SU1474259A2 - Cutting tool for mining machines - Google Patents

Abstract

The invention relates to the mining industry, namely to cutters for mining machines. The goal is to increase the efficiency of rock destruction by forcing the tool to rotate. The device includes a holder 1 and a working head 2 with an inner longitudinal hole 5. On the head 2 there are radial channels 6 and an annular groove in which peaks 8 are mounted flush with its surface. The free ends of the peaks 8 are directed in opposite directions and tangentially to the circumference grooves. Fluid under pressure through the hole 5 and the channels 6 is fed to the visor 8. In this case, by the active forces of the 8 jets flying out from under the visors, the cutter rotates and self-sharpens. 3 il.

Description

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The invention relates to the mining industry, namely to the cutters for mining machines, and is an improvement of the invention according to the author. St. No. 1010266.

The purpose of the invention is to increase the efficiency of rock destruction due to the forced rotation of the tool.

FIG. 1 shows a cutter, a longitudinal section; in fig. 2 is a view A of FIG. one; in fig. 3 shows a section BB in FIG. 2

The cutter for mining machines contains a holder 1, a working head 2 with an annular groove 3 and a carbide insert 4, an internal longitudinal hole 5 with radial water supply channels 6, each of which ends with a mouth 7. The visor with its end is fixed on the working head, with the free end of the visor 8 forms the mouth 9. The free ends of the visors are turned in opposite directions along the tangents to the circumference of the groove.

The cutter for mining machines works as follows.

In the process of destruction, the fluid is supplied under pressure through the longitudinal hole 5, passes through the radial channels 6,

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FIG. 2

five

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enters through the mouth 7 to the visor 8 and is ejected from the mouth 9 the visor 8 in the form of directed jets 10 so that the torques from the reactive forces of all the jets are summed up. The reaction forces of the outgoing jets 10 perceive the visors 8, which transfer these forces to the working head 2 of the cutters. The cutter under the action of reactive forces rotates, self-sharpening.

Claims (1)

Invention Formula Cutter for mining machines on ed. St. No. 1010266, characterized in that, in order to increase the effectiveness of rock destruction due to forced rotation of the cutter, it is provided with visors located in the annular groove flush with the surface of the working cutter head, one ends of which are fixed on the working head, and the free ends of each visor are directed opposite sides are tangential to the circumference of the annular groove, with the visors placed over the mouths of the water-supply radial channels. bv FIG.