CN219012492U - Diamond impregnated tooth composite drill bit - Google Patents
Diamond impregnated tooth composite drill bit Download PDFInfo
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- CN219012492U CN219012492U CN202222856929.7U CN202222856929U CN219012492U CN 219012492 U CN219012492 U CN 219012492U CN 202222856929 U CN202222856929 U CN 202222856929U CN 219012492 U CN219012492 U CN 219012492U
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Abstract
The utility model discloses a diamond impregnated tooth composite drill bit, which comprises a drill bit matrix, wherein the top of the drill bit matrix is provided with a cutter head, and the cutter head comprises a cutter head seat and a cutting surface formed at the top of the cutter head seat; the tool bit seat and the drill bit base are integrally formed; the cutting face comprises a plurality of cutting units, and a notch groove is formed between the adjacent cutting units; the cutting unit is matched with the cutter head cylinder body structure and comprises a cutting part and a crushing part, wherein the cutting part comprises two cutting edges, the two cutting blocks are respectively provided with a cutting edge surface, the cutting edges on the two cutting blocks are inclined edges on the same straight line, a clearance groove is formed between the two cutting blocks, and the crushing part is provided with diamond impregnated teeth with the top surface protruding upwards; the top surface of the diamond impregnated tooth is 2-3 mm higher than the top surface of the cutting edge. The utility model can effectively improve the drilling efficiency of the drill bit, enlarge the application range of the drill bit and different rock layers and prolong the service life of the drill bit through the combination of the grooves, the inclined blades and the diamond impregnated teeth.
Description
Technical Field
The utility model relates to a diamond-impregnated bit, in particular to a diamond-impregnated composite bit suitable for soft to medium hard stratum.
Background
In the prior art, for geological exploration, drilling, boring and sampling operations on hard rock layers in basic engineering such as water conservancy and hydropower and the like are mainly realized by using a diamond drill bit. Aiming at the rock layers with alternating hardness and varying variability, each drill bit manufacturer generally adopts 5-6 types of drill bits with different wear resistance carcasses and various lip surface shapes in order to ensure that the drill bits and the stratum have better adaptability, which brings inconvenience to the drill bit manufacturer and drill bit users, the manufacturer needs to process the drill bits with various carcasses hardness and various lip surface shapes, and the user needs to stop drilling and replace the drill bits aiming at different geological layers, thereby influencing the efficiency.
For the above reasons, the applicant's prior application discloses a layered diamond-impregnated drill bit (ZL 02279738.6) which is of a sleeve-like structure as a whole and comprises a base body, a non-working layer, and a working layer connected with the base body through the non-working layer, wherein the working layer is composed of a plurality of tine forming layers and a plurality of groove forming layers, the tine forming layers are distributed at intervals with the groove forming layers, and the tine forming layers and the lower parts of the groove forming layers form a complete plane together. The layered drill bit structure can enable the drill bit to automatically form sharp teeth and grooves in the working process of contacting with rock stratum, and the sharp teeth are formed, so that the drill bit becomes sharper, the drilling efficiency can be improved, and the layered drill bit is a broad-spectrum drill bit with high drilling speed, long service life and wide application range. However, the tine forming layer structure of this drill is relatively poor in stability, and has a short service life in practical use.
Disclosure of Invention
The technical problem solved by the utility model is to provide a diamond impregnated composite drill bit which can be used for solving the defects in the technical background.
The technical problems solved by the utility model are realized by adopting the following technical scheme:
the diamond impregnated tooth composite drill bit comprises a drill bit base body, wherein a cutter head is arranged at the top of the drill bit base body, and the cutter head is of a cylinder structure and comprises a cutter head seat and a cutting surface formed at the top of the cutter head seat;
the tool bit seat and the drill bit matrix are integrally formed;
the cutting face comprises a plurality of cutting units, and a notch groove is formed between the adjacent cutting units; the cutting unit is matched with the cutter head cylinder body structure and comprises a cutting part and a crushing part, wherein the cutting part comprises two independent cutting blocks, the two cutting blocks are respectively provided with a cutting edge, the cutting edges on the two cutting blocks are inclined edges on the same straight line, a clearance groove is formed between the two cutting blocks, and the crushing part is provided with diamond impregnated teeth with the top surface protruding upwards;
the top surface of the diamond impregnated tooth is 2-3 mm higher than the top surface of the cutting edge.
