A composite drill bit of a whole cemented carbide

Abstract

The application relates to a composite drill whole hard alloy composite drill applied in the cutter field, which comprises a cutter body, an installation groove is formed in the cutter body, a drill head matched with the installation groove is arranged in the installation groove, the drill head is used for drilling a composite hole, a cutting part is arranged on the drill head, the cutting part extends out of the cutter body, and a blade for boring a composite hole is arranged on the cutter body. The application has the technical effect that when the composite hole needs to be processed, the drill head is used for drilling the composite hole, the blade on the cutter body processes the boring of the composite hole in the rotating process of the cutter body, the synchronous processing of the composite hole with multiple diameters is realized, the operator does not need to manually replace the cutter, the mechanical beat of the replacement of the cutter in the traditional processing mode is saved, the processing procedure of the composite hole is optimized, and the processing efficiency of the composite hole is improved.

Description

Technical Field

[0001] This application relates to the field of cutting tool technology, and in particular to a composite drill bit made of solid carbide. Background Technology

[0002] A drill bit is a rotating tool with a cutting capability at its tip. It is generally made of materials such as carbon steel or high-speed steel, which are milled or rolled, then quenched, tempered, and ground. It is mainly used for drilling holes in metals or other materials.

[0003] When machining composite holes, since the drilling diameter at the front end of the composite hole and the boring diameter at the rear end are quite different, the relevant technology first uses a carbide drill bit to drill the front end of the composite hole. After the front end is drilled, the operator changes the tool and performs a hole enlargement process on the composite hole, thereby realizing the boring of the rear end of the composite hole.

[0004] During the processing of the aforementioned composite holes, operators need to change tools to achieve drilling at the front end and boring at the rear end of the composite holes. When there are a large number of composite holes to be processed on the workpiece, it results in wasted mechanical cycle time and low production efficiency. Summary of the Invention

[0005] To address the problem in related technologies where operators need to change cutting tools to perform drilling at the front end and boring at the rear end of a composite hole, resulting in wasted machine cycle time and low production efficiency when there are many composite holes to be machined on the workpiece, this application provides a composite drill bit made of solid carbide, which adopts the following technical solution: It includes a tool body with a mounting groove, a drill bit matching the mounting groove, and the drill bit is used for drilling composite holes. The drill bit has a cutting section extending out of the tool body, and the tool body has inserts for boring composite holes.

[0006] In one specific implementation, the drill bit is provided with a chip removal groove, and the cutter body is provided with a chip receiving groove at one end facing the drill bit, and the chip removal groove and the chip receiving groove are connected.

[0007] In one specific implementation, the chip-collecting groove has a placement groove on its wall that matches the blade, and the blade is placed in the placement groove.

[0008] In one specific implementation, the outer edge of the drill bit is provided with a clearance groove corresponding to the placement groove, and the cutting blade is inserted into the clearance groove.

[0009] In one specific implementation, the blade body is provided with a liquid injection groove, and the bottom of the liquid injection groove is provided with a threaded hole communicating with the mounting groove. An adjusting screw that matches the threaded hole is threadedly connected inside the threaded hole.

[0010] In one specific implementation scheme, the cutting part is provided with a first internal cooling hole, and the adjusting screw is provided with a cooling injection hole that communicates with both the first internal cooling hole and the liquid injection groove.

[0011] In one specific implementation scheme, a second internal cooling hole communicating with the liquid injection tank is provided on the tank wall of the chip collection tank.

[0012] In one specific implementation, the outer edge of the drill bit is provided with a mounting flat, the cutter body is provided with a fixing groove, and a set screw that matches the fixing groove is threaded into the fixing groove. The end of the set screw facing the drill bit is pressed against the mounting flat.

[0013] In one specific implementation, the cutting part is provided with a chip guide groove that communicates with the chip removal groove.

[0014] In one specific implementation, a retrieval slot is provided on the wall of the placement slot.

[0015] In summary, this application has the following beneficial technical effects: when it is necessary to process composite holes, the drill bit is used to drill the composite holes, and the cutting tool on the tool body performs boring of the composite holes during the rotation of the tool body, realizing the synchronous processing of multiple diameter holes in composite holes. There is no need for operators to manually change tools, saving the mechanical cycle of tool changing in traditional processing methods, optimizing the processing steps of composite holes, and improving the processing efficiency of composite holes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0017] Figure 2 This is a schematic diagram illustrating the receiving of the adjusting screw in an embodiment of this application.

