Improved drill bit

Abstract

The utility model provides a drill bit improved structure, it mainly includes a drill bit, the drill bit is equipped with a handle and the blade part of the handle extension, forms the drill tip with arc structure at the top of the blade part, and is equipped with the cutting edge on the edge of the blade part, the spiral extension of the outer edge of cutting edge is equipped with at least one chip removal groove, and is equipped with a main cutting edge on the opposite side of the chip removal groove, is equipped with at least two cutting curved sections with different radian between the chip removal groove and main cutting edge, including a first cutting curved section and a second cutting curved section, and can selectively be equipped with a third cutting curved section on one side of the chip removal groove, is by the setting of preceding mentioned cutting curved section, can make the chip in cutting, the first guide and shunt in the process of swarf, then smoothly slip into the chip removal groove, expel outside the cutting tool to avoid the chip, the swarf stagnation causes resistance and high temperature, and then effectively improve the chip removal efficiency, processing quality and drill bit service life.

Description

Technical Field

[0001] This utility model relates to an improved drill bit structure, and more particularly to a structural design that improves chip guidance and chip removal efficiency by setting different curvature segments between the cutting edge and the chip removal groove of the drill bit, and further enhances the stability of cutting and the service life of the drill bit. Background Technology

[0002] As shown in current technology, the structure of a traditional drill bit consists of a cutting edge extending from the shank, with an arc-shaped drill tip at the top of the cutting edge. The cutting edge also has a cutting edge and a helical chip-removing groove circumferentially around it. This chip-removing groove is primarily used to guide the chips generated by the workpiece material during cutting out of the tool, preventing chips from remaining on the cutting edge and affecting machining efficiency.

[0003] However, in actual drilling processes, traditional drill bits often have a single arc or linear structure on the inner wall of the chip removal groove, which means that the chips do not have a proper guiding transition at the beginning of their formation. As a result, the chips often accumulate near the cutting edge, leading to poor chip removal. This is especially true when machining materials with high toughness or those that easily produce long, thin chips (such as aluminum alloys and stainless steel), where problems such as chip entanglement and blockage of the chip removal groove are more likely to occur.

[0004] In addition, the above-mentioned problems will increase the machining resistance, which will increase the load on the cutting tool. This will not only lead to the accumulation of frictional heat and affect the surface finish of the hole wall, but may also cause premature wear or chipping of the drill bit. In severe cases, it may be necessary to frequently retract the tool to remove chips, affecting machining efficiency and stability.

[0005] Therefore, existing technologies still need to be improved to provide a structural design that can guide chips in the early stages of cutting and further accelerate their removal after they enter the cutting groove, so as to effectively solve the problem of poor chip removal and improve machining quality and tool life. This is the key area that those engaged in this industry urgently need to study and improve. Utility Model Content

[0006] Therefore, in view of the above-mentioned problems and deficiencies, the main purpose of this utility model is to provide an improved drill bit structure.

[0007] This utility model provides an improved drill bit structure, which has a drill bit, characterized in that: a cutting edge extends from one side of the shank of the drill bit, the top of the cutting edge forms a drill tip with an arc-shaped structure, the end edge of the cutting edge forms a cutting edge, at least one row of chip grooves for chip removal are spirally extended downward at the outer edge of the cutting edge, a main cutting edge is provided on the side opposite to the at least one row of chip grooves on the outer edge of the cutting edge, and a first cutting curve segment and a second cutting curve segment with different curvature surfaces are provided between the at least one row of chip grooves and the at least one main cutting edge.

[0008] Wherein: the curvature of the first cutting segment of the drill bit is less than the curvature of the second cutting segment.

[0009] Wherein: at least one third cutting curve is provided on one side of at least one row of chip grooves of the drill bit.

[0010] The present invention provides a first cutting section and a second cutting section with different curvature surfaces between the at least one row of chip grooves and the at least one main cutting edge to improve chip guidance, acceleration and flow diversion. This improves chip guidance and chip removal efficiency, and further enhances the stability of cutting and the service life of the drill bit. Attached Figure Description

[0011] Figure 1 This is a three-dimensional view of the improved drill bit structure of this utility model.

