CN108843247B - Natural diamond surface-inlaid coreless drill bit - Google Patents
Natural diamond surface-inlaid coreless drill bit Download PDFInfo
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- CN108843247B CN108843247B CN201810687375.8A CN201810687375A CN108843247B CN 108843247 B CN108843247 B CN 108843247B CN 201810687375 A CN201810687375 A CN 201810687375A CN 108843247 B CN108843247 B CN 108843247B
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- 239000010432 diamond Substances 0.000 title claims abstract description 78
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 75
- 239000002245 particle Substances 0.000 claims abstract description 53
- 239000011159 matrix material Substances 0.000 claims abstract description 35
- 238000005520 cutting process Methods 0.000 claims description 14
- 239000008187 granular material Substances 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 35
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 7
- 239000011435 rock Substances 0.000 description 6
- 230000002441 reversible effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
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Classifications
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- 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
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- 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
- E21B10/56—Button-type inserts
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
A diamond surface-mounted drill bit comprises a drill bit body, a matrix column, an upright column and diamond particles, wherein the drill bit body comprises a drill bit upper body and a drill bit lower body, and a conical hole, a multi-lateral-row hole, a first hole drain hole, a second hole drain hole and a third hole drain hole are formed in the drill bit upper body; the drill bit lower body is a drill bit crown part, and a chip groove is formed between the drill bit crown parts; the matrix column is fixed on the front end of the blade of the drill bit body and the upright column, and the diamond particle surface is inlaid on the matrix column. The diamond particles with staggered sizes are adopted to slow down the impact and friction received by the drill bit during drilling, the service life of the diamond particles is prolonged, the arc-shaped fixing groove is arranged on the crown of the drill bit to fix the matrix column, so that the crown blade of the drill bit is more firmly fixed, and the adopted conical guide and polygonal loosening structure ensures that the drill bit is accurately guided and not eccentric during drilling and does not loosen during reversal, thereby avoiding the occurrence of the drill dropping phenomenon.
Description
Technical Field
The invention relates to the technical field of mine drilling equipment, in particular to a natural diamond surface-set coreless drill bit.
Background
Diamond is the hardest material found in the world at present, a diamond bit is one of tools which are widely and more advanced to be applied in various drilling projects at present, the diamond bit has higher drilling efficiency, good drilling quality, light construction labor intensity and lower drilling cost, and can be divided into a surface diamond-inlaid drill bit and a diamond-impregnated drill bit according to the inlaying mode of the diamond in a bit matrix, the surface diamond-inlaid drill bit inlays diamond particles on the surface of the bit matrix, the diamond-impregnated drill bit uniformly inlays the diamond particles in the bit matrix, the surface diamond-inlaid drill bit enters a tooth block during drilling, the efficiency is high, and the diamond bit is widely applied in medium-soft and hard rock strata; the surface of the diamond-inlaid drill bit is provided with single-particle diamonds, so that the arrangement mode of the single-particle diamonds inlaid on the surface influences the impact and friction force of the diamond particles, the firmness and reliability of the blades of the drill bit are seriously influenced by the straight-surface welding mode of a diamond matrix, if the drill bit is eccentrically drilled or loosened in the long-depth drilling process, the stress of the diamond particles is more uneven, the impact and friction force on one side with large unbalance loading is large, the abrasion is serious, and the drill bit is scrapped prematurely.