[0018] Figure 3 yes Figure 1 Enlarged diagram of point A in the middle.

[0019] Reference numerals: 1. Tool body; 2. Mounting slot; 3. Drill bit; 4. Blade; 5. Chip removal groove; 6. Chip collection groove; 7. Placement groove; 8. Clearance groove; 9. Liquid injection groove; 10. Threaded hole; 11. Adjusting screw; 12. First internal cooling hole; 13. Cooling injection hole; 14. Second internal cooling hole; 15. Mounting flat; 16. Fixing groove; 17. Set screw; 18. Chip guide groove; 19. Pick-up groove. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0021] This application discloses a composite drill bit made of integral cemented carbide.

[0022] Reference Figure 1 and Figure 2 The composite drill bit 3, made of solid carbide, includes a cutter body 1 with a mounting groove 2. A drill bit 3, matching the size of the mounting groove 2, is installed in the mounting groove 2. The drill bit 3 is used to drill composite holes. A cutting section is provided on the drill bit 3, extending out of the cutter body 1. An insert 4 for boring the composite hole is provided on the cutter body 1. In this embodiment, the drill bit 3 is a non-standard solid carbide drill bit, the cutter body 1 is a steel indexable cutter body 1, and the number of inserts 4 is set to two, with the inserts 4 arranged in a triangular shape. Therefore, when machining composite holes, the drill bit 3 is used for drilling the composite holes, and the inserts 4 on the cutter body 1 bore the composite holes during the rotation of the cutter body 1, achieving simultaneous machining of multiple diameter composite holes. This eliminates the need for manual tool changes, saving the mechanical cycle time of tool changes in traditional machining methods, optimizing the machining process of composite holes, and improving the machining efficiency of composite holes.

[0023] Reference Figure 1 and Figure 2 The drill bit 3 has a chip removal groove 5, and the cutting part has a chip guide groove 18 that communicates with the chip removal groove 5. The chip guide groove 18 guides the chip discharge, optimizes the chip discharge path, and reduces friction and heat accumulation during the cutting process. The end of the cutter body 1 facing the drill bit 3 has a chip receiving groove 6, which communicates with the chip removal groove 5. The chip removal groove 5 and the chip receiving groove 6 are used to discharge the chips generated during the cutting process, extending the service life of the drill bit 3. A placement groove 7 matching the size of the cutting insert 4 is formed on the groove wall of the chip receiving groove 6. The cutting insert 4 is placed in the placement groove 7, which limits the position of the cutting insert 4, reducing the possibility of the cutting insert 4 shifting. In this embodiment, the cutting insert 4 can be connected to the cutter body 1 by screw installation. A retrieval groove 19 is formed on the groove wall of the placement groove 7, making it easy for operators to remove the cutting insert 4 when replacing or repairing it.

[0024] Reference Figure 1 and Figure 3 The outer edge of the drill bit 3 is provided with a clearance groove 8 corresponding to the position of the placement groove 7. The cutting blade 4 is partially inserted into the clearance groove 8. The clearance groove 8 forms a small notch that can accommodate the cutting blade 4. The clearance groove 8 leaves a certain gap with the cutting blade 4 while ensuring that the rigidity of the drill bit 3 is not affected, thereby reducing the problem of installation failure caused by manufacturing errors of the cutting blade 4 and the cutting body 1.

[0025] Reference Figure 1 and Figure 2The cutter body 1 has a liquid injection groove 9, and the bottom of the liquid injection groove 9 has a threaded hole 10 that communicates with the mounting groove 2. An adjusting screw 11 matching the size of the threaded hole 10 is threaded into the threaded hole 10. In this embodiment, the adjusting screw 11 can be an internal hexagon socket head cap screw. Therefore, when it is necessary to fine-tune the position of the drill bit 3, the operator inserts a wrench into the internal hexagon socket of the adjusting screw 11, rotates the wrench to rotate the adjusting screw 11, so that the adjusting screw 11 applies a force to the drill bit 3 at one end, thereby achieving fine-tuning of the position of the drill bit 3 within the cutter body 1.

