A nail cutting branch drill

Abstract

The utility model discloses a kind of nail cutting support drill, including handle body and the spiral body for chip removal being set on the handle body, drill tip body is provided on the spiral body, recess for reducing cutting surface heating is provided on the drill tip body in the part close to the spiral body. The utility model makes that drill tip body reduces heating surface under the condition of high-speed operation, reduces the damage condition caused by high temperature and contact surface, greatly improves the service life, and then reduces the overall scrap rate, finally reduces the cost input, more conducive to meeting use demand.

Description

Technical Field

[0001] This utility model relates to the field of wood processing tools, and in particular to a nail cutting screw drill. Background Technology

[0002] A typical woodworking drill has a main cutting edge and side cutting edges. The main cutting edge primarily cuts the wood in the center of the hole, while the side cutting edges cut the hole walls, resulting in smooth, uniformly sized holes. Because the materials drilled by woodworking drills are usually porous and not very hard, their cutting edges are quite sharp, with large rake and clearance angles and a small angle between the rake and clearance faces. Woodworking drills are typically made of 45# steel, with a hardness of 45-48 HRC after quenching. However, during drilling, especially when processing old wood, nails are often present. When a typical woodworking drill encounters a nail, the relatively weak cutting edge can chip or bend, damaging the drill's edge and rendering it unusable, or reducing drilling quality and efficiency. Therefore, there are nail-cutting screw drills (also known as nail-cutting straight screw drills) on the market for cutting wood that may contain nails. These drill bits have high strength, but because they lack side cutting edges, the holes they drill have rough walls. The frictional resistance between the drill head and body and the hole wall is high, resulting in high power consumption, high heat generation, and even scorching of the hole wall, affecting the drilling quality. As a result, a bimetallic nail-cutting screw drill with authorization announcement number CN204869142U was developed. This drill includes a drill body with a main cutting edge at the front end and a spiral chip removal groove. A shank for clamping is located at the tail end of the drill body, and a tapered screw tip is located at the front end of the center of the drill body. Since the tapered screw tip rotates at high speed during drilling, it generates high temperatures, which significantly reduces the service life of the tapered screw tip and increases costs. To improve this situation, it is necessary to make improvements. Utility Model Content

[0003] (a) Technical problems that need to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a cutting screw drill, which reduces the heating surface of the drill tip during high-speed operation, thereby reducing damage caused by high temperatures and contact surfaces, greatly extending service life, reducing the overall scrap rate, and ultimately lowering costs, making it more suitable for meeting usage requirements.

[0005] (ii) Technical solutions to be adopted

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A chip-cutting screw drill includes a shank and a auger disposed on the shank for chip removal. The auger is provided with a drill tip, and a groove is provided on the drill tip near the auger to reduce heat generation on the cutting surface.

[0008] Preferably, the groove is a depression that wraps around the outer surface of the drill tip one or more times.

[0009] Preferably, the grooves are pits that are symmetrically distributed.

[0010] Preferably, the depth of the groove is one-tenth of the thickness of the drill tip near the position of the helical body.

[0011] Preferably, the drill tip is a cone with external threads.

[0012] Preferably, the cone with external threads has a notch located near the externally threaded cone.

[0013] Preferably, the drill tip is a pyramid with symmetrically distributed pits on it.

[0014] Preferably, the pyramid is a square pyramid.

[0015] Preferably, the helical body has grooves on its end face.

[0016] Preferably, the handle is an SDS handle or a hexagonal handle, and the handle and the helical body are integrally formed, and the helical body and the drill tip are integrally formed.

[0017] (III) The technical effects to be achieved

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] Firstly, this invention provides a groove on the drill tip near the spiral part to reduce the heat generated on the cutting surface. This reduces the heat generated on the drill tip when it is running at high speed, thereby reducing damage caused by high temperature and contact surface, greatly improving service life, reducing the overall scrap rate, and ultimately reducing cost investment, which is more conducive to meeting the needs of use.

[0020] Secondly, the groove described in this utility model is a recess or pit that is symmetrically distributed around the outer surface of the drill tip in one or more circles. It has various forms and can be set and changed according to the shape of the drill tip, which provides a wide range of choices and is more conducive to meeting the needs of production and processing. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the drill tip structure with a pyramid shape according to this utility model.

[0022] Figure 2 This is a schematic diagram of an embodiment of the drill tip with a pyramid shape according to the present invention.

[0023] Figure 3 This is a schematic diagram of embodiment two of the present invention, which features a drill tip with a pyramidal shape.

[0024] Figure 4 This is a schematic diagram of embodiment three of the present invention, which features a drill tip with a pyramidal shape.

[0025] Figure 5 This is a schematic diagram of embodiment four of the present invention, which features a drill tip with a pyramidal shape.

[0026] Figure 6 This is a schematic diagram of embodiment five of the present invention, which features a drill tip with a pyramidal shape.

[0027] Figure 7 This is a schematic diagram of an embodiment of the conical body with external threads according to the present invention.

[0028] Figure 8 This is a schematic diagram of a second embodiment of the conical body with external threads according to the present invention.

