CN103774995A - Anti-impact pickaxe-shaped diamond composite tooth - Google Patents

Anti-impact pickaxe-shaped diamond composite tooth Download PDF

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CN103774995A
CN103774995A CN201410042604.2A CN201410042604A CN103774995A CN 103774995 A CN103774995 A CN 103774995A CN 201410042604 A CN201410042604 A CN 201410042604A CN 103774995 A CN103774995 A CN 103774995A
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force
force surface
efg
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rib
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CN103774995B (en
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周付坤
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GUILIN STARDIAMOND SUPERHARD MATERIAL CO Ltd
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GUILIN STARDIAMOND SUPERHARD MATERIAL CO Ltd
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Abstract

The invention discloses an anti-impact pickaxe-shaped diamond composite tooth which is mainly prepared by compounding a polycrystalline diamond sheet and a cylindrical hard alloy base body. The lower surface of the polycrystalline diamond sheet is connected with the upper surface of the hard alloy base body in a compounding manner; the upper surface and the front and rear side surfaces of the polycrystalline diamond sheet consist of force application surfaces BI1H1E and BI2H2E and a force application ridge BE; the right side surface of the polycrystalline diamond sheet consists of force application surfaces EFG1, EFG2, FG1H1C and FG2H2C and force application ridges EF, FC, FG1 and FG2; the left side surface of the polycrystalline diamond sheet consists of a force application surface BI1I2. The anti-impact pickaxe-shaped diamond composite tooth has a good drilling effect on rock stratums with higher hardness.