[0026] Reference Figure 1 and Figure 2 The cutting part is provided with a first internal cooling hole 12, and the center of the adjusting screw 11 is provided with a cooling injection hole 13 that communicates with both the first internal cooling hole 12 and the liquid injection tank 9. The chip groove 6 is provided with a second internal cooling hole 14 that communicates with the liquid injection tank 9. Therefore, after passing through the liquid injection tank 9 and the cooling injection hole 13, the coolant is sprayed onto the bottom of the drill bit 3, and then flows into the first internal cooling hole 12 from the bottom of the drill bit 3, thereby cooling the cutting part of the drill bit 3; the coolant can also cool the cutting tool 4 through the liquid injection tank 9 and the second internal cooling hole 14.

[0027] Reference Figure 1 and Figure 2 The drill bit 3 has a mounting flat 15 on its outer edge, and a fixing groove 16 on the cutter body 1. A set screw 17, which matches the fixing groove 16, is threaded into the fixing groove 16. The end of the set screw 17 facing the drill bit 3 abuts against the mounting flat 15. The set screw 17 limits the position of the drill bit 3, reducing the possibility of the drill bit 3 moving or shifting during machining, and improving the stability of the drill bit 3 mounted on the cutter body 1. In this embodiment, the mounting flat 15 is not milled through to the bottom surface of the drill bit 3, reducing the possibility of some coolant flowing from the mounting groove 2 to the fixing groove 16 and thus wasting coolant.

[0028] The implementation principle of this application embodiment is as follows: when it is necessary to process a composite hole, the drill bit 3 is used to drill the composite hole, and the cutting tool 4 on the tool body 1 performs boring of the composite hole during the rotation of the tool body 1, realizing the synchronous processing of multiple diameter holes in the composite hole. There is no need for the operator to manually change the tool, saving the mechanical cycle of tool changing in the traditional processing method, optimizing the processing procedure of the composite hole, and improving the processing efficiency of the composite hole.

[0029] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A composite drill bit of a composite drill bit monolithic cemented carbide, characterized by: The tool includes a tool body (1), on which a mounting groove (2) is provided. A drill bit (3) matching the mounting groove (2) is provided in the mounting groove (2). The drill bit (3) is used to drill a composite hole. The drill bit (3) is provided with a cutting part, which extends out of the tool body (1). The tool body (1) is provided with a cutting tool (4) for boring a composite hole.

2. The composite drill bit of integral cemented carbide according to claim 1, characterized in that: The drill bit (3) has a chip removal groove (5), and the cutter body (1) has a chip receiving groove (6) at one end facing the drill bit (3). The chip removal groove (5) and the chip receiving groove (6) are connected.

3. The composite drill bit of integral cemented carbide according to claim 2, characterized in that: The chip groove (6) has a placement groove (7) on its wall that matches the blade (4), and the blade (4) is placed in the placement groove (7).

4. The composite drill bit of integral cemented carbide according to claim 3, characterized in that: The outer edge of the drill bit (3) is provided with a clearance groove (8) corresponding to the placement groove (7), and the cutting blade (4) is partially inserted into the clearance groove (8).

5. The composite drill bit of integral cemented carbide according to claim 2, characterized in that: The blade body (1) is provided with a liquid injection groove (9), and the bottom of the liquid injection groove (9) is provided with a threaded hole (10) that communicates with the mounting groove (2). An adjusting screw (11) that matches the threaded hole (10) is threadedly connected inside the threaded hole (10).

6. The composite drill bit of integral cemented carbide according to claim 5, characterized in that: The cutting part is provided with a first internal cooling hole (12), and the adjusting screw (11) is provided with a cooling hole (13) that communicates with both the first internal cooling hole (12) and the liquid injection groove (9).

7. The composite drill bit of integral cemented carbide according to claim 5, characterized in that: The chip-containing groove (6) has a second internal cooling hole (14) that communicates with the liquid injection groove (9) on its groove wall.

8. The composite drill bit of integral cemented carbide according to claim 1, characterized in that: The outer edge of the drill bit (3) is provided with a mounting flat (15), and the cutter body (1) is provided with a fixing groove (16). The fixing groove (16) is threaded with a set screw (17) that matches the fixing groove (16). The end of the set screw (17) facing the drill bit (3) abuts against the mounting flat (15).

9. The composite drill bit of integral cemented carbide according to claim 2, characterized in that: The cutting part is provided with a chip guide groove (18) that communicates with the chip removal groove (5).

10. The composite drill bit of integral cemented carbide according to claim 3, characterized in that: The placement groove (7) has a retrieval groove (19) on its groove wall.

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