Hard alloy drill bit with self-lubricating coating

Abstract

The utility model belongs to the technical field of drill bits, particularly relates to a hard alloy drill bit with a self-lubricating coating, and aims to solve the problem that the existing integral replacement is relatively waste, the following scheme is provided: the hard alloy drill bit comprises a drill rod, the drill bit penetrates out of the bottom end of the drill rod, and a dismounting mechanism is arranged in the drill rod; the dismounting and mounting mechanism comprises a penetrating rod, the penetrating rod is fixedly provided with the top end of a drill bit, and a limiting block is fixedly installed on the outer wall of the penetrating rod. Firstly, after the top end of the drill bit penetrates into the drill rod, the positioning block is sleeved with the positioning hole, meanwhile, the limiting block slides along the clamping groove, and then the drill rod is sleeved with a first threaded lantern ring; the drill bit can be rapidly replaced after the drill bit is damaged or a coating is abraded, waste caused by the fact that the drill bit and the drill rod need to be replaced together is avoided, meanwhile, the limiting block is limited through the clamping groove, the positioning hole is limited through the positioning block, and the bearing strength of the overall torque of the drill bit can be improved.

Description

Technical Field

[0001] This utility model relates to a cemented carbide drill bit, specifically a cemented carbide drill bit with a self-lubricating coating, belonging to the field of drill bit technology. Background Technology

[0002] Carbide drill bits are drill bits with carbide as the main material for the cutting part. They are made of carbide material, which has high strength and rigidity, is more stable during cutting, and is not easy to break. They are suitable for various high-precision and high-difficulty drilling operations.

[0003] In the prior art, such as the micro-diameter coated drill bit disclosed in CN222429362U, the surface of the drill bit is provided with a spiral curved groove, and cutting edges are formed on both sides of the edge of the curved groove. The surface of the drill bit is coated with a TAC coating. This configuration makes the cutting edge of the micro-diameter coated drill bit of this utility model have high rigidity and hardness, and can increase the lubrication of the drill bit surface and reduce the coefficient of friction. This makes chip removal smoother when the drill bit is drilling a machinable ceramic wire needle fixture, improving the drilling accuracy and stability, thereby ensuring the drilling quality and extending the service life of the drill bit.

[0004] However, in implementing the relevant technology, the following problems were found in the micro-diameter coated drill bit designed above: Although the existing technology sets a corresponding coating on the outer wall of the drill bit to increase lubrication, in the actual use process, the drill bit may damage these coatings when working, thus making it unusable. Since the drill bit and drill rod are integrated, it is wasteful to replace the whole thing. In view of this, a carbide drill bit with a self-lubricating coating is provided to overcome the above defects. Utility Model Content

[0005] This invention addresses the problem that the aforementioned drill bits may damage these coatings during operation, rendering them unusable, and since replacing the entire drill bit and drill rod is wasteful due to their integrated nature. Therefore, this invention provides a carbide drill bit with a self-lubricating coating.

[0006] The present invention achieves the above objectives through the following technical solution: a cemented carbide drill bit with a self-lubricating coating, comprising a drill rod, wherein the drill bit protrudes from the bottom end of the drill rod, and a disassembly and assembly mechanism is provided inside the drill rod.

[0007] The disassembly and assembly mechanism includes an insertion rod, on which the top end of the drill bit is fixedly installed. A limit block is fixedly installed on the outer wall of the insertion rod. A slot is provided on the outer wall of the drill rod corresponding to the position of the limit block. A through groove is provided inside the drill rod corresponding to the position of the insertion rod. A first threaded collar is fitted on the lower part of the outer wall of the drill rod. A positioning hole is provided on the inner wall of the insertion rod. A positioning block is fixedly installed inside the through groove at the position corresponding to the positioning hole.

[0008] As a further embodiment of this utility model: the first threaded collar is threadedly connected to the drill rod, and the drill rod forms a sliding structure with the limiting block through the groove.

[0009] As a further improvement of this utility model: a second threaded collar is fitted on the upper part of the outer wall of the drill rod, and a positioning mechanism is provided below the second threaded collar.

[0010] As a further embodiment of this utility model: the positioning mechanism includes a lower pressure ring, which is sleeved below the second threaded collar on the outer wall of the drill rod, and an abutment block is fixedly installed inside the lower pressure ring.

[0011] As a further improvement of this utility model: a mounting groove is provided on the outer wall of the drill rod at the position corresponding to the contact block, and a rotating plate is rotatably connected inside the mounting groove.

[0012] As a further improvement of this utility model: a support rod extends through the inner wall of the rotating plate, and a support block is fixedly installed at the bottom end of the rotating plate.

[0013] As a further embodiment of this utility model: the limiting block is provided with a limiting mechanism inside, the limiting mechanism includes a limiting hole, the limiting hole is opened at the top of the limiting block, the bottom end of the lower pressure ring is fixedly installed with a limiting rod, and the limiting rod is covered with a rubber sleeve.