Disclosure of Invention
Aiming at the problems, the invention provides a natural diamond surface-inlaid coreless drill bit, which strengthens the stability of a diamond tool bit by improving the welding structure form of a diamond drill bit matrix on a blade, changes the shape of the surface inlaid with diamond and reduces the impact force and the friction force applied during drilling by adopting a mode of staggered arrangement of diamond particle sizes, and adopts a conical guide and a polygonal anti-loosening device to prevent the drill bit from being eccentric and loose.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a natural diamond table inlays centreless drill bit, includes drill bit body, matrix post, stand, diamond granule, the drill bit body include drill bit upper portion body and drill bit lower part body, its characterized in that: the upper body of the drill bit comprises a hollow cylindrical section at the upper part and a trapezoidal section at the lower part, a polygonal hole and a conical hole are sequentially arranged in the cylindrical section from top to bottom, the polygonal hole section is provided with a pin hole in the radial direction, a triangular cone at the tail end of the conical hole is positioned in the trapezoidal section at the lower part, the outer side surface of the trapezoidal section is an arc surface, and a first hole, a second hole, a third hole and a fourth hole are arranged in the trapezoidal section; the drill bit comprises a drill bit body, a drill bit lower body, a drill bit crown, a drill bit upper body and a drill bit lower body, wherein the drill bit lower body is the crown of the drill bit and is arranged on a trapezoidal cambered surface of the drill bit upper body, a chip groove is arranged between the drill bit crowns, the chip groove can be arranged in a spiral form, the drill bit crown comprises a front end part, a side cambered surface, a back part, a U-shaped groove and a gauge protection belt, the front end part comprises a front blade, a side blade and a lower blade, arc-shaped grooves are arranged on the front blade, the side blade and the lower blade, a matrix column is fixed in each arc-shaped groove, and the front end part; the back part forms an auxiliary blade, and the inclination angle of the auxiliary blade is 5-20 degrees; the U-shaped groove is positioned at the lower side of the back and is formed from the side arc surface of the crown, the side arc surface is a cylindrical arc surface with the same diameter, the gauge belt is positioned between the front blade and the auxiliary blade, the upper surface of the gauge belt of each crown of the drill bit is positioned in the same plane, and the diameter of the outside circle of the gauge belt is equal to the diameter of the cylindrical side guard surface; the upright post is vertically fixed in a hole IV formed in the drill bit body section, the matrix column is fixed in an arc-shaped groove of the crown part of the drill bit and on the upright post, and the mounting directions of the matrix column on the crown part of the drill bit and the upright post are the same; the diamond particles are surface-mounted on the tyre body column, and the cutting surfaces of the diamond particles are in the same orientation.
Preferably, the first hole in the trapezoidal section of the upper body of the drill bit is arranged on the trapezoidal arc surface of the trapezoidal section and is communicated with a triangular cone at the tail end of a conical hole of the upper body, the second hole is arranged on the lower end surface of the trapezoidal section and is communicated with a triangular conical hole at the tail end of the conical hole of the upper body, the second holes are symmetrically arranged on the first central line of the end surface of the drill bit body section, the third hole is arranged on the lower end surface of the trapezoidal section and is communicated with the triangular conical hole at the tail end of the conical hole of the upper body, the third holes are symmetrically arranged on the second central line of the end surface of the drill bit body section, the first central line is perpendicular to the second central line, the fourth holes are symmetrically arranged on the second central line, and the fourth holes are not through holes.
Preferably, the polygonal holes can be quadrilateral holes or hexagonal holes.
Preferably, the first hole, the second hole and the third hole are arranged into straight channels or spiral channels.
Preferably, the front end surface of the carcass column is planar or conical or trapezoidal in shape.
Preferably, the diamond particles are cubic or polygonal rhombus in shape.
As optimization, the sizes of the diamond particles are staggered, the diamond particles are embedded on the other surfaces of the blade upper matrix except the fixed surface, and the diamond particles are embedded on the rest surfaces of the matrix column on the upright column except the fixed bottom surface.
Preferably, the grade of diamond particles on the upper front section and the outer side surface of the tire body column is larger than that of diamond particles on the upper outer arc surface and the inner side surface.
As optimization, the front blade arc-shaped grooves are set to be 2-8 and can be arranged in 1-3 rows, the side blade arc-shaped grooves are set to be 1-4, the lower blade arc-shaped grooves are set to be 1-2, the corresponding tire body column setting number is equal to the arc-shaped groove setting number, and the arc-shaped groove radians are matched with the tire body column radians.
Preferably, the side arc surface or the outer arc surface gradually decreases from the gauge belt, the inclination angle is greater than 0 degree and smaller than 15 degrees, and the gauge belt outer arc surface and the front end blade outer arc surface are maximum diameter outer arc surfaces.
The invention has the beneficial effects that: compared with the prior art, the natural diamond surface-inlaid coreless drill bit has the advantages that impact and friction of the drill bit during drilling are relieved by the aid of diamond particles which are arranged in a staggered mode, the service life of the diamond particles is prolonged, the crown of the drill bit is provided with the arc-shaped fixing groove for fixing the matrix column, so that the crown blade of the drill bit is fixed more firmly, the drill bit is accurately guided and not eccentric during drilling and is not loosened during reverse rotation due to the conical guide and polygonal loosening structure, and the phenomenon of drill drop is avoided.
