A coring drill bit

Abstract

The application relates to the technical field of cutting equipment, in particular to a coring drill bit which comprises a diamond cutter head, a sampling cylinder and a connecting piece; the connecting piece is arranged at the bottom of the sampling cylinder and is in communication with the sampling cylinder; the diamond cutter head comprises a first diamond cutter head and a second diamond cutter head; the first diamond cutter head and the second diamond cutter head are alternately and annularly arranged at the cylinder opening of the sampling cylinder; the circular center arcs of the first diamond cutter head and the second diamond cutter head are located on the same circle; the thickness of the first diamond cutter head is smaller than that of the second diamond cutter head, and the height of the first diamond cutter head is greater than the length of the first diamond cutter head. In the application, the first diamond cutter head mainly undertakes the function of cutting, the second diamond cutter head mainly undertakes the functions of grinding and cleaning, and the drilling and coring efficiency of the coring drill bit is obviously improved through the division and cooperation of the first diamond cutter head and the second diamond cutter head.

Description

Technical Field

[0001] This application relates to the field of cutting equipment technology, and in particular to a core drill bit. Background Technology

[0002] The core drill bit mainly consists of a cutting head, a sampling cylinder, and a connector. The cutting head is arranged in a ring at the opening of the sampling cylinder, and the sampling cylinder is connected to the core drilling machine through the connector. Thus, when the core drilling machine drives the core drill bit to rotate, the cutting head on the sampling cylinder continuously cuts the workpiece (materials such as stone, concrete, and asphalt) to complete the core extraction of the workpiece.

[0003] In existing technology, the cutting heads are evenly distributed at the opening of the sampling cylinder, and the cutting heads simultaneously destroy the workpiece; however, it is difficult to fully utilize the cutting function of the cutting heads, thus affecting the core-taking efficiency of the core drill bit. Utility Model Content

[0004] To improve the core extraction efficiency of coring drill bits, this application provides a coring drill bit.

[0005] This application provides a core drilling bit, which adopts the following technical solution: A coring drill bit includes a diamond cutting tip, a sampling cylinder, and a connector; the connector is disposed at the bottom of the sampling cylinder and is connected to the sampling cylinder; the diamond cutting tip includes a first diamond cutting tip and a second diamond cutting tip, which are alternately and circumferentially spaced at the opening of the sampling cylinder, and the central arcs of the first diamond cutting tip and the second diamond cutting tip are located on the same circumference; the thickness of the first diamond cutting tip is less than the thickness of the second diamond cutting tip, and the height of the first diamond cutting tip is greater than the length of the first diamond cutting tip.

[0006] By adopting the above technical solution, the first diamond cutting head contacts the workpiece before the second diamond cutting head, and the first diamond cutting head cuts the workpiece first, creating a free surface for the second diamond cutting head. Then, the second diamond cutting head efficiently crushes and cuts the workpiece, enabling the second diamond cutting head to crush larger workpieces with greater force, thereby significantly reducing the overall crushing energy consumption and improving the drilling and core-taking efficiency of the core drill bit.

[0007] Optionally, the arc length of the first diamond cutter tip is greater than the arc length of the first diamond cutter tip.

[0008] By adopting the above technical solution, the longer arc length of the first diamond cutting tip helps to disperse the force, reduce the local stress on the first diamond cutting tip, reduce the wear of the first diamond cutting tip, and extend the service life of the sampling drill bit.

[0009] Optionally, the height difference between the first diamond cutting tip and the second diamond cutting tip is between 0.5 mm and 3 mm.

[0010] By adopting the above technical solution and controlling the height difference between the first diamond cutting head and the second diamond cutting head, the cutting efficiency of the core drill bit on the workpiece is improved.

[0011] Optionally, the diamond cutting head includes a metal matrix and diamond particles, the diamond particles being uniformly distributed in the metal matrix, and the metal matrix being welded and fixed to the sampling cylinder.

[0012] By adopting the above technical solution, diamond particles are evenly distributed in the metal matrix, thereby making the load on the diamond particles more uniform and reducing local overload heating and overload wear of the diamond cutting head.

[0013] Optionally, on the radial end face of the diamond cutting head, the diamond particles are arranged in a ring array to form a diamond particle layer, and multiple diamond particle layers are arranged along the thickness direction of the diamond cutting head.

[0014] By adopting the above technical solution, the uniformity of diamond particle distribution in the metal matrix is ​​improved.

[0015] Optionally, the density of diamond particles in the first diamond cutting head is greater than the density of diamond particles in the second diamond cutting head.

[0016] By adopting the above technical solution, the density of diamond particles in the first diamond cutting head is greater than that in the second diamond cutting head, thereby reducing the load on a single diamond particle in the first diamond cutting head and thus improving the service life of the first diamond cutting head.

