Stressed State of Elements of Dismountable Drilling Tool with Spherical Cutters: Simulation in Software Environment
Konstantin Anatol’evich Bovin1, Andrey Olegovich Shigin2, Dmitry Yuryevich Kritsky3, Alexander Igorevich Erofeev4, Vitaliy Aleksandrovich Yarkov5, Evgeniy Ilyich Vicelar6

1Konstantin Anatol’evich Bovin*, Siberian Federal University, Krasnoyarsk, Russia.
2Andrey Olegovich Shigin, Siberian Federal University, Krasnoyarsk, Russia.
3 Dmitry Yuryevich Kritsky, Siberian Federal University, Krasnoyarsk, Russia.
4Alexander Igorevich Erofeev, Siberian Federal University, Krasnoyarsk, Russia.
5Vitaliy Aleksandrovich Yarkov, Siberian Federal University, Krasnoyarsk, Russia.
6Evgeniy Ilyich Vicelar, Siberian Federal University, Krasnoyarsk, Russia.

Manuscript received on November 15, 2019. | Revised Manuscript received on 20 November, 2019. | Manuscript published on December 10, 2019. | PP: 3499-3504 | Volume-9 Issue-2, December 2019. | Retrieval Number: B7698129219/2019©BEIESP | DOI: 10.35940/ijitee.B7698.129219
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Abstract: Advance in extraction of mineral resources is one of the most prioritized problems of mining industry in Russia and other countries. Herewith, drilling and blasting operations are the most important mining stages, the relevant expenses reach up to 50% of total mining costs. Drilling tool is the most important and highly loaded element of drilling assembly determining the efficiency of blasthole drilling. Existing designs of drill bits of Russian and foreign manufacturers are nondismountable, that is, are beyond repair or reclaim, especially in field conditions. For instance, in the case of failure of one bearing support, the drill bit fails and is rejected. Despite numerous types of drilling tools, their stressed state has been studied sufficiently only for serially fabricated drill bits. Therefore, it is important to study strength properties of dismountable drilling tools which provide the maximum operation lifetime of the basic parts (body and coupling). Complete information about loads acting on the main elements of drill bits is required to improve designs of dismountable drilling tools. This work analyzes stress and strain state of dismountable drill bits with spherical cutters (RSShD) using finite element models in ANSYS software environment. Predictions are made for the cases of maximum loads exerted by highly efficient drilling rigs on the drill bit and heterogeneous distribution of these loads over elements of the drill bit. Distributions of equivalent stress fields occurring in drill bit body, bearing supports and cutters are presented. Drill bit operability in various operation modes is analyzed. 
Keywords: Blasthole Drilling, Axial load, Drilling Tool, Drill bit, Prediction Model, Stress and Strain State, Equivalent Stress; Yield Strength.
Scope of the Article: Software Engineering Tools and Environments