As a further limitation, the tool bit seat and the drill bit base are integrally formed by No. 45 steel.
As a further limitation, the lower part of the bit body is formed with a fitting portion, and the bit body is coupled to a drilling apparatus for driving the bit body to rotate by the fitting portion.
As further limitation, the inner diameter corresponding to the section of the cylindrical structure of the cutter head is circular, the outer diameter is regular quadrangle, and transition arc surfaces are formed at the positions of four right-angle sides corresponding to the cutter head cylindrical structure;
the diamond impregnated teeth are formed at the middle points of the four sides of the right quadrangle corresponding to the four corner positions of the section of the cutter head cylinder;
the cutting edge is used as an oblique edge, and an included angle between the edge surface of the cutting edge and a tangent line of the circular inner diameter in the cutter head cylinder body is an acute angle.
As a further limitation, the sum of the lengths of the notch grooves on the section of the corresponding barrel body of the cutter head is 1/8-1/5 of the circumference of the section of the barrel body of the cutter head.
By way of further limitation, the diamond-impregnated tooth has a carcass hardness greater than 40HRC and the cutting edge has a carcass hardness less than the carcass hardness of the diamond-impregnated tooth.
The beneficial effects are that: according to the diamond impregnated tooth composite drill bit, structural stress is optimized by carrying out structural analysis on the drill bit, the contact area between the cutting edge part and a material to be drilled and cut is reduced by widening and matching the cutting edge with the groove between the two cutting edges, so that the purposes of reducing drilling and cutting friction force, increasing chip removal and cooling capacity are achieved, the cutting edge is arranged as an inclined edge, the stress of the cutting edge surface can be optimized, the pre-impact of the diamond impregnated tooth on the material to be drilled and cut can be effectively reduced, the problem that the cutting edge surface which is easy to appear due to the adoption of a straight edge design is easy to collapse and damage the high-hardness material is avoided, and the sharpness of the drill bit can be ensured, so that the use safety of the drill bit is ensured, and the service life of the drill bit is prolonged.
Drawings
FIG. 1 is a schematic diagram of a preferred embodiment of the present utility model.
Wherein: 1. a notch groove; 2. an outer cutting block; 3. a clearance groove; 4. a facet; 5. an inner side cutting block; 6. diamond impregnated teeth.
Detailed Description
The utility model is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the utility model easy to understand.
Referring to a preferred embodiment of a diamond impregnated composite drill bit shown in fig. 1, in this embodiment, a main body of the diamond impregnated composite drill bit is a drill bit base body formed by 45 # steel, and an assembly part is formed at a lower part of the drill bit base body, where the assembly part may be a standard part or a non-standard part modified according to actual drilling equipment requirements, and only needs to be capable of assembling and connecting the drill bit base body on corresponding drilling equipment and realizing a rotary drilling function.
The top of the drill bit matrix forms a tool bit seat, the tool bit seat is used for assembling a tool bit part for drilling, the overlooking pattern of the drill bit matrix at the tool bit part is shown as the figure, the whole tool bit part is of a cylinder structure as the figure, the inner diameter corresponding to the section of the cylinder structure is circular, the outer diameter is regular quadrangle, and the transition arc surface is formed at the positions of four right-angle sides corresponding to the tool bit cylinder.
