CN219464849U - Drill bit with cutting edge - Google Patents

Abstract

The utility model discloses a drill bit with cutting edges, which comprises a drill bit body, wherein the drill bit body comprises a spiral section, a head part integrally arranged at the front end of the spiral section and blade parts integrally arranged at the front end of the head part, the spiral section comprises at least two spiral grooves, the blade parts are uniformly distributed along the circumferential direction of the center of the drill bit, each blade part comprises a group of blade surfaces along the circumferential direction of the center of the drill bit, the upper ends of the two groups of blade surfaces are adjacently formed with first blade lines, the two ends of the first blade lines extend along the radial direction of the center of the drill bit, the first blade lines of the blade parts are converged at the center position of a drill hole and are formed with tips, one end of each first blade line, which is arranged corresponding to the center position of the drill bit, is higher than the other end of each first blade line, the other end of each first blade line is formed with a convex cutting part, and the cutting part is lower than the tips in the axial height of the drill bit. The utility model provides a drill bit with higher drilling efficiency.

Description

Drill bit with cutting edge

Technical Field

The utility model relates to a drill bit with a cutting edge.

Background

The Chinese patent of the applicant before the day discloses a three-edge drill (CN 216780437U) which mainly comprises a cutter body at the front end and a clamping part at the rear end, wherein the cutter body comprises a spiral section, a head part integrally arranged at the front end of the spiral section and three raised edge parts integrally arranged at the front end of the head part. The blade has two adjoining facets, the two facets of the blade being disposed obliquely relative to each other and having different facet areas. The spiral section comprises three spiral grooves which are mutually wound, and each through groove is respectively communicated with one of the gaps and the spiral grooves.

The practical application of the patent mentioned above finds that when drilling for some objects of special material, for example for reinforced concrete, when the drill bit encounters the steel bar, there is a blocking and the drilling efficiency is low.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the drill bit with the cutting edge, which has higher drilling efficiency.

In order to achieve the above-mentioned object, the present utility model provides a drill with cutting edges, including a drill body, the drill body includes a spiral section, a head integrally disposed at the front end of the spiral section, and cutting edges integrally disposed at the front end of the head, the spiral section includes at least two spiral grooves disposed coaxially with the drill body, the cutting edges are uniformly disposed circumferentially along the center of the drill, each of two circumferential sides of the cutting edges along the center of the drill includes a set of cutting edges, upper ends of the two sets of cutting edges are adjacently formed with a first cutting edge line, both ends of the first cutting edge line are disposed to extend in a radial direction of the center of the drill, the first cutting edge lines of the cutting edges are converged at a center position of a drill hole and form a tip, during the drilling process, the tip can function as a supporting and applying point, one end of the first cutting edge line disposed at a position corresponding to the center position of the drill is higher than the other end thereof in an axial height of the drill, the front end of the drill can take a sharp shape, the other end of the first cutting edge line is formed with a convex cutting edge, the cutting edge line is formed at the other end of the cutting edge line, and the cutting edge line is disposed at a position lower than the tip height than the tip in the axial height of the axial direction, and the cutting edge line is more effective in the drilling.

Further, the first cutting edge line is wavy in view along the axial direction of the drill bit, so that the cutting effect and the structural strength of the cutting edge can be further improved.

Further, the blade part comprises two arc-shaped first blade surfaces along one side of the center circumference of the drill, the two arc-shaped first blade surfaces are adjacent to form a second blade line, one end of the second blade line extends to the front end of the cutting part and is connected with the first blade line, and the blade part comprises the arc-shaped second blade surfaces along the other side of the center circumference of the drill. The connection cooperation of first blade line and second blade line makes the cutting part of protruding form wholly present toper structure, can improve its cutting effect and structural strength.

Further, a spiral blade is arranged in the spiral groove, a uniform space is reserved between the spiral blade and two side walls of the spiral groove, and the cutting edge of the spiral blade is positioned at the inner side of the spiral groove. The spiral groove is used for conveying and discharging fragments generated during drilling towards the rear of the drill bit along the drill bit, and the arrangement of the spiral blade can further cut and crush fragments positioned in the spiral groove, so that the fragments become finer fragments, and the discharge effect of the fragments is improved.

As one scheme, the cutting part is at least three, a gap is formed between the front end of the head of the drill bit body and the side face of the cutting part, a communicating groove communicated with the gap and the spiral groove is formed in the side part of the head of the front end of the spiral section, fragments generated during drilling firstly enter the gap and then are discharged into the spiral groove through the communicating groove, and the discharging effect of the fragments is improved.

