High performance indexable drill insert combination and indexable drill
By designing a high-performance indexable drill bit insert assembly, the problem of poor tip offset performance of indexable inserts was solved, achieving better force balance and cutting force adjustment, and extending the service life of the inserts.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG XINXING TOOLS CO LTD
- Filing Date
- 2023-06-21
- Publication Date
- 2026-05-12
AI Technical Summary
The poor tip offset performance of existing indexable inserts results in poor force balance performance of indexable drill bits.
Design a high-performance indexable drill bit insert assembly, including a first indexable insert and a second indexable insert, with the tips located in the same plane, the cutting edge and the straight edge having unequal lengths, the side surface being a parallelogram shape, and rounded corner edges and grooves being provided to improve the offset performance and force balance of the insert.
It improves the tip offset performance and force balance performance of indexable inserts, extends the service life of the inserts, and increases the adjustment range of cutting force.
Smart Images
Figure CN116748570B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of drill bit technology, specifically to a high-performance indexable drill bit insert assembly and an indexable drill bit. Background Technology
[0002] Indexable drill bits are a type of drill bit that uses indexable cutting tools. They have advantages such as good indexing performance and long service life, and are widely used in the field of hole machining.
[0003] To increase the number of indexable inserts, both ends of the indexable inserts are generally equipped with cutting sections. However, due to the poor offset performance of the cutting tip of the indexable insert, when different ends of the indexable insert are used for cutting, the force balance performance of the indexable drill bit is easily poor. Summary of the Invention
[0004] To address the aforementioned technical problems, this invention provides a high-performance indexable drill bit insert assembly and an indexable drill bit, wherein the offset performance of the tip of the indexable insert is good.
[0005] To solve the above problems, the technical solution provided by the present invention is as follows:
[0006] A high-performance indexable drill bit insert assembly includes a first indexable insert and a second indexable insert;
[0007] The first indexable insert includes a first cutter body, a plurality of first cutting edges disposed at one end of the first cutter body, a plurality of first cutting tips disposed at one end of the first cutter body, and a plurality of first straight cutting edges disposed at one end of the first cutter body, wherein the first cutting tips are located between the first cutting edges and the first straight cutting edges, and the length of the first cutting edges is greater than the length of the first straight cutting edges.
[0008] The second indexable insert includes a second cutter body, a plurality of second cutting edges and a plurality of third cutting edges respectively disposed at both ends of the second cutter body, a plurality of second cutting tips and a plurality of third cutting tips respectively disposed at both ends of the second cutter body, and a plurality of second straight edges and a plurality of third straight edges respectively disposed at both ends of the second cutter body, wherein the second cutting tips are located between the second cutting edges and the second straight edges, the third cutting tips are located between the third cutting edges and the third straight edges, the lengths of the second cutting edges and the second straight edges are not equal, the lengths of the third cutting edges and the third straight edges are not equal, and the side surface formed by the second cutting tips and the third cutting tips is configured as a first side surface, the shape of the first side surface being a parallelogram;
[0009] The first and second or third cutting tips are located in the same plane.
[0010] Optionally, the first indexable insert further includes:
[0011] A plurality of first corner rounded edges are provided at one end of the first cutter body, the first corner rounded edges being located between the first straight edge and the first cutting edge.
[0012] Optionally, the first indexable blade may further include a first groove at one end of the first blade body.
[0013] Optionally, the first groove is an annular closed body.
[0014] Optionally, the second indexable insert further includes:
[0015] Several second corner rounded edges and several third corner rounded edges are respectively provided at both ends of the second cutter body. The second corner rounded edges are located between the second cutting edge and the second straight edge, and the third corner rounded edges are located between the third cutting edge and the third straight edge.
[0016] Optionally, the second indexable blade may further include a second groove and a third groove respectively disposed at both ends of the second blade body.
[0017] Optionally, both the second groove and the third groove are annular closed bodies.