Drawings
FIG. 1 is a general block diagram of the present invention;
FIG. 2 is a partial cross-sectional view of the present invention;
FIG. 3 is a cross-sectional view of a cylindrical section polygonal bore of a bit body of the present invention;
FIG. 4 is a top view of the present invention;
FIG. 5 is a matrix column of the present invention with diamond particles inserted;
FIG. 6 is a top view of another embodiment of the present invention;
the drill bit comprises a drill bit body 1, a matrix column 2, a column 3, diamond particles 4, a drill bit upper body 11, a drill bit lower body 12, a cylindrical section 111, a trapezoidal section 112, a conical hole 1112, a polygonal hole 1111, a pin hole 1113, a first hole 1121, a second hole 1122, a third hole 1123, a fourth hole 1124, a chip removal hole 13, a front end 121, a side arc surface 123, a back 122, a U-shaped groove 124, a diameter protection band 125, a front blade 1211, a blade at the side 1212 and a lower blade 1213.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the first embodiment shown in fig. 1-5, a natural diamond surface-set coreless drill bit comprises a drill bit body 1, a matrix column 2, a column 3 and diamond particles 4, wherein the drill bit body 1 comprises an upper drill bit body 11 and a lower drill bit body 12, and is characterized in that: the upper body 11 of the drill bit comprises a hollow cylindrical section 111 at the upper part and a trapezoidal section 112 at the lower part, a polygonal hole 1111 and a tapered hole 1112 are sequentially arranged in the cylindrical section 111 from top to bottom, the polygonal hole 1111 is provided with a pin hole 1113 in the radial direction, the triangular cone at the tail end of the tapered hole 1112 is positioned in the trapezoidal section 112 at the lower part, the outer side surface of the trapezoidal section 112 is an arc surface, and a first hole 1121, a second hole 1122, a third hole 1123 and a fourth hole 1124 are arranged in the trapezoidal section; the drill bit lower body 12 is a crown of the drill bit and is arranged on a trapezoidal arc surface of the upper body 11, and chip grooves 13 are arranged between the crown of the drill bit and can be arranged in a spiral form.
The crown part of the drill bit can be set into 3-6 groups, and can be selected according to the size of a drilled hole and the hardness of a rock stratum; the crown part of the drill bit comprises a front end part 121, a side arc surface 123, a back part 122, a U-shaped groove 124 and a gauge protection belt 125, wherein the front end part 121 comprises a front blade 1211, a side blade 1212 and a lower blade 1213, arc-shaped grooves are formed in the front blade 1211, the side blade 1212 and the lower blade 1213, the carcass column 2 is fixed in the arc-shaped grooves, and the arrangement of the arc-shaped grooves is equivalent to that welding grooves are formed for the welding of the carcass column, so that compared with the traditional plane welding fusion part, the welding is more firm; the front end part 121 and the carcass column 1 form a main blade of the crown part of the cutter bit, and play a main drilling role; the back part 122 forms an auxiliary blade, the inclination angle of the auxiliary blade is 5-20 degrees, and the backward inclination angle of the auxiliary blade is set to reduce the friction force of the blade in the rotary drilling process, but cannot be too large, so that the overall strength of the blade is weakened too much; the U-shaped grooves 124 are positioned on the lower side of the back 122 and are formed from the side arc surface 123 of the crown, the U-shaped grooves are vertically arranged to reduce the friction force of the blades in the drilling process, the number of the U-shaped grooves is 1-4, the U-shaped grooves are arranged to reduce the friction force of the blades of the drill bit body on the vertical surface, the number of the U-shaped grooves cannot be too large, and the mechanical strength of the whole blades is weakened too much; the side arc surface 123 is a cylindrical arc surface with the same diameter, the gauge belt 125 is located between the front blade and the auxiliary blade, the upper surface of the gauge belt of each crown of the drill bit is located in the same plane, that is, one gauge belt is arranged on the upper surface of each crown of the drill bit, so that the crowns of the drill bit are located in the same plane when drilling, the drilling synchronization is ensured, the eccentricity is avoided, the diameter of the outer circle of the gauge belt 125 is equal to the diameter of the cylindrical side arc surface, and in this embodiment, the diameter of the whole outer arc surface is the same as the diameter of the outer arc surface of the gauge belt.
