Drill bit for drilling water stop rubber and drilling device

Abstract

The utility model discloses a drill bit for water stop rubber drilling, which comprises a hollow drill bushing, a positioning drill rod and a clamped head, one end of the hollow drill bushing and one end of the positioning drill rod are both fixed on the clamped head and are coaxially arranged, and the other end of the positioning drill rod extends out of the other end of the hollow drill bushing. The end face of the other end of the hollow drill bushing is provided with at least two spiral faces arranged around the center at intervals, the adjacent spiral faces are connected through axial faces, the axial faces are connected with the outwards-protruding ends of the spiral faces to form drilling tips, and a chip removal opening is formed in the hollow drill bushing. The utility model further discloses a drilling device for drilling the water stop rubber, the drilling device comprises a drilling machine and a drill bit for drilling the water stop rubber, and the drill bit is clamped and fixed on the drilling machine by the chuck. The drill bit for drilling the water stop rubber and the drilling device are smooth in cutting and convenient for chip removal and cleaning.

Description

Technical Field

[0001] The utility model relates to the technical field of water-stop rubber processing equipment, in particular to a drill bit and a drilling device for drilling holes in water-stop rubber. Background Art

[0002] With the rise of pumped storage power stations, the gate water seals need to be processed in place in the factory. In addition to the gate water seal rubber, the gate slider, the side guide support seat rubber pad, the flush valve water stop rubber and other parts need to be drilled to meet the rubber assembly and water stopping requirements. At present, solid drill bits are generally used for drilling water stop rubber. Due to the shrinkage of rubber, on the one hand, during the drilling process, the drill bit needs to be frequently pulled out to clean the sheared rubber in the punch, which is cumbersome. On the other hand, the solid drill bit presses on the water stop rubber over a large area, causing large deformation of the water stop rubber, low drilling accuracy, and easy drilling of too large holes, resulting in water leakage in the rubber at the hole, and failing to meet the water stopping requirements.

[0003] Patent document 95117221.2 discloses a drilling head having a hollow drill bit and a pilot drill bit. The drilling head comprises a hollow drill bit and a pilot drill bit, wherein the pilot drill bit is composed of a clamping rod and a drill bit that are integrally connected. To accommodate hollow drill bits of varying diameters and adapt to various applications and drive devices, a detachable connection is employed between the hollow drill bit and the pilot drill bit. The pilot drill bit is provided with a clamping rod at its end opposite the drilling direction and a drill bit at its end facing the drilling direction. The clamping rod is provided with a conventional slot into which a torque transmission element of the drive device is inserted. The hollow drill bit is conventionally designed in a bell-shaped manner, with a cutting blade at its top facing the drilling direction. The drill bit extends out of the top of the hollow drill bit, which is provided with the cutting blade, in the drilling direction. The drilling power head has the following shortcomings: 1) The hollow drill bit uses a cutting blade for cutting and drilling, which is not convenient for chip removal; 2) The hollow drill bit is not provided with a chip removal port, and the cut material is easily blocked in the hollow drill bit, resulting in drilling being impossible and difficult to clean; 3) The center drill uses a twist drill bit. If it is used for drilling water-stop rubber, the circumferential force on the water-stop rubber is large during the drilling process, which can easily cause the drilling part of the water-stop rubber to deform significantly, and ultimately cause the drilled hole size to fail to meet the standard and fail to meet the water-stop requirements. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a drill bit and a drilling device for drilling water-stop rubber which have the advantages of smooth cutting, convenient chip removal and cleaning.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A drill bit for drilling holes in water-stop rubber comprises a hollow drill sleeve, a positioning drill rod and a chuck. One end of the hollow drill sleeve and the positioning drill rod are fixed on the chuck and are coaxially arranged. The other end of the positioning drill rod extends from the other end of the hollow drill sleeve. The other end surface of the hollow drill sleeve is provided with at least two spiral surfaces arranged around the center at intervals. Adjacent spiral surfaces are connected by axial surfaces. The axial surfaces are connected to the outer convex ends of the spiral surfaces to form a drilling tip. A chip removal port is provided on the hollow drill sleeve.

[0007] As a further improvement of the above technical solution:

[0008] The axial distances between the drilling tips and the end face of the positioning drill rod are different.

[0009] The extending direction of the axial surface is parallel to the axial direction of the hollow drill sleeve.

[0010] The hollow drill sleeve is provided with a chip removal groove connected to an axial surface.

[0011] The extending direction of the chip removal groove is parallel to the axial direction of the hollow drill sleeve.

[0012] The other end of the positioning drill rod is conical.

[0013] The hollow drill sleeve is coaxially sleeved with the chuck and can be detachably fixed.

