Upper-bound analysis of the pressure-assisted injection forging of thick-walled tubular components with hollow flanges

Ma, Yanling; Qin, Yi; Balendra, R.

doi:10.1016/j.ijmecsci.2006.05.001

Cited by 11 publications

(6 citation statements)

References 11 publications

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“…Pressure-assisted injection forming (PAIF) [14] is a forming method that is similar to upsetting combined with hydroforming. This technique is dedicated to the fabrication of hollow gear shafts [15].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study on the Effect of Selected Parameters in a New Method of Extrusion with a Movable Sleeve

Winiarski

2022

Materials

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This paper presents a new method for forming hollow flanged products. The method involves extrusion with the use of a sleeve moving in the opposite direction to that of the punch. A tube with a constant hole diameter and two different outside diameters, made of aluminum alloy EN AW 6060 was used as a material. Numerical calculations were performed using Deform 2D/3D. Experiments were conducted on the PYE 160SS hydraulic press equipped with a specially designed device in which the punch is driven by the press slide while the moveable sleeve is driven by two hydraulic servomotors. Both numerical simulations and experiments were conducted under cold forming conditions. The aim of this study was to determine the effect of selected parameters (flange diameter, height of the cavity in the moveable sleeve, and the chamfer angle between the regions with different outside diameters on the workpiece and in the moveable sleeve cavity) on the stability of the extrusion process. Results were then used to undertake detailed comparative analyses of underfill, flange heights, and flange flank inclination angles. Findings of the analyses served as a basis for drawing conclusions regarding the effect of the analyzed parameters on the investigated extrusion process.

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Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study on the Effect of Selected Parameters in a New Method of Extrusion with a Movable Sleeve

Winiarski

2022

Materials

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“…In the case of hollow parts, the formation of a hole can be supported by the use of a mandrel or a medium e.g. fluid or elastomer [8][9][10]. Fluids are also used in hydroforming [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Cold forging of a hollow flanged part by an unconventional extrusion method

Winiarski

Bulzak

Wójcik

et al. 2021

J. Phys.: Conf. Ser.

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This paper presents a numerical analysis of a new cold forming process for a hollow part with an external flange. The following techniques were used: forward extrusion, an unconventional method of extrusion with a moving sleeve, and upsetting in a tapered die cavity. The billet (42CrMo4 steel tube) was formed at ambient temperature. The study aimed to investigate the proposed method in terms of forged part accuracy. The following are examined and discussed: material flow, process force parameters in relation to tool strength, energy consumption of individual operations, as well as the distributions of strains, stresses, temperature and Cockcroft-Latham integrals in the produced part. The study has confirmed that hollow forged parts with external flanges of relatively large diameters and heights can be cold formed in several operations using different techniques.

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“…The unique characteristics emanating from forging and hydroforming processes, make this hybrid process ideal for manufacturing of thick walled tubular components. In the last decade, extensive research work on a similar variant of hydroforging process was carried out at the University of Strathclyde in the UK [9,10,11,12,13,14,15,16]. The process was referred to as injection forging.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Investigation of the Process Capabilities of Hydroforging

Alzahrani

Ngaile

2016

Materials

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Hydroforging is a hybrid forming operation whereby a thick tube is formed to a desired geometry by combining forging and hydroforming principles. Through this process hollow structures with high strength-to-weight ratio can be produced for applications in power transmission systems and other structural components that demands high strength-to-weight ratio. In this process, a thick tube is deformed by pressurized fluid contained within the tube using a multi-purpose punch assembly, which is also used to feed tube material into the die cavity. Fluid pressure inside the thick tube is developed by volume change governed by the movement of the punch assembly. In contrast to the conventional tube hydroforming (THF), the hydroforging process presented in this study does not require external supply of pressurized fluid to the deforming tube. To investigate the capability of hydroforging process, an experimental setup was developed and used to hydroforge various geometries. These geometries included hollow flanged vessels, hexagonal flanged parts, and hollow bevel and spur gears.

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Upper-bound analysis of the pressure-assisted injection forging of thick-walled tubular components with hollow flanges

Cited by 11 publications

References 11 publications

Theoretical and Experimental Study on the Effect of Selected Parameters in a New Method of Extrusion with a Movable Sleeve

Theoretical and Experimental Study on the Effect of Selected Parameters in a New Method of Extrusion with a Movable Sleeve

Cold forging of a hollow flanged part by an unconventional extrusion method

Preliminary Investigation of the Process Capabilities of Hydroforging

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