CN108222847B - Diamond bit containing hard and brittle abrasive particles and manufacturing process thereof - Google Patents
Diamond bit containing hard and brittle abrasive particles and manufacturing process thereof Download PDFInfo
- Publication number
- CN108222847B CN108222847B CN201810234209.2A CN201810234209A CN108222847B CN 108222847 B CN108222847 B CN 108222847B CN 201810234209 A CN201810234209 A CN 201810234209A CN 108222847 B CN108222847 B CN 108222847B
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- China
- Prior art keywords
- abrasive particles
- diamond
- hard
- brittle
- abrasive
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- 239000002245 particle Substances 0.000 title claims abstract description 107
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 65
- 239000010432 diamond Substances 0.000 title claims abstract description 65
- 238000004519 manufacturing process Methods 0.000 title abstract description 12
- 239000011159 matrix material Substances 0.000 claims abstract description 28
- 239000006061 abrasive grain Substances 0.000 claims description 29
- 229910052580 B4C Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000010431 corundum Substances 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 13
- 238000003825 pressing Methods 0.000 abstract description 6
- 238000003892 spreading Methods 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 abstract description 5
- 238000004080 punching Methods 0.000 abstract description 5
- 238000007493 shaping process Methods 0.000 abstract description 3
- 238000012216 screening Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 230000036346 tooth eruption Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention discloses a diamond drill bit containing hard and brittle abrasive particles and a manufacturing process thereof. The manufacturing process comprises the following steps: shaping and screening hard and brittle abrasive particles, 2) punching on a template, 3) pre-pressing a carcass sheet, 4) spreading coarse-grain-size abrasive particles on the carcass sheet, 5) spreading fine-grain-size abrasive particles on the carcass sheet, and 6) combining multiple layers of carcass sheets for cold press molding. The diamond drill bit solves the problem of unstable drill bit performance caused by the factor of relative position difference between hard and brittle abrasive particles and diamond in a matrix, and improves the batch performance stability and drilling efficiency of the drill bit.
Description
Technical Field
The invention relates to a diamond drill bit, in particular to a diamond drill bit containing hard and brittle abrasive particles and a manufacturing process thereof.
Background
The acquisition of underground deep rock cores by drilling means is a straightforward method of evaluating geological mineral reserves, whereas efficient acquisition of rock cores requires that the drill bit must have good service performance. In recent years, with the development of efficient exploration and evaluation research of deep energy around the earth, the situation of drilling hard, dense and complex stratum is more and more common. In addition, with the enhancement of environmental awareness and the deep advancement of ecological construction in recent years, exploration operations are also developed towards the direction of green drilling, and the 'green and coordination' is penetrated in the whole drilling process, so that the aspects of improving drilling efficiency, reducing disturbance to the environment in the construction process and the like are embodied. Therefore, higher demands are placed on the performance of diamond bits. By adding a suitable concentration of hard and brittle abrasive particles to the matrix, the drilling performance of the drill bit can be improved. At present, in the prior art, hard and brittle abrasive particles and diamond particles are randomly distributed in a matrix, so that the problem of unstable drill performance caused by factors of difference of relative positions of the hard and brittle abrasive particles and the diamond in the matrix cannot be solved, the batch stability of drill performance is poor, and the drilling performance cannot be effectively predicted.
Disclosure of Invention
In order to solve the technical problems, the invention provides the diamond drill bit containing the hard brittle abrasive particles and the manufacturing process thereof, which can solve the problem of unstable drill bit performance caused by the factor of difference between the relative positions of the hard brittle abrasive particles and diamond in a matrix, and improve the batch performance stability and the drilling efficiency of the drill bit.
The technical scheme adopted by the invention is as follows:
the utility model provides a diamond bit that contains hard brittle abrasive grain, includes the matrix, is equipped with multiunit abrasive grain in the matrix, its characterized in that: each group of abrasive particles comprises diamond abrasive particles and hard brittle abrasive particles, and the diamond abrasive particles and the hard brittle abrasive particles are mutually overlapped.
