Centering two-edge drill bit
By adding a central centering drill tip and an inclined linear edge on both sides of the top of the drill core of the two-edged drill bit, the problem of the existing two-edged drill bit deviating the drill core position due to excessive cutting force during the processing process is solved, and the drill bit is accurately positioned on the material surface and has high cutting accuracy.
Patent Information
- Application Number
- CN202420633412.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-03-29
AI Technical Summary
During the processing process, the existing two-edged drill bits have a deviation in the drill core position due to excessive cutting force, resulting in the processing reference and the design reference not overlapping, resulting in insufficient dimensional accuracy of the parts.
Design a centering two-edged drill bit, by adding a central centering drill tip on both sides of the top of the drill core and forming an inclined linear edge, ensuring that the drill tip is accurately positioned on the material surface and guiding the cutting insert into the material.
Through the protruding angle and edge design of the drill tip, the drill bit can be accurately positioned and guided during the cutting process, so as to keep the hole position accurate without deviation and high cutting accuracy.
Smart Images
Figure CN222890598U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of two-edged drill bits, in particular to a centering two-edged drill bit. Background Art
[0002] A two-edged drill bit is a drill bit that is commonly used for drilling. It has two cutting edges, which allows it to cut through materials more effectively when used, improving the efficiency of drilling. Two-edged drill bits are commonly used for drilling various materials such as wood, metal, plastic, etc. This design allows the drill bit to cut through materials more quickly without generating too much friction and heat.
[0003] At present, two-edged drill bits are generally used for machining steel, cast iron, and non-ferrous metal thin-walled parts. During the machining process, since the drill bit generally extends from the blade to the center of the drill bit body to form a rotating drill tip structure, the drill core position deviates due to excessive cutting force during the machining process, there are errors caused by the inability to coincide with the machining datum and the design datum, and the dimensional accuracy of the parts is insufficient.
[0004] As mentioned above, we have designed a centering two-edged drill bit to solve the above problems. Summary of the invention
[0005] The utility model aims to solve the shortcomings in the prior art and provides a centering two-edged drill bit.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A centering two-edged drill bit comprises a drill bit body, wherein the drill bit body comprises a shank and an edge portion fixedly connected to one end of the shank.
[0008] The blade is a two-edged structure, and the two ends of the blade away from the handle are rotated to form a protruding center drill tip, and the angle of the center drill tip is set at 90° to 120°;
[0009] One side of the center spot drill tip is tilted inward by 30° to 60° to form a main cutting edge, and the other side of the center spot drill tip is tilted outward by 120° to 135° to form a straight cutting edge. An end of the straight cutting edge away from the center spot drill tip forms a sharp-angled drill tip shoulder between the two edges of the blade.
[0010] Preferably, a cutting groove is provided between the two-edged structures of the cutting edge.
[0011] Preferably, four main cutting edges and four straight cutting edges are provided, and inclined chip grooves are provided on the inner sides of the main cutting edges.
[0012] Preferably, the sharp angle of the drill tip shoulder is 120°±2°.
[0013] Preferably, the drill tip shoulder and the straight cutting edge are connected to form two flank surfaces.
[0014] Preferably, the connection between the handle and the blade is a downwardly inclined slope structure.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] 1. Adding center drill tips on both sides of the top of the drill core and forming inclined straight edges can protrude the position angle of the center drill tip and the edge of the drill core. This drill bit design has an angle such as a protruding center drill tip, which enables the drill tip to be accurately positioned on the material surface and guide the cutting blade into the material. This angle can help the drill bit to be correctly positioned and ensure that the hole position will not deviate.
[0017] 2. The other side of the center drill tip is tilted outward 120° to 135° to form a straight edge, which helps ensure that the cutting blade cuts along the predetermined path, thereby maintaining the accuracy of the hole. The straight edge can provide a more stable cutting surface and reduce errors during the cutting process;
[0018] In this embodiment, through the protruding angle of the drill tip and the cutting edge design, the drill bit can be accurately positioned and guided during the cutting process, thereby maintaining the position of the hole accurately without deviation and achieving high cutting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a structural schematic diagram of a centering two-edged drill bit proposed by the utility model;
[0020] Figure 2 The utility model is a side view of a centering two-edged drill bit.
[0021] In the figure: 1 drill body, 2 straight cutting edge, 3 drill tip shoulder, 4 second back cutting surface, 5 cutting groove, 6 cutting edge, 7 shank, 8 center centering drill tip, 9 main cutting edge. DETAILED DESCRIPTION
[0022] In order to make the technical means, creative features, objectives and effects of the utility model easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments.