[0017] Optionally, the diamond cutter head has an arc-shaped groove on the side away from the sampling cylinder, and along the circumferential direction of the sampling cylinder, the arc-shaped groove and both sides of the diamond cutter head are provided with a clearance distance.

[0018] By adopting the above technical solution, and by setting an arc-shaped groove on the diamond cutter head, it is beneficial to guide the flow of coolant and cutting chips, and can improve the sharpness of the diamond cutter head and enhance the cutting effect of the diamond cutter head on the workpiece.

[0019] Optionally, the arc-shaped groove includes a first arc-shaped groove and a second arc-shaped groove. The first arc-shaped groove is disposed in the middle area of ​​the diamond cutter head, and there are two second arc-shaped grooves. The two second arc-shaped grooves are disposed on both sides of the first arc-shaped groove, and a clearance distance is provided between the first arc-shaped groove and the second arc-shaped groove.

[0020] By adopting the above technical solution, the cutting effect of the diamond cutter head on the workpiece is improved through the coordinated cooperation of the first arc-shaped groove and the second arc-shaped groove.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The first diamond cutting head contacts the workpiece before the second diamond cutting head. The first diamond cutting head cuts the workpiece first, creating a free surface for the second diamond cutting head. Then, the second diamond cutting head efficiently crushes and cuts the workpiece, allowing the second diamond cutting head to crush larger workpieces with more force, thereby significantly reducing the overall crushing energy consumption and improving the drilling and core-taking efficiency of the core drill bit. 2. The first diamond cutting tip cuts the workpiece before the second diamond cutting tip. The first diamond cutting tip needs to bear a larger force. The longer arc length of the first diamond cutting tip helps to disperse the force, reduce the local stress on the first diamond cutting tip, improve the cutting effect of the first diamond cutting tip on the workpiece, reduce the wear of the first diamond cutting tip, and extend the service life of the sampling drill bit. 3. The first diamond cutting head cuts the workpiece before the second diamond cutting head, and the first diamond cutting head needs to bear a larger force. By making the density of diamond particles in the first diamond cutting head greater than that in the second diamond cutting head, the load on individual diamond particles in the first diamond cutting head is reduced, thereby reducing the wear and shedding of diamond particles in the first diamond cutting head, thus improving the service life of the first diamond cutting head and giving full play to its function. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the core drill bit in Example 1.

[0023] Figure 2 This is a cross-sectional view of the core drill bit in Example 1.

[0024] Figure 3 This is a bottom view of the coring drill bit in Example 1.

[0025] Figure 4 This is a partial cross-sectional view of the coring drill bit in Example 1.

[0026] Figure 5 This is a cross-sectional view of the radial end face of the first diamond cutter head in Example 1.

[0027] Figure 6 This is a cross-sectional view along the height direction of the first diamond cutting head in Example 1.

[0028] Figure 7 This is a cross-sectional view of the radial end face of the second diamond cutter head in Example 1.

[0029] Figure 8 This is a cross-sectional view along the height direction of the second diamond cutting head in Example 1.

[0030] Figure 9 This is a schematic diagram of the core drill bit in Example 2.

[0031] Figure 10 yes Figure 9 Enlarged view of point A in the middle.

[0032] Explanation of reference numerals in the attached drawings: 1. Diamond cutting tip; 11. First diamond cutting tip; 12. Second diamond cutting tip; 13. Metal matrix; 14. Diamond particle; 16. First arc-shaped groove; 17. Second arc-shaped groove; 2. Sampling cylinder; 3. Connecting component. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 -10 provides further details regarding this application.

[0034] Example 1 This application discloses a core drilling bit. (Refer to...) Figure 1 The core drilling bit includes a diamond cutting head 1, a sampling cylinder 2, and a connecting member 3. The connecting member 3 is located at the bottom of the sampling cylinder 2, and the diamond cutting head 1 is arranged in a ring at the opening of the sampling cylinder 2. The core drilling bit is connected to a core drilling machine via the connecting member 3. The core drilling machine drives the core drilling bit to rotate in order to drill core samples from the workpiece (stone, concrete, or other materials).

[0035] Reference Figure 2 The connector 3 is connected to the sampling cylinder 2, so that the coolant in the core drilling machine can be transported to the inside of the sampling cylinder 2 through the connector 3. The coolant flows along the gap between the inner side of the sampling cylinder 2 and the sample core to cool the diamond cutter head 1.

