Front groove multi-cutting-edge centripetal inlaid-cutting-edge drill bit blade

Abstract

The utility model discloses a front groove multi-edge centripetal inlaid bit blade which comprises a bit blade body, a square positioning groove is formed in the middle of the rear end of the bit blade body, two sets of positioning holes are formed in the front face of the bit blade body, and two sets of rear cutting faces and front cutting faces which are arranged in a staggered mode are arranged at the upper end of the bit blade body. A front cutting face is arranged on the center line of the drilling circle, a chip breaker groove is formed in the front cutting face, an arc-shaped front cutter face is arranged in the chip breaker groove, a blade is arranged at the front end of the chip breaker groove, and chip dividing grooves are evenly formed in the front cutter face and located on the center line of the drilling circle. Fish scale-shaped multi-cutting-edge centripetal chip dividing grooves are ground in the front cutter face, chip breaking grooves are formed at the same time, the left cutting force and the right cutting force are equal, and multi-stage chip dividing of the front cutter face is achieved; the extension lines of all the chip dividing groove blades intersect at the center of the drill bit blade, all the chip dividing groove blades are located on the center line of a drilling circle, cutting resistance is reduced, and cutting power consumption is reduced. And during drilling, multi-stage step hole wall guiding is formed, and the drilling precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of front groove multi-edge centripetal insert drill bit blades, in particular to a front groove multi-edge centripetal insert drill bit blade. Background Art

[0002] In the existing drill bit blade technology, especially in the design of front groove multi-edge centripetal insert drill bit blade, the following problems usually exist: the drill bit blade has a chip splitting groove on the back cutting surface, but the cutting forces of the left and right cutting edges are often different, resulting in unbalanced cutting and additional cutting resistance. In addition, in the traditional drill bit blade design, the cutting edge is usually higher than the center of the cutting circle, which further increases the resistance during cutting, reduces cutting efficiency, and may cause the drill bit blade to wear too quickly.

[0003] In order to solve these problems, the utility model proposes a front groove multi-edge centripetal insert drill blade design, aiming to achieve a balance of cutting force, reduce cutting resistance, improve cutting efficiency and drilling accuracy. Utility Model Content

[0004] The technical problem solved by the utility model is to overcome the defects mentioned in the background technology and provide a front groove multi-edge centripetal insert drill bit blade.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a front-groove multi-edge centripetal insert drill blade, comprising a drill blade body, a square positioning groove is provided in the middle of the rear end of the drill blade body, and two groups of positioning holes are provided on the front of the drill blade body, two groups of staggered rear cutting surfaces and front cutting surfaces are provided at the upper end of the drill blade body, and a chip breaker groove is provided on the front cutting surface, an arc-shaped front cutting surface is provided inside the chip breaker groove, a cutting edge is provided at the front end of the chip breaker groove, and chip dividing grooves are evenly provided on the front cutting surface on the center line of the drilling circle.

[0006] Furthermore, the number of chip breaker grooves provided on the front cutting surface on one side of the drill blade body is 1-4 groups, and the width L of each group of chip breaker grooves ranges from 1.5 to 6 mm, and the extension lines of the cutting edges all intersect at the center of the drill blade.

[0007] Furthermore, the chip breaker grooves are in the shape of fish scales, and when there are 2 to 4 groups of chip breaker grooves, they are arranged in a stepped manner.

[0008] Furthermore, the angle between the front cutting edge provided on the chip breaker groove and the vertical direction is 12°.

[0009] Furthermore, the drill point angle of the drill blade body is 130°, and the angle between the rear cutting surface on the back side and the lateral direction is 23°.

[0010] Furthermore, the positioning holes are holes of a truncated cone structure, and the truncated cones of the two groups of positioning holes are in opposite directions.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The front cutting edge is ground into fish scale-like multi-edge centripetal chip grooves, and a chip breaker groove is formed at the same time. The cutting force is equal on both sides, realizing multi-level chip division on the front cutting edge.

[0013] The extension lines of each chip groove edge intersect at the center of the drill blade, and all the chip groove edges are on the center line of the drilling circle, which reduces the cutting resistance and the cutting power consumption;

[0014] During drilling, a multi-step hole wall guide is formed to improve the drilling accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a front view of the structure of the utility model;

[0017] Figure 3 This is a three-dimensional schematic diagram of the chip dividing groove of the utility model structure;

[0018] Figure 4 It is a top view of the structure of the utility model.

[0019] Numbers in the figure: 1, drill blade body; 2, positioning groove; 3, positioning hole; 4, rear cutting surface; 5, chip breaker groove; 51, front cutting surface; 52, chip dividing groove; 53, cutting edge. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-4 The utility model provides a technical solution: a front groove multi-edge centripetal insert drill blade, the drill blade body 1 is made of high-hardness, wear-resistant alloy steel to ensure its stability and durability during high-speed rotation and cutting; a square positioning groove 2 is opened in the middle of the rear end of the drill blade body 1 for precise docking and fixation with the drill body.

