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1 August 2013
Science

ISTU scientists renew drilling tool for mining industry

Young scientists of Research Student Design Association "Electromechanical Systems", based on the subdepartment of mining machines and electromechanical systems at NI ISTU are working on increasing of strength and improving of performance of properties of drilling tool, which is used in the mining industry.

Head of the Student Design Association, Evgeniy Gurkov, said that the main problem of the drilling tool is that it is not possible to disassemble it and repair the problem. ISTU scientists plan to solve this problem and create a competitive model that can be claimed by the mining enterprises of the country.

Work to improve the design of rock cutter drill bit is made in Research Student Design Association "Electromechanical Systems" under the grant of the Academic Council of Irkutsk State Technical University, won in 2012. The grant’s amount is 200 thousand rubles.

"Rock cutter drill bit is widely used for drilling blast holes. This tool can be used for drilling soft and hard rocks. Oil production often uses foreign counterparts, but most of the Russian mining enterprises use domestic tool that has a number of drawbacks. In particular, the rock particles and the abrasion products fall within the design of bearing assembly. Our task was to seal this part of the instrument," said the head of Research Student Design Association.

According to the drawings, made by the members of the design association, two rock cutter drill bits, the design of which is changed, are produced. "We sealed bearing assembly with special bronze intercalation. In the process of experiments we were tested two types of intercalations: sectional intercalation, made of hardened steel and single-part intercalation, made of bronze. Bronze intercalation is a ring, set into the body of bearing assembly. It is based on bronze; the material held a series of procedures, including ultrasound hardening. Laboratory tests have shown that thanks to technological innovation, inner pats of the unit are clean, thereby increasing the maximum time of tool’s operation by half, " emphasizes E. Gurkov.

Work on improving the rock cutter drill bit continues. The researchers face up with the challenge to resolve issues of oil supply for the bearing assembly. In addition, the developers plan to replace the bearing assembly on the sliding surface.

Anastasiya Slepneva
August
2013
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