[0018] An indexable drill bit, comprising a high-performance indexable drill bit insert assembly, and further comprising:
[0019] Drill bit body;
[0020] A shank connected to one end of the drill bit body;
[0021] Chip removal grooves provided on the drill bit body;
[0022] The first indexable insert is detachably connected to one side of the other end of the drill bit body, and the second indexable insert is detachably connected to the other side of the other end of the drill bit body. The area of one end of the first indexable insert is larger than the area of the other end of the first indexable insert. The axis of the first indexable insert is parallel to the axis of the drill bit body. The axis of the second indexable insert is at a first angle to the axis of the drill bit body. The distance between the axis of the first indexable insert and the axis of the drill bit body is smaller than the distance between the axis of the second indexable insert and the axis of the drill bit body.
[0023] Optionally, the first angle is in the range of 5-15°.
[0024] Optionally, the connection between the drill bit body and the shank is an integral molding connection.
[0025] Compared with the prior art, the technical solution provided by this invention has the following advantages: the offset performance of the tip of its indexable insert is good. Attached Figure Description
[0026] Figure 1 This is one of the structural schematic diagrams of an indexable drill bit proposed in an embodiment of the present invention;
[0027] Figure 2 This is a second schematic diagram of the structure of an indexable drill bit proposed in an embodiment of the present invention;
[0028] Figure 3 This is one of the structural schematic diagrams of a high-performance indexable drill bit assembly proposed in an embodiment of the present invention;
[0029] Figure 4 This is a second schematic diagram of a high-performance indexable drill bit assembly proposed in an embodiment of the present invention;
[0030] Figure 5 This is the third schematic diagram of a high-performance indexable drill bit assembly proposed in an embodiment of the present invention;
[0031] Figure 6 This is a schematic diagram of the structure of the first indexable blade proposed in an embodiment of the present invention;
[0032] Figure 7 This is a schematic diagram of the structure of the second indexable blade proposed in an embodiment of the present invention;
[0033] In the figure: 1. First indexable insert; 11. First cutter body; 12. First cutting edge; 13. First cutting tip; 14. First straight cutting edge; 15. First rounded corner cutting edge; 16. First groove; 2. Second indexable insert; 21. Second cutter body; 22. Second cutting edge; 23. Third cutting edge; 24. Second cutting tip; 25. Third cutting tip; 26. Second straight cutting edge; 27. Third straight cutting edge; 28. Second rounded corner cutting edge; 29. Third rounded corner cutting edge; 210. Second groove; 220. Third groove; 230. First side surface; 3. Drill body; 4. Shank; 5. Chip removal groove; 6. First angle; 7. First rake angle; 8. Second rake angle; 9. Axis. Detailed Implementation
[0034] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.
[0035] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. The terms "first," "second," etc., used in this invention are for the convenience of describing the technical solutions of the invention and have no specific limiting effect; they are all general terms and do not constitute a limitation on the technical solutions of the invention. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict, all of which are within the scope of protection claimed by this invention.
[0036] Example 1
[0037] Combined with appendix Figure 1-7 This embodiment provides a high-performance indexable drill bit assembly, including a first indexable bit 1 and a second indexable bit 2;
[0038] like Figure 6 The first indexable insert 1 includes a first cutter body 11, a plurality of first cutting edges 12 disposed at one end of the first cutter body 11, a plurality of first cutting tips 13 disposed at one end of the first cutter body 11, and a plurality of first straight cutting edges 14 disposed at one end of the first cutter body 11, wherein the first cutting tips 13 are located between the first cutting edges 12 and the first straight cutting edges 14, and the length of the first cutting edges 12 is greater than the length of the first straight cutting edges 14;
[0039] like Figure 7The second indexable insert 2 includes a second cutter body 21, a plurality of second cutting edges 22 and a plurality of third cutting edges 23 respectively disposed at both ends of the second cutter body 21, a plurality of second cutting tips 24 and a plurality of third cutting tips 25 respectively disposed at both ends of the second cutter body 21, and a plurality of second straight edges 26 and a plurality of third straight edges 27 respectively disposed at both ends of the second cutter body 21. The second cutting tips 24 are located between the second cutting edges 22 and the second straight edges 26, and the third cutting tips 25 are located between the third cutting edges 23 and the third straight edges 27. The lengths of the second cutting edges 22 and the second straight edges 26 are not equal, and the lengths of the third cutting edges 23 and the third straight edges 27 are not equal. The side surface formed by the second cutting tips 24 and the third cutting tips 25 is configured as a first side surface 230, and the shape of the first side surface 230 is a parallelogram.