The upright post 3 is vertically fixed in a hole four 1124 formed in the drill bit body section, the matrix column 2 is fixed in an arc-shaped groove of the crown part of the drill bit and on the upright post 3, the mounting directions of the matrix column on the crown part of the drill bit and the upright post are the same, the cutting direction of the blade of each crown part is ensured to be the same, diamond particles on the matrix column of the crown part of the drill bit form a main drilling cutting edge, main drilling and diameter expansion are carried out, the diamond particles on the matrix column on the upright post at the center of the drill bit are auxiliary drilling cutting edges, ore rocks and the like at the center of the drilling are drilled, and spiral drill cuttings which are not easy to break and formed by the; the body column is fixed by brazing or cladding; the surfaces of the diamond particles 4 are inlaid on the matrix columns 2, and the cutting faces of the diamond particles 4 face the same direction, so that the same drilling angle and the same drilling force are ensured when the drill bit drills.
The polygonal hole 1111 and the tapered hole 1112 are arranged in the upper body of the drill bit, the tapered hole can ensure the correct guidance of the drill bit during assembly and drilling, and the eccentric phenomenon does not occur, the polygonal hole is used for preventing the looseness of the drill bit during reverse rotation, and the drill bit can not drop during both forward rotation and reverse rotation; the polygonal hole 1111 is provided with a pin hole 1113 in the radial direction, so that the position of the drill bit and the position of the drill rod are fixed.
As a further optimization of this embodiment, the first inner hole 1121 of the trapezoidal section of the upper body of the drill is disposed on the trapezoidal arc surface of the trapezoidal section and is communicated with the triangular cone at the end of the tapered hole of the upper body, the second hole 1122 is disposed on the lower end surface of the trapezoidal section and is communicated with the triangular tapered hole at the end of the tapered hole of the upper body, the second holes 1122 are symmetrically arranged on the first center line of the end surface of the drill body section, the third holes 1123 are disposed on the lower end surface of the trapezoidal section and are communicated with the triangular tapered hole at the end of the tapered hole of the upper body, the third holes 1123 are symmetrically arranged on the second center line of the end surface of the drill body section, the first center line is perpendicular to the second center line, the fourth holes 1124 are symmetrically arranged on the second center line, the fourth holes are not 1124 through holes, the first to third holes are water drain holes for cooling the blade of the drill and the diamond particles, the four holes 1124 are internally fixed with the upright columns 3, the number of the upright columns 3 can be set to be corresponding according to the actual requirement and the size of the drill bit, and 2 are preferred.
As a further optimization of the embodiment, the polygonal hole 111 is preferably a quadrilateral hole or a hexagonal hole, and is mainly used for preventing the drill bit from loosening and falling off during rotation.
As a further optimization of the embodiment, a straight channel or a spiral channel is arranged in the first hole 1121, the second hole 1122 and the third hole 1123, the spiral channel enables water from the upper part to form a spiral traveling path, when the chip removal groove is in a spiral form, the spiral of the water discharge hole and the spiral of the chip removal groove are in opposite directions, and the direction of the cooling water after the cooling water comes out from the water discharge hole and after the cooling water reaches the blade is changed to be consistent with the spiral direction of the chip removal groove, so that the cooling water is more beneficial to chip removal.
As a further optimization of this embodiment, the shape of the front end face of the carcass column 2 is set to be planar, conical or trapezoidal, and can be selected according to rock strata with different hardness levels, the selected planar shape with higher hardness can be selected, the selected trapezoidal shape with medium hardness can be selected, and the selected conical shape with a certain softness below the medium hardness can be selected in the rock strata.
As a further optimization of this embodiment, the diamond particles 4 are natural diamond particles, which have the hardest hardness, and the diamond particles are shaped like a cube or a polygonal diamond, and the natural diamond particles are generally cubic or polygonal diamonds and can be selected according to the properties of the rock formation or the actual working conditions.
