Detachable hard alloy drill bit

Abstract

The utility model discloses a detachable hard alloy drill bit, which relates to the technical field of alloy drill bits, and comprises a connecting handle, the top of the connecting handle is fixedly connected with a first threaded column, the inside of the connecting handle is in threaded connection with an adjusting bolt, the surface of the connecting handle is provided with an accommodating groove, a hexagonal column is inserted into the connecting handle, and the hexagonal column is connected with the connecting handle. An adjusting hole is formed in the surface of the hexagonal column, and the inner wall of the adjusting hole is in lap joint with the surface of the adjusting bolt. Through the arrangement of the cutting edge and the mounting slot, when the cutting edge of the drill bit is broken, the drill bit can be normally used only by detaching the broken cutting edge from the mounting slot and replacing the broken cutting edge with a new cutting edge, compared with the conventional mode of replacing the whole drill bit, the cost is lower, and meanwhile, the adjusting bolt and the adjusting hole are arranged, so that the drill bit is convenient to use. And the length of the cutting edge extending out of the connecting handle can be adjusted, so that the drill bit can adapt to different drilling requirements and is more convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of alloy drill bit technology, specifically to a detachable carbide drill bit. Background Technology

[0002] Carbide drill bits are a common drilling tool, primarily made of cemented carbide, a hard compound of refractory metals and a binder metal, produced through powder metallurgy. Common cemented carbides include tungsten-cobalt (YG) and tungsten-titanium-cobalt (YT) carbides. Tungsten-cobalt carbides possess good toughness and wear resistance, making them suitable for machining brittle materials such as cast iron and non-ferrous metals; tungsten-titanium-cobalt carbides, on the other hand, have higher hardness and are suitable for machining tough materials such as steel. For example, when machining cast iron parts, using a YG8 carbide drill bit can achieve good cutting results.

[0003] For example, Chinese Patent CN220028774U discloses a cemented carbide drill bit, including a cutter body, a fixing block fixedly mounted on the cutter body, a scraper slidably connected to the chip removal groove of the cutter body, a lower groove for accommodating the scraper provided on the lower wall of the fixing block, a pull-back assembly provided inside the fixing block, the pull-back assembly being connected to the scraper, the pull-back assembly being able to independently pull the scraper upward, the pull-back assembly including at least one roller embedded in the upper wall of the lower groove, the roller being rotatably connected to the upper wall of the lower groove, a torsion spring provided at the connection between the roller and the fixing block, a pull rope provided on the roller, and the pull rope being fixedly connected to the scraper.

[0004] Although the above example can remove chips using a scraper, when the drill bit breaks during long-term use, the entire drill bit needs to be replaced. However, most drill bit damage is caused by the cutting edge breaking, while the rest of the part remains intact. Replacing the entire drill bit directly is costly and inconvenient. Utility Model Content

[0005] This invention provides a detachable carbide drill bit to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A detachable carbide drill bit includes a connecting shank, a first threaded post fixedly connected to the top of the connecting shank, an adjusting bolt threadedly connected to the inside of the connecting shank, a receiving groove formed on the surface of the connecting shank, a hexagonal post inserted into the inside of the connecting shank, an adjusting hole formed on the surface of the hexagonal post, and the inner wall of the adjusting hole overlapping the surface of the adjusting bolt.

[0008] A further improvement of this utility model is that: the surface of the lower end of the hexagonal prism is fixedly connected with a mounting slot, and six sets of mounting slots are provided. The surface of the mounting slot engages with the interior of the receiving groove opened on the surface of the connecting handle.

[0009] A further improvement of this utility model is that: the mounting slot has an interference fit with a cutting blade inside, and the length of the cutting blade is slightly greater than the length of the receiving groove opened on the surface of the connecting handle.

[0010] A further improvement of this utility model is that the thickness of the cutting blade is slightly less than the depth of the receiving groove opened on the surface of the connecting handle, and the bottom of the hexagonal column is threaded with a second threaded column.

[0011] A further improvement of the present invention is that a drill bit is fixedly connected to the bottom of the second threaded post, and the surface of the drill bit is provided with a drill bit.

