Efficient twist drill with stepped drill tip

Abstract

The utility model discloses an efficient twist drill with a stepped drill tip, and relates to the technical field of twist drills, the efficient twist drill comprises a drill bit assembly, the surface of the drill bit assembly is fixedly connected with a liquid conveying assembly, the liquid conveying assembly comprises a mounting piece, the bottom of the mounting piece is fixedly connected with a first shell, and a liquid injection hole is formed in the surface of the first shell; the inner wall of the first shell is fixedly connected with a sliding rail, and the surface of the sliding rail is slidably connected with a sliding sleeve. Through the arrangement of the liquid conveying assembly, cooling liquid can be injected into the liquid guide groove along the liquid inlet hole in the rotating process of the drill bit assembly, so that the cooling liquid is sprayed out from the liquid outlet hole and directly cools the drill bit from the drill tip part, and the cooling liquid flowing out along the chip discharging groove can cool the drill body again in the flowing-out process; and meanwhile, due to the arrangement of the reaming blades and the drill bit with the stepped reaming blades, the hole opening speed of the drill bit can be increased, and hole opening is more efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of twist drills, in particular to a high-efficiency twist drill with a stepped drill point. Background Art

[0002] A twist drill is a drilling tool with spiral grooves, named for its resemblance to a twisted thread. It primarily consists of a shank, a neck, and a working section. The shank is the clamping portion of the twist drill, connecting to the machine tool spindle and transmitting torque and axial force. Shanks typically come in straight or tapered shanks. Straight shanks are suitable for small twist drills and can be clamped in a drill chuck; tapered shanks are suitable for larger twist drills and can be inserted directly into the tapered hole of the machine tool spindle. The neck, located between the shank and the working section, is typically engraved with markings such as the brand, drill diameter, and material. The working section is the primary cutting portion of the twist drill and consists of a cutting section and a guide section.

[0003] For example, Chinese patent publication number CN217192793U discloses a high-efficiency twist drill with a stepped drill tip, comprising: a drill rod; two opposing spiral chip flutes disposed on the drill rod, the spiral chip flutes being formed to expose a spiral drill blade, the spiral drill blades converging at the front end of the drill rod to form a first cutting surface and a second cutting surface; stepped reinforcement portions disposed on the first and second cutting surfaces, respectively, the stepped reinforcement portions comprising a first step portion, a second step portion, a third step portion, and a fourth step portion; V-shaped cutting grooves disposed on the first and third steps, respectively, and closely spaced laterally; and reinforcement blocks disposed on the second and fourth steps, respectively, at even intervals. The utility model significantly improves cutting efficiency by providing the V-shaped cutting grooves; and by providing the reinforcement blocks, the strength of the first and second cutting surfaces is enhanced, while also accelerating drilling speed.

[0004] Although the above example can speed up the drilling speed to a certain extent by setting up multiple cutting surfaces and stepped portions, the drill bit with this structure will cause the temperature of the drill bit to rise sharply during the drilling process due to intense friction with the material, which will affect the drilling efficiency. At the same time, the drill bit is easily damaged due to excessive temperature, which causes certain inconveniences in use. Utility Model Content

[0005] The utility model provides a high-efficiency twist drill with a stepped drill point to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A high-efficiency twist drill with a stepped drill point includes a drill bit assembly, an infusion assembly fixedly connected to the surface of the drill bit assembly, the infusion assembly including a mounting plate, a first shell with an injection hole provided on the surface of the mounting plate fixedly connected to the bottom, a slide rail fixedly connected to the inner wall of the first shell, a sliding sleeve slidably connected to the surface of the slide rail, a second shell fixedly connected to the bottom of the sliding sleeve, and the inner wall of the second shell fixedly connected to the surface of the drill bit assembly.

[0008] A further improvement of the technical solution of the present utility model is that: the injection hole opened on the surface of the first shell is connected to the infusion tube of the external infusion component, and the inner cavities of the first shell and the second shell are in a sealed state.

[0009] A further improvement of the technical solution of the present utility model is that: the drill bit assembly comprises a drill body, and the top of the drill body is fixedly connected with a mounting portion.

[0010] A further improvement of the technical solution of the present invention is that: a chip removal groove is provided on the surface of the drill body, and an inner wall of the chip removal groove is provided with a reaming blade.

[0011] A further improvement of the technical solution of the present invention is that a drill tip is provided at the bottom of the drill body, and a stepped reaming blade is provided at one end of the drill body close to the drill tip.

