analysis of the Effect of Process Parameters on Part Wall Thickness Variation in Conventional Metal Spinning of Cr-Mn Austenitic Stainless Steels

Sugar

Šugárová

Petrovič³

2016

SV-JME

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“…Choubey et al [17] presented the pressure variation effect of blank holder on a ductile material in drawing process, experimental and numerical comparative tests were performed to investigate the material formability at failure. Also, Brabie et al [18] suggested an investigation to minimize the thickness variation of the drawn part; the obtained results confirmed that the variation of thickness can cause cracks. Tria and Trebinski [19] analyzed, by numerical simulations, the failure case of high strength steel, the fracture models were evaluated to define an appropriate failure criterion.…”

Section: Introductionmentioning

confidence: 72%

Pressure and Friction Effects on the Mechanical Behaviour of a Ductile Material during Deep Drawing

Ghennai

Boussaid

Bendjama

et al. 2019

JERA

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The aim of this work is to study the plastic instabilities occurring on the stamped sheets during deep drawing process. The analysis of the plastic deformation of the material showed that the deformation occurs in bi-axial extension at the bottom of the punch due to thinning of the sheet, in local necking together at the vertical wall level of the sheet and below the blank holder due to thickening of the sheet. As a first step, an experimental characterization of the material is undertaken, whose experimental tests made it possible to determine the fundamental characteristics of the material. In the second step, a study of the material behaviour during forming process by numerical simulation using Abaqus finite element code is proposed. The various simulations undertaken showed the variation of the two parameters; the blank holder force and the friction effect. The blank holder force and friction, applied respectively to the blank flange region and between the tool-blank surfaces, make it possible to optimize the deformation limits and to repel any instability which may appear on the material in deep drawing. The simulations carried out on Abaqus code allow to visualize the material behaviour during deformation, by locating the thinning and necking zones on the sheet and from there, in order to locate areas at risk of failure. An optimization of the process is proposed by varying the considered parameters in a validated numerical model. Satisfactory results have been obtained which clearly show the failure and the safe zones.

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“…Optimal control of the value of the holding force and a method of applying it is required to improve the quality of stampings and allows to increase the degree of sheet deformation during stamping. Modern developments in the design of presses used for sheet metal pressing is associated with the improvement of traditional methods of sheet forming by using flexible clamps with a computer-based pressure control system but also using segment holders [19,20]. The use of the so-called pulsating blankholder (the pressure takes place sequentially with the appropriate amplitude) allows one to increase the drawing coefficient, which, in turn, allows for the stamping of products made from materials with reduced plasticity [21].…”

Section: Discussionmentioning

confidence: 99%

Case Study on the Influence of Forming Parameters on Complex Shape Part Deformation

Bałon¹,

Kiełbasa²,

Kowalski³

et al. 2022

Adv. Sci. Technol. Res. J.

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Drawing operations are commonly used to shape metallic thin-walled products for variety of industries -automotive, aerospace, household appliances etc. The basic indicator characterizing cold drawing process is possibility to decrease weight of a product, while at the same time increasing its stiff ness in comparison to other conventional manufacturing technologies such as casting, forging or machining. In this research authors presented results of a numerical study on the infl uence of parameters such as blankholder pressure, forming force, tooling shape and part shape design on the success in manufacturing a part of complicated shape designed as an element of a phase change material heat accumulator. The subject of wrinkling (fi rst and second degree of buckling) was discussed, and the research presented the manufacturing process design which allowed manufacturing discussed drawpiece without defects and within dimensional tolerances. The paper analyzes the phenomenon of drawpiece folding during the forming process for various groups of materials. Experimental research was carried out on a prototype tool for stainless steel (X5CrNi18-10), aluminum alloy (AW-5754) and copper alloy (CW024A).

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Minimization of sheet thickness variation and other defects of mini drawn parts using a blank holder plate made from concentric rings

Cited by 10 publications

References 18 publications

Analysis of the Effect of Process Parameters on Part Wall Thickness Variation in Conventional Metal Spinning of Cr-Mn Austenitic Stainless Steels

Analysis of the Effect of Process Parameters on Part Wall Thickness Variation in Conventional Metal Spinning of Cr-Mn Austenitic Stainless Steels

Pressure and Friction Effects on the Mechanical Behaviour of a Ductile Material during Deep Drawing

Case Study on the Influence of Forming Parameters on Complex Shape Part Deformation

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