[0012] Figure 2 This is a cross-sectional view (I) of the first part of the improved drill bit structure of this utility model.

[0013] Figure 3 This is a cross-sectional view (II) of the first part of the improved drill bit structure of this utility model.

[0014] Explanation of reference numerals in the attached drawings: 1-Drill bit; 11-Shant; 12-Cutting edge; 121-Drill tip; 122-Cutting edge; 123-Chip removal groove; 124-Main cutting edge; R1-First cutting curve; R2-Second cutting curve; R3-Third cutting curve. Detailed Implementation

[0015] Please see Figure 1 , Figure 2 , 3 The figures show a three-dimensional view of the improved drill bit structure of this utility model, a cross-sectional view (I) of the first figure, and a cross-sectional view (II) of the first figure, respectively. The improved drill bit structure of this utility model mainly includes a drill bit 1, and the connection relationship of the aforementioned components is as follows:

[0016] The drill bit 1 has a shank 11 on one side with a cutting edge 12. The tip of the cutting edge 12 has an arc-shaped drill tip 121, and a cutting edge 122 is formed at the end edge of the cutting edge 12. At least one row of chip grooves 123 for chip removal extends downwards spirally from the outer edge of the cutting edge 122. A main cutting edge 124 is provided on the opposite side of the at least one row of chip grooves 123. Between the at least one row of chip grooves 123 and the at least one main cutting edge 124, there are a first cutting curve segment R1 and a second cutting curve segment R2 with different curvature surfaces (e.g., ...). Figure 2 As shown), at least one third cutting curve R3 is provided on one side of the at least one chip-removing groove 123 that extends spirally for chip removal purposes (as shown). Figure 3(As shown).

[0017] Furthermore, the arc-shaped tail end of the aforementioned drill tip 121 can connect more smoothly and seamlessly with the at least one row of chip grooves 123, and is easier to precision grind and finish.

[0018] Therefore, as described above, this utility model utilizes the first cutting curve segment R1 and the second cutting curve segment R2 provided between the chip removal groove 123 and the main cutting edge 124. The first cutting curve segment R1 has a curved surface with a small curvature. When the preset workpiece material (not shown in the figure) is cut by the cutting edge 122, it is first guided by the first cutting curve segment R1 into the chip removal groove 123, which can effectively prevent the chips from accumulating near the cutting edge and reduce the resistance in the early stage of cutting. At the same time, the chip thickness is initially dispersed and guided. The second cutting curve segment R2 has a curved surface with a large curvature, which connects with the first cutting curve segment R1 to form a continuous guiding surface. This allows the chips and shavings introduced by the first cutting curve segment R1 to slide smoothly on the second cutting curve segment R2 and be discharged into the chip removal groove 123 at an accelerated speed, so as to avoid the chips and shavings from being stuck in the cutting edge area and causing blockage, and to reduce the temperature rise caused by friction.

[0019] Therefore, through the synergistic effect of the first cutting curve R1 and the second cutting curve R2, the flow path of chips and shavings can be made smoother, the chip removal efficiency can be significantly improved, and the cutting resistance and cutting heat generation can be further reduced. This not only helps to extend the service life of the drill bit, but also improves the stability of drilling and the smoothness of the hole wall surface.

[0020] Furthermore, the arrangement of the aforementioned first cutting curve segment R1 and second cutting curve segment R2 is not limited to a combination of a small-radius first cutting curve segment R1 connected to a large-radius second cutting curve segment R2. In other embodiments, the first cutting curve segment R1 can also be set to a larger radius, while the second cutting curve segment R2 can be set to a smaller radius, still forming the same guiding effect to facilitate the entry of chips into the chip removal groove 123. The main technical feature disclosed in this utility model is "at least two cutting curve segments with different radii are provided between the chip removal groove 123 and the main cutting edge 124". It is not limited to a fixed radii size or sequence. It can achieve the effect of chip guidance and accelerated chip removal by using curved surfaces with different radii, and all of these should be covered within the protection scope of this utility model.

