Asymmetric hard alloy drilling piece
By designing asymmetric carbide drills, the combination of multiple cutting edges and inclined cutting edges is used to solve the problem of inaccurate centering of existing drills on high hardness materials, achieving a more efficient and accurate drilling effect, and extending the service life of the drills.
Patent Information
- Application Number
- CN202420471959.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-03-12
AI Technical Summary
The existing symmetrical design drill sheets are prone to inaccurate centering when drilling, especially on high hardness materials, which leads to increased drilling difficulty, high product scrap rate and increased use cost.
An asymmetric carbide drill piece is designed. By setting multiple cutting edges on both sides of the drill piece main body and setting an inclined cutting edge between the cutting edges, a unique cutting trajectory is formed, which improves drilling efficiency and accurate positioning ability.
The asymmetric design improves drilling efficiency, enhances the chip removal and heat dissipation capabilities of the drilling sheet, extends the service life, and achieves more accurate and fast drilling on crisp and hard materials, improving drilling efficiency and quality.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cutting tools, in particular to an asymmetric hard alloy drill piece. Background Art
[0002] The slotted drill drilling tools currently available on the market are mainly composed of a drill bit and a drill rod fixedly welded to the drill bit. One end of the drill rod is welded to the bottom surface of the drill bit, and the other end of the drill rod is clamped into the fixture of the drilling rig. The drill bit contacts the material to be drilled. Due to the rotation and axial movement of the drill rod, the drill bit can grind the required hole in the material to be drilled.
[0003] In the prior art, most of the slotted drill bits are symmetrically designed, with cutting edges that are regularly and symmetrically distributed on both sides. The bottom surface is a plane, which serves as a welding surface. The slotted drill bit has only two cutting edges. During use, since the contact point between the drill tip and the material to be punched is a point or a line, the drilling is self-centering. When encountering a smooth and hard material surface, the drilling is easily inaccurately centered, or often slips during drilling, which will cause the drill bit and the force point of the material to be punched to slide. This not only increases the difficulty of drilling, resulting in an increase in the product scrap rate, but also easily affects the use effect and increases the product's use cost. Utility Model Content
[0004] The utility model aims to provide an asymmetric carbide drill bit to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an asymmetric cemented carbide drill bit, comprising a drill bit main body, wherein cutting edge one, cutting edge two, cutting edge four and cutting edge five are respectively arranged on both sides of the drill bit main body, and the cutting edge one, cutting edge two and cutting edge four and cutting edge five are asymmetric structures, an inclined cutting edge three is arranged between the cutting edge two and the cutting edge four, and a horizontal welding surface is arranged at the lower end of the drill bit main body.
[0006] Preferably, the vertical distance between the two end points of the cutting edge is 0.6 mm-0.8 mm.
[0007] Preferably, the inclination angle of the second cutting edge relative to the vertical direction of the drill bit body is 13°-20°.
[0008] Preferably, the inclination angle of the cutting edge 4 relative to the vertical direction of the drill bit body is 25°-32°.
[0009] Preferably, the diameter of the welding surface is 4.3 mm-12.6 mm, and the thickness of the drill piece body is 0.8 mm-2.0 mm.
[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the drill bit body is designed with an asymmetrical structure. Compared with the existing symmetrically designed drill bits, it has 5 different cutting edges. Through the research and design of mechanical principles, the alloy drill bit forms a unique cutting trajectory during drilling operations, which not only improves the drilling efficiency, but also is beneficial to the drill bit chip removal and heat dissipation, and further improves the service life of the drill bit; in addition, during drilling operations, due to the asymmetrical design, a cross-changing drilling center will be generated, which is more conducive to accurate positioning and rapid hole entry on brittle and hard tiles or glass than the traditional symmetrical drill bit with one point self-centering, and has high drilling efficiency and good drilling quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is the front view of the utility model;
[0012] Figure 2 It is a side view of the utility model.