As another scheme, the two cutting edges are arranged at the front end of the head part of the drill bit body, the two groups of the cutting edges are coated on two sides of the two cutting edges, each group of the cutting edges comprises two cutting edges which are respectively connected with the side parts of the two cutting edges, the two cutting edges are adjacently formed with a third cutting edge line which is inclined relative to the axis of the drill bit, the design of the cutting edges can improve the whole sharpness of the front end of the drill bit, improve the drilling effect, and in addition, the drill bit body can also play a role in protecting the cutting edges, improve the structural strength of the cutting edges, the side parts of the head part also comprise two flat guide surfaces which are respectively connected between the two groups of the cutting edges and the spiral groove,

the utility model has the beneficial effects that: compared with the existing drill bit, the drill bit disclosed by the utility model has the advantages that the whole structure is simple, the drill bit is convenient to process, the center of the drill bit is provided with the tip, the end part of the cutting edge line of the blade part of the drill bit is also provided with the cutting part which is lower than the tip in height, and by adopting the structure, the drilling speed can be improved, the blocking is not easy to generate in the drilling process, and the drill bit has a better use effect particularly when drilling on reinforced concrete.

Drawings

FIG. 1 is a block diagram of a portion of an embodiment of the present utility model;

FIG. 2 is a top view of an embodiment of the present utility model;

FIG. 3 is a partial block diagram of another embodiment of the present utility model;

fig. 4 is a top view of another embodiment of the present utility model.

Detailed Description

An embodiment of the drill with cutting edge of the present utility model is shown in fig. 1-2: the drill bit comprises a drill bit body, the drill bit body comprises a spiral section 1, a head 2 integrally arranged at the front end of the spiral section 1, and a blade 3 integrally arranged at the front end of the head 2, wherein the spiral section 1 comprises spiral grooves 11 coaxially arranged with the drill bit body, at least two blades 3 are uniformly distributed along the circumferential direction of the drill bit center, in the embodiment, the four blades 3 are in a crisscross structure, the two sides of the blade 3 along the circumferential direction of the drill bit center respectively comprise a group of blade surfaces 31, the upper ends of the two groups of blade surfaces 31 are adjacently formed with a first blade line 32, the two ends of the first blade line 32 are arranged in an extending manner along the radial direction of the drill bit center, the first blade line 32 is wavy along the axial direction of the drill bit, the cutting effect and the structural strength of the blade 3 can be improved, the first blade lines 32 of the blade 3 are converged at the center position of the drill bit, in the drilling process, the tips 30 can play the roles of supporting and applying force points, the first blade lines 32 are correspondingly arranged at the center positions of the drill bit center, and the cutting edges are higher than the sharp edges 33 at the axial ends of the other ends of the drill bit, and the tip ends are higher than the sharp edges 33, and the sharp edges are more difficult to form the cutting effect at the axial ends of the end of the drill bit, and the sharp edges are higher than the sharp edges 33 are more than the sharp edges at the axial ends of the end surfaces, and the sharp edges are better than the cutting edges are higher than the cutting point. For example, when drilling reinforced concrete and encountering a reinforcing bar, it can improve the efficiency of cutting the reinforcing bar and reduce the blockage during drilling.

The group of cutting edges 31 of the cutting part 3 along one side of the center circumference of the drill bit comprises two arc-shaped first cutting edges 31a, the two first cutting edges 31a are adjacent to form a second cutting edge line 34, one end of the second cutting edge line 34 extends to the front end of the cutting part 33 and is connected with the first cutting edge line 31, and the other side of the cutting part 3 along the center circumference of the drill bit comprises arc-shaped second cutting edges 31b. The connection and cooperation of the first cutting edge line 32 and the second cutting edge line 34 make the whole of the convex cutting portion 33 take on a tapered structure, so that the cutting effect and the structural strength thereof can be improved.

The spiral groove 11 is provided with a spiral blade 111, a uniform space is reserved between the spiral blade 111 and two side walls of the spiral groove 11, the cutting edge of the spiral blade 111 is positioned on the inner side of the spiral groove 11, and the spiral blade 111 cannot be in direct contact with the side walls of a drilled hole in the drilling process. The spiral groove 11 is used for conveying and discharging fragments generated during drilling along the drill bit to the rear of the drill bit, and the spiral blade 111 can further cut and crush fragments positioned in the spiral groove 11, so that the fragments become finer fragments, and the discharge effect of the fragments is improved.

In this embodiment, a gap 21 is formed between the front end of the head 2 of the drill body and the side surface of the blade 3, the side portion of the head 2 at the front end of the spiral section 1 is provided with a communication groove 22 for communicating the gap 21 with the spiral groove 11, and fragments generated at the front end of the drill head during drilling first enter the gap 21 and then are discharged into the spiral groove 11 through the communication groove 22, so that the discharge effect of the fragments is improved.

