Twill drill bit structure

Abstract

The utility model relates to the field of drill bit structures, in particular to a twill drill bit structure, which comprises a drill bit main body frame, and is characterized in that the drill bit main body frame comprises a drill bit upper cylindrical surface, a drill bit middle cylindrical surface and a drill bit lower cylindrical surface, lateral chip removal openings are formed in the two sides of the cylindrical surface of the middle portion of the drill bit, connecting threads are arranged on the cylindrical surface of the lower portion of the drill bit, and a dynamic compensation ring is arranged on the neck portion of the cylindrical surface of the upper portion of the drill bit. The inclined grain cutting edge group, the lateral chip removal opening and the spiral chip removal groove are arranged on the main body frame, so that efficient cutting and smooth chip removal are realized, and chip accumulation is avoided; the upper dynamic compensation ring is matched with an oil injection hole, an oil storage groove and an oil penetrating hole to form a self-lubricating system, and frictional wear is reduced; the lower connecting threads ensure stable connection with equipment, and the high-speed operation stability and the machining efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of drill bit structure technology, and in particular to a zigzag drill bit structure. Background Technology

[0002] In modern machining, drill bits, as fundamental and crucial cutting tools, are widely used in drilling various workpieces, including metals, non-metals, and composite materials. With the continuous improvement of machining accuracy, efficiency, and the diversity of workpiece materials, higher demands are placed on the structural design, cutting performance, chip removal capability, and service life of drill bits. Traditional drill bit structures often employ simple straight-edge or ordinary spiral-edge designs. When facing high-hardness materials or high-load conditions, they generally suffer from low cutting efficiency, poor chip removal, easy edge wear, and poor stability. This leads to unstable machining quality and frequent drill bit replacements, affecting production efficiency and increasing production costs.

[0003] Chinese patent discloses a drill bit structure (publication number: CN 207857919 U) comprising a cutting edge section and a shank section. A drill tip is provided at the front end of the cutting edge section, and cutting facets are formed obliquely backward on both sides of the drill tip. At least one chip removal groove is formed on the outer peripheral surface of the cutting edge section. Each cutting facet includes a main cutting face and a secondary cutting face. The width of the drill tip edge on the inner side of at least one main cutting face is smaller than the width on the outer side of the main cutting face. Furthermore, the cutting edge of this main cutting face and part of the back edge of the secondary cutting face of the other cutting face jointly extend to form an auxiliary cutting face. However, this type of drill bit structure often adopts a simple straight cutting edge or ordinary spiral cutting edge design. When facing high-hardness materials or high-load conditions, it generally suffers from problems such as low cutting efficiency, poor chip removal, easy wear of the cutting edge, and poor stability, resulting in unstable machining quality and frequent drill bit replacement. This not only affects production efficiency but also increases production costs. Therefore, a zigzag drill bit structure is needed. Utility Model Content

[0004] The purpose of this utility model is to solve the problems that are common in the existing technology, where traditional drill bit structures mostly adopt simple straight or ordinary spiral blade designs. When facing high-hardness materials or high-load conditions, they generally have problems such as low cutting efficiency, poor chip removal, easy wear of the cutting edge, and poor stability, which leads to unstable processing quality and frequent drill bit replacement. This not only affects production efficiency but also increases production costs. Therefore, a slanted-pattern drill bit structure is proposed.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A helical-grooved drill bit structure, comprising a drill bit main frame, characterized in that: the drill bit main frame is cylindrical and made of tungsten steel matrix; the drill bit main frame includes an upper cylindrical surface, a middle cylindrical surface, and a lower cylindrical surface; the upper cylindrical surface of the drill bit is provided with a helical-grooved cutting edge group; the middle cylindrical surface of the drill bit has lateral chip removal ports on both sides; the lower cylindrical surface of the drill bit has connecting threads; and the neck of the upper cylindrical surface of the drill bit has a dynamic compensation ring. This structure, through modular design, integrates cutting, chip removal, and connection functions into a single frame, giving the drill bit multifunctionality and a compact structure, improving the overall performance and ease of operation during use.

[0006] Preferably, the herringbone cutting edge group includes main cutting edges, with 20-30 main cutting edges arranged in an equally spaced array. The main cutting edges form an angle of 15°-25° with the centerline of the drill bit's main frame, and the surface roughness Ra of the main cutting edge is ≤1.6μm. This cutting edge group design enables the drill bit to achieve uniform force distribution and efficient cutting during the cutting process, improving cutting stability and surface finish, while reducing edge wear and extending the drill bit's service life.

[0007] Preferably, the lateral chip discharge port has a U-shaped structure and a width of 0.5-1mm. The U-shaped chip discharge port design helps chips to be discharged quickly and smoothly from the cutting area, avoiding chip accumulation inside the drill bit, thereby reducing resistance and heat accumulation during the cutting process and improving the continuous working capability of the drill bit.