[0040] The first cutting tip 13 and the second cutting tip 24 or the third cutting tip 25 are located in the same plane.
[0041] Specifically, the first cutter body 11 is used to support a plurality of first cutting edges 12 and a plurality of first cutting tips 13, etc.; the plurality of first cutting edges 12 are used for cutting. Since the plurality of first cutting edges 12 are located at one end of the first cutter body 11, it is convenient for the first indexable insert 1 to achieve single-sided indexability, thereby increasing the service life of the first indexable insert 1. The specific number of first cutting edges 12 is not limited, preferably four; the plurality of first cutting tips 13 are used for positioning; the plurality of first straight edges 14 have the same external structure as the plurality of first cutting edges 12, but the plurality of first straight edges 14 do not participate in cutting. Since the first cutting tips 13 are located between the first cutting edges 12 and the first straight edges 14, the length of the first cutting edges 12 is greater than the length of the first straight edges 14, which makes it easier to make the offset performance of the first cutting tips 13 better, and at the same time makes it easier to increase the adjustment range of the cutting force of the first indexable insert 1, thereby making the force balance performance of the first indexable insert 1 and the second indexable insert 2 better, which is beneficial to making the force balance performance of the indexable drill bit better;
[0042] The second cutter body 21 is used to support a plurality of second cutting edges 22, a plurality of third cutting edges 23, a plurality of second cutting edge portions 24, and a plurality of third cutting edge portions 25, etc.; the plurality of second cutting edges 22 and the plurality of third cutting edges 23 are used for cutting. Since the plurality of second cutting edges 22 and the plurality of third cutting edges 23 are respectively provided at both ends of the second cutter body 21, it is convenient for the second indexable insert 2 to achieve double-sided indexability, thereby increasing the service life of the second indexable insert 2. The specific number of second cutting edges 22 and third cutting edges 23 is not limited, but preferably three. The second indexable insert 2 has several second cutting edges 24 and several third cutting edges 25 used for positioning; several second straight cutting edges 26 and several second cutting edges 22 have the same external structure, but the second straight cutting edges 26 do not participate in cutting. Since the lengths of the second cutting edges 22 and the second straight cutting edges 26 are not equal, it facilitates good offset performance of the second cutting edges 24. When the length of the second cutting edge 22 is greater than the length of the second straight cutting edge 26, the adjustment range of the cutting force of the second indexable insert 2 is relatively large. When the length of the second cutting edge 22 is less than the length of the second straight cutting edge 26, the adjustment range of the cutting force is relatively large. When the cutting force adjustment range of the second indexable insert 2 is relatively small, but since the cutting force adjustment range of the first indexable insert 1 is relatively large, even if the cutting force adjustment range of the second indexable insert 2 is relatively small, it is still easy to make the force balance performance of the first indexable insert 1 and the second indexable insert 2 good. Therefore, no limitation is made on the length of the second cutting edge 22 and the length of the second straight edge 26 here. Similarly, no limitation is made on the length of the third cutting edge 23 and the length of the second straight edge 26. However, in order to increase the synchronicity when the second indexable insert 2 is double-sided, the shape of the first side 230 is a parallelogram. This means that no matter which side of the second indexable insert 2 is used for cutting, it is only necessary to rotate the second indexable insert 2 by the same angle to make the force balance performance of the first indexable insert 1 and the second indexable insert 2 good. The first cutting tip 13 and the second cutting tip 24 or the third cutting tip 25 are located in the same plane, which makes the positioning balance performance of the indexable drill bit good, and at the same time makes the force balance performance of the indexable drill bit good.
[0043] Furthermore, such as Figure 6 The first indexable blade 1 also includes:
[0044] A plurality of first corner rounded edges 15 are provided at one end of the first cutter body 11, the first corner rounded edges 15 being located between the first straight edge 14 and the first cutting edge 12.