Description

Shock resistance pick shape diamond composite teeth
Technical field
The present invention relates to drill bit and manufacture field, be specifically related to a kind of shock resistance pick shape diamond composite teeth.
Background technology
Polycrystal diamond composite teeth is the composite material being sintered under HTHP by polycrystalline diamond sheet and hard alloy substrate.Composite polycrystal-diamond has the advantages that hardness is high, abrasion resistance is good, and hard alloy substrate has improved pliability and the solderability of composite material on the whole.The hard alloy substrate of multiple polycrystal diamond composite teeths is embedded in respectively in the composite sheet installing hole of bit drills tooth front end face, and fixes by pricker welding manner; The diamond part of polycrystal diamond composite teeth is exposed the front end face of bit drills tooth, and as of paramount importance cutwork surface on drill bit.
The profile of traditional diamond composite teeth mostly is cylindrical, and its upper surface is that the upper surface of polycrystalline diamond sheet is smooth plane or an arc surface.The drill bit that this diamond composite teeth is housed has good drilling effect in even stratum, but when drill bit runs into the solid rock of hardness more than F7.5, due to the surface of diamond composite teeth and the contact area of rock stratum larger, and rock stratum hardness is very high, therefore the surface of plane or arc surface cannot embed rock in the time carrying out cutwork, easily there is the phenomenon of skidding, thereby the operating efficiency of drill bit is greatly reduced, even cannot creep into.In addition, in order to coordinate the diamond composite teeth of plane or arc surface, at present mostly be conchoidal for the upper surface of brill tooth that diamond composite teeth is installed, the upper surface that bores tooth has multiple to bore centered by the axis of tooth, and is the fan-shaped fin of curved surface or the groove that radially radiation is extended.Brill toothing guarantee diamond composite teeth is only in this way being installed after brill tooth, and the cutting edge face of its diamond composite teeth can all can produce cutting force in all directions of drill bit.But the brill tooth of this structure not only complex structure processing technology of existence difficulty own is large, drill produced cost is high; And be not easy to the installation of polycrystal diamond composite teeth and fix, the functional reliability of drill bit is low and not enough.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of polycrystal diamond composite teeth, and it has good drilling effect for the larger rock stratum of hardness.
For addressing the above problem, the present invention is achieved by the following technical solutions:
A kind of shock resistance pick shape diamond composite teeth, is mainly composited by polycrystalline diamond sheet and columniform hard alloy substrate.The soffit of polycrystalline diamond sheet is connected with hard alloy substrate upper surface is compound.Wherein:
The upper surface of polycrystalline diamond sheet and front and back sides are by force surface BI 1h 1e, BI 2h 2e and application of force rib BE form.Wherein force surface BI 1h 1e and force surface BI 2h 2e is trapezoidal surface, force surface BI 1h 1e and force surface BI 2h 2e intersects at application of force rib BE and about application of force rib BE symmetry.
The right flank of polycrystalline diamond sheet is by force surface EFG 1, EFG 2, FG 1h 1c, FG 2h 2c and application of force rib EF, FC, FG 1, FG 2.Wherein force surface EFG 1with force surface EFG 2be fan-shaped surface, force surface EFG 1with force surface EFG 2intersect at application of force rib EF and about application of force rib EF symmetry.Force surface FG 1h 1c and force surface FG 2h 2c is the trapezoidal surface of class, force surface FG 1h 1c and force surface FG 2h 2c intersects at application of force rib FC and about application of force rib FC symmetry.Force surface EFG 1with force surface FG 1h 1c intersects at straight line FG 1, force surface EFG 2with force surface FG 2h 2c intersects at straight line FG 2.
The left surface of polycrystalline diamond sheet is by force surface BI 1i 2form.Wherein force surface BI 1i 2for semicircular outer convex globoidal, this force surface BI 1i 2about horizontal vertical line BD symmetry.
Force surface BI 1h 1e and force surface BI 1i 2intersect at camber line BI 1, force surface BI 1h 1e and force surface EFG 1intersect at camber line EG 1, force surface BI 1h 1e and force surface FG 1h 1c intersects at camber line G 1h 1.Force surface BI 2h 2e and force surface BI 1i 2intersect at camber line BI 2, force surface BI 2h 2e and force surface EFG 2intersect at camber line EG 2, force surface BI 2h 2e and force surface FG 2h 2c intersects at camber line G 2h 2.
In such scheme, force surface BI 1h 1e and force surface BI 2h 2e is trapezoidal plane or trapezoidal outer convex globoidal.
In such scheme, force surface EFG 1with force surface EFG 2be fan-shaped plane or fan-shaped outer convex globoidal.
In such scheme, force surface FG 1h 1c and force surface FG 2h 2c is the trapezoidal plane of class or the trapezoidal inner concave arc surface of class.
In such scheme, the angle α of application of force rib BE and horizontal plane is 15 °～18 °.
In such scheme, the angle β of application of force rib EF and application of force rib BE is 90 °～120 °
In such scheme, force surface BI 1h 1e and force surface BI 2h 2the angle of E is 120 °～150 °.
In such scheme, force surface EFG 1with force surface EFG 2angle be 90 °～150 °.