[0008] Preferably, the dynamic compensation ring is provided with an oil injection hole, an annular oil reservoir on its inner wall, and micro oil perforations on its inner wall. The number of micro oil perforations is 10-12, arranged in an equally spaced array. The oil injection hole, annular oil reservoir, and micro oil perforations are interconnected and cooperate with each other. The dynamic compensation ring, combined with a self-lubricating system design, can provide continuous lubrication during drill bit operation, effectively reducing friction and wear, and enhancing the stability and durability of the drill bit under high-speed or high-load conditions.

[0009] Preferably, the outer wall of the upper cylindrical surface of the drill bit is provided with a spiral chip removal groove, which extends spirally along the upper cylindrical surface of the drill bit and has a surface roughness Ra≤1.6μm. The design of the spiral chip removal groove enhances the ability to guide and remove chips, making it easier for chips to be removed from the cutting area, helping to keep the cutting area clean, and improving the chip removal efficiency and operational reliability of the drill bit.

[0010] Preferably, the lower cylindrical outer wall of the drill bit is provided with a connecting thread surface. The design of the connecting thread allows the drill bit to be quickly and securely connected to the drive equipment, ensuring good concentricity and stability under high-speed rotation and stress conditions, thereby improving the safety and efficiency of the overall operation.

[0011] The advantages of this utility model are:

[0012] This application's zigzag drill bit structure systematically integrates cutting, chip removal, and connection functions. A zigzag cutting edge assembly, a lateral chip removal port, and a spiral chip removal groove are set on the drill bit's main frame, achieving both efficient cutting and smooth chip removal. This effectively prevents chip accumulation in the cutting area, thereby reducing cutting resistance and heat buildup. Simultaneously, the dynamic compensation ring at the top of the drill bit, combined with internal oil injection holes, annular oil reservoirs, and micro-oil perforations, constitutes a self-lubricating system that continuously provides lubrication during operation, significantly reducing friction and wear, and enhancing the drill bit's stability and durability under high-speed or high-load conditions. Furthermore, the connecting threads at the bottom of the drill bit ensure a secure connection with the drive equipment, maintaining good concentricity and stability during high-speed rotation, thereby improving overall operational safety and processing efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the dynamic compensation ring structure of this utility model.

[0016] Figure 3 This utility model Figure 2 Enlarged view of I in the middle.

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the dynamic compensation ring of this utility model.

[0018] In the diagram: 1. Drill bit body frame; 2. Upper cylindrical surface of the drill bit; 3. Middle cylindrical surface of the drill bit; 4. Lower cylindrical surface of the drill bit; 5. Main cutting edge; 6. Dynamic compensation ring; 7. Spiral chip removal groove; 8. Lateral chip removal port; 9. Connecting threaded surface; 10. Oil injection hole; 11. Miniature oil passage hole; 12. Annular oil reservoir. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Example

[0020] Please see Figures 1-4 As shown, a helical-grooved drill bit structure includes a drill bit body frame 1. The drill bit body frame 1 is cylindrical and made of tungsten steel. It includes an upper cylindrical surface 2, a middle cylindrical surface 3, and a lower cylindrical surface 4. The upper cylindrical surface 2 is provided with helical-grooved cutting edges. Lateral chip removal ports 8 are provided on both sides of the middle cylindrical surface 3. Connecting threads are provided on the lower cylindrical surface 4. A dynamic compensation ring 6 is provided at the neck of the upper cylindrical surface 2. This structure, through modular design, integrates cutting, chip removal, and connection functions into a single frame, giving the drill bit multifunctionality and a compact structure, thus improving its overall performance and ease of operation during use.

[0021] In this embodiment, the herringbone cutting edge group includes main cutting edges 5, of which there are 20 to 30 arranged in an equally spaced array. The main cutting edges 5 form an angle of 15°-25° with the centerline of the drill bit's main frame 1, and the surface roughness Ra of the cutting edge 5 is ≤1.6μm. This cutting edge group design enables the drill bit to achieve uniform force distribution and efficient cutting during the cutting process, improving cutting stability and surface finish, while reducing edge wear and extending the drill bit's service life.

[0022] In this embodiment, the lateral chip removal port 8 has a U-shaped structure and a width of 0.5-1mm. The U-shaped chip removal port design helps chips to be discharged quickly and smoothly from the cutting area, avoiding chip accumulation inside the drill bit, thereby reducing resistance and heat accumulation during the cutting process and improving the continuous working capability of the drill bit.

[0023] In this embodiment, the dynamic compensation ring 6 is provided with an oil injection hole 10, an annular oil reservoir 12 is provided on the inner wall of the dynamic compensation ring 6, and micro oil permeable holes 11 are provided on the inner wall of the dynamic compensation ring 6. The number of micro oil permeable holes 11 is 10 to 12, and they are arranged in an equally spaced array. The oil injection hole 10, the annular oil reservoir 12, and the micro oil permeable holes 11 are interconnected and cooperate with each other. The dynamic compensation ring 6 is designed with a self-lubricating system, which can provide continuous lubrication during the operation of the drill bit, effectively reducing friction and wear, and enhancing the stability and durability of the drill bit under high-speed or high-load conditions.