As a further optimization of the embodiment, the diamond particles 4 are arranged in a staggered manner, and the distribution of the diamond particles on the matrix is uniformly distributed, so that the impact force and the friction force applied to the diamond particles during drilling can be uniformly distributed, the overlarge stress on local diamond particles is reduced, and the flushing drill cuttings can be conveniently discharged; diamond particles are embedded on the other surfaces of the blade upper tire body except for the fixed surface, and the tire body column fixed in the blade arc-shaped groove is fixed in the groove due to the lower arc surface, so that the diamond particles are only embedded on the front end surface, the side surface and the upper outer arc surface of the tire body column; the rest surfaces of the carcass column on the upright post except the fixed bottom surface are embedded with diamond particles, namely the diamond particles are embedded on the whole extrados surface and the front end surface of the carcass column.
As shown in fig. 6, in the second embodiment, the side arc surface is an outer arc surface which gradually decreases from the gauge belt, the inclination angle is greater than 0 degree and smaller than 15 degrees, the gauge belt outer arc surface and the front end blade outer arc surface are maximum diameter outer arc surfaces, in the first embodiment, a U-shaped groove is provided for reducing the friction force of the rotary drilling, in the present embodiment, the outer arc surfaces of the gauge belt and the front end blade are maximum diameter positions, so as to ensure the same diameter of the drill hole when the drill bit drills, and simultaneously, in order to reduce the friction force during the rotary drilling, the rear side of the gauge belt, i.e., the lower portion of the back of the crown portion of the drill bit, is a gradually decreasing outer arc surface, so that the overall strength of the crown portion of the drill bit is ensured, and the friction force is reduced, so that the drilling is faster and the drilling efficiency is.
When the drill bit drills, diamond particles on a matrix column at the crown part of the drill bit are drilled as a main drilling edge, the diamond particles on the matrix column at the center upright column of the drill bit have the function of an auxiliary drilling edge, drilled drill cuttings are spirally discharged along with the rotation and drilling of the drill bit, the auxiliary drilling edge is used for cutting off the drill cuttings which are not broken to form chips and discharging the chips from a chip discharge groove, and the movement path of the drill cuttings is spiral, so that when the chip discharge groove is spiral, the effect of accelerating the discharge of the drill cuttings is realized; meanwhile, after being added from the upper part of the drill bit, the cooling liquid is sprayed out from the first hole to the third hole in a multi-path mode, when the arranged water discharging hole is a reverse spiral, the sprayed cooling liquid is reflected when meeting a drill edge to form a positive spiral, the positive spiral is consistent with the spiral of the chip discharging groove, and the effect of accelerating the discharge of drill cuttings is achieved.
The arc-shaped grooves are formed, so that the welding firmness of the matrix column is enhanced, meanwhile, the drilling impact on single diamond particles is reduced due to the fact that the diamond particles are arranged in a staggered mode, the friction force is uniformly distributed, and the service life of the diamond particles is prolonged; the correct guiding and anti-loosening structure ensures that the drill bit is not eccentric during drilling and does not loose or fall off during reverse rotation.
The above embodiments are only specific examples of the present invention, and the protection scope of the present invention includes but is not limited to the product forms and styles of the above embodiments, and any suitable changes or modifications made by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.
Claims (4)
1. The utility model provides a natural diamond table inlays centreless drill bit, includes drill bit body, matrix post, stand, diamond granule, the drill bit body include drill bit upper portion body and drill bit lower part body, its characterized in that: the upper body of the drill bit comprises a hollow cylindrical section at the upper part and a trapezoidal section at the lower part, a polygonal hole and a conical hole are sequentially arranged in the cylindrical section from top to bottom, the polygonal hole section is provided with a pin hole in the radial direction, a triangular cone at the tail end of the conical hole is positioned in the trapezoidal section at the lower part, the outer side surface of the trapezoidal section is an arc surface, and a first hole, a second hole, a third hole and a fourth hole are arranged in the trapezoidal section; the drill bit comprises a drill bit body, a drill bit lower body, a drill bit crown, a drill bit upper body, a drill bit lower body, a drill bit upper body and a drill bit lower body, wherein the drill bit lower body is the crown of the drill bit and is arranged on the trapezoidal arc surface of the drill bit upper body, chip grooves are formed between the drill bit crown and are in a spiral form, the drill bit crown comprises a front end part, a side arc surface, a