[0014] The hollow drill sleeve and the chuck are fixed in position by a positioning pin.

[0015] The positioning drill rod is a copper alloy rod.

[0016] A drilling device for drilling holes in water-stop rubber comprises a drilling rig and the above-mentioned drill bit for drilling holes in water-stop rubber, wherein the chuck is clamped and fixed on the drilling rig.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] The drilling process of the drill bit for drilling holes in water-stop rubber of the utility model is as follows: one end of the positioning drill rod extending out of the hollow drill sleeve also rests on the center of the position of the water-stop rubber to be drilled, and is first drilled into the water-stop rubber to provide a centering effect for the subsequent cutting and hole-forming of the hollow drill sleeve; until the hollow drill sleeve contacts the water-stop rubber, with further drilling, the hollow drill sleeve cuts the water-stop rubber through the drill tip, and the chips enter the space between the inner peripheral surface of the hollow drill sleeve and the outer peripheral surface of the positioning drill rod under the guidance of the spiral surface, and can be discharged through the chip discharge port. The drill bit for drilling holes in water-stop rubber, on the one hand, the hollow drill sleeve cuts and discharges chips through the cooperation of the drill tip and the spiral surface, and the cutting is smooth and the chip discharge is convenient; on the other hand, the hollow drill sleeve is provided with a chip discharge port, which is convenient for both discharging waste chips in the hollow drill sleeve and cleaning the removed materials in the hollow drill sleeve.

[0019] The utility model discloses a drilling device for drilling holes in water-stop rubber, comprising a drill bit for drilling holes in water-stop rubber, and has all the advantages of a drill bit for drilling holes in water-stop rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the drill bit for drilling water-stop rubber from the first perspective of the utility model.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the drill bit for drilling water-stop rubber from a second viewing angle of the utility model.

[0022] Figure 3 It is a schematic diagram of the main cross-sectional structure of the drill bit for drilling holes in water-stop rubber according to the present invention.

[0023] Figure 4 This is a schematic structural diagram of a drilling device for drilling holes in water-stop rubber according to the present invention.

[0024] The numbers in the figure represent:

[0025] 1. Hollow drill sleeve; 11. Helical surface; 2. Positioning drill rod; 3. Chuck; 4. Axial surface; 5. Drill tip; 6. Chip removal port; 7. Chip removal groove; 8. Positioning pin; 9. Drilling machine. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0029] In this utility model, unless otherwise specified or limited, the terms "assemble," "connect," "connect," "fix," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0030] Example 1:

[0031] Figures 1 to 3 An embodiment of the utility model of a drill bit for drilling holes in water-stop rubber is shown. The drill bit for drilling holes in water-stop rubber of this embodiment includes a hollow drill sleeve 1, a positioning drill rod 2 and a chuck 3. One end of the hollow drill sleeve 1 and the positioning drill rod 2 are fixed on the chuck 3 and are coaxially arranged. The other end of the positioning drill rod 2 extends from the other end of the hollow drill sleeve 1. At least two spiral surfaces 11 arranged around the center are provided on the end face of the other end of the hollow drill sleeve 1. Adjacent spiral surfaces 11 are connected by an axial surface 4. The axial surface 4 is connected to the outer convex end of the spiral surface 11 to form a drilling tip 5. A chip removal port 6 is provided on the hollow drill sleeve 1.

[0032] Drilling process: One end of the positioning drill rod 2 extending out of the hollow drill sleeve 1 also rests against the center of the position where the water-stop rubber is to be drilled, and is first drilled into the water-stop rubber to provide a centering effect for the subsequent cutting and hole-forming of the hollow drill sleeve 1; until the hollow drill sleeve 1 contacts the water-stop rubber, with further drilling, the hollow drill sleeve 1 cuts the water-stop rubber through the drilling tip 5, and the chips enter the space between the inner circumference of the hollow drill sleeve 1 and the outer circumference of the positioning drill rod 2 under the guidance of the spiral surface 11, and can be discharged through the chip discharge port 6. In this drill bit for drilling water-stop rubber, on the one hand, the hollow drill sleeve 1 cuts and discharges chips through the cooperation of the drilling tip 5 and the spiral surface 11, and the cutting is smooth and the chip discharge is convenient; on the other hand, the hollow drill sleeve 1 is provided with a chip discharge port 6, which is convenient for both discharging waste chips in the hollow drill sleeve 1 and cleaning the removed materials in the hollow drill sleeve 1.

[0033] Furthermore, in this embodiment, the axial distances between each drilling tip 5 and the end surface of the positioning drill rod 2 are different. This allows the drilling tip 5 with a closer axial distance to the end surface of the positioning drill rod 2 to cut first, while the drilling tip 5 with a greater axial distance to the end surface of the positioning drill rod 2 cuts later. This simultaneous cutting reduces cutting force and improves chip removal. Of course, in other embodiments, the axial distances between each drilling tip 5 and the end surface of the positioning drill rod 2 can also be the same.