[0013] In the figure:
[0014] 1. Cutting edge one; 2. Cutting edge two; 3. Cutting edge three; 4. Cutting edge four; 5. Cutting edge five; 6. Welding surface. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0016] See also Figure 1-2, an asymmetric cemented carbide drill bit, comprising a drill bit body, wherein a cutting edge 1, a cutting edge 2, a cutting edge 4, and a cutting edge 5 are respectively arranged on both sides of the drill bit body, and the cutting edge 1, the cutting edge 2 and the cutting edge 4, the cutting edge 5 are an asymmetric structure, an inclined cutting edge 3 3 is arranged between the cutting edge 2 2 and the cutting edge 4 4, a horizontal welding surface 6 is arranged at the lower end of the drill bit body, a vertical distance between the two end points of the cutting edge 3 3 is 0.6mm-0.8mm, an inclination angle of the cutting edge 2 2 relative to the vertical direction of the drill bit body is 13°-20°, an inclination angle of the cutting edge 4 4 relative to the vertical direction of the drill bit body is 25°-32°, and the welding surface 6 The diameter is 4.3mm-12.6mm, the thickness of the drill body is 0.8mm-2.0mm, the drill body is designed with an asymmetrical structure, and compared with the existing symmetrical drill, it has 5 different cutting edges. Through the research and design of mechanical principles, the alloy drill forms a unique cutting trajectory during drilling operation, which not only improves the drilling efficiency, but also is conducive to chip removal and heat dissipation of the drill, and further improves the service life of the drill; in addition, during drilling operation, due to the asymmetrical design, a cross-changing drilling center will be generated, which is more conducive to accurate positioning and rapid hole entry on brittle and hard tiles or glass than the traditional symmetrical drill with one point self-centering, and has high drilling efficiency and good drilling quality.
[0017] In view of the above data, this application lists the following embodiments.
[0018] Example 1: The welding surface 6 is a 4.4 mm hard alloy drill bit, and the specific parameters are as follows:
[0019] (1) The length of the cutting edge 1 is 3.2 mm, and the length of the cutting edge 5 is 3.8 mm;
[0020] (2) the inclination angle of the cutting edge 2 relative to the vertical direction of the drill bit body is 20°, and the inclination angle of the cutting edge 4 relative to the vertical direction of the drill bit body is 32°;
[0021] (3) The vertical distance between the two end points of the cutting edge 3 is 0.6 mm;
[0022] (4) The total height of the drill body is 6.7 mm and the thickness is 0.85 mm.
[0023] The drill bit is obtained by welding the cemented carbide drill piece of the above-mentioned specification provided in Example 1 of the utility model to a drill base body of matching specification.
[0024] Example 2: The welding surface 6 is a 12.46 mm hard alloy drill bit, and the specific parameters are as follows:
[0025] (1) The length of the cutting edge 1 is 4.5 mm, and the length of the cutting edge 5 is 7 mm;
[0026] (2) the inclination angle of the cutting edge 2 relative to the vertical direction of the drill bit body is 15°, and the inclination angle of the cutting edge 4 relative to the vertical direction of the drill bit body is 25°;
[0027] (3) The vertical distance between the two end points of the cutting edge 3 is 0.8 mm;
[0028] (4) The total height of the drill body is 18.7 mm and the thickness is 1.95 mm.
[0029] The drill bit is obtained by welding the cemented carbide drill piece of the above-mentioned specifications provided in Example 2 of the utility model to a drill base body of matching specifications.
[0030] Example 3: The welding surface 6 is a 8.46 mm hard alloy drill bit, and the specific parameters are as follows:
[0031] (1) The length of cutting edge 1 is 4.5 mm, and the length of cutting edge 5 is 5.6 mm;
[0032] (2) the inclination angle of the cutting edge 2 relative to the vertical direction of the drill bit body is 13°, and the inclination angle of the cutting edge 4 relative to the vertical direction of the drill bit body is 25°;
[0033] (3) The vertical distance between the two end points of the cutting edge 3 is 0.8 mm;
[0034] (4) The total height of the drill body is 13.6 mm and the thickness is 1.55 mm.
[0035] The drill bit is obtained by welding the cemented carbide drill piece of the above-mentioned specifications provided in Example 3 of the present invention to a drill base body of matching specifications.
[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. An asymmetric carbide drill bit, characterized in that: It includes a drill bit body, and cutting edges 1, 2, 4 and 5 are respectively arranged on both sides of the drill bit body, and the cutting edges 1, 2, 4 and 5 are asymmetrical structures. An inclined cutting edge 3 is arranged between the cutting edge 2 and the cutting edge 4, and a horizontal welding surface is arranged at the lower end of the drill bit body.
2. The asymmetric carbide drill bit according to claim 1, characterized in that: The vertical distance between the two end points of the cutting edge is 0.6mm-0.8mm.
3. The asymmetric cemented carbide drill bit according to claim 1, characterized in that: The inclination angle of the second cutting edge relative to the vertical direction of the drill bit body is 13°-20°.
4. The asymmetric carbide drill bit according to claim 1, characterized in that: The inclination angle of the cutting edge 4 relative to the vertical direction of the drill bit body is 25°-32°.
5. The asymmetric cemented carbide drill bit according to claim 1, characterized in that: The diameter of the welding surface is 4.3mm-12.6mm, and the thickness of the drill piece body is 0.8mm-2.0mm.