[0024] In this embodiment, the outer wall of the upper cylindrical surface 2 of the drill bit is provided with a spiral chip removal groove 7. The spiral chip removal groove 7 extends spirally along the upper cylindrical surface 2 of the drill bit and has a surface roughness Ra≤1.6μm. The design of the spiral chip removal groove 7 enhances the ability to guide and remove chips, making it easier for chips to be removed from the cutting area, which helps to keep the cutting area clean and improves the chip removal efficiency and working reliability of the drill bit.

[0025] In this embodiment, the outer wall of the lower cylindrical surface 4 of the drill bit is provided with a connecting thread surface 9. The design of the connecting thread enables the drill bit to be quickly and securely connected to the drive equipment, ensuring good concentricity and stability under high-speed rotation and stress conditions, thereby improving the safety and efficiency of the overall operation.

[0026] The implementation principle of this embodiment is as follows:

[0027] When the zigzag drill bit is in operation, it is first securely connected to the drilling machine or other driving equipment via the connecting thread at the bottom, ensuring that the drill bit maintains stable concentricity and positioning accuracy during high-speed rotation. When the drill bit begins to contact the workpiece surface, the zigzag cutting edge group located on the upper cylindrical surface 2 of the drill bit begins to function. These main cutting edges 5 contact the workpiece at a certain angle and cut the workpiece through rotational motion. Because the cutting edges are distributed in an equally spaced array, uniform force can be achieved, improving the stability and efficiency of the cutting process.

[0028] During the cutting process, the generated chips are quickly discharged through the U-shaped lateral chip removal ports 8 on both sides of the cylindrical surface 3 in the middle of the drill bit, preventing chips from accumulating in the cutting area and causing blockage or secondary cutting. On the other hand, the spiral chip removal groove 7 set on the upper outer wall of the drill bit also guides the chips to be discharged outward, further enhancing the chip removal effect, keeping the cutting area clean, and reducing heat accumulation and frictional resistance.

[0029] Meanwhile, the dynamic compensation ring 6 on the neck of the upper cylindrical surface 2 of the drill bit plays a dynamic balancing and compensation role during the high-speed rotation and stress of the drill bit. The oil injection hole 10, the annular oil reservoir 12 and the multiple micro oil penetration holes 11 inside it work together to allow the lubricating oil to continuously penetrate into the friction area where the drill bit and the workpiece are in contact, forming a stable lubricating film, effectively reducing the coefficient of friction and the degree of wear, and improving the durability and working stability of the drill bit.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A zigzag drill bit structure, comprising a drill bit body frame (1), characterized in that... The drill bit main frame (1) is cylindrical in shape and made of tungsten steel matrix. The drill bit main frame (1) includes an upper cylindrical surface (2), a middle cylindrical surface (3) and a lower cylindrical surface (4). The upper cylindrical surface (2) of the drill bit is provided with a set of oblique cutting edges. The middle cylindrical surface (3) of the drill bit is provided with lateral chip removal ports (8) on both sides. The lower cylindrical surface (4) of the drill bit is provided with connecting threads. The upper cylindrical surface (2) of the drill bit is provided with a dynamic compensation ring (6) at the neck.

2. The oblique-patterned drill bit structure according to claim 1, characterized in that: The oblique cutting edge group includes a main cutting edge (5), the number of the main cutting edges (5) is 20 to 30 and they are arranged in an equally spaced array. The main cutting edge (5) forms an angle of 15°-25° with the center line of the drill bit body frame (1). The surface roughness Ra of the cutting edge of the main cutting edge (5) is ≤1.6μm.

3. The oblique-patterned drill bit structure according to claim 1, characterized in that: The side chip discharge port (8) has a U-shaped structure and a width of 0.5-1mm.

4. The oblique-patterned drill bit structure according to claim 1, characterized in that: The dynamic compensation ring (6) is provided with an oil injection hole (10), the inner wall of the dynamic compensation ring (6) is provided with an annular oil storage groove (12), the inner wall of the dynamic compensation ring (6) is provided with a micro oil permeation hole (11), the number of micro oil permeation holes (11) is 10 to 12 and they are arranged in an equally spaced array, and the oil injection hole (10), the annular oil storage groove (12) and the micro oil permeation hole (11) are interconnected and cooperate with each other.

5. The oblique-patterned drill bit structure according to claim 1, characterized in that: The upper cylindrical surface (2) of the drill bit is provided with a spiral chip removal groove (7) on its outer wall. The spiral chip removal groove (7) extends spirally along the upper cylindrical surface (2) of the drill bit and has a surface roughness Ra≤1.6μm.

6. The oblique-patterned drill bit structure according to claim 1, characterized in that: The lower cylindrical surface (4) of the drill bit has a connecting threaded surface (9) on its outer wall.

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