[0023] Embodiment 1
[0024] Reference Figure 1-2A centering two-edged drill bit comprises a drill bit body 1, the drill bit body 1 comprises a shank 7 and a blade 6 fixedly connected to one end of the shank 7, the connection between the shank 7 and the blade 6 is a downwardly inclined slope structure, and a knife groove 5 is arranged between the two-edged structures of the blade 6;
[0025] In this embodiment, the blade 6 is a two-edged structure, and the two ends of the blade 6 away from the handle 7 are rotated to form a protruding center drill tip 8, and the angle of the center drill tip 8 is set at 90° to 120°;
[0026] More specifically, one side of the center spot drill tip 8 is inclined inwardly by 30° to 60° to form a main cutting edge 9, and the other side of the center spot drill tip 8 is inclined outwardly by 120° to 135° to form a straight cutting edge 2, and a sharp-angled drill tip shoulder 3 is formed between one end of the straight cutting edge 2 away from the center spot drill tip 8 and the two edges of the cutting edge 6;
[0027] By adding the center centering drill tip 8 on both sides of the top of the drill core and forming the inclined straight cutting edge 2, the position angle of the center centering drill tip 8 and the cutting edge 2 at the drill core can be protruded. The design of this drill bit has an angle (such as the protruding center centering drill tip 8), so that the drill tip can be accurately positioned on the material surface and guide the cutting blade into the material. This angle can help the drill bit to be correctly positioned and ensure that the position of the hole will not deviate.
[0028] At the same time, the other side of the center pilot drill tip 8 is tilted outward by 120° to 135° to form a straight cutting edge 2, which helps to ensure that the cutting blade cuts along a predetermined path, thereby maintaining the accuracy of the hole. The straight cutting edge can provide a more stable cutting surface and reduce errors during the cutting process;
[0029] Through the protruding angle of the drill tip and the cutting edge design, the drill can be accurately positioned and guided during the cutting process, thereby keeping the hole position accurate and not deviating.
[0030] In this embodiment, one side of the center spot drill tip 8 is tilted inward by 30° to 60° to form a main cutting edge 9, and the other side of the center spot drill tip 8 is tilted outward by 120° to 135° to form a straight cutting edge 2, and a sharp-angled drill tip shoulder 3 is formed between one end of the straight cutting edge 2 away from the center spot drill tip 8 and the two edges of the cutting edge 6; wherein the sharp angle of the drill tip shoulder 3 is 120°±2°, and the drill tip shoulder 3 and the straight cutting edge 2 are connected to form two flank surfaces 4. More specifically, four main cutting edges 9 and four straight cutting edges 2 are provided, and an inclined chip removal groove is provided on the inner side of the main cutting edge 9.
[0031] The main cutting edge 9 and the shoulder are kept at a sharp angle: the design of the main cutting edge 9 and the shoulder keeping a sharp angle makes it easier for the cutting edge to enter the material during the cutting process, reduces the friction and heat accumulation during cutting, helps to reduce the cutting temperature and edge wear, and extends the service life of the drill bit.
[0032] Among them, the end of the straight cutting edge 2 away from the center spot drill tip 8 forms a sharp angle with the two edges of the cutting edge 6. The sharp cutting edge design can provide a more effective cutting effect, reduce energy loss during processing, and reduce the extrusion and stretching of materials, thereby reducing the wear rate of the cutting edge. This design can maintain the sharpness of the drill bit and extend its service life.
[0033] It should be noted that the above design makes the drill bit wear more evenly, avoiding uneven wear and premature failure caused by excessive local wear. Even wear helps maintain the stability and performance of the drill bit and prolongs its service life.
[0034] At the same time, because the cutting effect of the drill bit is more stable and uniform, and the designed sharp corners and sharp edges can effectively avoid burrs at the drill hole exit, ensuring the quality of the drill hole exit.
[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0037] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of protection claimed by the utility model. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A centering two-edged drill bit, comprising a drill bit body (1), wherein the drill bit body (1) comprises a shank (7) and a blade (6) fixedly connected to one end of the shank (7), characterized in that: The blade (6) is a two-edged structure, and the two ends of the blade (6) away from the handle (7) are rotated to form a protruding center drill tip (8), and the angle of the center drill tip (8) is set at 90° to 120°; One side of the center spot drill tip (8) is inclined inwardly by 30° to 60° to form a main cutting edge (9), and the other side of the center spot drill tip (8) is inclined outwardly by 120° to 135° to form a straight cutting edge (2), and an end of the straight cutting edge (2) away from the center spot drill tip (8) forms a sharp-angled drill tip shoulder (3) between the two edges of the blade portion (6).
2. A centering two-edged drill bit according to claim 1, characterized in that: A blade groove (5) is provided between the two blade-shaped structures of the blade portion (6).
3. A centering two-edged drill bit according to claim 1, characterized in that: Four main cutting edges (9) and four straight cutting edges (2) are provided, and an inclined chip removal groove is provided on the inner side of the main cutting edge (9).
4. A centering two-edged drill bit according to claim 1, characterized in that: The sharp angle of the drill tip shoulder (3) is 120°±2°.
5. A centering two-edged drill bit according to claim 4, characterized in that: The drill tip shoulder (3) and the straight cutting edge (2) are connected to form two flank surfaces (4).
6. A centering two-edged drill bit according to claim 1, characterized in that: The connection between the handle (7) and the blade (6) is a downwardly inclined slope structure.