[0036] Reference Figure 2 and Figure 3 In this embodiment, the diamond cutting head 1 includes a first diamond cutting head 11 and a second diamond cutting head 12. The first diamond cutting head 11 and the second diamond cutting head 12 are alternately and circumferentially spaced at the opening of the sampling cylinder 2, and the central arcs of the first diamond cutting head 11 and the second diamond cutting head 12 are located on the same circumference. In this embodiment, there are four of each type of diamond cutting head 11 and second diamond cutting head 12, and a distance is provided between each of the first diamond cutting head 11 and the second diamond cutting head.

[0037] Reference Figure 2 and Figure 3The thickness of the first diamond cutting tip 11 is less than the thickness of the second diamond cutting tip 12, and the height of the first diamond cutting tip 11 is greater than the length of the second diamond cutting tip 12, meaning that the first diamond cutting tip 11 contacts the workpiece before the second diamond cutting tip 12. Furthermore, the arc length of the first diamond cutting tip 11 is greater than the arc length of the second diamond cutting tip 12.

[0038] Reference Figure 4 Specifically, the height difference between the first diamond cutting head 11 and the second diamond cutting head 12 is between 0.5mm and 3mm. In this embodiment, the height difference between the first diamond cutting head 11 and the second diamond cutting head 12 is 1mm; this is to adjust the synergistic effect of the first diamond cutting head 11 and the second diamond cutting head 12 to improve the cutting efficiency of the core drill bit on the workpiece.

[0039] The implementation principle of a coring drill bit in this application embodiment is as follows: Reference Figure 2 The first diamond cutting head 11 contacts the workpiece before the second diamond cutting head 12. The first diamond cutting head 11 cuts the workpiece first, creating a free surface for the second diamond cutting head 12. Then, the second diamond cutting head 12 efficiently crushes and cuts the workpiece, enabling the second diamond cutting head 12 to crush larger workpieces with greater force, thereby significantly reducing the overall crushing energy consumption and improving the drilling and core-taking efficiency of the core drill bit.

[0040] The first diamond cutter head 11 primarily performs the "cutting" function, while the second diamond cutter head 12 primarily performs the "grinding" and "cleaning" functions. Through the division of labor and cooperation between the first and second diamond cutter heads 11 and 12, the drilling and core-retrieving efficiency of the core drill bit is significantly improved. Furthermore, the grooves cut by the first diamond cutter head 11 provide smoother flow for cooling water and cutting chips, allowing the cutting chips to be carried away from the cutting surface more quickly, reducing repeated breakage and further improving the drilling and core-retrieving efficiency of the core drill bit.

[0041] In addition, the groove cut by the first diamond cutter head 11 provides a smoother flow of cooling water and cutting chips, allowing the cutting chips to be carried away from the cutting surface more quickly, reducing repeated breakage and improving the drilling and core-taking efficiency of the core drill bit.

[0042] Reference Figure 2 and Figure 3 The first diamond cutting tip 11 cuts into the workpiece first, providing a stable fulcrum for the entire core drill bit. This can effectively suppress the lateral vibration and jumping of the core drill bit during the drilling process, reduce the impact of the core drill bit on the core sample, and improve the integrity and recovery rate of the core sample.

[0043] The first diamond cutting head 11 cuts the workpiece before the second diamond cutting head 12. The first diamond cutting head 11 needs to bear a larger force. The longer arc length of the first diamond cutting head 11 helps to disperse the force, reduce the local stress on the first diamond cutting head 11, improve the cutting effect of the first diamond cutting head 11 on the workpiece, reduce the wear of the first diamond cutting head 11, and extend the service life of the sampling drill bit.

[0044] Reference Figures 5 to 8 The diamond cutter head 1 includes a metal matrix 13 and diamond particles 14. The diamond particles 14 are evenly distributed in the metal matrix 13. The metal matrix 13 is welded and fixed to the sampling cylinder 2.

[0045] Reference Figure 5 and Figure 6 Taking the first diamond cutting head 11 as an example, the first diamond cutting head 11 includes a metal matrix 13 and diamond particles 14, with the diamond particles 14 uniformly distributed in the metal matrix 13. On the radial end face of the first diamond cutting head 11, the diamond particles 14 are arranged in a ring array to form a diamond particle layer 14, and multiple diamond particle layer 14 layers are arranged along the thickness direction of the first diamond cutting head 11; this improves the uniformity of the distribution of diamond particles 14 in the metal matrix 13.

[0046] Reference Figure 7 and Figure 8 Taking the second diamond cutting head 12 as an example, the second diamond cutting head 12 includes a metal matrix 13 and diamond particles 14, with the diamond particles 14 uniformly distributed in the metal matrix 13. On the radial end face of the second diamond cutting head 12, the diamond particles 14 are arranged in a ring array to form a diamond particle layer 14, and multiple layers of diamond particle layer 14 are arranged along the thickness direction of the second diamond cutting head 12; this improves the uniformity of the distribution of diamond particles 14 in the metal matrix 13.