The tool bit part is integrally formed on the drill bit matrix and integrally formed with the drill bit matrix, and corresponding grooves are formed on the regular quadrilateral outer diameter and the round inner diameter of the tool bit part so as to form a combined cutting structure for drilling. The combined cutting structure comprises diamond impregnated teeth 6 and a cutting block combination, wherein one diamond impregnated tooth 6 is attached to one cutting block combination, and a cutting unit is formed. In this embodiment, the number of the notch grooves 1 is eight, the sum of the lengths of the eight notch grooves 1 on the section of the cylinder body is 1/6 of the perimeter of the section of the cylinder body of the tool bit, the notch grooves 1 are chip removal and force unloading structures, and meanwhile, the contact area between the combined cutting structure and the drilling and cutting material can be effectively reduced, so that the purposes of reducing the drilling and cutting friction force, increasing the chip removal and cooling capacity are achieved, the sharpness of the tool bit and the use safety can be improved, and the problem that the diamond drill bit is easy to damage due to the structural defect of the tool bit is effectively solved.
In this embodiment, the diamond-impregnated teeth 6 are correspondingly formed at four angular positions corresponding to the regular quadrangle and at the middle points of the four sides on the annular surface between the outer diameter of the regular quadrangle and the inner diameter of the circle, the lengths of the diamond-impregnated teeth 6 correspondingly formed at the four angular positions of the outer diameter of the regular quadrangle are longer than those of the diamond-impregnated teeth 6 correspondingly formed at the middle points of the four sides corresponding to the outer diameter of the regular quadrangle, so that the diamond-impregnated teeth 6 have better assembly gaps at different positions on the cylinder, and gaps are reserved between the diamond-impregnated teeth 6 and the inner side and the outer side of the drill bit matrix to serve as chip removal spaces.
Each cutting block combination comprises an outer cutting block 2 and an inner cutting block 5, and the outer cutting block 2 and the inner cutting block 5 at different positions on the annular surface of the cylinder body are customized according to the cylinder body structure, so that after the cutting block combination is formed on a drill bit matrix according to patterns, the outer side surface of the outer cutting block 2 is matched with the square outer diameter of the cylinder body, and the inner side surface of the inner cutting block 5 is matched with the circular inner diameter of the cylinder body (namely, the patterns are shown). The outer side cutting block 2 and the inner side cutting block 5 are respectively provided with a cutting edge surface 4, the cutting edge surfaces 4 formed on the outer side cutting block 2 and the inner side cutting block 5 on the same cutting block combination are positioned on the same straight line, the straight line is oblique line, and the included angle alpha between the straight line and the tangent line of the circular inner diameter of the cutter head barrel structure is 48 degrees.
The outer cutting block 2 and the inner cutting block 5 together form a cutting part, and a clearance groove 3 is formed between the outer cutting block 2 and the inner cutting block 5, and in this embodiment, the clearance grooves 3 corresponding to the eight cutting block combinations are located on the same torus. The clearance groove 3 can change the stress of the inner side and the outer side of the outer side cutting block 2 and the inner side cutting block 5 so as to reduce drilling resistance, increase chip removal effect and heat dissipation effect, and the inclined and in-line cutting edge surface 4 can throw rock scraps along the oblique line direction of the cutting edge surface 4 in the rock crushing process, thereby being beneficial to end face heat dissipation and timely discharge of the rock scraps.
The diamond impregnated tooth 6 is formed as a breaking part after the cutting part and is propped against the cutting part, the lower part of the diamond impregnated tooth 6 is of a rectangular block structure, and the upper part is of an arc top structure protruding upwards.
The diamond impregnated composite drill bit of the embodiment ensures that the cutting part on the same cutting unit is positioned on the feed side and the crushing part is positioned on the discharge side during assembly.
The diamond impregnated teeth 6, the outer side cutting blocks 2 and the inner side cutting blocks 5 are formed by adopting a powder metallurgy process, are formed by hot pressing and sintering after being uniformly mixed by metal powder and diamond particles, and the hardness of the diamond impregnated teeth 6, the outer side cutting blocks 2 and the inner side cutting blocks 5 formed by the corresponding process is adjusted by adjusting the process and the crystal grain morphology of the used diamond particles, so that the hardness of the matrix of the diamond impregnated teeth 6 is greater than 40HRC, and the hardness of the matrix of the corresponding outer side cutting blocks 2 and the inner side cutting blocks 5 is smaller than the hardness of the matrix of the diamond impregnated teeth 6, thereby obtaining better crushed rock using effect.