[0045] Specifically, the first corner rounded edge 15 is used to remove the sharp edge of the first indexable blade 1, effectively preventing stress concentration in the first indexable blade 1.
[0046] Furthermore, the first indexable blade 1 also includes a first groove 16 located at one end of the first blade body 11.
[0047] Specifically, the first groove 16 is used for chip breaking, thereby reducing the size of the waste chips and thus facilitating the smoothness of chip removal of the indexable drill bit.
[0048] Furthermore, the first groove 16 is an annular closed body.
[0049] Specifically, the annular closed body facilitates an increase in the chip breaking tolerance of the first groove 16, thereby improving the chip breaking effect of the first groove 16.
[0050] Furthermore, such as Figure 7 The second indexable blade 2 also includes:
[0051] Several second corner rounded cutting edges 28 and several third corner rounded cutting edges 29 are respectively provided at both ends of the second cutter body 21. The second corner rounded cutting edges 28 are located between the second cutting edge 22 and the second straight cutting edge 26, and the third corner rounded cutting edges 29 are located between the third cutting edge 23 and the third straight cutting edge 27.
[0052] Specifically, the second corner rounded edge 28 and the third corner rounded edge 29 are both used to remove the sharp edges of the second indexable blade 2, effectively preventing stress concentration in the second indexable blade 2.
[0053] Furthermore, the second indexable blade 2 also includes a second groove 210 and a third groove 220 respectively provided at both ends of the second blade body 21.
[0054] Specifically, both the second groove 210 and the third groove 220 are used for chip breaking, thereby reducing the size of the waste chips and thus facilitating the smoothness of chip removal of the indexable drill bit.
[0055] Furthermore, both the second groove 210 and the third groove 220 are annular closed bodies.
[0056] Specifically, the annular closed body facilitates the addition of chip-reducing grooves in the second groove 210 and the third groove 220, thereby improving the chip-reducing effect of the second groove 210 and the third groove 220.
[0057] Example 2
[0058] Combined with appendix Figure 1-7 This embodiment provides an indexable drill bit, including a high-performance indexable drill bit insert assembly as described in Embodiment 1, and further comprising:
[0059] Drill bit body 3;
[0060] The shank 4 is connected to one end of the drill bit body 3;
[0061] Chip removal groove 5 is provided on the drill bit body 3;
[0062] The first indexable insert 1 is detachably connected to one side of the other end of the drill bit body 3, and the second indexable insert 2 is detachably connected to the other side of the other end of the drill bit body 3. The area of one end of the first indexable insert 1 is larger than the area of the other end of the first indexable insert 1. The axis 9 of the first indexable insert 1 and the drill bit body 3 are parallel. The axis 9 of the second indexable insert 2 and the drill bit body 3 have a first angle 6. The distance between the axis 9 of the first indexable insert 1 and the drill bit body 3 is smaller than the distance between the axis 9 of the second indexable insert 2 and the drill bit body 3.
[0063] Specifically, the drill body 3 is used to support the shank 4, chip groove 5, first indexable insert 1, and second indexable insert 2, etc.; the shank 4 is used to cooperate with relevant drilling equipment, thereby facilitating the cooperation between the indexable drill and relevant drilling equipment. The shank 4 can be a general shank, a right-angle shank, or a tone shank, etc.; the chip groove 5 is used for chip removal; since the area of one end of the first indexable insert 1 is larger than the area of the other end of the first indexable insert 1, it is convenient for the first indexable insert 1 to have a first cutting rake angle 7, thereby ensuring that the first indexable insert 1 can cut smoothly. Therefore, when installing the first indexable insert 1, it is only necessary to make the first indexable insert 1 and the axis 9 of the drill body 3 parallel. Since the second indexable insert 2 has several second cutting edges 22 and several third cutting edges 23 at its two ends, the second indexable insert 2 itself cannot have a second cutting rake angle 8. Therefore, by setting a first angle 6 between the axis 9 of the second indexable insert 2 and the drill body 3, the second indexable insert 2 generates a second cutting rake angle 8 through a specific installation method, thereby ensuring that the second indexable insert 2 can perform cutting smoothly. Since the distance between the axis 9 of the first indexable insert 1 and the drill body 3 is smaller than the distance between the axis 9 of the second indexable insert 2 and the drill body 3, it is convenient for the first indexable insert 1 to be used as the inner insert and the second indexable insert 2 to be used as the outer insert.
