SU732483A1 - Cutter drill bit - Google Patents

Description

I

The invention relates to the mining industry.

Known tricone chisel bit, comparing to the sections, including the nipple part and the leg, interconnected by means of cylindrical pins installed in the sockets, you-. filled on the mating surfaces of paws Q3.

However, when the bit is mounted, the connection of the sections with cylindrical pins does not provide the necessary assembly accuracy. Therefore, sections are set arbitrarily one relative to the other, which leads to a deviation of the bit diameter from the nominal size, to the difference in paw position levels between themselves, and consequently, to a deviation of a given diameter of the well in the process of taking from the nominal size to and premature .

The purpose of the invention is to improve the accuracy of the bit

The goal is achieved by the fact that one of the sections is provided with two additional dowel-pins with plane-parallel faces, and in the other two sections there are made jacks for additional pins, with the plane-parallel faces of additional pins perpendicular to the line, connecting our centers of cylindrical jacks and additional pins placed on one surface of the section,

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FIG. 1 shows a tricycle drill bit with a partial tear, front view} in FIG. 2 - section A-A of FIG. one; FIGURE 3 - section bb of FIG. 1,

Tricone drill bit Wtleyo

15 sections 1-3, on the surfaces 4 and 5 of section i are made sockets. 6-9, in which cylindrical pins 10 and 11 and additional pins 12 and 13 with plane-parallel faces 14-16 (flat face parallel to the flat face 14 of additional pin 13 are installed, respectively, are not shown in the drawing). At the same time, the rtXTHb 14 n gtalco is parallel to it, flattened by the additional P1ti (|) te 13, and also the flat parallel faces 15 and 16 of the additional pin 12 are perpeptic, respectively; the centers of the sockets 6 and 8 for the cylindrical pin 10 and the additional pin 13, and the line 17 connecting the centers of the sockets 7 and 9 for the cylindrical pin 11 and the additional pin 12. In the sections 2 and 3 of the three-stroke drill bit on the surfaces of the rim; Sided respectively with surface 4 and surface 5 of section 1, sockets 18 and 19 are made for cylindrical pins 1O and 11 and sockets 2O and 21 for additional pins 12 and 13, mounted in section 1 of the bit. The location of the sockets 18, 21 and 19, 20 on the surfaces of sections 2 and 3 corresponds to the location of the sockets 6, 8 and 7, 9, formed on the surfaces 4 and 5 of section 1 of the bit. Gnee and 20 and 21 under the cylindrical additional pins with flat-faceted granite 5№1I performed ccts as the sockets 18 and 19 of cylindrical shape. With this design, the bit sections occupy a well-defined relative position. The paw acquires a complete set of bases, which makes its design more technological. By improving the accuracy of mounting the paws, three machining on an assembly of 1.5-2 brine increases the accuracy of the basic parameters of the bit, which makes it possible to increase the performance of the bit by 1–15%. The actual possibility of automating the assembly of the bit, the claims of the invention, the tricone drill bit, consisting of sections, including a nippel part and a paw, interconnected by means of cylindrical, mounted in slots, mounted on matching surfaces, differing from each other. By the fact that, in order to improve the accuracy of the assembly of the bit, one of the sections is provided with two additional pins with plane-parallel edges, and in the other two sections there are slots for additional fingers you, the plane-parallel faces additional pins per- pevdikul rny line connecting the centers of a cylindrical sockets and additional pins disposed on one surface section. Sources of information taken into account in the examination 1. PA Paliy, et al. Reference book Chisel drill, Moscow, Nedra, 1971, p. 130, fig. 1U. 2 (prototype).

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FIG. g

Claims (1)

Claim ABOUT Three-cone drill bit, consisting of sections including a nipple part and a paw connected to each other by means of cylindrical pins 5 mounted in sockets made on the mating surfaces of the paws, characterized in that, in order to increase the accuracy of assembly of the bit, one of the sections is equipped with two additional pins with plane-parallel faces, and in the other two sections there are sockets for additional pins, moreover, the plane-parallel faces of the additional pins are perpendicular to the line, connecting nesting centers of nests for cylindrical and additional pins placed on one surface of the section.