[0012] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0013] This utility model provides a detachable carbide drill bit. With the setting of the cutting edge and the mounting slot, when the cutting edge of the drill bit breaks, it is only necessary to remove the broken cutting edge from the mounting slot and replace it with a new cutting edge, so that the drill bit can be used normally. Compared with the conventional method of replacing the entire drill bit, the cost is lower. At the same time, the setting of the adjusting bolt and the adjusting hole can also adjust the length of the cutting edge extending from the connecting shank, so that the drill bit can adapt to different drilling needs and is more convenient to use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the cutting blade structure of this utility model;

[0016] Figure 3 This is an exploded structural diagram of the present invention;

[0017] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point A.

[0018] In the diagram: 1. Connecting handle; 2. First threaded post; 3. Adjusting bolt; 4. Hexagonal post; 5. Adjusting hole; 6. Mounting slot; 7. Cutting blade; 8. Second threaded post; 9. Drill and tap head; 10. Drill and tap cutting edge. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to embodiments: Example 1

[0020] like Figure 1-4 As shown, this utility model provides a detachable carbide drill bit, including a connecting shank 1, a first threaded post 2 fixedly connected to the top of the connecting shank 1, an adjusting bolt 3 threadedly connected to the inside of the connecting shank 1, a receiving groove opened on the surface of the connecting shank 1, a hexagonal post 4 inserted into the inside of the connecting shank 1, an adjusting hole 5 opened on the surface of the hexagonal post 4, and the inner wall of the adjusting hole 5 overlaps with the surface of the adjusting bolt 3.

[0021] In this embodiment, the first threaded post 2 is connected to the output shaft of the drilling equipment. Then, according to the drilling requirements, the adjusting bolt 3 is rotated to disengage the adjusting bolt 3 from the adjusting hole 5, and the hexagonal post 4 can slide inside the connecting handle 1. The length of the cutting edge 7 extending out of the connecting handle 1 is adjusted step by step according to the spacing between the adjusting holes 5. After adjusting to the appropriate length, drilling is performed. During drilling, the drill bit 9 and the drill bit 10 are used to open the hole, and the inner wall of the hole is trimmed by the cutting edge 7. When the cutting edge 7 breaks, it is removed from the mounting slot 6 by freezing, causing it to shrink upon cooling. Then, a new cutting edge 7 is inserted into the mounting slot 6 by freezing. As the temperature of the cutting edge 7 rises, it expands slightly to achieve an interference fit with the mounting slot 6. When the drill bit 10 breaks, the drill bit 9 is rotated to separate the second threaded post 8 from the hexagonal post 4, and the drill bit 9 is replaced. This means that when the drill bit is damaged, only the corresponding part needs to be replaced, instead of replacing the whole part, thus reducing replacement costs. Example 2

[0022] like Figure 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, it includes a connecting handle 1, a first threaded post 2 fixedly connected to the top of the connecting handle 1, an adjusting bolt 3 threadedly connected to the inside of the connecting handle 1, a receiving groove opened on the surface of the connecting handle 1, a hexagonal post 4 inserted into the inside of the connecting handle 1, an adjusting hole 5 opened on the surface of the hexagonal post 4, the inner wall of the adjusting hole 5 overlapping with the surface of the adjusting bolt 3, a mounting slot 6 fixedly connected to the lower end of the hexagonal post 4, six sets of mounting slots 6 are provided, the surface of the mounting slot 6 engages with the inside of the receiving groove opened on the surface of the connecting handle 1, and a cutting blade 7 is interference-fitted into the inside of the mounting slot 6.

[0023] In this embodiment, the first threaded post 2 is connected to the output shaft of the drilling equipment. Then, according to the drilling requirements, the adjusting bolt 3 is rotated to disengage the adjusting bolt 3 from the adjusting hole 5. The hexagonal post 4 can slide inside the connecting handle 1. The length of the cutting edge 7 extending out of the connecting handle 1 is adjusted step by step according to the spacing between the adjusting holes 5. After adjusting to the appropriate length, drilling is performed. During drilling, the drill bit 9 and the drill cutting edge 10 are used to open the hole, and the inner wall of the hole is trimmed by the cutting edge 7. Example 3

