Study of CNC skew rolling of hollow rail axles with a mandrel

• Autorzy: Bulzak Tomasz , Pater Zbigniew , Tomczak Janusz , Wójcik Łukasz

Identyfikatory

DOI

10.1007/s43452-024-00954-1

• Języki publikacji: EN

Abstrakty

EN

The manuscript presents a new manufacturing technology for the production of hollow railway axle forgings. The manufacturing technology analyzed is based on three-roll skew rolling (TRSR) using a computer numerically controlled (CNC) rolling mill. The study focused on comparing the rolling capability of hollow products without and with a mandrel calibrating the hole of the forging. The influence of tube billet size on the rolling process was also analyzed. FE analysis and experimental studies were carried out. An analysis of the accuracy of the internal hole of the forging depending on the adopted parameters of the rolling process was carried out. Based on numerical simulations, the state of strain and the flow pattern of the material and temperature distribution during rolling were determined. The force parameters of the rolling process of hollow forgings were also analyzed. Based on the research, a two-stage rolling technology for rolling hollow railway axle forgings was proposed. The results obtained indicate the suitability of using a calibrating mandrel to improve hole accuracy in hollow forgings rolled from a tubular billet. The gap c between the bore diameter of the forging and the diameter of the mandrel was measured. Increasing the tubular billet dimensions from Ø42.4 × 10 mm to Ø48.3 × 12.5 mm reduced the gap c by 49.8%. Rolling the billet Ø51 × 14.2 mm in two passes compared to rolling in one pass reduced the gap c by 45.5%.

Słowa kluczowe

EN

hollow axle; railway axle; mandrel; skew rolling

PL

oś kolejowa; trzpień; walcowanie skośne

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2024
• Tom: Vol. 24, no. 3
• Strony: art. no. e145, 2024
• Opis fizyczny: Bibliogr. 35 poz., fot., rys., wykr.

Twórcy

autor

Bulzak Tomasz

• Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland

• https://orcid.org/0000-0002-0525-8321

autor

Pater Zbigniew

• Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland

autor

Tomczak Janusz

• Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland

autor

Wójcik Łukasz

• Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025)