[0064] Furthermore, the first angle 6 ranges from 5 to 15°.
[0065] Specifically, the first angle 6 can be 5°, 10°, or 15°, etc.
[0066] Furthermore, the connection between the drill bit body 3 and the shank 4 is a one-piece molding connection.
[0067] Specifically, this facilitates increasing the overall integrity of the drill bit body 3 and the shank 4.
[0068] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A high-performance indexable drill bit assembly, characterized in that, Includes a first indexable insert and a second indexable insert; The first indexable insert includes a first cutter body, a plurality of first cutting edges disposed at one end of the first cutter body, a plurality of first cutting tips disposed at one end of the first cutter body, and a plurality of first straight cutting edges disposed at one end of the first cutter body, wherein the first cutting tips are located between the first cutting edges and the first straight cutting edges, and the length of the first cutting edges is greater than the length of the first straight cutting edges. The second indexable insert includes a second cutter body, a plurality of second cutting edges and a plurality of third cutting edges respectively disposed at both ends of the second cutter body, a plurality of second cutting tips and a plurality of third cutting tips respectively disposed at both ends of the second cutter body, and a plurality of second straight edges and a plurality of third straight edges respectively disposed at both ends of the second cutter body, wherein the second cutting tips are located between the second cutting edges and the second straight edges, the third cutting tips are located between the third cutting edges and the third straight edges, the lengths of the second cutting edges and the second straight edges are not equal, the lengths of the third cutting edges and the third straight edges are not equal, and the side surface formed by the second cutting tips and the third cutting tips is configured as a first side surface, the shape of the first side surface being a parallelogram; Wherein, the first blade tip and the second blade tip or the third blade tip are located in the same plane; The first indexable blade further includes: A plurality of first corner rounded edges are provided at one end of the first cutter body, and the first corner rounded edges are located between the first straight edge and the first cutting edge; The second indexable insert also includes: Several second corner rounded edges and several third corner rounded edges are respectively provided at both ends of the second cutter body. The second corner rounded edges are located between the second cutting edge and the second straight edge, and the third corner rounded edges are located between the third cutting edge and the third straight edge.
2. The high-performance indexable drill bit assembly according to claim 1, characterized in that, The first indexable blade also includes a first groove at one end of the first blade body.
3. The high-performance indexable drill bit assembly according to claim 2, characterized in that, The first groove is an annular closed body.
4. The high-performance indexable drill bit assembly according to claim 1, characterized in that, The second indexable blade also includes a second groove and a third groove respectively located at both ends of the second blade body.
5. The high-performance indexable drill bit assembly according to claim 4, characterized in that, Both the second groove and the third groove are annular closed bodies.
6. An indexable drill bit, characterized in that, The high-performance indexable drill bit assembly as described in any one of claims 1-5 further includes: Drill bit body; A shank connected to one end of the drill bit body; Chip removal grooves provided on the drill bit body; The first indexable insert is detachably connected to one side of the other end of the drill bit body, and the second indexable insert is detachably connected to the other side of the other end of the drill bit body. The area of one end of the first indexable insert is larger than the area of the other end of the first indexable insert. The axis of the first indexable insert is parallel to the axis of the drill bit body. The axis of the second indexable insert is at a first angle to the axis of the drill bit body. The distance between the axis of the first indexable insert and the axis of the drill bit body is smaller than the distance between the axis of the second indexable insert and the axis of the drill bit body.
7. The indexable drill bit according to claim 6, characterized in that, The first angle is in the range of 5-15°.
8. The indexable drill bit according to claim 6, characterized in that, The connection between the drill bit body and the shank is a one-piece molding connection.