As an alternative to the above embodiment, the number of the blade parts 3 may be three or more.

In another embodiment, the same structures of the blade parts 3 and the spiral grooves 11 are adopted as the above embodiments, only the number of the blade parts 3 is different, and the structure of the head part 2 is different, as shown in fig. 3-4, another embodiment, the number of the blade parts 3 is two, the front end of the head part 2 of the drill body comprises two groups of chamfer surfaces 23, the two groups of chamfer surfaces 23 are wrapped and arranged at two sides of the two blade parts 3, each group of chamfer surfaces 23 comprises two chamfer surfaces 23 respectively connected with two side parts of the two blade parts 3, the two chamfer surfaces 23 are adjacent to each other to form a third cutting edge line 231 inclined relative to the drill axis, the design of the chamfer surfaces 23 can improve the whole sharpness of the front end of the drill, improve the drilling effect, and in addition, the protection effect of the blade parts 3 can be also achieved, the structural strength of the blade parts 3 is improved, the side parts of the head part 2 further comprise two flat guide surfaces 24, the two guide surfaces 24 are respectively connected between the two groups of chamfer surfaces and the spiral grooves 11, and each guide surface 24 is connected with one of the corresponding chamfer surfaces 23. During drilling, a gap is left between the guide surface 24 and the inner wall of the hole, and fragments generated during drilling are guided into the spiral groove 11 along the guide surface 24.

In the above embodiments, the spiral section 1 is made of chrome alloy, the blade 3 is made of tungsten steel, and the blade 3 is fastened and arranged at the front end of the spiral section 1 by welding, tight fitting or the like.

The above embodiment is only one of the preferred embodiments of the present utility model, and common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are included in the scope of the present utility model.

Claims (6)

1. The utility model provides a take drill bit of cutting edge, includes the drill bit body, the drill bit body including spiral section, integrative head, the integrative cutting edge portion that sets up in the head front end of setting in spiral section front end, the spiral section including the helicla flute with the coaxial setting of drill bit body, its characterized in that: the cutting edge comprises at least two cutting edge parts, wherein the cutting edge parts are uniformly distributed along the circumferential direction of the center of the drill bit, each of two circumferential sides of the cutting edge part along the center of the drill bit comprises a group of cutting edge surfaces, the upper ends of the two groups of cutting edge surfaces are adjacently formed with a first cutting edge line, the two ends of the first cutting edge line extend along the radial direction of the center of the drill bit, the first cutting edge lines of the cutting edge parts are converged at the center position of the drill bit and are formed with tips, one end of each first cutting edge line, which corresponds to the center position of the drill bit, is higher than the other end of each first cutting edge line in the axial direction of the drill bit, and the other end of each first cutting edge line is provided with a protruding cutting part, and the cutting part is lower than the tips in the axial direction of the drill bit.

2. The drill with cutting edges according to claim 1, wherein: the first cutting edge line is wavy as seen in the axial direction of the drill bit.

3. The drill with cutting edges according to claim 2, wherein: the cutting edge part comprises two arc-shaped first cutting edges along one side of the center circumference of the drill bit, the two first cutting edges are adjacent to form a second cutting edge line, one end of the second cutting edge line extends to the front end of the cutting part and is connected with the first cutting edge line, and the cutting edge part comprises arc-shaped second cutting edges along the other side of the center circumference of the drill bit.

4. A drill with cutting edges according to claim 3, characterized in that: the spiral groove is internally provided with a spiral blade, a uniform interval is reserved between the spiral blade and two side walls of the spiral groove, and the cutting edge of the spiral blade is positioned at the inner side of the spiral groove.

5. The drill with cutting edges according to claim 1, wherein: the drill bit comprises a drill bit body, at least three blade parts, wherein a notch is formed between the front end of the head of the drill bit body and the side face of the blade part, and the side part of the head of the front end of the spiral section is provided with a communicating groove which communicates the notch with the spiral groove.

6. The drill with cutting edges according to claim 1, wherein: the front end of the head part of the drill bit body comprises two groups of chamfer surfaces, each group of chamfer surfaces comprises two chamfer surfaces which are respectively connected with the side parts of the two blade parts, the side parts of the head part also comprise two flat guide surfaces, the two guide surfaces are respectively connected between the two groups of chamfer surfaces and the spiral groove, and the two chamfer surfaces are adjacently formed with a third cutting edge line which is inclined relative to the axis of the drill bit.