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2019 | vol. 2(1) cz.I Part I: Modern Machines and Technologies for Mining | 277--286
Tytuł artykułu

Directions for Increasing Conical Picks' Durability

Autorzy
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Conical picks are cutting tools used in many branches, in particular in the mining, road construction and building branch. Contact with the excavated face causes their constant wear, which is an unfavorable but unavoidable process. Milling heads of working machines are equipped with several dozen conical picks, and mining in abrasive or hardly accessible rocks can reduce their life to a few hours. It is in the interest of both users and producers to increase their durability, as tools replacement, apart from purchase and logistic costs, results in machine downtimes. In the article various solutions of conical picks, their construction, dimensions and materials used have been discussed. Technical procedures applied to increase the durability of conical picks and their regeneration as well as methods of extending the life of picks working in difficult conditions have been presented. Two author's methods of extending the life of picks working in difficult conditions, covered by a patent application, have also been presented. The first solution involves ensuring an uninterrupted rotational movement of the pick in the holder. Patent claims include an innovative method of equipping the additional sleeve integrated with the holder with a rotational bearing, which enables a continuous rotation of the pick. The tool equipped with a bearing generates much lower movement resistance than the standard mounting. The holder is designed to mount classic commercial picks. What is important, the pick replacement does not require interfering with the bearing assembly. The second solution concerns the manner of protecting the working part of the pick by means of a special element made of an abrasion resisting material. This element is the pick tip, the geometry of which varies from the commonly applied posts made of sintered carbide. In this solution, the tip has a shape corresponding to the form of conical pick's wear, which causes that its steel body does not wear. Moreover, there is a possibility of applying a mobile, rotational mounting of the tip to the body. (original abstract)
Twórcy
  • AGH University of Science and Technology Kraków, Poland
Bibliografia
  • Bołoz Ł, Krauze K. (2018). Ability to mill rocks in open-pit mining. In: 18th International Multidisciplinary Scientific Geoconference, Exploration and Mining, SGEM2018, Albena, Bulgaria, Voulme 2, pp. 41-48.
  • Bołoz Ł. (2018). "Results of a study on the quality of conical picks for public procurement purposes", in Proceedings of the international conference on Human safety in work environment: operating machinery and equipment: Integrated Management Systems: Quality - Environment - Safety, 23-27 october 2018, GdańskNynashamn-Sztokholm-Tallin-Sztokholm-Nynashamn-Gdańsk, pp. 687-693.
  • Chang S., Lee, Chulho, Kang. (2017). Tae-HoEffect of hardfacing on wear reduction of pick cutters under mixed rock conditions. Geomechanics and engineering, 13(1), pp. 141-159.
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  • Gospodarczyk P., Kotwica K., Stopka G. (2013). A new generation mining head with disc tool of complex trajectory, Archives of Mining Sciences, 58(4), pp. 985-1006.
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  • Krauze K., Bołoz Ł., Wydro T. (2015). Parametric factors for the tangential-rotary picks quality assessment, Archives of Mining Sciences, 60(1), pp. 265-281.
  • Nahak, Sakuntala; Dewangan, Saurabh; Chattopadhyaya, Somnath. (2015). Discussion on Wear Phenomena in Cemented Carbide. In: Global Challenges, Policy Framework & Sustainable Development for Mining of Mineral and Fossil Energy Resources. Dhanbad: GCPF, 11, pp. 284-293.
  • Prokopenko S. A., Vorobiev A. V., Lyudmila A., Janocko J. (2018). Waste Cutters Utilization in Underground Coal Mining, Acta Montanistica Slovaca, 23(1), pp. 81- 89.
  • Romanyshyn T., Dzhus A., Romanyshyn L. (2017). Design and research of fishing tools with national parameters of magnetic systems. Eastern-European Journal of Enterprise Technologies, 88(4/5), pp. 17-22.
  • Songyong L., Huifu; J., Xiaohui L. (2017). Experimental research on wear of conical pick interacting with coal-rock. Engineering failure analysis, 74, pp. 172-187.
  • Gajdzik B., Sitko J. (2014). An analysis of the causes of complaints about steel sheets in metallurgical product quality management systems. Metalurgija, 53(1), pp. 135- 138.
  • Gajdzik B., Sitko J. (2016). Steel mill products analysis using qualities methods, Metalurgija, 55(4), pp. 807-810.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.ekon-element-000171590237

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