The Chosen Aspects of Skew Rolling of Hollow Stepped Shafts

Bartnicki, J.; Xia, Yingxiang; Shu, Xuedao

doi:10.3390/ma14040764

Cited by 6 publications

(3 citation statements)

References 17 publications

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“…The numerical analysis was performed using the Forge ® NxT v.2.0 simulation software for analysis of forming processes for solids. This programme has been widely employed to investigate cross and skew rolling processes [15,[27][28][29][30][31][32], and the numerical results obtained with this software solution were in good agreement with the results of validation experiments.…”

Section: Numerical Analysissupporting

confidence: 62%

Numerical and experimental study on forming preforms in a CNC skew rolling mill

Pater

Tomczak

Bulzak

et al. 2022

Archiv.Civ.Mech.Eng

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This paper relates to a study on the formation of elongated preforms in a CNC skew rolling mill. First, a numerical analysis was performed to investigate forming processes for three different parts: a scraper, a connecting rod, and a hook. The shapes and dimensions of preforms were designed, and rolling and closed-died forging processes for producing these parts were simulated numerically. Distributions of temperature, effective strain and damage function were determined for rolled preforms. Loads and torques in the rolling process were measured. It was found that the forming process of preforms performed in a CNC skew rolling mill was characterized by relatively low force parameters in relation to the dimensions of formed parts. Numerical simulations of the forging process showed that all forged parts had the required shape, which indicates that the preforms were designed correctly. Following the numerical analysis, experiments were performed in which the preforms were rolled under laboratory conditions (in a scale of 1:2). Experimental results demonstrated that the rolled parts had no internal defects (cracks) and were characterized by high dimensional accuracy.

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Section: Numerical Analysissupporting

confidence: 62%

Numerical and experimental study on forming preforms in a CNC skew rolling mill

Pater

Tomczak

Bulzak

et al. 2022

Archiv.Civ.Mech.Eng

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show abstract

“…The simulations were performed using the FEM-based simulation software Simufact.Forming. The software had been used in many previous studies for comparing cross and skew rolling processes [25][26][27][28][29][30][31][32][33][34][35][36], and obtained numerical results showed high agreement with experimental fi ndings. Figure 4 shows the geometrical models of the two analysed CWR processes designed in Simufact.Forming.…”

Section: Scope Of the Analysismentioning

confidence: 86%

A Comparison of Two-Roll and Three-Roll Cross Wedge Rolling Processes

Pater¹

2023

Adv. Sci. Technol. Res. J.

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Cross wedge rolling (CWR) is used for producing stepped axles and shafts as well as die forging preforms. In current industrial practice, CWR conducted with two tools is predominantly used, with the wedges mounted on rolls or flat tool plates. However, CWR can also be performed with the use of three wedge rolls. This paper begins with a review of previous studies on CWR conducted with the use of three rolls. After that, numerical simulations of two-and three-roll CWR processes for the same shaft are described. Obtained numerical results are then used to compare the two processes in terms of material flow kinematics, material temperature, stresses and strains, failure modes, as well as load and energy parameters. Finally, the Conclusions section presents the advantages of threeroll cross wedge rolling, providing a good starting point for further research on this promising forming method.

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“…Pater et al [19][20][21][22] used the finite element simulation and experimental validation to study the Ti6AL4V hollow shaft in trucks and cars, and provided theoretical foundations on long-shaft parts by TRSR. Bartnicki et al [23] designed and built their own TRSR mill machine to form the hollow axle. The feature of this mill enables the precision movement of rolls and clamps by programming in the CNC system.…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution of three-roll skew-rolling formed hollow axles with uniform wall thickness.

Chen

Zhang²,

Bidare³

et al. 2022

Preprint

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The uniform thickness hollow axle is one of the lightest weight axles in the high-speed rail industry. It can effectively reduce unsprung mass and further improve the train speed. Therefore, due to its importance and significance, it is crucial to research and develop the uniform thickness hollow axle. To understand the microstructural evolution during three-roll skew-rolling (TRSR) forming, 30CrMoA alloy steel was used in this study. A constitutive model of 30CrMoA was established by SIMUFACT FORMING finite element software and utilized to simulate the deformation, heat transfer, and microstructure coupling during TRSR. Via analyzing the influence of process parameters on the average grain size, the microstructural evolution of the forming part at each deformation stage is revealed. The result shows that the dynamic recrystallization of the rolled piece produces a fine and uniform grain structure during the forming process. The refinement level is enhanced with the increase of the radial compression; the grain size is gradually increased from the outer surface to the inner surface of the rolled piece. At a higher rolling temperature, it was found the initial grain size and final average grain size were larger compared to the lower temperature. By increasing the axial traction speed, not only can the rolling time be shortened, but also the appearance of coarse grains can be avoided. Therefore, the mechanical properties can be improved.

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The Chosen Aspects of Skew Rolling of Hollow Stepped Shafts

Cited by 6 publications

References 17 publications

Numerical and experimental study on forming preforms in a CNC skew rolling mill

Numerical and experimental study on forming preforms in a CNC skew rolling mill

A Comparison of Two-Roll and Three-Roll Cross Wedge Rolling Processes

Microstructure evolution of three-roll skew-rolling formed hollow axles with uniform wall thickness.

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