[0024] like Figure 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, it includes a connecting handle 1, a first threaded post 2 fixedly connected to the top of the connecting handle 1, an adjusting bolt 3 threadedly connected to the inside of the connecting handle 1, a receiving groove opened on the surface of the connecting handle 1, a hexagonal post 4 inserted into the inside of the connecting handle 1, an adjusting hole 5 opened on the surface of the hexagonal post 4, the inner wall of the adjusting hole 5 overlapping with the surface of the adjusting bolt 3, the length of the cutting blade 7 being slightly greater than the length of the receiving groove opened on the surface of the connecting handle 1, the thickness of the cutting blade 7 being slightly less than the depth of the receiving groove opened on the surface of the connecting handle 1, a second threaded post 8 threadedly connected to the bottom of the hexagonal post 4, a drill bit 9 fixedly connected to the bottom of the second threaded post 8, and a drill bit 10 provided on the surface of the drill bit 9.

[0025] In this embodiment, when the cutting edge 7 breaks, it is removed from the mounting slot 6 by freezing, causing it to shrink. Then, a new cutting edge 7 is inserted into the mounting slot 6 by freezing. As the temperature of the cutting edge 7 rises, it expands slightly, achieving an interference fit with the mounting slot 6. When the drill bit 10 breaks, the drill bit 9 is rotated to separate the second threaded post 8 from the hexagonal post 4, allowing the drill bit 9 to be replaced. This means that when the drill bit is damaged, only the corresponding parts need to be replaced, instead of replacing the entire drill bit, resulting in lower replacement costs.

[0026] The working principle of this detachable carbide drill bit will be explained in detail below.

[0027] like Figure 1-4 As shown, during drilling, the first threaded post 2 is connected to the output shaft of the drilling equipment. Then, according to the drilling requirements, the adjusting bolt 3 is rotated to disengage the adjusting bolt 3 from the adjusting hole 5, allowing the hexagonal post 4 to slide inside the connecting handle 1. The length of the cutting edge 7 extending out of the connecting handle 1 is adjusted step by step according to the spacing between the adjusting holes 5. After adjusting to the appropriate length, drilling is performed. During drilling, the drill bit 9 and the drill cutting edge 10 are used to open the hole, and the inner wall of the hole is trimmed by the cutting edge 7. When the cutting edge 7 breaks, it is removed from the mounting slot 6 by freezing, causing it to shrink upon cooling. Then, a new cutting edge 7 is inserted into the mounting slot 6 by freezing. As the temperature of the cutting edge 7 rises, it expands slightly, achieving an interference fit with the mounting slot 6. When the drill cutting edge 10 breaks, the drill bit 9 is rotated to separate the second threaded post 8 from the hexagonal post 4, allowing the drill bit 9 to be replaced. This means that when the drill bit is damaged, only the corresponding parts need to be replaced, rather than the entire drill bit, resulting in lower replacement costs.

[0028] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A detachable carbide drill bit, comprising a connecting shank (1), characterized in that: The top of the connecting handle (1) is fixedly connected to a first threaded post (2), and the inside of the connecting handle (1) is threaded with an adjusting bolt (3). The surface of the connecting handle (1) is provided with a receiving groove, and a hexagonal post (4) is inserted into the inside of the connecting handle (1). The surface of the hexagonal post (4) is provided with an adjusting hole (5), and the inner wall of the adjusting hole (5) overlaps with the surface of the adjusting bolt (3).

2. The detachable carbide drill bit according to claim 1, characterized in that: The lower end of the hexagonal column (4) is fixedly connected to a mounting slot (6), and six sets of mounting slots (6) are provided. The surface of the mounting slot (6) engages with the internal receiving groove opened on the surface of the connecting handle (1).

3. A detachable carbide drill bit according to claim 2, characterized in that: The mounting slot (6) has an internal interference fit with a cutting blade (7), the length of which is slightly greater than the length of the receiving groove opened on the surface of the connecting handle (1).

4. A detachable carbide drill bit according to claim 3, characterized in that: The thickness of the cutting blade (7) is slightly less than the depth of the receiving groove opened on the surface of the connecting handle (1), and the bottom of the hexagonal column (4) is threaded with a second threaded column (8).

5. A detachable carbide drill bit according to claim 4, characterized in that: The bottom of the second threaded post (8) is fixedly connected to a drill bit (9), and the surface of the drill bit (9) is provided with a drill bit (10).

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