Mechanism and force-energy parameters of a hollow shaft’s multi-wedge synchrostep cross-wedge rolling

Zheng, Shuhua; Shu, Xuedao; Han, Sutao; Yu, Penghui

doi:10.1007/s12206-019-0411-1

Cited by 22 publications

(10 citation statements)

References 6 publications

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“…require rolls with diameters exceeding 2 m. For this reason the possibility of rolling axles using several pairs of wedges simultaneously was investigated. [12][13][14] Such solution allows the tool to be significantly shorter and used in a rolling mill with the diameter of rolls about 1 500 mm (rolling mills with such rolls are already produced in China). Unfortunately employing the multi-wedge rolling scheme magnified the problem of excessive ovalisation of the cross-section.…”

Section: Conception Of a Three Roll Cross Rolling Process Of Hollow Rmentioning

confidence: 99%

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

et al. 2021

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Section: Conception Of a Three Roll Cross Rolling Process Of Hollow Rmentioning

confidence: 99%

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

et al. 2021

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“…In this method the workpiece is simultaneously deformed by 2 or 3 sets of wedges, which means that the nominal diameter of the tools could be reduced to 1600 mm [1,7]. Results of the rolling tests performed in 1:5 scale by Peng et al [7] and Zheng et al [8] demonstrated that the production of rail car axles by the multi-wedge cross-rolling method is difficult due to significant inaccuracies in product shape and the problem with removing the ovalisation of the cross section of the product (in the case of hollow axles). According to Pater and Tomczak [9], an alternative to multi-wedge cross-rolling is a CWR process that is performed in two operations.…”

Section: Introductionmentioning

confidence: 99%

Forming of rail car axles in a CNC skew rolling mill

Pater

Tomczak

Lis

et al. 2020

Archiv.Civ.Mech.Eng

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This study relates to an innovative method for forming rail car axles by skew rolling in a CNC 3-roll mill. The rolling mill was constructed at the Lublin University of Technology. The use of this machine makes it possible to produce elongated axisymmetric parts that are up to 55 mm in diameter and up to 1000 mm in length. Experimental rolling tests are performed (in 1:5 scale) using this machine. Two types of axles are analysed: one manufactured in accordance with North American standards (AAR Class E) and one manufactured in compliance with European standards (BA302). Diameters of produced axles have a dimensional accuracy of ± 0.4 mm. Produced axles are free from internal cracks, and their surface defects (shallow helical grooves) can easily be removed by machining. The major shortcoming of the proposed method is the presence of chucking allowance. To eliminate this allowance, it is proposed that the forming process should be performed in two operations: rolling extrusion and skew rolling. Results of a numerical analysis were performed using the Simufact.Forming program confirms that rail car axles can be formed by the proposed method.

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“…1600 mm [8,9], which is an implementable size. The experimental tests (1:5 scale models) indicated that the accuracy of the product manufactured using the multiwedge rolling method is unsatisfactory [8,13]. An effective elimination of the ovalization of the cross-section, typical for the two-roll method [1,10,11], poses a significant problem.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Cross-Wedge of a Hollow Rail Axle

Pater¹,

Lis²,

Walczuk-Gągała³

2020

Adv. Sci. Technol. Res. J.

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The article presents an innovative method of manufacturing hollow rail axles using three combined wedge rolls. The proposed solution was evaluated using numerical simulation. Two cases of forming, differing in the wall thickness of the billet, were analysed. The geometry of the formed axles, distributions of the effective strain, temperature and damage function were presented. Moreover, the changes to the forces and torques acting on each roll were presented.

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Mechanism and force-energy parameters of a hollow shaft’s multi-wedge synchrostep cross-wedge rolling

Cited by 22 publications

References 6 publications

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

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

Forming of rail car axles in a CNC skew rolling mill

Numerical Analysis of the Cross-Wedge of a Hollow Rail Axle

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