In the diamond drill bit containing the hard and brittle abrasive particles, each group of abrasive particles comprises one hard and brittle abrasive particle and one diamond abrasive particle, wherein the hard and brittle abrasive particle is positioned in front of or behind the diamond abrasive particle, and the granularity of the hard and brittle abrasive particle is smaller than that of the diamond abrasive particle.
In the diamond drill bit containing the hard and brittle abrasive particles, each group of abrasive particles comprises two hard and brittle abrasive particles and one diamond abrasive particle, the two hard and brittle abrasive particles are respectively positioned at the front side and the rear side of the diamond abrasive particle, and the granularity of the hard and brittle abrasive particles is larger than that of the diamond abrasive particle.
In the diamond drill bit containing the hard and brittle abrasive particles, the granularity of the diamond abrasive particles is 420-590 mu m, the granularity of the hard and brittle abrasive particles is 300-710 mu m, the hard and brittle abrasive particles are made of silicon carbide, corundum, cubic boron carbide or hard alloy particles, and the hardness of the matrix is HRC 15-HRC 30.
The manufacturing process of the diamond bit containing the hard and brittle abrasive particles comprises the following steps:
shaping and screening hard and brittle abrasive particles, 2) punching on a template, 3) pre-pressing a carcass sheet, 4) spreading coarse-grain-size abrasive particles on the carcass sheet, 5) spreading fine-grain-size abrasive particles on the carcass sheet, and 6) combining multiple layers of carcass sheets for cold press molding.
In the above-mentioned process for manufacturing the diamond bit containing hard and brittle abrasive grains, the shaped hard and brittle abrasive grains in step 1) make spherical hard and brittle grains account for 70% -85% of the total amount, and hard and brittle abrasive grains with sharp corners account for 15% -30% of the total amount.
In the above-mentioned process for manufacturing diamond drill bit containing hard and brittle abrasive grains, two kinds of holes with different apertures are formed in the template in step 2) according to the design, the size of the large aperture is not more than the average grain size of the coarse grain size abrasive grains, and the size of the small aperture is not more than 0.5 times of the average grain size of the fine grain size abrasive grains.
In the manufacturing process of the diamond bit containing the hard and brittle abrasive particles, after the multi-layer matrix sheet in the step 6) is pressed and molded, the multi-layer matrix sheet is placed in a reduction furnace for 10-15 minutes at 300-350 ℃ to ensure that the pressure-sensitive adhesive is fully volatilized.
Compared with the prior art, the invention has the beneficial effects that:
the mode of lapping the hard and brittle abrasive particles and the diamond can directly improve the cutting performance of single-particle diamond, and the particle size of the hard and brittle abrasive particles positioned at two sides of the diamond is larger than that of the diamond along the cutting direction, so that grooves are formed at two sides of the diamond by utilizing the hard and brittle characteristics of the hard and brittle abrasive particles during drilling, and the cooling effect of the single-particle diamond is improved; the particle size of the hard brittle abrasive particles positioned at the front and the rear of the diamond is smaller than that of the diamond, so that the diamond is favorably sharpened by utilizing the brittle crushing characteristic of the hard brittle abrasive particles during drilling, and meanwhile, the problem of unstable drill performance caused by the factors of relative position difference between the hard brittle abrasive particles and the diamond in a matrix is solved, and the batch performance stability of the drill is improved; in addition, through the adjustment of the proportions of different lap joint forms of the diamond and the hard brittle abrasive particles, the adjustment of the drilling performance of the drill bit can be more targeted, and the accuracy of the drilling performance prediction is improved.
Drawings
Fig. 1 is a diagram showing the distribution of diamond abrasive grains and hard brittle abrasive grains in a matrix according to example 1 of the present invention.
Fig. 2 is a diagram showing the distribution of diamond abrasive grains and hard brittle abrasive grains in a matrix according to example 2 of the present invention.