In such scheme, force surface FG 1h 1c and force surface FG 2h 2the angle of C is 90 °～150 °.
Compared with prior art, the present invention, by improving the surface texture of diamond composite teeth, is processed into by the work plane of diamond compact on irregular (curved surface) being combined by force surface and application of force rib; Shock resistance pick shape diamond composite teeth is in the time of work like this, and its summit F and main broken rib FC, EF that is positioned at right flank directly exerts pressure to rock, by rock fracture, rock is more firmly more easily by pressure break, by the rock of pressure break by front main broken rib fragmentation, then through the cutting face of right flank, i.e. fan-shaped EFG 1, EFG 2with the trapezoidal FG of class 1h 1c, FG 2h 2c cutting, drives landwaste plane, takes landwaste to ground by drilling fluid.Owing to adopting multiple force surfaces, to different directions, the application of force is carried out in rock stratum, effectively prevent the generation of skidding, thereby make this diamond composite teeth can creep into the rock stratum that hardness is higher, and change the working method of the single cutting of diamond compact in the past into pressure break, fragmentation, plane and open three-in-one brand-new working method; In addition,, because the force surface of diamond composite teeth and application of force rib are towards different directions, even if diamond composite teeth is arranged on bit body by the mode of horizontal Tile, also can realize all directions application of force of drill bit to rock stratum; Therefore coordinate with it without baroque drill body, thereby greatly simplified structure and the processing technology of drill body, reduced the processing cost of drill bit, also improved the functional reliability of drill bit simultaneously.
Accompanying drawing explanation
Fig. 1 is a kind of front elevation drawing of shock resistance pick shape diamond composite teeth.
Fig. 2 is the right view of Fig. 1.
Fig. 3 is the left view of Fig. 1.
The specific embodiment
A kind of shock resistance pick shape diamond composite teeth, as shown in Figures 1 to 3, it is mainly composited by polycrystalline diamond sheet and columniform hard alloy substrate.The soffit of polycrystalline diamond sheet is connected with hard alloy substrate upper surface is compound.Wherein:
The upper surface of polycrystalline diamond sheet and front and back sides are by force surface BI 1h 1e, BI 2h 2e and application of force rib BE form.Wherein force surface BI 1h 1e and force surface BI 2h 2e is trapezoidal surface, force surface BI 1h 1e and force surface BI 2h 2e intersects at application of force rib BE and about application of force rib BE symmetry.In the present invention, described force surface BI 1h 1e and force surface BI 2h 2e can be trapezoidal plane, can be also trapezoidal outer convex globoidal.But in the preferred embodiment of the present invention, described force surface BI 1h 1e and force surface BI 2h 2e is trapezoidal outer convex globoidal.In the present invention, the angle α of application of force rib BE and horizontal plane is 15 °～18 °.Force surface BI 1h 1e and force surface BI 2h 2the angle of E is 120 °～150 °.
The right flank of polycrystalline diamond sheet is by force surface EFG 1, EFG 2, FG 1h 1c, FG 2h 2c and application of force rib EF, FC, FG 1, FG 2.Wherein force surface EFG 1with force surface EFG 2be fan-shaped surface, force surface EFG 1with force surface EFG 2intersect at application of force rib EF and about application of force rib EF symmetry.Force surface FG 1h 1c and force surface FG 2h 2c is the trapezoidal surface of class, force surface FG 1h 1c and force surface FG 2h 2c intersects at application of force rib FC and about application of force rib FC symmetry.Force surface EFG 1with force surface FG 1h 1c intersects at straight line FG 1, force surface EFG 2with force surface FG 2h 2c intersects at straight line FG 2.In the present invention, described force surface EFG 1with force surface EFG 2can be fan-shaped plane, can be also fan-shaped outer convex globoidal.But in the preferred embodiment of the present invention, described force surface EFG 1with force surface EFG 2all fan-shaped outer convex globoidals.In the present invention, force surface FG 1h 1c and force surface FG 2h 2c can be the trapezoidal plane of class, can be also the trapezoidal inner concave arc surface of class.In the preferred embodiment of the present invention, force surface FG 1h 1c and force surface FG 2h 2c is the trapezoidal inner concave arc surface of class.In one's duty invention, the angle β of application of force rib EF and application of force rib BE be 90 °～120 ° in the present invention, force surface EFG 1with force surface EFG 2angle be 90 °～150 °.Force surface FG 1h 1c and force surface FG 2h 2the angle of C is 90 °～150 °.
The left surface of polycrystalline diamond sheet is by force surface BI 1i 2form.Wherein force surface BI 1i 2for semicircular outer convex globoidal, this force surface BI 1i 2about horizontal vertical line BD symmetry.
Force surface BI 1h 1e and force surface BI 1i 2intersect at camber line BI 1, force surface BI 1h 1e and force surface EFG 1intersect at camber line EG 1, force surface BI 1h 1e and force surface FG 1h 1c intersects at camber line G 1h 1.Force surface BI 2h 2e and force surface BI 1i 2intersect at camber line BI 2, force surface BI 2h 2e and force surface EFG 2intersect at camber line EG 2, force surface BI 2h 2e and force surface FG 2h 2c intersects at camber line G 2h 2.
