CN102699555A - Transitional connection piece of polycrystalline diamond clad sheet and drill bit matrix and connection process for transitional connection piece - Google Patents
Transitional connection piece of polycrystalline diamond clad sheet and drill bit matrix and connection process for transitional connection piece Download PDFInfo
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- CN102699555A CN102699555A CN2012102028106A CN201210202810A CN102699555A CN 102699555 A CN102699555 A CN 102699555A CN 2012102028106 A CN2012102028106 A CN 2012102028106A CN 201210202810 A CN201210202810 A CN 201210202810A CN 102699555 A CN102699555 A CN 102699555A
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Abstract
The invention relates to a transitional connection piece of a polycrystalline diamond clad sheet and a drill bit matrix and a connection process for the transitional connection piece. The transitional connection piece is formed by stacking two cylinders of different sizes, wherein a positioning hole matched with the small-size cylinder is formed in the drill bit matrix; and the end face of the large-size cylinder is welded with a hard alloy bottom layer of the polycrystalline diamond clad sheet. According to the transitional connection piece, the hard alloy bottom layer of the polycrystalline diamond clad sheet is welded with the large-size cylinder of the transitional connection piece; the diamond clad sheet connected with the transitional connection piece is fixedly arranged in the positioning hole of the drill bit matrix; and welded joints between the polycrystalline diamond clad sheet and the drill bit matrix as well as between the transitional connection piece and the drill bit matrix are filled by adopting a high-frequency heating or flame brazing method. According to the connection process, heat damage of high temperature to the diamond clad sheet is reduced, and the high cutting performance is retained; the relatively high connection strength of the diamond clad sheet is guaranteed; the aims of quick assembly and quick positioning of the clad sheet are fulfilled; and the connection strength is improved at the same time.
Description
Technical field
The invention belongs to the boring means of oil, geology, coal, be specifically related to the transition piece of a kind of composite polycrystal-diamond and bit matrix and be connected technology.
Technical background
Diamond compact bit is high because of its drilling efficiency; By a plurality of industries such as extensive required oil, geology, coals; One step of key of diamond compact bit production process is exactly the welding of diamond compact sheet and bit matrix; When diamond compact bit is worked in the shaft bottom, bear very big cutting force and impulsive force simultaneously, therefore requiring will have enough bonding strengths between the two.Welding method commonly used at present is disposable gas brazing or high frequency assistant brazing; All be to adopt direct contact of the solder side of manual realization diamond compact sheet and bit matrix to accomplish whole welding process; Main existing problems show the following aspects: the one, and diamond compact sheet location difficulty, positioning accuracy are difficult to control.In welding process, a welding post need be joined two welders, is responsible for specially to bit matrix heating and solder application by a main welder, and an auxiliary welder is responsible for specially and cooperates laying and locating of diamond compact sheet.Whole welding process is accomplished by manual operations at present, and welding temperature and time are all judged with people's experience, be difficult to realize the mechanization of welding process and the standardization of welding quality, and labour intensity is big, production efficiency is low; The 2nd, because of the property of diamond compact sheet requires welding method and scolder type selecting have also been proposed requirements at the higher level; The fusion temperature of solder can not be too high, and too high meeting causes the carbonization of diamond compact sheet, can not be too low; Bonding strength between too low diamond compact sheet and the bit matrix can not get guaranteeing; In the diamond compact bit course of work, the diamond compact sheet comes off easily, causes diamond compact bit to lose efficacy.
A lot of researchs have also been done at the bonding strength that improves between diamond compact sheet and the bit matrix both at home and abroad; Major part all is to change aspect welding procedure, welding material or the syndeton, though obtain certain effect, most, technologies too high because of cost too complicacy etc. are difficult to obtain industrialization promotion and use; Like: the polycrystalline diamond compact bit soldering processes (patent No.: 00117754.0) be employed on bit matrix backrest tooth and the composite polycrystal-diamond solder side and process identical profile of tooth; Adopt then the superaudio induction furnace with the composite polycrystal-diamond soldering on the backrest tooth, the method helps improving weld strength, but increase rate is very limited; In addition; Because of size restrictions, the profile of tooth on the processing solder side, and the relative complex of welding procedure has all obviously increased the drill bit cost; The welding method of the diamond compact bit (patent No.: be in the graphite jig of sealing 86103437); Under same temperature, use two kinds of methods of silver-base solder and pressureless impregnation simultaneously, be welded on the prefabricated profiled drill bit of powder metallurgy to diamond compact, it comprises with powder metallurgy sintered preformed hole and the drill bit that supports the back of the body of having; Place diamond compact and filling braze, filler; Apply silver brazing flux and assembling sealing etc., this kind welding method technology more complicated, not too suitable to baroque diamond compact bit; Technical merit to the welder is had relatively high expectations, and the scope of application is less relatively.