Fig. 3 is a diagram showing the distribution of diamond abrasive grains and hard brittle abrasive grains in a matrix according to example 3 of the present invention.
In the figure: 1-diamond; 2-hard brittle abrasive particles; 3-gate, arrow is cutting direction.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1, the diamond drill bit containing hard and brittle abrasive grains of the invention comprises a matrix 4, wherein a plurality of groups of abrasive grains are arranged in the matrix 4, each group of abrasive grains comprises a hard and brittle abrasive grain 2 and a diamond abrasive grain 1, the diamond abrasive grain 1 and the hard and brittle abrasive grain 2 are mutually overlapped, the hard and brittle abrasive grain 2 is positioned in front of the diamond abrasive grain 1, and the granularity of the hard and brittle abrasive grain 2 is smaller than that of the diamond abrasive grain 1. The hard brittle abrasive particles 2 may also be located behind the diamond abrasive particles 1 as shown in fig. 2.
As shown in fig. 3, the number of the hard brittle abrasive particles 2 in each group of abrasive particles may be two, and the hard brittle abrasive particles 2 are located on the front and rear sides of the diamond abrasive particles 1, respectively, and the particle size of the hard brittle abrasive particles 2 is larger than that of the diamond abrasive particles 1.
The diamond granularity is 420-590 μm, the granularity of the hard brittle abrasive grain is 300-710 μm, the hard brittle abrasive grain can be made of silicon carbide, corundum, cubic boron carbide and hard alloy, and the hardness of the matrix is HRC 15-HRC 30.
A diamond bit manufacturing process containing hard and brittle abrasive particles comprises the following steps of
(1) Shaping and sieving hard brittle abrasive particles
The hard brittle abrasive particles added to the bit matrix are ensured by a sizing process such that the spherical hard brittle abrasive particles comprise 70% -85% of the total number and the hard brittle abrasive particles with sharp corners comprise 15% -30% of the total number.
(2) Punching holes on the templates
And 2 kinds of holes with different apertures are formed in the template according to design requirements, wherein the punching size of the large aperture is not larger than the average particle size of the abrasive particles with the coarse aperture, and the punching size of the small aperture is not larger than 0.5 times of the average particle size of the abrasive particles with the fine aperture, so that the abrasive particles with the coarse aperture cannot fall into the holes with the small aperture.
(3) Pre-pressed carcass sheet
And weighing matrix powder which is uniformly mixed according to design requirements, placing the matrix powder into a cold pressing mold for press molding, and adjusting the pressing force according to the performances of different matrixes.
(4) Spreading coarse grain abrasive particles on a matrix sheet
Spraying proper thermosensitive adhesive on the matrix, covering the punched template on the matrix sheet, sprinkling coarse-grain-diameter abrasive particles on the surface of the template, and uniformly hanging and brushing by using a soft brush until the coarse-grain-diameter abrasive particles completely fall into the large-aperture holes in the template.
(5) Spreading fine grain size abrasive particles on a matrix sheet
After the coarse grain size abrasive particles are spread, the fine grain size abrasive particles are sprayed on the template to be expressed, and a soft brush is used for uniformly brushing until the fine grain size abrasive particles fall into small-aperture holes in the template.
(6) Multi-layer carcass sheet combination cold press molding
And (3) stacking and combining the pressed single-layer matrix sheets into a drill bit cutting tooth cold-pressing steel die, and performing drill bit cutting tooth cold-pressing molding by using an oil press. Placing the cold-pressed cutting teeth into a reducing furnace for 10-15 minutes at 300-350 ℃ to ensure the volatilization of the pressure sensitive adhesive.
(7) Drill bit sintering and machining
And (3) placing the cold-pressed drill bit cutting teeth into a graphite die, firstly filling non-working layer powder and gauge protection polycrystalline in the upper layer, then placing a drill bit rigid body, performing hot-pressing sintering on a drill bit semi-finished product by using an intermediate frequency sintering furnace, and finally performing machining on the drill bit semi-finished product to finish manufacturing of a drill bit finished product.
