CN213478229U - Self-sharpening diamond compact and drill bit - Google Patents
Self-sharpening diamond compact and drill bit Download PDFInfo
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- CN213478229U CN213478229U CN202022522450.0U CN202022522450U CN213478229U CN 213478229 U CN213478229 U CN 213478229U CN 202022522450 U CN202022522450 U CN 202022522450U CN 213478229 U CN213478229 U CN 213478229U
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Abstract
The utility model relates to a diamond bit field. The utility model provides a from sharp formula diamond compact piece and drill bit, from sharp formula diamond compact piece include carbide base member, diamond layer, carbide obturator, and between the diamond cutting sword tooth was filled into to the carbide obturator, carbide obturator hardness was less than the diamond layer. When the composite sheet works, the hard alloy filling body can protect the diamond cutting edge teeth, the strength of the diamond cutting edge teeth is improved, the diamond cutting edge teeth are not easy to crack, and the service life of the composite sheet is prolonged. When the composite sheet cuts a stratum, the hardness of the hard alloy filling body is small, the hard alloy filling body is worn quickly, the diamond cutting edge teeth are exposed, the self-sharpening of the diamond cutting edge teeth is realized, the drilling efficiency is guaranteed, and the technical problem that the cutting edge teeth of the existing polycrystalline diamond composite sheet are low in strength and easy to crack, so that the overall service life of the composite sheet is short is solved.
Description
Technical Field
The utility model relates to a diamond bit field.
Background
The polycrystalline diamond drill bit cuts the stratum by means of a polycrystalline diamond compact (hereinafter referred to as a compact) arranged on a drill body, the compact mainly comprises a hard alloy matrix and a diamond layer arranged on the hard alloy matrix, during use, the stress of the stratum is overcome under the action of bit pressure and torque to bite into the stratum, and the underground stratum is sheared and broken under the action of the compact, so that the drilling of the drill bit is realized. The composite sheet generally comprises a hard alloy matrix and a diamond layer which are combined together at high temperature, and the composite sheet is fixed on a drill body in a welding or press-fitting mode to form the PCB drill bit.
In order to improve the drilling efficiency of the drill bit, chinese patent application with application publication number CN110500039A and application publication number 2019.11.26 discloses a polycrystalline diamond compact with extension, which comprises a polycrystalline diamond layer, wherein a plurality of polycrystalline diamond extensions are arranged on the polycrystalline diamond layer, and the plurality of polycrystalline diamond extensions can be in point contact with a cut object, so that the processed object is concentrated in stress and is fractured in advance by the stress, and the processing drilling efficiency is improved. Although the composite sheet can improve the drilling efficiency, the extension strength of each polycrystalline diamond is low when the composite sheet is used, the stress is easy to crack in the rock breaking process, the whole service life of the composite sheet is short, the replacement period of the composite sheet is short, the production cost is high, and the drilling efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a self-sharpening diamond composite sheet, which is used for solving the technical problem that the cutting edge teeth of the existing polycrystalline diamond composite sheet have low strength and are easy to crack, so that the overall service life of the composite sheet is short;
additionally, the utility model aims at still providing a drill bit for solve the technical problem that the polycrystalline diamond compact life-span that present drill bit adopted leads to creeps into inefficiency, manufacturing cost is high.
The utility model discloses a self-sharpening formula diamond compact piece adopts following technical scheme:
a self-sharpening diamond compact comprising:
a cemented carbide substrate;
the diamond layer is provided with a substrate joint surface and a blade tooth surface which are combined with the hard alloy substrate, and a plurality of diamond cutting blade teeth are arranged on the blade tooth surface;
and the hard alloy filling body is filled between the diamond cutting edge teeth, and the hardness of the hard alloy filling body is less than that of the diamond layer.
Has the advantages that: the utility model discloses there is the carbide obturator between the diamond cutting sword tooth of compound piece, and at compound piece during operation, the carbide obturator can protect the diamond cutting sword tooth, improves the intensity of diamond cutting sword tooth, and the diamond cutting sword tooth is difficult to the bursting apart, has prolonged the life of compound piece. When the composite sheet cuts a stratum, the hardness of the hard alloy filling body is small, the hard alloy filling body is worn quickly, the diamond cutting edge teeth are exposed, the self-sharpening of the diamond cutting edge teeth is realized, the drilling efficiency is guaranteed, and the technical problem that the cutting edge teeth of the existing polycrystalline diamond composite sheet are low in strength and easy to crack, so that the overall service life of the composite sheet is short is solved.
