Conception of Hollow Axles Forming by Skew Rolling with Moving Mandrel

Pater, Z.; Walczuk-Gągała, Patrycja

doi:10.12913/22998624/139134

Cited by 4 publications

(4 citation statements)

References 18 publications

(19 reference statements)

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“…Cao [21] introduced a new method of manufacturing hollow shafts via Flexible Skew Rolling (FSR), a near-net-shape rolling technology suitable for diversified production without special molds. Pater and Walczuk-G ągała [22] proposed a concept for manufacturing hollow axles using three skewed rolls, an axially moving chuck, and a moving mandrel, with numerical simulation confirming the method's feasibility. Lin [23] described a novel flexible skew rolling (FSR) process for manufacturing large shafts, offering a good combination of flexible production and less loading.…”

Section: Introductionmentioning

confidence: 93%

The Mechanism of Forming Hollow Shafts with Constant Wall Thickness by Three-Roll Skew Rolling

Zhang,

Shu,

Wang

et al. 2024

Metals

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To solve the problem of the long forming process for hollow shafts with constant wall thickness (HSCWT), a new process for forming HSCWT, namely three-roll skew rolling, has been proposed. First, the working principle of the three-roll skew rolling process is presented. Then, the finite element model (FEM) of the three-roll skew rolling HSCWT is established. The strain-stress field and temperature field distribution rules of the three-roll skew rolling HSCWT are analyzed with FEM. The stress-strain field of the rolled piece is distributed uniformly along the axial direction but not uniformly along the radial direction. The variation of the temperature field is related to the axial traction velocity. The greater the axial traction velocity, the smaller the variation of the temperature field. The temperature of rolled pieces varies within 100 °C during rolling. Finally, the three-roll skew rolling experiment of the HSCWT is carried out. The results show that the three-roll skew rolling process can form HSCWT. The temperature field of the three-roll skew rolling HSCWT is evenly distributed. The selection of larger axial traction velocity is conducive to the forming of rolled pieces. The three-roll skew rolling technology has achieved near constant temperature forming of HSCWT.

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Section: Introductionmentioning

confidence: 93%

The Mechanism of Forming Hollow Shafts with Constant Wall Thickness by Three-Roll Skew Rolling

Zhang,

Shu,

Wang

et al. 2024

Metals

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“…The laboratory skew rolling mill consisted of segments [29]. It consisted of a support frame (1), mill stand (2), drive unit (3), power transmission system (4), billet support (5) and finished product support units (6), jaw chuck unit (7), and axial cylinder unit (8). The test stand was equipped with a measuring system and numerical control (9).…”

Section: Test Stand and Experimental Testsmentioning

confidence: 99%

“…All these parts were made of the C45-grade steel. A novel concept was developed by rolling hollow axles on a mandrel to maintain the inside diameter of the rolled part [5]. Rolling processes for solid [6,7] and hollow parts [8] made of nonferrous metal alloys were also simulated.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effect of Skew Rolling Parameters on the Surface Roughness of C60 Steel Products Using ML Methods

Lis

2023

Materials

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This paper presents results from experimental and numerical studies of the skew rolling process used to shape axisymmetric products made of C60-grade steel. An experimental study was carried out to investigate the effect of process parameters described by the forming angle α, the skew angle θ, the reduction ratio δ, and the jaw chuck velocity Vu on the surface roughness Ra of the forgings. Stepped forgings made of C60-grade steel were rolled. Based on numerical calculations, a machine learning regression model was developed that uses process parameters to predict the surface roughness of produced parts. The random forest model was found to be the most effective based on the determined metrics (MAE, RMSE, R2). A more detailed analysis of this model was performed using the SHAP library. The application of ML methods will enable optimization of skew rolling through appropriate selection of process parameters affecting improvement in product quality.

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“…Z. Pater et al of the Lublin University of Technology innovatively manufactured a CNC three-roll skew rolling mill with variable roll spacing [11,12], and obtained the conclusion that three-roll skew rolling can be used to produce variable cross-section shaft parts such as long shaft parts, hollow stepped shafts and crankshaft preforms [13][14][15]. Meanwhile, they conceived a concept of manufacturing a hollow axle using three skewed rolls moving at the same rotating speed, an axially moving chuck and a moving mandrel [16]. The feasibility [17] and the microstructure [18] of the TRSR hollow axle were also systematically studied by 2 of 18 Ningbo University.…”

Section: Introductionmentioning

confidence: 99%

Forming Quality Research on the Variable-Diameter Section of the Hollow Axle in Three-Roll Skew Rolling

et al. 2022

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The hollow axle is the key component of the high-speed train, and the realization of high-quality forming is the key to ensure the safety of train operation. In this paper, the specimen of the variable-diameter section of the hollow axle is taken as the research object, and the generation mechanism of surface spiral mark defects and the formula of spiral mark depth of variable-diameter section in the TRSR (three-roll skew rolling) process with variable roll spacing are explored. The external roundness error and the function C to measure the wall thickness uniformity of the cross-section were taken as the evaluation indexes and the single-factor simulation experiment was established and simulated in the software Simufact.forming16.0 to obtain the influence law of each process parameter on the external roundness error and wall thickness uniformity of the rolled piece. Orthogonal tests were designed and the order and optimal combination of process parameters on the forming quality were obtained by range analysis and ANOVA analysis. The research results provide theoretical guidance for improving the forming quality of the variable-diameter section of the hollow axle in three-roll skew rolling, and promote the transformation of the TRSR process to high performance and accurate forming.

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Conception of Hollow Axles Forming by Skew Rolling with Moving Mandrel

Cited by 4 publications

References 18 publications

The Mechanism of Forming Hollow Shafts with Constant Wall Thickness by Three-Roll Skew Rolling

The Mechanism of Forming Hollow Shafts with Constant Wall Thickness by Three-Roll Skew Rolling

Analysis of the Effect of Skew Rolling Parameters on the Surface Roughness of C60 Steel Products Using ML Methods

Forming Quality Research on the Variable-Diameter Section of the Hollow Axle in Three-Roll Skew Rolling

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