Summary of the invention
The technical problem that the present invention solved provides a kind of automatization level that is easy to realize welding process, alleviates the labour intensity of drill bit welding, improves production efficient; Can improve simultaneously weld strength and guarantee welding quality; Can avoid the carbonization phenomenon under the condition of high temperature of diamond compact sheet; Can improve weld strength again, reduce diamond compact bit in the course of the work, the generation of flake phenomenon; Improve the life-span of diamond compact bit, composite polycrystal-diamond simple in structure is with the transition piece of bit matrix and be connected technology.
For solving above-mentioned technical problem, the technical scheme that the present invention adopts:
The transition piece of a kind of composite polycrystal-diamond and bit matrix; Its special character is: described transition piece is made up of two cylinder stacks that vary in size; Bit matrix is provided with the locating hole with small size cylinder coupling, the carbide alloy bottom welding of the end face of large scale cylinder and glomerocryst composite polycrystal-diamond.
Can be provided with male thread on the above-mentioned small size cylinder.
The diameter of above-mentioned large scale cylinder is consistent with the diamond compact diameter, height 2 ~ 5mm.
The diameter of above-mentioned small size cylinder is 1/3rd to 2/3rds of a body diameter, highly is 3 ~ 7mm.
The transition piece of a kind of composite polycrystal-diamond and bit matrix be connected technology, its special character is: realize through following steps:
(1), the carbide alloy bottom of composite polycrystal-diamond and the large scale cylinder of transition piece are welded together;
(2), be fixed on the diamond compact that is connected with transition piece in the locating hole of bit matrix;
(3), the weld seam that adopts high-frequency heating or gas brazing method to accomplish respectively between composite polycrystal-diamond and bit matrix and transition piece and the bit matrix is at last filled.
The welding method of above-mentioned step (1) adopts vacuum brazing, diffusion welding (DW).
The welding process of above-mentioned step (1) is carried out under vacuum or atmosphere protection, and the weld joint stable temperature is more than 800 ℃, and when reaching welding temperature, be 2 ~ 5 seconds weld interval.
Be placed with weld tabs between the small size cylinder of above-mentioned step (2) and the bit matrix locating hole, weld tabs thickness 0.1 ~ 0.3mm, 600 ℃ ~ 750 ℃ of fusing points, and before the weld tabs placement, speckle with the solder flux of fusion.
The solder fusing point that above-mentioned step (3) is selected is between 600 ℃ ~ 750 ℃.
Compared with prior art, beneficial effect of the present invention:
1, the welding of the carbide alloy bottom of transition piece and diamond compact, owing to adopted vacuum or atmosphere protection, and welding temperature high (more than 800 ℃), both reduced the fire damage of high temperature to diamond compact, keep its good cutting performance; Guaranteed the bonding strength ability that it is higher relatively again.
2, on the basis of location that is threaded or closely cooperates, fill soldering between transition piece and the bit matrix, both solved the Fast Installation and the orientation problem of composite sheet, improved its bonding strength simultaneously, guaranteed the stable of welding quality.
3, make the welding process automation of diamond compact bit become possibility, can improve drill produced efficient, and stable welding quality, can extensively should have broad application prospects in industries such as oil, geology and coals.
Description of drawings
Fig. 1 is embodiments of the invention 1 structural representations;
Fig. 2 is embodiments of the invention 2 structural representations;
Fig. 3 is that the present invention connects diamond compact sheet and bit matrix sketch map.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is elaborated.
Referring to Fig. 1-3; Transition piece 3 of the present invention is made up of two cylinder stacks that vary in size; Bit matrix 4 is provided with the locating hole with small size cylinder 6 couplings, carbide alloy bottom 2 welding of the end face of large scale cylinder 5 and glomerocryst composite polycrystal-diamond 1.
Referring to Fig. 2, above-mentioned small size cylinder 6 is provided with male thread.