Further, the diamond cutting edge teeth are all arranged in the hard alloy filling body. The protective effect on the diamond cutting edge teeth is better.
Furthermore, the diamond layer is arranged in the hard alloy filling body, the peripheral surface of the hard alloy filling body and the peripheral surface of the hard alloy base body are both cylindrical surfaces, and the projections of the two on a plane vertical to the peripheral surface of the hard alloy base body are superposed. Simplify the structure of compound piece, the shaping of being convenient for.
Furthermore, the diamond layer comprises a diamond base layer and a cutting edge tooth layer, the substrate combining surface is arranged on the diamond base layer, the hard alloy filling body is arranged on the cutting edge tooth layer, the peripheral surface of the hard alloy filling body, the peripheral surface of the hard alloy substrate and the peripheral surface of the diamond base layer are cylindrical surfaces, and the projections of the peripheral surfaces of the hard alloy filling body, the hard alloy substrate and the diamond base layer on a plane perpendicular to the peripheral surface of the hard alloy substrate coincide. The diamond layer sets up by layers, and the structure is comparatively simple, and convenient processing reduces the processing cost.
Further, the hard alloy filling body is filled between the diamond cutting blade teeth through sintering. The bonding strength of the hard alloy filling body and the diamond cutting edge tooth is high.
The utility model discloses technical scheme of drill bit:
the drill bit, including boring the body and fixing the diamond compact piece on boring the body, the diamond compact piece includes:
a cemented carbide substrate;
the diamond layer is provided with a substrate joint surface and a blade tooth surface which are combined with the hard alloy substrate, and a plurality of diamond cutting blade teeth are arranged on the blade tooth surface;
and the hard alloy filling body is filled between the diamond cutting edge teeth, and the hardness of the hard alloy filling body is less than that of the diamond layer.
Has the advantages that: the utility model discloses a there is the carbide obturator between the diamond cutting sword tooth of the compound piece of diamond on the drill bit, and at compound piece during operation, the carbide obturator can protect the diamond cutting sword tooth, improves the intensity of diamond cutting sword tooth, and the diamond cutting sword tooth is difficult to bursting apart, has prolonged the life of compound piece. When the composite sheet is used for cutting a stratum, the hardness of the hard alloy filling body is low, the hard alloy filling body is quickly abraded, the diamond cutting edge teeth are exposed, the self-sharpening of the diamond cutting edge teeth is realized, the drilling efficiency is guaranteed, and the technical problems of low drilling efficiency and high production cost caused by short service life of the polycrystalline diamond composite sheet adopted by the conventional drill bit are solved.
Further, the diamond cutting edge teeth are all arranged in the hard alloy filling body. The protective effect on the diamond cutting edge teeth is better.
Furthermore, the diamond layer is arranged in the hard alloy filling body, the peripheral surface of the hard alloy filling body and the peripheral surface of the hard alloy base body are both cylindrical surfaces, and the projections of the two on a plane vertical to the peripheral surface of the hard alloy base body are superposed. Simplify the structure of compound piece, the shaping of being convenient for.
Furthermore, the diamond layer comprises a diamond base layer and a cutting edge tooth layer, the substrate combining surface is arranged on the diamond base layer, the hard alloy filling body is arranged on the cutting edge tooth layer, the peripheral surface of the hard alloy filling body, the peripheral surface of the hard alloy substrate and the peripheral surface of the diamond base layer are cylindrical surfaces, and the projections of the peripheral surfaces of the hard alloy filling body, the hard alloy substrate and the diamond base layer on a plane perpendicular to the peripheral surface of the hard alloy substrate coincide. The diamond layer sets up by layers, and the structure is comparatively simple, and convenient processing reduces the processing cost.
Further, the hard alloy matrix is filled between the diamond cutting blade teeth through sintering. The bonding strength of the hard alloy filling body and the diamond cutting edge tooth is high.