back part, a U-shaped groove and a gauge protection belt, the front end part comprises a front blade, a side blade and a lower blade, arc-shaped grooves are formed in the front blade, the side blade and the lower blade, a matrix column is; the back part forms an auxiliary blade, and the inclination angle of the auxiliary blade is 5-20 degrees; the U-shaped groove is positioned at the lower side of the back and is formed from the side arc surface of the crown, the side arc surface is a cylindrical arc surface with the same diameter, the gauge belt is positioned between the front blade and the auxiliary blade, the upper surface of the gauge belt of each crown of the drill bit is positioned in the same plane, and the outside diameter of the gauge belt is equal to the diameter of the cylindrical side arc surface; the upright post is vertically fixed in a hole IV formed in the drill bit body section, the matrix column is fixed in an arc-shaped groove of the crown part of the drill bit and on the upright post, and the mounting directions of the matrix column on the crown part of the drill bit and the upright post are the same; the diamond particles are inlaid on the surface of the matrix column, and the cutting surfaces of the diamond particles face the same direction; the drill bit upper body trapezoidal section inner hole I is arranged on a trapezoidal cambered surface of the trapezoidal section and is communicated with a triangular cone at the tail end of a conical hole of the upper body, the hole II is arranged on a lower end surface of the trapezoidal section and is communicated with a triangular conical hole at the tail end of the conical hole of the upper body, the holes are symmetrically arranged on the drill bit body section end surface central line I, the hole III is arranged on the lower end surface of the trapezoidal section and is communicated with the triangular conical hole at the tail end of the conical hole of the upper body, the holes are symmetrically arranged on the drill bit body section end surface central line II, the central line I is perpendicular to the central line II, the holes are symmetrically arranged on the central line II, and the hole IV is not a through hole; the polygonal hole is a quadrilateral hole or a hexagonal hole; the first hole, the second hole and the third hole are provided with straight channels or spiral channels; the shape of the front end surface of the carcass column is a plane shape; the diamond particles are cubic; the diamond particles are arranged in a staggered mode, the diamond particles are embedded in the surfaces of the blade upper matrix columns except the fixed surface, and the diamond particles are embedded in the surfaces of the upright column upper matrix columns except the fixed bottom surface; the diamond particle grades on the upper front end surface and the outer side surface of the tire body column are larger than those on the upper outer arc surface and the inner side surface.
2. The natural diamond surface-set coreless drill of claim 1, wherein: the planar shape is a cone or a trapezoid.
3. The natural diamond surface-set coreless drill of claim 1, wherein: the number of the front blade arc-shaped grooves is 2-8, the front blade arc-shaped grooves are arranged in 1-3 rows, the number of the side blade arc-shaped grooves is 1-4, the number of the lower blade arc-shaped grooves is 1-2, the number of the corresponding carcass columns is equal to the number of the arc-shaped grooves, and the radian of the arc-shaped grooves is matched with that of the carcass columns.
4. The natural diamond surface-set coreless drill of claim 1, wherein: the side cambered surface is an outer cambered surface which gradually reduces from the gauge belt, the inclination angle is greater than 0 degree and smaller than 15 degrees, and the gauge belt outer cambered surface and the front end blade outer cambered surface are maximum diameter outer cambered surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810687375.8A CN108843247B (en) | 2018-06-28 | 2018-06-28 | Natural diamond surface-inlaid coreless drill bit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810687375.8A CN108843247B (en) | 2018-06-28 | 2018-06-28 | Natural diamond surface-inlaid coreless drill bit |
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| Publication Number | Publication Date |
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| CN108843247A CN108843247A (en) | 2018-11-20 |
| CN108843247B true CN108843247B (en) | 2021-01-22 |
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| CN201810687375.8A Active CN108843247B (en) | 2018-06-28 | 2018-06-28 | Natural diamond surface-inlaid coreless drill bit |
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|---|---|---|---|---|
| CN110578472A (en) * | 2019-08-31 | 2019-12-17 | 洛阳恒诺锚固技术有限公司 | Drill bit welded by friction pressure and machining process |
| CN110886586B (en) * | 2019-12-18 | 2023-12-12 | 贵州高峰石油机械股份有限公司 | Method for improving cutting efficiency of mill shoes and fracture centering mill shoes used by method |
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| CN103756638A (en) * | 2014-01-14 | 2014-04-30 | 大连理工大学 | Magnetic grinding material |
| CN205314924U (en) * | 2016-02-03 | 2016-06-15 | 中煤科工河南钻探装备有限公司 | Mining drill bit of interchangeable hair style |
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| CN108843247A (en) | 2018-11-20 |
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