An Example of Reparatory Surface Welding of the Mining Machine Vital Part

https://doi.org/10.26552/com.C.2021.1.B39-B45

  • Dušan Arsić
  • Ružica Nikolić
  • Vukić Lazić
  • Srbislav Aleksandrović
  • Ljubica Radović
  • Nada Ilić
  • Branislav Hadzima
Keywords: bucket-wheel excavator, girth gear, tooth fractur, reparatory surface welding, financial gains

Abstract

Mining machines' components, or the whole structure, are prone to frequent premature damages and fractures what is explained either by inadequate design and construction or by insufficient knowledge of the material's and welded joints' properties and oversights in manufacturing. Here is considered the bucket-wheel excavator, i.e. the fracture of the tooth of the girth gear, which enables the circular motion of the excavator's upper structure (which was in operation for 5000 hours). The gear was made of the cast steel GS 40 MnCrSi3 V. The reparatory hard-facing (HF) technology of the fractured tooth required specification of numerous operations including the preparation works. The reparation realized the two-fold savings, in time and money - the new girth gear costs over 500 000 € and its manufacturing lasts 6 to 9 months, while the safety and quality of the repaired tooth was guaranteed.

Author Biographies

Dušan Arsić

Faculty of Engineering, Kragujevac, Serbia

Ružica Nikolić

Research Center, University of Zilina, Zilina, Slovakia

Vukić Lazić

Faculty of Engineering, Kragujevac, Serbia

Srbislav Aleksandrović

Faculty of Engineering, Kragujevac, Serbia

Ljubica Radović

Military Technical Institute, Belgrade, Serbia

Nada Ilić

Military Technical Institute, Belgrade, Serbia

Branislav Hadzima

Research Center, University of Zilina, Zilina, Slovakia

Published
2021-01-04
How to Cite
Dušan Arsić, Ružica Nikolić, Vukić Lazić, Srbislav Aleksandrović, Ljubica Radović, Nada Ilić, & Branislav Hadzima. (2021). An Example of Reparatory Surface Welding of the Mining Machine Vital Part. Communications - Scientific Letters of the University of Zilina, 23(1), B39-B45. https://doi.org/10.26552/com.C.2021.1.B39-B45
Section
Mechanical Engineering in Transport