Drawings
Fig. 1 is a schematic structural view of a self-sharpening diamond compact according to embodiment 1 of the present invention;
fig. 2 is a top view of a self-sharpening diamond compact of embodiment 1 of the present invention;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;
fig. 4 is a schematic structural view of a self-sharpening diamond compact according to embodiment 2 of the present invention;
fig. 5 is a cross-sectional view of a self-sharpening diamond compact of embodiment 2 of the present invention;
in fig. 1 to 3: 1-a cemented carbide substrate; 2-a diamond layer; 21-substrate bonding surface; 22-edge flank; 23-diamond cutting blade teeth; 24-a diamond-based layer; 3-a cemented carbide filler;
in fig. 4 to 5: 201-cemented carbide substrate; 202-a diamond-based layer; 203-cemented carbide filling bodies.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as 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 accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
The utility model discloses specific embodiment 1 of self-sharpening formula diamond compact:
as shown in fig. 1 to 3, the self-sharpening diamond compact includes a cemented carbide substrate 1 and a diamond layer 2, the diamond layer 2 has a substrate bonding surface 21 and a blade surface 22, the substrate bonding surface 21 is bonded to the cemented carbide substrate 1, the blade surface 22 is provided with a plurality of diamond cutting blades 23, and the diamond cutting blades 23 are used for cutting a formation. The diamond layer 2 includes a diamond-based layer 24 and a cutting-edge tooth layer.
The spacing between diamond cutting blades in the prior art reduces the strength of the cutting blade, particularly for elongated cutting blades, which are prone to chipping when cutting earth formations. In order to improve the strength of the cutting edge teeth, the utility model discloses a packing between the diamond cutting edge teeth 23 has carbide obturator 3, and in this embodiment, carbide obturator 3 fills into between the diamond cutting edge teeth 23 through the mode of sintering. The cemented carbide filling body 3 surrounds the diamond cutting tip 23 and surrounds the entire diamond layer 2. The outer peripheral surface of the cemented carbide filler 3 is a cylindrical surface and has a radius equal to that of the outer peripheral surface of the cemented carbide base 1.
The hard alloy filling body 3 can protect the diamond cutting edge teeth 23, the end parts of the diamond cutting edge teeth 23 are only exposed, when the diamond layer 2 cuts a stratum, the hardness of the hard alloy filling body 3 is lower than that of diamond, the hard alloy filling body 3 is quickly worn, the diamond cutting edge teeth 23 are exposed, meanwhile, the hard alloy filling body 3 which is not worn can still protect the diamond cutting edge teeth 23, and the strength of the diamond cutting edge teeth 23 is improved.
The utility model discloses a from sharp formula diamond compact's cutting edge tooth buries in carbide obturator 3, and during compound piece cutting stratum, carbide obturator 3 is ground and is made diamond cutting edge tooth 23 expose, cuts the stratum. After the diamond cutting edge teeth are worn, the hard alloy filling body 3 is gradually worn, and the sharpness and good cutting capability of the diamond cutting edge teeth 23 are always kept.
The utility model discloses the embodiment 2 of self-sharpening diamond compact, the structure of self-sharpening diamond compact in this embodiment only lies in with the difference of above-mentioned embodiment, as shown in fig. 4 and fig. 5, in this embodiment, carbide filler 203 sets up at the cutting edge tooth layer, the outer peripheral face of diamond-based layer 202, the outer peripheral face of carbide base member 201, the outer peripheral face of carbide filler 203 are face of cylinder and radius equal, simplify the structure of compound piece, the shaping is simpler
The utility model discloses from sharp formula diamond compact's embodiment 3, the difference of sharp formula diamond compact's structure and above-mentioned embodiment in this embodiment only lies in, and in this embodiment, outlying diamond cutting sword tooth is in the border department of diamond layer, and the part of outlying diamond cutting sword tooth exposes outside the carbide packing body this moment.
The utility model discloses sharp formula diamond compact's embodiment 4, the structure of sharp formula diamond compact in this embodiment only lies in with the difference of above-mentioned embodiment, the outer peripheral face of carbide base member is the elliptic cylinder face, of course, in other embodiments, the outer peripheral face of carbide obturator, diamond-based layer's outer peripheral face can be the cylinder of other shapes, for example triangular prism cylinder face, quadrangular prism cylinder face, irregularly shaped's cylinder etc. three outer peripheral face is in with the projection coincidence of carbide base member outer peripheral face vertically plane.
In other embodiments, the cemented carbide filling body may have an irregular outer peripheral surface when not completely surrounding the diamond cutting tip. In other embodiments, the working surface of the diamond layer may be a convex hemispherical surface, the diamond layer is not layered, and the diamond cutting blade teeth are uniformly distributed on the working surface, however, in other embodiments, the shape of the diamond layer may be other, for example, any one of the diamond layers disclosed in application publication No. CN110500039A, and the diamond cutting blade teeth on the diamond layer may also take the form of cone teeth, spherical teeth, etc.