[0034] Furthermore, in this embodiment, the extending direction of the axial surface 4 is parallel to the axial direction of the hollow drill sleeve 1, which is beneficial to improving the sharpness of the drill tip 5 and removing chips.

[0035] Furthermore, if Figure 1 As shown, in this embodiment, the hollow drill sleeve 1 is provided with a chip removal groove 7 connected to an axial surface 4, thereby further improving the chip removal capacity.

[0036] Furthermore, in this embodiment, the extending direction of the chip removal groove 7 is parallel to the axial direction of the hollow drill sleeve 1. On the one hand, it is convenient for processing, and on the other hand, the chip removal effect is also good.

[0037] Furthermore, in this embodiment, the other end of the positioning drill rod 2 is conical, which is convenient for drilling into the water-stop rubber.

[0038] Furthermore, in this embodiment, the hollow drill sleeve 1 and the chuck 3 are coaxially sleeved and detachably fixed, making them easy to disassemble and replace.

[0039] Furthermore, in this embodiment, the hollow drill sleeve 1 and the chuck 3 are fixed by a positioning pin 8. Specifically, the positioning pin 8 is radially penetrated through the hollow drill sleeve 1 and the chuck 3 to fix the hollow drill sleeve 1 and the chuck 3 circumferentially and axially, with a simple structure and easy assembly and disassembly.

[0040] Furthermore, in this embodiment, the positioning drill rod 2 is a copper alloy rod. The copper alloy rod has good toughness and is suitable for drilling into elastic water-stop rubber.

[0041] Example 2:

[0042] Figure 4 An embodiment of the present invention's drilling device for drilling holes in waterproof rubber is shown. This embodiment includes a drill rig 9 and the drill bit for drilling holes in waterproof rubber described in Example 1, which is clamped to the drill rig 9 by a chuck 3. The drill rig 9 provides power for the drill bit's rotation. This drilling device, including the drill bit, offers all the advantages of a conventional drill bit.

[0043] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the present invention, or modify it into equivalent embodiments with equivalent variations. Therefore, any simple modifications, equivalent variations, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the scope of protection of the present invention.

Claims

1. A drill bit for drilling water-stop rubber, comprising a hollow drill sleeve (1), a positioning drill rod (2) and a chuck (3), characterized in that: One end of the hollow drill sleeve (1) and the positioning drill rod (2) are both fixed on the chuck (3) and coaxially arranged. The other end of the positioning drill rod (2) extends from the other end of the hollow drill sleeve (1). The other end surface of the hollow drill sleeve (1) is provided with at least two spiral surfaces (11) spaced around the center. Adjacent spiral surfaces (11) are connected by an axial surface (4). The axial surface (4) is connected to the outer convex end of the spiral surface (11) to form a drilling tip (5). A chip removal port (6) is provided on the hollow drill sleeve (1).

2. The drill bit for drilling water-stop rubber according to claim 1, characterized in that: The axial distances between each drilling tip (5) and the end face of the positioning drill rod (2) are different.

3. The drill bit for drilling water-stop rubber according to claim 1, characterized in that: The extension direction of the axial surface (4) is parallel to the axial direction of the hollow drill sleeve (1).

4. The drill bit for drilling water-stop rubber according to claim 1, characterized in that: The hollow drill sleeve (1) is provided with a chip removal groove (7) connected to an axial surface (4).

5. The drill bit for drilling water-stop rubber according to claim 4, characterized in that: The extending direction of the chip removal groove (7) is parallel to the axial direction of the hollow drill sleeve (1).

6. The drill bit for drilling water-stop rubber according to any one of claims 1 to 5, characterized in that: The other end of the positioning drill rod (2) is conical.

7. The drill bit for drilling water-stop rubber according to any one of claims 1 to 5, characterized in that: The hollow drill sleeve (1) is coaxially sleeved with the chuck (3) and can be detachably fixed.

8. The drill bit for drilling water-stop rubber according to claim 7, characterized in that: The hollow drill sleeve (1) and the chuck (3) are fixed in position by a positioning pin (8).

9. The drill bit for drilling water-stop rubber according to any one of claims 1 to 5, characterized in that: The positioning drill rod (2) is a copper alloy rod.

10. A drilling device for drilling holes in water-stop rubber, characterized in that: The invention comprises a drilling machine (9) and a drill bit for drilling water-stop rubber according to any one of claims 1 to 9, wherein the chuck (3) is clamped and fixed on the drilling machine (9).

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