The diameter of above-mentioned large scale cylinder 5 is consistent with the diamond compact diameter, height 2 ~ 5mm.
The diameter of above-mentioned small size cylinder 6 is 1/3rd to 2/3rds of cylinder 5 diameters, highly is 3 ~ 7mm, but suitably changes according to the big I of bit size.
Referring to Fig. 3, be that example is carried out the substep explanation with Ф 13.3 * 4.5 specification diamond compacts.
The first step: transition piece 3 processing.If bit matrix 4 materials are 45
#Steel then selects 45 for use
#Steel is processed transition piece 3, and makes the diameter identical (13.3mm) of large scale cylinder and diamond compact, highly is 2mm; Small size body diameter 5mm, height 5mm.
Second step: bit matrix 4 processing; Different with the conventional bit matrix is; Many locating holes corresponding on its solder side of the bit matrix that the present invention relates to the small size cylinder of transition piece 3; The diameter of the small size cylinder of locating hole diameter and transition piece 3 is to correspondence, and therefore processing the locating hole diameter is 5mm, and the degree of depth is 5mm.
The 3rd step: the end face of the large scale cylinder 5 of cleaning carbide alloy bottom 2 and transition piece 3, comprise oil removing, sandblast etc., expose fresh; Coat brazing flux and high-temp solder or weld tabs then respectively, adopt welding methods such as vacuum brazing, diffusion welding (DW) to weld, characteristics are weld interval and Controllable Temperature; Easily be automated, welding temperature is controlled at more than 800 ℃, because of workpiece less; High-temperature duration is shorter during welding, and the fire damage of diamond compact is obviously reduced.
The 4th step: the transition piece 3 that will be welded with diamond compact is cleared up again; Comprise end face and end face; And recess in the cleaning bit matrix 4, transition piece 3 and bit matrix 4 are closely cooperated, characteristics are to help realizing quick, the accurate location of diamond compact sheet; Reduce the non-cutting time in the welding process, improve welding efficiency.If adopt other to connect pattern, guarantee that the bit matrix part-structure is corresponding with the small size cylinder and the structure of transition piece 3.
The 5th step: the mode of utilizing high-frequency heating or gas brazing; Adopt the weld seam between silver solder difference filling diamond compact and transition piece and the bit matrix; Welding temperature is controlled between 600 ℃ ~ 750 ℃; (closely cooperating) the fixing combination that is connected with soldering that has been to realize to be threaded of its advantage has guaranteed bonding strength and quality.
Claims (9)
1. the transition piece of composite polycrystal-diamond and bit matrix; It is characterized in that: described transition piece (3) is made up of two cylinder stacks that vary in size; Bit matrix (4) is provided with the locating hole with small size cylinder (6) coupling, carbide alloy bottom (2) welding of the end face of large scale cylinder (5) and glomerocryst composite polycrystal-diamond (1).
2. the transition piece of composite polycrystal-diamond according to claim 1 and bit matrix is characterized in that: can be provided with male thread on the described small size cylinder (6).
3. the transition piece of composite polycrystal-diamond according to claim 1 and 2 and bit matrix is characterized in that: the diameter of described large scale cylinder (5) is consistent with the diamond compact diameter, height 2 ~ 5mm.
4. the transition piece of composite polycrystal-diamond according to claim 3 and bit matrix is characterized in that: the diameter of described small size cylinder (6) is 1/3rd to 2/3rds of cylinder (a 5) diameter, highly is 3 ~ 7mm.
The transition piece of a composite polycrystal-diamond and bit matrix be connected technology, it is characterized in that: realize through following steps:
(1), the carbide alloy bottom (2) of composite polycrystal-diamond (1) and the large scale cylinder (5) of transition piece (3) are welded together;
(2), be fixed on the diamond compact that is connected with transition piece (3) (4) in the locating hole of bit matrix (4);
(3), the weld seam that adopts high-frequency heating or gas brazing method to accomplish respectively between composite polycrystal-diamond (1) and bit matrix (4) and transition piece (3) and the bit matrix (4) is at last filled.
6. the transition piece of composite polycrystal-diamond according to claim 5 and bit matrix be connected technology, it is characterized in that: the welding method of described step (1) adopts vacuum brazing, diffusion welding (DW).