The utility model discloses the concrete embodiment of drill bit, drill bit include the brill body and fix the diamond compact piece on the brill body, diamond compact piece's structure and the arbitrary concrete embodiment of the aforesaid diamond compact piece's of self-sharpening structure the same, specifically no longer describe any more.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A self-sharpening diamond compact, comprising:
a cemented carbide substrate (1);
a diamond layer (2) having a substrate bonding surface (21) bonded to the cemented carbide substrate (1) and a blade tooth surface (22), the blade tooth surface (22) being provided with a plurality of diamond cutting blade teeth (23);
it is characterized in that the self-sharpening diamond compact further comprises:
and the hard alloy filling body (3) is filled between the diamond cutting edge teeth (23), and the hardness of the hard alloy filling body (3) is less than that of the diamond layer (2).
2. A self-sharpening diamond compact according to claim 1, wherein the diamond cutting teeth (23) are all within a cemented carbide filler body (3).
3. A self-sharpening diamond compact according to claim 2, characterized in that the diamond layer (2) is located inside the cemented carbide filler (3), and the outer peripheral surface of the cemented carbide filler (3) and the outer peripheral surface of the cemented carbide substrate (1) are both cylindrical surfaces, and their projections on a plane perpendicular to the outer peripheral surface of the cemented carbide substrate (1) coincide.
4. The self-sharpening diamond compact according to claim 2, wherein the diamond layer (2) comprises a diamond base layer (24) and a cutting-edge tooth layer, the base bonding surface (21) is arranged on the diamond base layer (24), the cemented carbide filler (3) is arranged on the cutting-edge tooth layer, the outer peripheral surface of the cemented carbide filler (3), the outer peripheral surface of the cemented carbide base body (1) and the outer peripheral surface of the diamond base layer are all cylindrical surfaces, and the projections of the outer peripheral surfaces of the three on a plane perpendicular to the outer peripheral surface of the cemented carbide base body (1) are overlapped.
5. A self-sharpening diamond compact according to claim 1, 2, 3 or 4, characterized in that the cemented carbide filler body (3) is filled between the diamond cutting teeth (23) by sintering.
6. The drill bit, including boring the body and fixing the diamond compact piece on boring the body, the diamond compact piece includes:
a cemented carbide substrate (1);
a diamond layer (2) having a substrate bonding surface (21) bonded to the cemented carbide substrate (1) and a blade tooth surface (22), the blade tooth surface (22) being provided with a plurality of diamond cutting blade teeth (23);
it is characterized in that the diamond compact further comprises:
and the hard alloy filling body (3) is filled between the diamond cutting edge teeth (23), and the hardness of the hard alloy filling body (3) is less than that of the diamond layer (2).
7. The drill bit according to claim 6, characterized in that the diamond cutting edge teeth (23) are each in a cemented carbide filling body (3).
8. The drill bit according to claim 7, characterized in that the diamond layer (2) is arranged in the cemented carbide filling body (3), and the outer peripheral surface of the cemented carbide filling body (3) and the outer peripheral surface of the cemented carbide base body (1) are both cylindrical surfaces, and the projections of the two on a plane vertical to the outer peripheral surface of the cemented carbide base body (1) are coincident.
9. The drill bit according to claim 7, wherein the diamond layer (2) comprises a diamond base layer (24) and a cutting edge tooth layer, the substrate bonding surface (21) is arranged on the diamond base layer (24), the hard alloy filler (3) is arranged on the cutting edge tooth layer, the outer peripheral surface of the hard alloy filler (3), the outer peripheral surface of the hard alloy substrate (1) and the outer peripheral surface of the diamond base layer are all cylindrical surfaces, and the projections of the outer peripheral surfaces of the three on a plane perpendicular to the outer peripheral surface of the hard alloy substrate (1) are overlapped.
10. Drill bit according to claim 6 or 7 or 8 or 9, characterized in that the cemented carbide substrate (1) is packed between the diamond cutting teeth (23) by sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022522450.0U CN213478229U (en) | 2020-11-04 | 2020-11-04 | Self-sharpening diamond compact and drill bit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022522450.0U CN213478229U (en) | 2020-11-04 | 2020-11-04 | Self-sharpening diamond compact and drill bit |
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| CN213478229U true CN213478229U (en) | 2021-06-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114045422A (en) * | 2021-11-15 | 2022-02-15 | 株洲硬质合金集团有限公司 | Self-sharpening hard alloy and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114045422A (en) * | 2021-11-15 | 2022-02-15 | 株洲硬质合金集团有限公司 | Self-sharpening hard alloy and preparation method thereof |
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