[0012] A further improvement of the technical solution of the present utility model is that a liquid inlet hole is provided on the surface of the upper end of the drill body, a liquid guide groove is provided at the bottom of the inner cavity of the liquid inlet hole, and a liquid outlet hole is provided at the bottom of the inner cavity of the liquid guide groove.

[0013] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:

[0014] The utility model provides a high-efficiency twist drill with a stepped drill point. Through the arrangement of the infusion component, coolant can be injected into the liquid guide groove along the liquid inlet hole during the rotation of the drill bit component, so that the coolant is ejected from the liquid outlet hole, and the drill bit is directly cooled from the drill tip. The coolant flowing out along the chip discharge groove can also cool the drill body again during the outflow process, thereby preventing the drill tip temperature from being too high and affecting the drilling efficiency. At the same time, the arrangement of the reaming blade and the drill bit with the stepped reaming blade can also speed up the drilling speed of the drill bit, making the drilling more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the bottom-up structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the exploded structure of the utility model;

[0018] Figure 4 This is a schematic cross-sectional view of the utility model;

[0019] Figure 5 For the utility model Figure 3 A in the middle is an enlarged structural diagram;

[0020] Figure 6 For the utility model Figure 4 Enlarged structural diagram at point B in the middle.

[0021] In the figure: 1. Drill bit assembly; 11. Drill body; 12. Mounting portion; 13. Chip removal groove; 14. Reaming blade; 15. Drill tip; 16. Stepped reamer blade; 17. Liquid inlet hole; 18. Liquid guide groove; 19. Liquid outlet hole; 2. Infusion assembly; 21. Mounting plate; 22. First shell; 23. Slide rail; 24. Sleeve; 25. Second shell. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the embodiments:

[0023] Example 1

[0024] like Figure 1-6 As shown, the utility model provides a high-efficiency twist drill with a stepped drill point, including a drill assembly 1, an infusion assembly 2 is fixedly connected to the surface of the drill assembly 1, the infusion assembly 2 includes a mounting plate 21, the bottom of the mounting plate 21 is fixedly connected to a first shell 22 with an injection hole on the surface, the inner wall of the first shell 22 is fixedly connected to a slide rail 23, the surface of the slide rail 23 is slidably connected to a slide sleeve 24, the bottom of the slide sleeve 24 is fixedly connected to a second shell 25, and the inner wall of the second shell 25 is fixedly connected to the surface of the drill assembly 1.

[0025] In this embodiment, during use, after connecting the mounting portion 12 to the driving spindle, the infusion tube of the external infusion component is connected to the injection hole opened on the surface of the first shell 22, and the mounting piece 21 is connected to the external component, so that the coolant enters the closed cavity between the first shell 22 and the second shell 25. Subsequently, during the drilling process, the coolant enters the drill body 11 from the liquid inlet hole 17, passes through the liquid guide groove 18, and is sprayed out from the liquid outlet hole 19 to cool the drill tip 15.

[0026] Example 2

[0027] like Figure 1-6As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the surface of the drill bit assembly 1 is fixedly connected to the infusion assembly 2, the infusion assembly 2 includes a mounting plate 21, the bottom of the mounting plate 21 is fixedly connected to a first shell 22 with an injection hole on the surface, the inner wall of the first shell 22 is fixedly connected to a slide rail 23, the surface of the slide rail 23 is slidably connected to a sleeve 24, the bottom of the sleeve 24 is fixedly connected to a second shell 25, the inner wall of the second shell 25 is fixedly connected to the surface of the drill bit assembly 1, the injection hole opened on the surface of the first shell 22 is connected to the infusion tube of the external infusion component, the inner cavities of the first shell 22 and the second shell 25 are in a sealed state, the drill bit assembly 1 includes a drill body 11, the top of the drill body 11 is fixedly connected to a mounting portion 12, the surface of the drill body 11 is provided with a chip groove 13, and the inner wall of the chip groove 13 is provided with a reaming blade 14.

[0028] In this embodiment, during the drilling process, the drill body 11 drives the second housing 25 to rotate, causing the sliding sleeve 24 to rotate along the sliding rail 23, while the first housing 22 remains stationary, so that the infusion tube shell continues to inject coolant into the first housing 22.