[0014] The beneficial effects of this utility model are as follows: First, after the drill bit tip inserts the rod into the drill rod, the positioning hole is fitted outside the positioning block, and at the same time, the limiting block slides along the slot. Then, the drill rod is fitted with the first threaded collar and abuts against the lower part of the limiting block. This allows the drill bit to be replaced quickly after the drill bit is damaged or the coating is worn, avoiding the waste of replacing the drill rod together. At the same time, the limiting block is limited by the slot, and the positioning block is limited by the positioning hole, which can improve the overall torque bearing capacity of the drill bit.

[0015] After the drill bit is installed, the second threaded collar is tightened to press the lower pressure ring onto the limiting block. The contact block fixed by the lower pressure ring slides stably along the mounting groove, thereby abutting against the rotating plate and sliding. The rotating plate rotates inside the mounting groove via the support rod, causing the support block to pass through the mounting groove and bear the first threaded collar from below, thereby improving the connection stability of the first threaded collar and preventing the drill bit from becoming loose from the drill rod during operation.

[0016] When the pressure ring abuts against the limiting block, the limiting rod inserts into the limiting hole, further improving the stability of the connection between the various components and preventing loosening during drilling of the drill rod and drill bit. At the same time, the limiting rod limits the limiting block, which can further improve the torque bearing capacity of the drill bit. Attached Figure Description

[0017] Fig. 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Fig. 2 This is a schematic diagram of the insertion rod structure of this utility model;

[0019] Fig. 3 This is a schematic diagram of the contact block structure of this utility model;

[0020] Fig. 4 This is a schematic diagram of the rotating plate structure of this utility model.

[0021] In the diagram: 1. Drill rod; 2. Drill bit; 3. Assembly / disassembly mechanism; 301. Insertion rod; 302. Limiting block; 303. Slot; 304. First threaded collar; 305. Through groove; 306. Positioning block; 307. Positioning hole; 4. Second threaded collar; 5. Positioning mechanism; 501. Lower pressure ring; 502. Abutment block; 503. Placement groove; 504. Rotating plate; 505. Support rod; 506. Support block; 6. Limiting mechanism; 601. Limiting hole; 602. Limiting rod; 603. Rubber sleeve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0023] like Figs. 1 to 4As shown, a carbide drill bit with a self-lubricating coating includes a drill rod 1, with a drill bit 2 extending from the bottom end of the drill rod 1. A disassembly / assembly mechanism 3 is provided inside the drill rod 1. The disassembly / assembly mechanism 3 includes an insertion rod 301, with the top end of the drill bit 2 fixedly mounted on the insertion rod 301. A limiting block 302 is fixedly mounted on the outer wall of the insertion rod 301. A slot 303 is formed on the outer wall of the drill rod 1 corresponding to the position of the limiting block 302. A through groove 305 is formed inside the drill rod 1 corresponding to the position of the insertion rod 301. A first threaded collar 304 is fitted onto the lower part of the outer wall of the drill rod 1. A positioning hole 307 is formed on the inner wall of the insertion rod 301. A positioning block 305 is fixedly mounted inside the through groove 305 at a position corresponding to the position of the positioning hole 307. 6. The first threaded collar 304 is threadedly connected to the drill rod 1. The drill rod 1 forms a sliding structure between the slot 303 and the limiting block 302. First, after the drill bit 2 is inserted into the drill rod 1 through the rod 301, the positioning hole 307 is fitted outside the positioning block 306. At the same time, the limiting block 302 slides along the slot 303. Then, the drill rod 1 is fitted with the first threaded collar 304 and abuts against the lower part of the limiting block 302. This allows the drill bit 2 to be quickly replaced after damage or coating wear, avoiding the waste of replacing the drill rod 1 together. At the same time, the limiting block 302 is limited by the slot 303 and the positioning hole 307 is limited by the positioning block 306, which can improve the overall torque bearing capacity of the drill bit 2. Example 2

[0024] In addition to all the technical features in Embodiment 1, this embodiment also includes: a second threaded collar 4 sleeved on the upper part of the outer wall of the drill rod 1, a positioning mechanism 5 provided below the second threaded collar 4, the positioning mechanism 5 including a lower pressure ring 501, the lower pressure ring 501 sleeved below the second threaded collar 4 on the outer wall of the drill rod 1, an abutment block 502 fixedly installed inside the lower pressure ring 501, a mounting groove 503 opened on the outer wall of the drill rod 1 corresponding to the position of the abutment block 502, a rotating plate 504 rotatably connected inside the mounting groove 503, a support rod 505 protruding from the inner wall of the rotating plate 504, and the bottom end of the rotating plate 504 fixed. A support block 506 is installed. After the drill bit 2 is installed, the second threaded collar 4 is turned to press the lower pressure ring 501 onto the limiting block 302. The contact block 502 fixed by the lower pressure ring 501 slides stably along the mounting groove 503, thereby abutting against the rotating plate 504 and sliding. The rotating plate 504 rotates inside the mounting groove 503 via the support rod 505, causing the support block 506 to pass through the mounting groove 503 and support and abut against the first threaded collar 304 from below. This improves the connection stability of the first threaded collar 304 and prevents the drill bit 2 from becoming loose from the drill rod 1 during operation. Example 3