[0047] In the first diamond cutting head 11 and the second diamond cutting head 12, the diamond particles 14 are evenly distributed in the metal matrix 13, thereby making the load on the diamond particles 14 more uniform and the heat generated by the diamond cutting head 1 more uniform, reducing the local overload heating and overload wear of the first diamond cutting head 11 and the second diamond cutting head 12.

[0048] Reference Figure 5 and Figure 7In this embodiment, the density of diamond particles 14 in the first diamond cutting head 11 is greater than the density of diamond particles 14 in the second diamond cutting head 12. The first diamond cutting head 11 cuts the workpiece before the second diamond cutting head 12, requiring the first diamond cutting head 11 to bear a greater force. By making the density of diamond particles 14 in the first diamond cutting head 11 greater than that in the second diamond cutting head 12, the load on individual diamond particles 14 in the first diamond cutting head 11 is reduced, decreasing the likelihood of wear and shedding of diamond particles 14, thereby increasing the service life of the first diamond cutting head 11 and fully utilizing its function.

[0049] Example 2 The difference between Example 2 and Example 1 is as follows: Reference Figure 9 and Figure 10 The diamond cutter head 1 has an arc-shaped groove on the side away from the sampling cylinder 2. Along the circumferential direction of the sampling cylinder 2, there is a clearance distance between the arc-shaped groove and both sides of the diamond cutter head 1. Specifically, the arc-shaped groove includes a first arc-shaped groove 16 and a second arc-shaped groove 17. The first arc-shaped groove 16 is located in the middle area of ​​the diamond cutter head 1, and there are two second arc-shaped grooves 17, which are located on both sides of the first arc-shaped groove 16. There is a clearance distance between the first arc-shaped groove 16 and the second arc-shaped groove 17.

[0050] The implementation principle of a coring drill bit in this application embodiment is as follows: Reference Figure 9 and Figure 10 The coordinated action of the first arc-shaped groove 16 and the second arc-shaped groove 17 helps to guide the flow of coolant and cutting chips, and can improve the sharpness of the diamond cutter head 1 and enhance the cutting effect of the diamond cutter head 1 on the workpiece.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A core drilling bit, characterized in that: The sample includes a diamond cutting head (1), a sampling cylinder (2), and a connector (3). The connector (3) is located at the bottom of the sampling cylinder (2) and is connected to the sampling cylinder (2). The diamond cutting head (1) includes a first diamond cutting head (11) and a second diamond cutting head (12). The first diamond cutting head (11) and the second diamond cutting head (12) are alternately and circumferentially spaced at the opening of the sampling cylinder (2). The central arcs of the first diamond cutting head (11) and the second diamond cutting head (12) are located on the same circumference. The thickness of the first diamond cutting head (11) is less than the thickness of the second diamond cutting head (12), and the height of the first diamond cutting head (11) is greater than the length of the first diamond cutting head (12).

2. The coring drill bit according to claim 1, characterized in that: The arc length of the first diamond cutter tip (11) is greater than the arc length of the first diamond cutter tip (11).

3. The coring drill bit according to claim 1, characterized in that: The height difference between the first diamond cutter head (11) and the second diamond cutter head (12) is between 0.5 mm and 3 mm.

4. The coring drill bit according to claim 1, characterized in that: The diamond cutting head (1) includes a metal matrix (13) and diamond particles (14). The diamond particles (14) are evenly distributed in the metal matrix (13). The metal matrix (13) is welded and fixed to the sampling cylinder (2).

5. The coring drill bit according to claim 4, characterized in that: On the radial end face of the diamond cutting head (1), the diamond particles (14) are arranged in a ring to form a diamond particle (14) layer, and along the thickness direction of the diamond cutting head (1), the diamond particle (14) layer is arranged in multiple layers.

6. The coring drill bit according to claim 4, characterized in that: The density of diamond particles (14) in the first diamond cutter head (11) is greater than the density of diamond particles (14) in the second diamond cutter head (12).

7. The coring drill bit according to claim 1, characterized in that: The diamond cutter head (1) has an arc-shaped groove on the side away from the sampling cylinder (2). Along the circumferential direction of the sampling cylinder (2), the arc-shaped groove and both sides of the diamond cutter head (1) are provided with a clearance distance.

8. The coring drill bit according to claim 7, characterized in that: The arc-shaped groove includes a first arc-shaped groove (16) and a second arc-shaped groove (17). The first arc-shaped groove (16) is located in the middle area of ​​the diamond cutter head (1). There are two second arc-shaped grooves (17), which are located on both sides of the first arc-shaped groove (16). There is a clearance distance between the first arc-shaped groove (16) and the second arc-shaped groove (17).

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