[0029] Example 3

[0030] like Figure 1-6 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the surface of the drill assembly 1 is fixedly connected to the infusion assembly 2, the infusion assembly 2 includes a mounting plate 21, the bottom of the mounting plate 21 is fixedly connected to a first shell 22 with a liquid injection hole on the surface, the inner wall of the first shell 22 is fixedly connected to a slide rail 23, the surface of the slide rail 23 is slidably connected to a sleeve 24, the bottom of the sleeve 24 is fixedly connected to a second shell 25, the inner wall of the second shell 25 is fixedly connected to the surface of the drill assembly 1, a drill tip 15 is provided at the bottom of the drill body 11, a stepped reaming blade 16 is provided at one end of the drill body 11 close to the drill tip 15, a liquid inlet hole 17 is provided on the surface of the upper end of the drill body 11, a liquid guide groove 18 is provided at the bottom of the inner cavity of the liquid guide groove 18, and a liquid outlet hole 19 is provided at the bottom of the inner cavity of the liquid guide groove 18.

[0031] In this embodiment, when drilling a hole, the drill tip 15 first cuts a groove on the surface of the material, and then the groove is enlarged in multiple times by multiple stepped edges with gradually increasing surface diameters of the stepped reaming blade 16, so that the drill body 11 can be partially inserted into the material. The setting of the stepped reaming can reduce the force on the drill bit. At the same time, the setting of the reaming blade 14 can also assist in reaming and improve the drilling efficiency.

[0032] The following is a detailed description of the working principle of the high-efficiency twist drill with a stepped drill point.

[0033] like Figure 1-6As shown, during use, after the mounting portion 12 is connected to the driving spindle, the infusion tube of the external infusion member is connected to the injection hole opened on the surface of the first shell 22, and the mounting piece 21 is connected to the external member, so that the coolant enters the closed cavity between the first shell 22 and the second shell 25. Subsequently, during the drilling process, the coolant enters the drill body 11 from the liquid inlet hole 17, passes through the liquid guide groove 18, and is ejected from the liquid outlet hole 19 to cool the drill tip 15. During the drilling process, the drill body 11 drives the second The shell 25 rotates, causing the sleeve 24 to rotate along the slide rail 23, and the first shell 22 remains stationary, so that the infusion tube shell continues to inject coolant into the first shell 22. When drilling a hole, the drill tip 15 first cuts a groove on the surface of the material, and then the stepped reaming blade 16 with multiple stepped edges with gradually increasing surface diameters expands the groove in multiple times, so that the drill body 11 can be partially inserted into the material. The setting of the stepped reaming can reduce the force on the drill bit. At the same time, the setting of the reaming blade 14 can also assist in reaming and improve the drilling efficiency.

[0034] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A high-efficiency twist drill with a stepped drill tip, comprising a drill bit assembly (1), characterized in that: The surface of the drill assembly (1) is fixedly connected to an infusion assembly (2), and the infusion assembly (2) comprises a mounting plate (21), the bottom of the mounting plate (21) is fixedly connected to a first shell (22) with an injection hole on the surface, the inner wall of the first shell (22) is fixedly connected to a slide rail (23), the surface of the slide rail (23) is slidably connected to a slide sleeve (24), the bottom of the slide sleeve (24) is fixedly connected to a second shell (25), and the inner wall of the second shell (25) is fixedly connected to the surface of the drill assembly (1).

2. The high-efficiency twist drill with a stepped drill point according to claim 1, characterized in that: The injection hole provided on the surface of the first shell (22) is connected to the infusion tube of the external infusion component, and the inner cavities of the first shell (22) and the second shell (25) are in a sealed state.

3. The high-efficiency twist drill with a stepped drill point according to claim 1, characterized in that: The drill head assembly (1) comprises a drill body (11), and a mounting portion (12) is fixedly connected to the top of the drill body (11).

4. The high-efficiency twist drill with a stepped drill point according to claim 3, characterized in that: A chip removal groove (13) is provided on the surface of the drill body (11), and a reaming blade (14) is provided on the inner wall of the chip removal groove (13).

5. The high-efficiency twist drill with a stepped drill point according to claim 4, characterized in that: A drill tip (15) is provided at the bottom of the drill body (11), and a stepped reaming blade (16) is provided at one end of the drill body (11) close to the drill tip (15).

6. The high-efficiency twist drill with a stepped drill point according to claim 5, characterized in that: A liquid inlet hole (17) is provided on the surface of the upper end of the drill body (11), a liquid guide groove (18) is provided at the bottom of the inner cavity of the liquid inlet hole (17), and a liquid outlet hole (19) is provided at the bottom of the inner cavity of the liquid guide groove (18).

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