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    Wyświetlanie 1-2 z 2
    Tytuł:
    Conical Picks for Undeground Mining
    Autorzy:
    Bołoz, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2064288.pdf
    Data publikacji:
    2020
    Wydawca:
    STE GROUP
    Tematy:
    conical picks
    durability of tools
    bearing-equipped pick
    bearing-equipped holder
    innovative solutions
    trwałość narzędzi
    innowacyjne rozwiązania
    ostrze stożkowe
    Opis:
    Mechanical cutting in underground mining faces increasingly difficult challenges. Deteriorating working conditions result in the development of automation and robotization, and the insufficient durability of cutting tools remains a serious problem. In addition to drilling, the technology of cutting provides a huge market for tools. Currently, mainly conical picks are used in the process of cutting. The cutterheads of shearers are equipped with at least several dozen conical picks, which, due to their workability and abrasiveness, sometimes work for merely a few hours. Hence the interest of users and manufacturers in the development of tools with increased durability. The article briefly presents the applied solutions of conical picks, their construction, dimensions and materials used. Attention was paid to the issues related to the protection applied and its marking. A review and analysis of commonly known construction solutions for picks and holders have also been carried out, and proprietary patent pending solutions for the pick and holder have been presented.
    Źródło:
    New Trends in Production Engineering; 2020, 3, 1; 221--230
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Directions for increasing conical picks’ durability
    Autorzy:
    Bołoz, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2064384.pdf
    Data publikacji:
    2019
    Wydawca:
    STE GROUP
    Tematy:
    conical picks
    durability of tools
    tool wear rate
    pick equipped with a bearing
    innovative solutions
    noże styczno-obrotowe
    trwałość narzędzi
    szybkość zużycia narzędzi
    nóż łożyskowany
    innowacyjne rozwiązania
    Opis:
    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.
    Źródło:
    New Trends in Production Engineering; 2019, 2, 1; 277--286
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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