[0021] Furthermore, this invention provides at least one third cutting curve segment R3 on one side of the at least one chip removal groove 123, which is further formed on the inner wall of the chip removal groove 123. Through the curved surface of different angles or curvatures, after the chips and burrs are guided into the chip removal groove 123 by the first cutting curve segment R1 and the second cutting curve segment R2, the chips are further accelerated to slide or divert, so that the chips are more smoothly discharged from the cutting edge area. In this way, the at least one third cutting curve segment R3 can produce a synergistic effect with the first cutting curve segment R1 and the second cutting curve segment R2, making the chip removal process more efficient and reducing the possibility of chip retention, thereby reducing the cutting resistance and frictional heat generation, improving the overall machining quality and the service life of the drill bit.

[0022] Therefore, the setting of the at least one third cutting curve segment R3 is not limited to a fixed arc size or angle direction. It can also be set as a downward tilt, lateral offset or multi-segment curved surface structure as needed. As long as it can achieve the effect of guiding, accelerating or diverting chips, it should be covered within the protection scope of this utility model.

[0023] In other words, at least two cutting curves (such as R1 and R2) with different curvatures are provided between the chip removal groove 123 and the main cutting edge 124, and can be combined with the at least one third cutting curve R3 provided on one side of the chip removal groove 123 to jointly improve the chip flow path and chip removal efficiency. Therefore, no matter how the number, curvature configuration or direction of the cutting curves are changed, as long as the aforementioned effect of improving chip removal can be achieved, it falls within the scope of this utility model.

[0024] In practical application, when the drill bit 1 cuts the preset workpiece material, the preset workpiece material will form continuous chips at the cutting edge 122 of the cutting edge 12. The first cutting curve R1 and the second cutting curve R2 between the chip removal groove 123 of the cutting edge 12 and the main cutting edge 124 guide and divert the chips and shavings generated by the cutting edge 122 in the initial cutting stage, and smoothly discharge them into the chip removal groove 123 during the subsequent cutting, avoiding the accumulation of chips and shavings near the cutting edge. In addition, the at least one third cutting curve R3 provided on one side of the chip removal groove 123 can further divert and accelerate the sliding of the chips entering the groove, so that the chips are discharged from the tool more quickly.

[0025] Therefore, this utility model addresses the problem of chip and shavings accumulation and poor chip removal in traditional drill bits during the cutting process. The proposed improved structure is characterized by at least two cutting curves (such as R1 and R2) with different curvatures between the chip removal groove and the main cutting edge. These curves work together to improve chip guidance, acceleration, and diversion, thereby effectively improving chip removal efficiency and machining stability. The secondary feature is that at least one third cutting curve R3 can be provided on one side of the chip removal groove to further divert and accelerate the sliding of chips and shavings entering the chip removal groove.

[0026] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Therefore, any simple modifications and equivalent structural changes made based on the description and drawings of the present utility model should also be included in the patent scope of the present utility model.

Claims

1. An improved drill bit structure, comprising a drill bit, characterized in that: The drill bit has a cutting edge extending from one side of the shank. The top of the cutting edge forms a drill tip with an arc-shaped structure. The edge of the cutting edge forms a cutting edge. At least one row of chip grooves for chip removal extends downward spirally from the outer edge of the cutting edge. A main cutting edge is provided on the side opposite to the at least one row of chip grooves on the outer edge of the cutting edge. A first cutting curve segment and a second cutting curve segment with different curvature surfaces are provided between the at least one row of chip grooves and the at least one main cutting edge.

2. The improved drill bit structure as described in claim 1, characterized in that: The curvature of the first cutting segment of the drill bit is smaller than that of the second cutting segment.

3. The improved drill bit structure as described in claim 1, characterized in that: The drill bit has at least one third cutting curve on one side of at least one row of chip grooves.

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