The diamond impregnated tooth 6, the outer side cutting block 2 and the inner side cutting block 5 are embedded on the regular quadrilateral outer diameter and the round inner diameter of the tool bit part after the matrix is sintered and molded, and corresponding grooves are molded to finish assembly; the assembly ensures that the cutting faces 4 of the outer cutting block 2 and the inner cutting block 5 are in the same plane, and the vertex of the diamond impregnated tooth 6 is 2-3 mm higher than the vertex of the cutting face 4.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be appreciated by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present utility model. Furthermore, it is to be understood that various changes, modifications and/or variations may be made by those skilled in the art after reading the technical content of the present utility model, and that all such equivalents are intended to fall within the scope of protection defined in the claims appended hereto.
Claims (8)
1. The diamond impregnated tooth composite drill bit is characterized by comprising a drill bit base body, wherein a cutter head is arranged at the top of the drill bit base body, and the cutter head is of a cylinder structure and comprises a cutter head seat and a cutting face formed at the top of the cutter head seat;
the tool bit seat and the drill bit matrix are integrally formed;
the cutting face comprises a plurality of cutting units, and a notch groove is formed between the adjacent cutting units; the cutting unit is matched with the cutter head cylinder body structure and comprises a cutting part and a crushing part, wherein the cutting part comprises two independent cutting blocks, the two cutting blocks are respectively provided with a cutting edge, the cutting edges on the two cutting blocks are inclined edges on the same straight line, a clearance groove is formed between the two cutting blocks, and the crushing part is provided with diamond impregnated teeth with the top surface protruding upwards;
the top surface of the diamond impregnated tooth is 2-3 mm higher than the top surface of the cutting edge surface.
2. The diamond impregnated composite drill bit according to claim 1, wherein the bit holder and the drill bit base are integrally formed of 45 gauge steel.
3. The diamond-impregnated composite drill bit according to claim 1, wherein the lower part of the drill bit base body is formed with an assembling part, and the drill bit base body is assembled and connected with a drilling device for driving the drill bit base body to rotate through the assembling part.
4. The diamond-impregnated composite drill bit according to claim 1, wherein the cross section of the cylindrical structure of the tool bit has a circular inner diameter and a regular quadrilateral outer diameter, and transition arc surfaces are formed at the four right-angle sides of the cylindrical structure of the tool bit.
5. The diamond-impregnated composite drill bit according to claim 4, wherein the diamond-impregnated teeth are formed in the cross section of the bit barrel corresponding to four angular positions of a regular quadrilateral and a midpoint position of four sides.
6. The diamond impregnated composite drill bit according to claim 4, wherein the angle between the cutting surface and the tangent to the circular inside diameter of the bit barrel is acute.
7. The diamond impregnated composite drill bit according to claim 1, wherein the sum of lengths of the notch grooves on the corresponding barrel section of the tool bit is 1/8-1/5 of the circumference of the barrel section of the tool bit.
8. The diamond-impregnated composite drill bit according to claim 1, wherein the diamond-impregnated tooth has a matrix hardness greater than 40HRC and the blade face has a matrix hardness less than the matrix hardness of the diamond-impregnated tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222856929.7U CN219012492U (en) | 2022-10-28 | 2022-10-28 | Diamond impregnated tooth composite drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222856929.7U CN219012492U (en) | 2022-10-28 | 2022-10-28 | Diamond impregnated tooth composite drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219012492U true CN219012492U (en) | 2023-05-12 |
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ID=86247605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222856929.7U Active CN219012492U (en) | 2022-10-28 | 2022-10-28 | Diamond impregnated tooth composite drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219012492U (en) |
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2022
- 2022-10-28 CN CN202222856929.7U patent/CN219012492U/en active Active
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