[0025] In addition to all the technical features in Embodiment 1, this embodiment also includes: a limiting mechanism 6 is provided inside the limiting block 302, the limiting mechanism 6 includes a limiting hole 601, the limiting hole 601 is opened at the top of the limiting block 302, a limiting rod 602 is fixedly installed at the bottom of the lower pressure ring 501, and a rubber sleeve 603 is sleeved on the outside of the limiting rod 602; when the lower pressure ring 501 abuts against the limiting block 302, the limiting rod 602 is inserted into the limiting hole 601, which further improves the stability of the connection between the various components and avoids loosening during the drilling process of the drill rod 1 and the drill bit 2. At the same time, the limiting rod 602 limits the limiting block 302, which can further improve the torque bearing capacity of the drill bit 2.

[0026] Working principle: The outer wall of drill bit 2 is coated with titanium carbonitride (TiCN), which provides self-lubrication during operation. Simultaneously, the through rod 301 of drill bit 2 is inserted into the through groove 305 and initially positioned by the positioning block 306 via the positioning hole 307. As the positioning block 302 slides along the groove 303, the first threaded collar 304 is threadedly connected to drill rod 1 and abuts against the positioning block 302, allowing for quick assembly of drill bit 2 and drill rod 1. When the coating of drill bit 2 is damaged, it can be quickly replaced. The positioning of the positioning block 302 via the groove 303, and the positioning holes 307 and positioning block 306, increases the torque bearing capacity of drill bit 2. Simultaneously, adjusting the second threaded collar 4 allows the lower pressure ring 501 to abut against the limiting... On the positioning block 302, the limiting rod 602 is inserted into the limiting hole 601 to further achieve the positioning effect, improve the connection stability between the components, and through the elasticity of the rubber sleeve 603, the limiting rod 602 is not easy to loosen after being inserted into the limiting hole 601. When the pressure ring 501 slides, the abutment block 502 slides along the mounting groove 503 to keep the pressure ring 501 sliding stably and prevent the limiting rod 602 from being unable to align with the limiting hole 601. At the same time, it can press the rotating plate 504, so that the rotating plate 504 rotates through the support rod 505, and the support block 506 passes through the mounting groove 503 to support the first threaded collar 304 from below, thereby improving the stability of the first threaded collar 304 and preventing the drill rod 1 and drill bit 2 from loosening during rotation.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A carbide drill bit with a self-lubricating coating, comprising a drill rod (1), characterized in that: The drill bit (2) protrudes from the bottom end of the drill rod (1), and the drill rod (1) is equipped with a disassembly and assembly mechanism (3). The disassembly and assembly mechanism (3) includes an insertion rod (301), on which the top end of the drill bit (2) is fixedly installed, and a limiting block (302) is fixedly installed on the outer wall of the insertion rod (301). A slot (303) is provided on the outer wall of the drill rod (1) corresponding to the position of the limiting block (302), and a through groove (305) is provided inside the drill rod (1) corresponding to the position of the insertion rod (301). A first threaded collar (304) is sleeved on the lower part of the outer wall of the drill rod (1). A positioning hole (307) is provided on the inner wall of the insertion rod (301), and a positioning block (306) is fixedly installed on the upper part of the through groove (305) corresponding to the position of the positioning hole (307).

2. A carbide drill bit with a self-lubricating coating according to claim 1, characterized in that: The first threaded collar (304) is threadedly connected to the drill rod (1), and the drill rod (1) forms a sliding structure with the limiting block (302) through the groove (303).

3. A carbide drill bit with a self-lubricating coating according to claim 1, characterized in that: The drill rod (1) is fitted with a second threaded collar (4) on the upper part of its outer wall, and a positioning mechanism (5) is provided below the second threaded collar (4).

4. A carbide drill bit with a self-lubricating coating according to claim 3, characterized in that: The positioning mechanism (5) includes a pressure ring (501), which is sleeved below the second threaded collar (4) on the outer wall of the drill rod (1), and an abutment block (502) is fixedly installed inside the pressure ring (501).

5. A carbide drill bit with a self-lubricating coating according to claim 1, characterized in that: The drill rod (1) has a mounting groove (503) on its outer wall corresponding to the position of the contact block (502), and a rotating plate (504) is rotatably connected inside the mounting groove (503).

6. A carbide drill bit with a self-lubricating coating according to claim 5, characterized in that: A support rod (505) extends through the inner wall of the rotating plate (504), and a support block (506) is fixedly installed at the bottom end of the rotating plate (504).

7. A carbide drill bit with a self-lubricating coating according to claim 4, characterized in that: The limiting block (302) is provided with a limiting mechanism (6) inside. The limiting mechanism (6) includes a limiting hole (601). The limiting hole (601) is opened at the top of the limiting block (302). The bottom end of the lower pressure ring (501) is fixedly installed with a limiting rod (602), and the limiting rod (602) is covered with a rubber sleeve (603).

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