Method for strength calculating of structural elements of mobile machines for flash butt welding of rails

Authors

  • Andriy Valeriy Moltasov E.O. Paton Electric Welding Institute of the National Academy of Science of Ukraine, Ukraine
  • Pavlo Mykolay Tkach E.O. Paton Electric Welding Institute of the National Academy of Science of Ukraine, Ukraine
  • Krzysztof Krasnowski Institute of Welding, Poland

DOI:

https://doi.org/10.20535/2521-1943.2017.81.114528

Keywords:

flash butt welding of rails, rail welding machine, central axis insulation, upset force, strength calculation technique, bending, crushing

Abstract

Purpose. The subject of this study is the strength of the loaded units of mobile machines for flash butt welding by refining high-strength rails. The theme of the work is related to the development of a technique for strength calculating of the insulation of the central axis of these machines. The aim of the paper is to establish the mathematical dependence of the pressure on the insulation on the magnitude of deflections of the central axis under the action of the upset force. Design/methodology/approach. Using the Mohr’s method, the displacements of the investigated sections of the central axis under the action of the upset force and the equivalent load distributed along the length of the insulation were calculated. The magnitude of the load distributed along the length of the insulation equivalent to the draft force was determined from the condition that the displacements of the same cross sections are equal under the action of this load and under the action of the upset force. Results. An analytical expression for establishing the relationship between the pressure acting on the insulation and the magnitude of the upset force and the geometric dimensions of the structural elements of the machine was obtained. Based on the condition of the strength of the insulation for crushing, an analytical expression for establishing the relationship between the length of insulation and the size of the upset force, the geometric dimensions of the structural elements of the machine, and the physical and mechanical properties of the insulation material was obtained. Originality/cost. The proposed methodology was tested in the calculation and design of the K1045 mobile rail welding machine, 4 of which is currently successfully used in the USA for welding rails in hard-to-reach places.

Author Biographies

Andriy Valeriy Moltasov, E.O. Paton Electric Welding Institute of the National Academy of Science of Ukraine

Senior research associate of department of welded structures integrity

Pavlo Mykolay Tkach, E.O. Paton Electric Welding Institute of the National Academy of Science of Ukraine

Senior research associate of department of welded structures integrity

Krzysztof Krasnowski, Institute of Welding

Department of weldability and welded structures research

References

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Published

2017-12-29

How to Cite

[1]
A. V. Moltasov, P. M. Tkach, and K. Krasnowski, “Method for strength calculating of structural elements of mobile machines for flash butt welding of rails”, Mech. Adv. Technol., no. 3(81), pp. 5–9, Dec. 2017.

Issue

Section

Original study