7. the transition piece of composite polycrystal-diamond according to claim 5 and bit matrix be connected technology; It is characterized in that: the welding process of described step (1) is carried out under vacuum or atmosphere protection; The weld joint stable temperature is more than 800 ℃; When reaching welding temperature, be 2 ~ 5 seconds weld interval.
8. the transition piece of composite polycrystal-diamond according to claim 5 and bit matrix be connected technology; It is characterized in that: be placed with weld tabs between the small size cylinder (6) of described step (2) and bit matrix (4) locating hole; Weld tabs thickness 0.1 ~ 0.3mm; 600 ℃ ~ 750 ℃ of fusing points, and before the weld tabs placement, speckle with the solder flux of fusion.
9. the transition piece of composite polycrystal-diamond according to claim 5 and bit matrix be connected technology, it is characterized in that: the solder fusing point that described step (3) is selected is between 600 ℃ ~ 750 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102028106A CN102699555A (en) | 2012-06-19 | 2012-06-19 | Transitional connection piece of polycrystalline diamond clad sheet and drill bit matrix and connection process for transitional connection piece |
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| CN2012102028106A CN102699555A (en) | 2012-06-19 | 2012-06-19 | Transitional connection piece of polycrystalline diamond clad sheet and drill bit matrix and connection process for transitional connection piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551793A (en) * | 2013-10-29 | 2014-02-05 | 西南石油大学 | Explosion-proof enhancing diamond compact and tungsten carbide matrix welding method |
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| US4200159A (en) * | 1977-04-30 | 1980-04-29 | Christensen, Inc. | Cutter head, drill bit and similar drilling tools |
| EP0157625A2 (en) * | 1984-04-03 | 1985-10-09 | Sumitomo Electric Industries Limited | Composite tool |
| GB2193740A (en) * | 1986-08-11 | 1988-02-17 | De Beers Ind Diamond | Cutting element for a mining machine |
| CN1078766A (en) * | 1993-05-03 | 1993-11-24 | 中国地质大学长江钻头公司 | Low temperature electroforming diamond compact and oil bit thereof |
| US5810103A (en) * | 1996-12-03 | 1998-09-22 | Sylvan Engineering Company | Method and apparatus for mounting PCD compacts |
| US5823277A (en) * | 1995-06-16 | 1998-10-20 | Total | Cutting edge for monobloc drilling tools |
| CN201314198Y (en) * | 2008-12-12 | 2009-09-23 | 西南石油大学 | Polycrystalline diamond composite sheet |
| CN202763304U (en) * | 2012-06-19 | 2013-03-06 | 中煤科工集团西安研究院 | Transition piece of polycrystalline diamond compound sheet and drill bit matrix |
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2012
- 2012-06-19 CN CN2012102028106A patent/CN102699555A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4200159A (en) * | 1977-04-30 | 1980-04-29 | Christensen, Inc. | Cutter head, drill bit and similar drilling tools |
| EP0157625A2 (en) * | 1984-04-03 | 1985-10-09 | Sumitomo Electric Industries Limited | Composite tool |
| GB2193740A (en) * | 1986-08-11 | 1988-02-17 | De Beers Ind Diamond | Cutting element for a mining machine |
| CN1078766A (en) * | 1993-05-03 | 1993-11-24 | 中国地质大学长江钻头公司 | Low temperature electroforming diamond compact and oil bit thereof |
| US5823277A (en) * | 1995-06-16 | 1998-10-20 | Total | Cutting edge for monobloc drilling tools |
| US5810103A (en) * | 1996-12-03 | 1998-09-22 | Sylvan Engineering Company | Method and apparatus for mounting PCD compacts |
| CN201314198Y (en) * | 2008-12-12 | 2009-09-23 | 西南石油大学 | Polycrystalline diamond composite sheet |
| CN202763304U (en) * | 2012-06-19 | 2013-03-06 | 中煤科工集团西安研究院 | Transition piece of polycrystalline diamond compound sheet and drill bit matrix |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551793A (en) * | 2013-10-29 | 2014-02-05 | 西南石油大学 | Explosion-proof enhancing diamond compact and tungsten carbide matrix welding method |
| CN103551793B (en) * | 2013-10-29 | 2016-05-11 | 西南石油大学 | A kind of diamond compact of anti-cracking enhancing degree and tungsten carbide matrix welding method |
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Application publication date: 20121003 |