In actual production process, the shaping grinding apparatus of the polycrystalline diamond sheet of shock resistance pick shape diamond composite teeth is previously prepared moulding, adds man-hour, only polycrystalline diamond powder need be joined in shaping grinding apparatus, and be suppressed and formed by HTHP.But consider the molding structure more complicated of polycrystalline diamond sheet, in order, for clearly explaining the structure of this shock resistance pick shape diamond composite teeth, to simulate the supposition forming process of shock resistance pick shape diamond composite teeth herein by the processing case of a supposition,
(1) supposition has the polycrystalline diamond sheet of a right cylindrical in advance, and the upper surface of this polycrystalline diamond sheet is plane.If the orbicular upper surface of polycrystalline diamond sheet exists a diameter AB ', the level height of terminal A equals terminal B ' level height.There is a diameter CD in the orbicular soffit of polycrystalline diamond sheet, the level height of end points C equals the level height of end points D.In vertical and horizontal plane, diameter AB ' is all parallel to diameter CD, and terminal A is vertical with horizontal plane with the line AC of end points C, terminal B ' vertical with horizontal plane with the line B ' D of end points D, line AC is parallel to line B ' D.
(2) right-hand towards polycrystalline diamond sheet, and symmetrical axle using line AC as view, carry out following processing: take terminal A as starting point, at the upper surface of polycrystalline diamond sheet to terminal B ' direction, to the lower truncation of retreading, now the upper surface of polycrystalline diamond sheet has become the elliptic plane of an inclination from positive circular surface.The major axis of gained elliptic plane is AB, and the level height of the terminal A of major axis is higher than the level height of the terminal B of major axis; Terminal B is vertical with horizontal plane with the line BD of end points D.This elliptic plane is that the angle α of major axis A B and horizontal plane is 15 °～18 °.
(3) towards the top of polycrystalline diamond sheet, and symmetrical axle using major axis A B as view, carry out following processing: take major axis A B as center line, on gained elliptic plane, distinguish to left down and each partial application to bottom right a semicircle cambered surface BI of the now each acquisition of the left side of polycrystalline diamond sheet and right flank 1i 2and AH 1h 2, the upper surface of polycrystalline diamond sheet obtains 2 about AB axial symmetry and 2 crossing step surface BI 1h 1e and BI 2h 2e.Wherein BD is semicircle cambered surface BI 1i 2axis of symmetry, AC is semicircle cambered surface AH 1h 2axis of symmetry.Step surface BI 1h 1e and step surface BI 2h 2the angle of E is 120 °～150 °.
In the present invention, the incision left in this step (3) and incision to the right can adopt truncation mode or to outer arc butt formula; In the time adopting truncation mode, 2 step surface BI that obtain 1h 1e and BI 2h 2e is trapezoidal plane; In the time adopting to outer arc butt formula, 2 step surface BI that obtain 1h 1e and BI 2h 2e is trapezoidal convex globoidal.
(4) right-hand towards polycrystalline diamond sheet, and symmetrical axle using line AC as view, carry out following processing: take line AC as center line, the front portion of 2 semicircular surfaces of gained respectively left after and to right back each partial application, the mode by truncation is by the semicircular surface AH of polycrystalline diamond sheet right flank 1h 2become 2 about AC symmetry and crossing sail shape plane AH 1c and AH 2c.Wherein the angle of these 2 crossing sail shape planes is 90 °～150 °.
(5) the major axis A B that establishes polycrystalline diamond sheet goes up 1 E of existence, has 1 F on line AC, and the angle β of line EF and major axis A B is 90 °～120 °.Right-hand towards polycrystalline diamond sheet, and symmetrical axle using line EF as view, carry out following processing: take the line EF of an E and some F as center line, at 2 sail shape plane AH of gained 1c and AH 2the top of C tiltedly lower and tiltedly lower each partial application, now sail shape plane AH to the right left respectively 1scalloped surface EFG is formed at the top of C 1, class ladder plane FG is formed at bottom 1h 1c, sail shape plane AH 2scalloped surface EFG is formed at the top of C 2, class ladder plane FG is formed at bottom 2h 2c.Wherein scalloped surface EFG 1with scalloped surface EFG 2symmetrical and crossing about EF, 2 scalloped surface EFG 1with scalloped surface EFG 2angle be 90 °～150 °; Class ladder plane FG 1h 1c and class ladder plane FG 2h 2c is symmetrical and crossing about FC, 2 class ladder plane FG 1h 1c and class ladder plane FG 2h 2the angle of C is 90 °～150 °
In the present invention, cutting and can adopt truncation mode or to outer arc butt formula to right back cutting to left back in this step (5); In the time adopting truncation mode, the scalloped surface EFG obtaining 1with scalloped surface EFG 2for fan-shaped plane; In the time adopting to outer arc butt formula, the scalloped surface EFG obtaining 1with scalloped surface EFG 2for fan-shaped convex globoidal.
(6) in the present invention, 2 class step surface remaining after step (5) is processed can be plane, but in order further to improve the cutting ability of this diamond composite teeth, the present invention can increase this step (6), i.e. right-hand towards polycrystalline diamond sheet, and symmetrical axle using line AC as view, carry out following processing: at the class ladder plane FG of step (5) gained 1h 1c and class ladder plane FG 2h 2the surface of C carries out respectively cutting to inner arc, now the cancave cambered surface of 2 sail shapes of 2 sail shape plane formation.

