Production of Hollow Railroad Axles by Screw Piercing and Radial Forging

Романенко, В. Д.; Степанов, П. П.; Kriskovich, S. M.

doi:10.1007/s11015-018-0579-0

Cited by 22 publications

(8 citation statements)

References 1 publication

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“…Aby zmniejszyć masę osi kolejowych, próbuje się zastępować osie pełne ich drążonymi odpowiednikami. Takie elementy można wytwarzać, łącząc procesy dziurowania w walcarce skośnej oraz kucia na kowarkach [3]. Inną analizowaną techniką wytwarzania drążonych osi kolejowych jest walcowanie poprzeczno-klinowe (WPK) dwoma walcami [4][5][6].…”

Section: Wprowadzenieunclassified

Numerical analysis of the cross rolling process of a hollow railway axle

Pater¹

2020

Mechanik

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Section: Wprowadzenieunclassified

Numerical analysis of the cross rolling process of a hollow railway axle

Pater¹

2020

Mechanik

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“…Currently hollow rail axles are manufactured in the joint process of piercing sleeves in a skew rolling mill and forging in swaging machines. 3) Many research facilities seek new, highly efficient methods of manufacturing hollow rail axles. Rolling appears to be particularly auspicious.…”

Section: Introductionmentioning

confidence: 99%

Conception of a Three Roll Cross Rolling Process of Hollow Rail Axles

et al. 2021

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“…Large shafts play an important role in large-elongated axial parts manufacturing and die-forging billets preforming, which are widely used on transportation vehicle, aerospace, construction machinery and other indutrial clusters, such as railway axles [1,2], truck shafts [3], preform of turbine blade [4] and railway switch [5]. Up to now, these shafts are generally formed by forging process (open die forging [6,7], radial forging [8,9,10]) and cross-wedge rolling (CWR) process [1,11,12]. Nevertheless, the forging process can manufacture various shafts by common rollers but needs a high forging force on account of its characteristic of overall deformation, which results in the heavy tonnage of forging equipment.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing large shafts by a novel flexible skew rolling process

Lin

Wang

Zhou

et al. 2021

Int J Adv Manuf Technol

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When manufacturing large shafts with multi-specification and small-batch production, both the conventional forging and rolling process bring a high tooling cost due to heavy forging press or large-size specialized roller. In this study, a novel flexible skew rolling (FSR) process is proposed by adding degrees of freedom to the rollers as compared to the typical skew rolling process. Since each of the FSR rollers has three 34 degrees of freedom (circle rotating, radial rotating and radial feeding), the FSR process 35 can be divided into four stages: radial rolling, rollers inclining, skew rolling and rollers 36 levelling. Therefore, the FSR process can produce various shafts with same rollers via programming different movements. To verify the feasibility of FSR process, a physical investigation corresponding with a numerical simulation for a single-step shaft is undertaken with a Φ80×390 mm C45 steel billet. According to the results from physical experiments and numerical simulations, the FSR formed shaft has a maximum deviation of 0.99 mm, and its microstructure and properties have been improved obviously. Moreover, although there is a tendency of center crack in FSR products as predicted by numerical results, both the transverse and longitudinal section of the physical shaft are free from central cracking. The major forming defects existed on the rolled shaft are knurled pockmarks, surface threads and side cavity, which are the typical defects of the conventional skew rolling and cross-wedge rolling and can be removed by machining. To the authors' knowledge, this novel process has a good combination of flexible production and less loading, which will be of great engineering significance to reduce the tooling cost in large shafts manufacturing.

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Production of Hollow Railroad Axles by Screw Piercing and Radial Forging

Cited by 22 publications

References 1 publication

Numerical analysis of the cross rolling process of a hollow railway axle

Numerical analysis of the cross rolling process of a hollow railway axle

Conception of a Three Roll Cross Rolling Process of Hollow Rail Axles

Manufacturing large shafts by a novel flexible skew rolling process

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