Claims (2)
1. The utility model provides a diamond bit that contains hard brittle abrasive grain, includes the matrix, is equipped with multiunit abrasive grain in the matrix, its characterized in that: each group of abrasive particles comprises diamond abrasive particles and hard brittle abrasive particles, and the diamond abrasive particles and the hard brittle abrasive particles are mutually overlapped;
each group of abrasive particles comprises a hard brittle abrasive particle and a diamond abrasive particle, wherein the hard brittle abrasive particle is positioned in front of or behind the diamond abrasive particle, and the granularity of the hard brittle abrasive particle is smaller than that of the diamond abrasive particle;
or each group of abrasive particles comprises two hard brittle abrasive particles and one diamond abrasive particle, the two hard brittle abrasive particles are respectively positioned at the front side and the rear side of the diamond abrasive particle, and the granularity of the hard brittle abrasive particles is larger than that of the diamond abrasive particles.
2. A diamond drill bit comprising hard and brittle abrasive particles according to claim 1, wherein: the granularity of the diamond abrasive particles is 420-590 mu m, the granularity of the hard brittle abrasive particles is 300-710 mu m, the hard brittle abrasive particles are made of silicon carbide, corundum, cubic boron carbide or hard alloy particles, and the hardness of the matrix is HRC 15-HRC 30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810234209.2A CN108222847B (en) | 2018-03-21 | 2018-03-21 | Diamond bit containing hard and brittle abrasive particles and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810234209.2A CN108222847B (en) | 2018-03-21 | 2018-03-21 | Diamond bit containing hard and brittle abrasive particles and manufacturing process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108222847A CN108222847A (en) | 2018-06-29 |
| CN108222847B true CN108222847B (en) | 2024-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810234209.2A Active CN108222847B (en) | 2018-03-21 | 2018-03-21 | Diamond bit containing hard and brittle abrasive particles and manufacturing process thereof |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1160001A1 (en) * | 1983-09-05 | 1985-06-07 | Всесоюзный научно-исследовательский и конструкторско-технологический институт природных алмазов и инструмента | Granulated diamond drilling crown bit |
| CN2673557Y (en) * | 2003-06-24 | 2005-01-26 | 张星亮 | High self sharping metal bonding agent diamond product |
| CN103867133A (en) * | 2014-03-27 | 2014-06-18 | 中钢集团洛阳耐火材料研究院有限公司 | Self-sharpening artificial-diamond-impregnated bit with continuous crushing capacity |
| CN204419039U (en) * | 2014-12-29 | 2015-06-24 | 北京探矿工程研究所 | Porous matrix diamond-impregnated bit |
| CN207988952U (en) * | 2018-03-21 | 2018-10-19 | 湖南科技大学 | A kind of diamond bit containing hard brittleness abrasive grain |
-
2018
- 2018-03-21 CN CN201810234209.2A patent/CN108222847B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1160001A1 (en) * | 1983-09-05 | 1985-06-07 | Всесоюзный научно-исследовательский и конструкторско-технологический институт природных алмазов и инструмента | Granulated diamond drilling crown bit |
| CN2673557Y (en) * | 2003-06-24 | 2005-01-26 | 张星亮 | High self sharping metal bonding agent diamond product |
| CN103867133A (en) * | 2014-03-27 | 2014-06-18 | 中钢集团洛阳耐火材料研究院有限公司 | Self-sharpening artificial-diamond-impregnated bit with continuous crushing capacity |
| CN204419039U (en) * | 2014-12-29 | 2015-06-24 | 北京探矿工程研究所 | Porous matrix diamond-impregnated bit |
| CN207988952U (en) * | 2018-03-21 | 2018-10-19 | 湖南科技大学 | A kind of diamond bit containing hard brittleness abrasive grain |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108222847A (en) | 2018-06-29 |
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