SU530941A1 - Drilling crown - Google Patents

Description

one

The invention relates to a rock-breaking tool, namely drill bits.

Known drilling crusts are located from the coronal ring L secid. —And tsal ;;: located on the workplace;:; lh rac-1o;;: ,,; - x from each other and slm-symmetrically sighed ::. - but the other incisors; sh. 11.

The disadvantage of this koroikm RL ---; TC irregular release of cutters out of order. This is explained by the fact that the armament of each concentric row of incisors with the specified Kopoi.Ke is unique. L then ho. Zoemi kz; it is so hard that the bore is ju- and Kep: iOGupd3) the incisors)) gs ::. Gay and a: -; ah; g; x /; ::. :: .. uh, ix ycjiOiiHK; . Osiopi -,;,,: v Obra: / -):.;: -;; l: v -;,. ,, poo,; -.-; - m. -. y-y ..-: -,: -...

yes, when OC irij -: - Mch-;, 9; b; OViO; .ch CH; r.

The most blunt; ool yz known iio cioia - exiiKHcCivib u ... and st; -; ;; .uoc; -. ixv ,, iOivi

core, to pkvazhi-1: image of s.i1nh P0 :: scots 12. In this crown, for calibration of the borehole and core, amplification of carbide plates with main cutters is used, which increases the effect of: :: se.

However, this crown also has relatively low penetration rates and mechanical :: drilling speed 1K :: .- for frequent breakdowns of the main incisors. The latter is explained by the fact that pa, dial forces acting on two common inserts, are perceived by the basics;

 :, O -: ..: L :. rststsop from breakdowns. ::: .- :: - 1; ah, - ccTViraoTCH by the fact that

 ivxjjт rpa} 4i is extreme: x of the main types are mixed with respect to the corresponding rpaneii of the union; к ;; 11О- and core-forming

: ZTsOl II side of a SPECIAL LINE OF THE ROAD KOROijnoiO number; rJi.AibJKaiov to the priest.dnymi gran m well S .O.LIH incisors.

The incisors D of the vertical plane can be installed stepwise, while the contours formed by lines passing through the cutting edges of the borehole and core-forming incisors embrace the corresponding contours of the main incisors.

FIG. 1 shows the proposed crown in two projections in FIG. 2, a view along arrow A in FIG. one; in fig. 3 is a view along arrow B in FIG. 2; in fig. 4 - cutting insert, the appearance; in fig. 5 is a diagram of the placement of incisors and contours formed by lines passing through the cutting edges of the incisors,

The crown includes a corona ring 1 and cutting inserts 2, consisting of a support plate 3, main rezp. 4 and 5, borehole and kernoobrazuyu: cutting blades G and 7. As a squall, the core and core: 1 x cutters 6 and 7 are used larger-section thyristal plates compared to the main cutters 4 and 5. Cutters 4-7 are installed in a vertical plane in a stepwise manner, while the contours formed by lines 1 passing through the cutting edges of the borehole and core-forming cutters 6 and 7, cover the contour - formed by the lines II passing through the herpes p. edges of the main incisors I and o (fig, o). The outer lateral edges of the extreme main incisors 3 are displaced relative to the outer lateral faces of the squam / cinema and core 6 fold incisors 6 and 7 in .- :: oron of the center line S of the crown butt end; -: the end 1, and the back edge of the incisors 5 are adjacent to the front face of the incisors 6 and 7. rivui such a crowns

; -1li P and 1, respectively, with CTODOK

The borehole and core walls are perceived by the reinforced cutters 6 and 7, preventing the main cutters 4 and 5 from breaking. This allows an increase in penetration rate and mechanical drilling rate.

Claims (2)

1. A drill bit, including a crown ring and cutting inserts, consisting of a base plate, main, core-well-forming incisors, characterized in that, in order to increase penetration and mechanical drilling speed by protecting the main cutters from breakages, the outer side edges of the extreme main the incisors are shifted relative to the corresponding faces of the well- and core-forming incisors towards the center line of the end face of the crown ring, and the rear faces of the main incisors adjoin the front UAH of m of well- and core-forming incisors, 2. The crown according to claim 1, characterized in that the incisors in the vertical plane are installed stepwise, while the contours formed by the lines passing through the cutting edges of the borehole core-forming incisors encompass the respective contours of the main incisors. Sources of information taken into account in the examination: 1, USSR Author's Certificate No. 25О705, class, Е21В 9/16, 28.04.61, 2. GOST 11108-70. Carbide crowns for core drilling of medium hardness, M., 1972, p. 14-15 (prototype), .i 5i / 5A Vidb 5-6 one g Vu2.2 Vu2. Rig. fuz.5