SU1439231A1 - Drilling method - Google Patents

Abstract

The invention relates to the mining industry, in particular to methods of percussion drilling of bore-holes and boreholes in hard rocks. The purpose of the invention is to increase the efficiency of destruction of the bottom by increasing the efficiency of energy transfer to the treated surface while reducing the degree of tool wear by reducing the likelihood of overgrinding of the products of destruction. To strike only the surface untreated by the cutter, the shock load is applied in periodic batches. The angle of axial rotation is reduced after the first and second series of shock loads. In this case, n / 2-1 shock loads in series are carried out with a rotation angle between the shock loads equal to 2 semiconductors, the first and second angles of axial rotation of the tool between the series are chosen equal to PT / n and tT / n, respectively, where - an even number of shock loads per one tool turn and p 7/4. If in one revolution of the instrument six strokes are struck, then the first four strokes are through-. blow through the BO, then the instrument is turned to ANGLE 90 ° & and two strokes are applied with a rotation angle between them of 60. Then, the tool is rotated through an angle of 30. & and deliver the next series of beats with a rotation angle between beats 60. 2 Il. (fi (L

Description

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The invention relates to the mining industry, in particular, to methods of percussion rotary drilling of boreholes and boreholes in strong rocks.

The aim of the invention is to increase the efficiency of destruction at the expense of increasing the efficiency of energy transfer to the treated surface while reducing the degree of tool wear by reducing the likelihood of crushing of the products of destruction.

Figure 1 shows a device for carrying out the method; figure 2 - scan the toothed surface (Cams) of the anvil.

The essence of the drilling method is to strike only the surface of the slab untreated with an incisor. To do this, the instrument is turned at different angles of rotation in one turn; The first p / 2 - 1 in the first series of shock loads are performed with the jjpBopOTa angle after each 2Т / П (ЗБО / n) impact, the subsequent impact load is started after turning through the angle 31 // П and п / 2 - 1 impacts again at the angle between the beats, and then turn the tool through an angle of 1G / n and perform a similar series of blows of the second tool turn.

The device for carrying out the method includes a body i in which the hammer 2 is placed, freely seated through its hole 3 on the spins.

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five

Length (circumference) of the cams

6 anvils 5 are made variable: the first p72 - 1 cams 6 are of such length that the angle of their constituent sector is equal, the next cam 6 through, the subsequent p / 2 - I cams 6 through 360 ° / p and the last cam 6 through.

It is possible to perform anvil 5 with one cam, and drummer 2 with cams 6 of variable length.

After switching on the drive (not shown), the rotation of the shaft 11 is transmitted by the key 9 by the spindle 4, the interaction of the I cams 6 of the anvil 5 of which with the cam 8 of the hammer 2 leads to the periodic retraction of the hammer 2 away from the anvil 5, the compression of the spring

7 and his subsequent blows on the anvil 5.

In general, during drilling, a rotary percussion movement of the drill 15 is performed.

When n is the number of strokes per revolution after the first n / 2 - 1 strokes and the rotation of the tool at an angle of 540 ° / n, the plate 16 starts to strike the sectors of the material to be destroyed between the tracks of previous shocks. Then the tool is turned at an angle, and the process is repeated.

The destruction process does not change if you start drilling not from the first cam 6, but from any one on which the cam 8 of the striker 2 is located at the time of switching on the drive.

If, for example, in one revolution

4. In the housing 1, there is a tool nose 40 — strikes are applied.

n 5, to the cams 6 (the toothed surface) of which is spring-loaded by the spring 7 the hammer 2 with the cam 8. The spindle 4 in the upper part has a key 9 placed in the longitudinal groove 10 at the water shaft P. The spindle 4 is placed in the hole 12 of the drive shaft 11 with the possibility of limited axial

displacement, and in the lower part, the spindle 4 has a threaded hole 13, in which the threaded shank 14 of the drill 15 is placed with a cutting carbide blade 16, forming a bit-like weapon. In the drummer 2 there is a longitudinal groove 17, in which the head 18 of the screw-a-limiter 19 is placed, which prevents the drummer 2 from turning against the body 1.

that

equal to 60

the first four strokes alternate through 60 °, then the instrument is turned through an angle of 90 and two strokes are applied with a rotation angle between them, also

° Then turn the tool through an angle of 30 and apply the next series of strokes with an angle of rotation

equal to 60

60 between beats.

Formula of invention

Drilling method, including the application of axial and shock loads to the working tool during its axial rotation, is characterized in that, in order to increase the efficiency of the slaughter by increasing the efficiency of energy transfer to the treated surface while reducing the likelihood of de-grinding of destructive products, the impact This load is applied by a periodic series, and the angle of rotation of the turn decreases after the first and second series of shock loads, while n / 2 - 1 shock loads in sec "

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FIG. 2

DU shock loads 2 i7 / r, and the first and second angles of the axial rotation of the tool between the series - w is equal to 3 f / n n 1i / n, respectively, and n is the even number of shock loads per tool turn and n 7/4.

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Claims (1)

Claim The drilling method, including the application of axial and impact loads on the working tool during its axial rotation, characterized in that, in order to increase the efficiency of fracture of the face by increasing the energy transfer efficiency of the treated surface while reducing the degree of wear of the tool by reducing the likelihood of overgrinding fracture products , the shock load is applied in periodic series, and the angle of axial rotation decreases after the first and second series of shock loads, with n / 2 - 1 shock loads in the series are carried out with an angle of rotation between impact loads of 27G / p, and the first and second angles of axial rotation of the tool between the series are chosen equal to 31G / p and 1Ϊ / p, respectively, with η being an even number of impact loads per tool revolution and η 7 / 4 . FIG. 1 FIG. 2