SU471434A1 - Device for drilling holes - Google Patents

Description

(54) DEVICE FOR DRILLING BORES

one

The invention relates to the mining industry.

A device for drilling holes is known, which includes a node mechanism, a guide, a drill rod, and a vibration hammer connected to a low-frequency power source with a housing, a winding, a spring-loaded electromagnet core, and a striker.

The proposed device is characterized in that it is equipped with a magnetostrictive vibrator connected to a high-frequency power source, and an acoustic transformer interacting with the feed mechanism, the vibrator being placed in the core of the vibro-impactor, and the transformer located between the die and the drill rod.

This embodiment increases the energy of impact.

The drawing shows the proposed device.

It consists of a guide 1, a feed mechanism 2, an electric shock hammer comprising an electromagnet case 3, a winding 4 electromagnet, a measles 5 electromagnet, springs 6 interacting with a bark 5, and a magnetostrictive vibrator 7.

The vibrator 7 through the hammer 8 8 interacts with an acoustic transformer 9, which is a massive cylindrical body with an outer protrusion 10. The transformer 9 is pressed against the drill shank 11 by an axial force generated by the feed mechanism through the pressing flange with cams 12. The acoustic transformer is designed to transfer the energy accumulated in a magnetostrictive vibrator, drill rod and rock-breaking tool.

The drill rod is rotated by the rotator 13. The winding 4 is connected to the low-frequency power source 14 via

half-wave rectifier 15. The magnetostriction vibrator is connected to the high-frequency power source 16 via a half-wave rectifier 17. The device operates with the contact 18 closed.

When contact 18 is triggered, a current begins to pass through the winding of the vibrator 7 from source 16 at a frequency equal to the natural vibration frequency of the magnetostrictive oscillator.

vibrator. In this case, the vibrator begins to oscillate intensively. At the same time, a pulse current passes through the winding 4 of the electromagnet from the source 14, the frequency of which is 25-50 times lower than the frequency of the current feeding the magnetostrictive vibrator.

With the passage of a current pulse, the measles 5, moving, compresses the spring 6. In this case, the striker 8 moves away from the acoustic transformer and the vibrator begins to oscillate freely without returning energy to the external environment. After the passage of the current pulse through the electromagnet winding, the spring returns the measles to its original position. At this point, oscillations are established in the magnetostrictive vibrator with energy sufficient to effectively destroy the slab when all its stock is recovered in one stroke. The energy is transmitted from the magnetostrictive vibrator due to the impact of the latter on the acoustic transformer.

through which energy is transmitted to the shank of the drill rod.

Subject invention

A device for drilling holes, which includes a feed mechanism, guides, a drill rod, and a vibration hammer with a housing, a winding, a spring-loaded bark connected to a low-frequency power source

electromagnet and striker, characterized in that, in order to increase the impact energy, it is equipped with a magnetostrictive vibrator connected to a high-frequency power source, and an acoustic transformer interacting with the feed mechanism, the vibrator being placed in the vibratory impactor core, and the transformer is located between the striker and the drill rod .