[0022] On the front side of the drill blade body 1, two groups of symmetrical truncated cone structure positioning holes 3 are designed, each group includes two positioning holes 3, and the truncated cones of each positioning hole 3 are in opposite directions to ensure that the blade will not loosen during high-speed rotation;

[0023] The upper end of the drill blade body 1 is designed to have two sets of rear cutting faces 4 and front cutting faces arranged alternately. The rear cutting faces 4 are mainly responsible for stabilizing cutting and reducing vibration.

[0024] The front cutting surface is the main cutting working area, and is provided with 1 to 4 groups of chip breakers. The width L of each group of chip breakers 5 can be selected in the range of 1.5 to 6 mm according to the cutting material and requirements. The chip breakers 5 are in the shape of fish scales, and when there are 2 to 4 groups of chip breakers, they are arranged in a stepped manner. The interior of the chip breaker 5 is designed as an arc-shaped front cutting face 51 to optimize the cutting effect and chip breaking performance; the angle between the front cutting face 51 and the vertical is precisely controlled to be 12°, which is the best angle verified by multiple experiments.

[0025] A plurality of chip grooves 52 are evenly arranged on the front cutting edge. These chip grooves 52 are located on the center line of the drilling circle to ensure balanced cutting force and reduce cutting resistance. The number and distribution of the chip grooves 52 are reasonably designed according to cutting requirements and blade size.

[0026] A cutting edge 53 is provided at the front end of the chip groove 52, and the extension lines of these cutting edges all intersect at the center of the drill blade to further reduce cutting resistance and improve cutting efficiency. The material and hardness of the cutting edge are specially selected and processed to ensure that it remains sharp during a long cutting process.

[0027] The drill tip angle of the drill blade body 1 is designed to be 130°, which helps to improve cutting efficiency and drilling accuracy.

[0028] The angle between the rear cutting surface 4 on the back and the horizontal direction is designed to be 23°, which helps to reduce vibration and resistance during cutting and improve the stability of the cutting process.

[0029] A high-precision CNC machine tool is used to process the drill bit blade body 1. The machine tool is programmed to perform precise milling, drilling, grinding and other processes to ensure the dimensional accuracy and angular accuracy of each component.

[0030] During the heat treatment stage, the drill bit blade body 1 is quenched and tempered to improve its hardness and wear resistance. Parameters such as quenching temperature, holding time and cooling rate are carefully controlled to ensure that the drill bit blade body 1 obtains ideal mechanical properties.

[0031] Precision grinding is performed on the front cutting surface to form the chip breaker 5, the front cutting surface and the cutting edge. Special grinding wheels and coolants are used during the grinding process to ensure machining accuracy and surface quality.

[0032] Connect the drill blade body 1 to the drill body through the positioning groove 2, and use a special clamp to fix the blade on the machine tool to ensure that the positioning groove 2 is accurately aligned with the positioning hole 3 of the drill body; use tools such as a torque wrench to tighten the connection part to ensure that the connection between the blade and the drill body is firm and reliable; perform final adjustments and calibrations after the installation is completed, including checking whether the installation angle and position parameters of the blade meet the requirements.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A front groove multi-edge centripetal insert drill blade, comprising a drill blade body (1), a square positioning groove (2) is provided in the middle of the rear end of the drill blade body (1), and two groups of positioning holes (3) are provided on the front of the drill blade body (1), the upper end of the drill blade body (1) is provided with two groups of rear cutting surfaces (4) and front cutting surfaces arranged in a staggered manner, and a chip breaker groove (5) is provided on the front cutting surface, an arc-shaped front cutting surface (51) is provided inside the chip breaker groove (5), and a cutting edge (53) is provided at the front end of the chip breaker groove (5), and a chip dividing groove (52) is evenly provided on the front cutting surface (51) on the center line of the drilling circle.

2. The front groove multi-edge centripetal insert drill bit blade according to claim 1, characterized in that: The number of chip breaker grooves (5) provided on the front cutting surface on one side of the drill blade body (1) is 1-4 groups, and the width L of each group of chip breaker grooves (5) is in the range of 1.5-6 mm, and the extension lines of the cutting edges (53) all intersect at the center of the drill blade.

3. A front groove multi-edge centripetal insert drill bit blade according to claim 1 or 2, characterized in that: The chip breaker grooves (5) are in the shape of fish scales, and when there are 2 to 4 groups of chip breaker grooves, they are arranged in a stepped manner.

4. The front groove multi-edge centripetal insert drill bit blade according to claim 1, characterized in that: The angle between the front cutting surface (51) provided on the chip breaker groove (5) and the vertical direction is 12°.

5. The front groove multi-edge centripetal insert drill bit blade according to claim 2, characterized in that: The drill point angle of the drill bit blade body (1) is 130°, and the angle between the rear cutting surface (4) on the back side and the lateral direction is 23°.

6. The front groove multi-edge centripetal insert drill bit blade according to claim 1, characterized in that: The positioning holes (3) are holes of a truncated cone structure, and the truncated cones of the two groups of positioning holes (3) are in opposite directions.

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