Design and technological capabilities of a CNC skew rolling mill

Tomczak, J.; Pater, Z.; Bulzak, Tomasz; Lis, Konrad; Kusiak, Tomasz; Sumorek, A.; Buczaj, M.

doi:10.1007/s43452-021-00205-7

Cited by 20 publications

(8 citation statements)

References 21 publications

(22 reference statements)

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“…The computer numerical control system of this machine makes it possible to form parts with different shapes as a result of sequential motion of the working tools and jaw chuck. The tapered rolls and jaw chuck are moved by electric actuators, and their motion is controlled by a CNC application that allows visualization of changes in the rolling process parameters [12]. Depending on the shape of the preforms or forgings, it is necessary to create a dxf file with the outline of this product.…”

Section: Scope Of Experimentsmentioning

confidence: 99%

Prediction of Waviness Values in Skew Rolling Using Machine Learning Methods

Lis,

Pater,

Tomczak

et al. 2023

Adv. Sci. Technol. Res. J.

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This paper relates to the selection of a machine learning model for predicting the surface waviness of rolled products. An experimental study was carried out using the skew rolling method with three tapered rolls. The products were shaped with variable process parameters. The obtained results were used as a training data set for selected regression models. The random forest model was determined to be the most effective due to the highest value of the coefficient of determination R 2 . The influence of individual process parameters on the waviness value was calculated using the SHAP library.

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Section: Scope Of Experimentsmentioning

confidence: 99%

Prediction of Waviness Values in Skew Rolling Using Machine Learning Methods

Lis,

Pater,

Tomczak

et al. 2023

Adv. Sci. Technol. Res. J.

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“…Rolling tests were performed using a laboratory CNC rolling mill installed at the Lublin University of Technology. This rolling mill, described in detail in [39], was modernised. As a result of modernization, the drive for moving the rolls and chuck was changed from electromechanical to hydraulic.…”

Section: Experimental Trialsmentioning

confidence: 99%

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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“…The obtained rolled piece has high dimensional accuracy, but the material waste is caused by chuck clamping. Tomczak et al [9] carried out mechanical simulation of CNC experimental equipment, and proved that its structural reliability can meet the experimental needs.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study on Axial Feed Skew Rolling of Small-Diameter GH4169 Alloy Bars

Zhang

Wang

Feng

et al. 2023

J. Phys.: Conf. Ser.

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This study relates to an innovative method for forming small-diameter GH4169 superalloy bars by Axial Feed Skew Rolling (AFSR). The finite element (FE) model was established to reveal the deformation characteristics and rolling force parameters of GH4169 superalloy bar in AFSR process. The distribution of stress field reveals that in the deformation area, the stress state in the center of the workpiece is radial compression, axial and tangential tension. In the deformation area, the core temperature of the workpiece rises due to plastic deformation, but after leaving the deformation area, the temperature of workpiece decreases significantly. Therefore, for small-diameter long bars, especially temperature-sensitive materials, auxiliary heating equipment is required when using AFSR technology. Furthermore, the roller with clamping sections was designed, and the rolling experiments were carried out on a double-rotating-arm skew mill. The rolled pieces obtained have no helical grooves on the surface, and the diameter deviations are less than 0.1 mm. The actual rolling process is stable and highly consistent with the FE simulation, which verifies the reliability of the FE model and the feasibility of forming superalloy bars by the AFSR method.

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Design and technological capabilities of a CNC skew rolling mill

Cited by 20 publications

References 21 publications

Prediction of Waviness Values in Skew Rolling Using Machine Learning Methods

Prediction of Waviness Values in Skew Rolling Using Machine Learning Methods

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

Numerical and Experimental Study on Axial Feed Skew Rolling of Small-Diameter GH4169 Alloy Bars

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