Claims (9)

1. a shock resistance pick shape diamond composite teeth, is mainly composited by polycrystalline diamond sheet and columniform hard alloy substrate; The soffit of polycrystalline diamond sheet is connected with hard alloy substrate upper surface is compound; It is characterized in that:
The upper surface of polycrystalline diamond sheet and front and back sides are by force surface BI 1h 1e, BI 2h 2e and application of force rib BE form; Wherein force surface BI 1h 1e and force surface BI 2h 2e is trapezoidal surface, force surface BI 1h 1e and force surface BI 2h 2e intersects at application of force rib BE and about application of force rib BE symmetry;
The right flank of polycrystalline diamond sheet is by force surface EFG 1, EFG 2, FG 1h 1c, FG 2h 2c and application of force rib EF, FC, FG 1, FG 2; Wherein force surface EFG 1with force surface EFG 2be fan-shaped surface, force surface EFG 1with force surface EFG 2intersect at application of force rib EF and about application of force rib EF symmetry; Force surface FG 1h 1c and force surface FG 2h 2c is the trapezoidal surface of class, force surface FG 1h 1c and force surface FG 2h 2c intersects at application of force rib FC and about application of force rib FC symmetry; Force surface EFG 1with force surface FG 1h 1c intersects at straight line FG 1, force surface EFG 2with force surface FG 2h 2c intersects at straight line FG 2;
The left surface of polycrystalline diamond sheet is by force surface BI 1i 2form; Wherein force surface BI 1i 2for semicircular outer convex globoidal, this force surface BI 1i 2about horizontal vertical line BD symmetry;
Force surface BI 1h 1e and force surface BI 1i 2intersect at camber line BI 1, force surface BI 1h 1e and force surface EFG 1intersect at camber line EG 1, force surface BI 1h 1e and force surface FG 1h 1c intersects at camber line G 1h 1; Force surface BI 2h 2e and force surface BI 1i 2intersect at camber line BI 2, force surface BI 2h 2e and force surface EFG 2intersect at camber line EG 2, force surface BI 2h 2e and force surface FG 2h 2c intersects at camber line G 2h 2.
2. a kind of shock resistance pick shape diamond composite teeth according to claim 1, is characterized in that: force surface BI 1h 1e and force surface BI 2h 2e is trapezoidal plane or trapezoidal outer convex globoidal.
3. a kind of shock resistance pick shape diamond composite teeth according to claim 1, is characterized in that: force surface EFG 1with force surface EFG 2be fan-shaped plane or fan-shaped outer convex globoidal.
4. a kind of shock resistance pick shape diamond composite teeth according to claim 1, is characterized in that: force surface FG 1h 1c and force surface FG 2h 2c is the trapezoidal plane of class or the trapezoidal inner concave arc surface of class.
5. a kind of shock resistance pick shape diamond composite teeth according to claim 1, is characterized in that: the angle α of application of force rib BE and horizontal plane is 15 °～18 °.
6. a kind of shock resistance pick shape diamond composite teeth according to claim 1, is characterized in that: the angle β of application of force rib EF and application of force rib BE is 90 °～120 °
7. a kind of shock resistance pick shape diamond composite teeth according to claim 1, is characterized in that: force surface BI 1h 1e and force surface BI 2h 2the angle of E is 120 °～150 °.
8. a kind of shock resistance pick shape diamond composite teeth according to claim 1, is characterized in that: force surface EFG 1with force surface EFG 2angle be 90 °～150 °.
9. a kind of shock resistance pick shape diamond composite teeth according to claim 1, is characterized in that: force surface FG 1h 1c and force surface FG 2h 2the angle of C is 90 °～150 °.
CN201410042604.2A 2014-01-28 2014-01-28 Shock resistance pick shape diamond composite teeth Active CN103774995B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107023291A (en) * 2016-06-03 2017-08-08 于殿财 Broken rock colter and the broken rock device using the colter
CN109630025A (en) * 2019-01-30 2019-04-16 四川川石金刚石钻头有限公司 A kind of heteromorphic teeth PDC drill bit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1071084A (en) * 1962-12-11 1967-06-07 Coal Industry Patents Ltd Improvements in mineral-mining cutter picks
CN2297177Y (en) * 1997-06-17 1998-11-18 江汉石油管理局钻头厂 New tooth shape for tri-cone rotary drill bit
CN101560869A (en) * 2009-05-27 2009-10-21 江汉石油钻头股份有限公司 Convex head deflective wedge tooth
CN202544846U (en) * 2012-02-13 2012-11-21 孟凡友 Auger bit with polygonal shoulder and shank with convex plates
CN203769660U (en) * 2014-01-28 2014-08-13 桂林星钻超硬材料有限公司 Anti-impact pickaxe-shaped diamond composite tooth

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1071084A (en) * 1962-12-11 1967-06-07 Coal Industry Patents Ltd Improvements in mineral-mining cutter picks
CN2297177Y (en) * 1997-06-17 1998-11-18 江汉石油管理局钻头厂 New tooth shape for tri-cone rotary drill bit
CN101560869A (en) * 2009-05-27 2009-10-21 江汉石油钻头股份有限公司 Convex head deflective wedge tooth
CN202544846U (en) * 2012-02-13 2012-11-21 孟凡友 Auger bit with polygonal shoulder and shank with convex plates
CN203769660U (en) * 2014-01-28 2014-08-13 桂林星钻超硬材料有限公司 Anti-impact pickaxe-shaped diamond composite tooth

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107023291A (en) * 2016-06-03 2017-08-08 于殿财 Broken rock colter and the broken rock device using the colter
CN109630025A (en) * 2019-01-30 2019-04-16 四川川石金刚石钻头有限公司 A kind of heteromorphic teeth PDC drill bit

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