[0029] Figure 9 This is a schematic diagram of Embodiment 3 of the tapered body with external threads of this utility model.

[0030] Figure 10 This is a schematic diagram of embodiment four of the conical body with external threads of this utility model.

[0031] Figure 11 This is a schematic diagram of embodiment five of the conical body with external threads of this utility model.

[0032] Figure 12 This is a schematic diagram of embodiment six of the conical body with external threads of this utility model.

[0033] In the diagram: 1, handle; 2, spiral; 3, drill tip; 4, groove; 21, slot; 41, notch. Detailed Implementation

[0034] In the description of this utility model, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0035] In the description of this utility model, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0038] Example 1: See Figures 1 to 12 A chip-cutting screw drill includes a shank 1 and a auger 2 disposed on the shank 1 for chip removal. The auger 2 is provided with a drill tip 3. A groove 4 is provided on the drill tip 3 near the auger 2 to reduce heat generation on the cutting surface. The groove 4 reduces the heat generation point on the cutting surface of the drill tip 3 during operation, reducing damage caused by high temperature and contact surface, greatly improving service life, reducing overall scrap rate, and ultimately reducing cost, which is more conducive to meeting usage requirements.

[0039] Example 2: This can be explained based on Example 1, such as... Figures 1 to 12As shown, the groove 4 is a recess that wraps around the outer surface of the drill tip 3 in one or more circles (in this embodiment, it is a single circle, depending on the length of the drill tip 3) or symmetrically distributed pits (generally arranged in a strip shape). This reasonable arrangement can reduce the heat point of the cutting surface during the operation of the drill tip 3, reduce damage caused by high temperature and contact surface, and greatly improve its service life. Further, the depth of the groove 4 is one-tenth of the thickness of the drill tip 3 near the position of the helical body 2. This maintains the firmness and strength of the drill tip 3 while reducing the heat point of the cutting surface during operation, reducing damage caused by high temperature and contact surface, thus better meeting the usage requirements. Further, a notch 41 is opened on the tapered body with external threads, close to the external threads of the tapered body, which helps to enhance the sharpness of drilling.

[0040] Among them, such as Figures 7 to 12 As shown, the drill tip 3 is a cone with external threads. The groove 4 is a recess that wraps around the outer surface of the drill tip 3 one or more times (in this embodiment, it is a recess with one ring, which is determined by the length of the drill tip 3). The external thread cone helps to increase the drilling speed and has a better self-tapping effect.

[0041] Among them, such as Figures 1 to 6 As shown, the drill tip 3 is a pyramid, but in this embodiment, it is a square pyramid with symmetrically distributed recesses (generally arranged in a strip shape). Because the pyramid has a pointed center, it can smoothly enter the hole when encountering a nail, facilitating drilling. Further, the helical body 2 has a groove 21 on its end face. The pyramid has no openings other than the recesses, which is beneficial for smooth entry when encountering a nail during drilling, resulting in higher smoothness of chip removal.

[0042] Example 3: This can be described based on Example 1 or Example 2, such as... Figures 1 to 12 As shown, the handle 1 is made of SDS or a hexagonal handle. This design allows for compatibility with various machine models and offers a wide range of choices. Furthermore, the handle 1 and the auger 2 are integrally formed, as are the auger 2 and the drill tip 3, significantly enhancing the overall structural strength. To further clarify, the handle 1, auger 2, and drill tip 3 are made of 40CR steel, and after quenching, their hardness reaches 45-48 HRC, better meeting usage requirements.

[0043] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. A nail cutting awl comprising a handle (1) and a spiral (2) provided on the handle (1) for chip removal, a drilling tip (3) being provided on the spiral (2), characterized in that: A groove (4) is provided on the drill tip (3) near the spiral (2) to reduce the heat generation of the cutting surface.

2. The nail cutting spur as claimed in claim 1, wherein: The groove (4) is a depression that wraps around the outer surface of the drill tip (3) one or more times.

3. The nail clipper awl drill of claim 1 wherein: The groove (4) is a pit that is symmetrically distributed.

4. A nail clipper according to claim 2 or 3, wherein: The depth of the groove (4) is one-tenth the thickness of the drill tip (3) at a position close to the spiral (2).

5. The nail clipper awl drill of claim 2 wherein: The drill tip (3) is a cone with external threads.

6. The nail clipper awl drill of claim 5, wherein: The cone with external threads has a notch (41) located near the externally threaded cone.

7. The nail clipper awl drill of claim 3 wherein: The drill tip (3) is a pyramid with symmetrically distributed pits on it.

8. The nail clipper awl drill of claim 7, wherein: The pyramid is a square pyramid.

9. The nail clipper according to claim 3 or 7 or 8, wherein: The end face of the spiral (2) is provided with a groove (21).

10. The nail clipper according to claim 1 or 2 or 3 or 7 or 8, wherein: The handle (1) is an SDS handle or a hexagonal handle, and the handle (1) and the spiral body (2) are integrally formed, and the spiral body (2) and the drill tip (3) are integrally formed.

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