CN211250460U

CN211250460U - Drill bit

Info

Publication number: CN211250460U
Application number: CN201922200145.7U
Authority: CN
Inventors: 袁国强; 顾庆华
Original assignee: Shanghai Huanyu Logistics Technology Co Ltd
Current assignee: Shanghai Huanyu Logistics Technology Co Ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-08-14
Anticipated expiration: 2029-12-10

Abstract

The utility model discloses a drill bit, it is including the cutting part that is located the drill bit top, and the cutting part has: two main cutting edges symmetrically arranged by taking the center of the drill bit as a symmetrical center; the two secondary cutting edges are symmetrically arranged by taking the center of the drill bit as a symmetrical center, and the two secondary cutting edges are intersected at the center of the drill bit; the two secondary cutting edges are correspondingly connected with the two corresponding main cutting edges respectively so as to form two vertexes on the end surface of the cutting part, and the vertex is the highest point of the top end of the drill bit; each of which extends downwardly from a respective apex towards the centre of the drill so that the two minor cutting edges form a flute with a V-shaped longitudinal section around the centre of the drill. The drill bit overcomes the defects of the prior art, greatly improves the drilling efficiency of the container plate, and greatly meets the production requirements of the container, and has the advantages of ingenious structure, low manufacturing cost, time and labor saving in operation, durability and wide application range.

Description

Drill bit

Technical Field

The utility model relates to a machining tool especially relates to a machining tool for container processing.

Background

At present, wood floors, bamboo floors or bamboo floors of containers are fixed on bottom cross beams of the containers by self-tapping screws. And the number of drilled holes is large for each container, and 300 containers are required for each production, so that the number of drilled holes and the drilling operation intensity are very large.

In the standard twist drill used in the prior art, the main cutting edges are straight, the two main cutting edges are intersected at the drill center, a chisel edge is formed at the intersection position, and the chisel edge cannot form a sharp cutting edge. In addition, the cutting speed of the chisel edge is low, which greatly affects the drilling speed and thus the efficiency of the drilling operation on the container line, and also does not contribute to the reduction of the strength of the drilling operation.

In addition, standard twist drills of the prior art are highly susceptible to high drill temperatures in high strength drilling environments, which reduces their useful life and thereby increases their useful life.

Based on this, can see that the standard twist drill among the prior art has not satisfied the requirement of container assembly line drilling operation environment well, consequently, expects to obtain a drill bit, and it can solve prior art not enough well, improves drilling efficiency, reduces drilling operation intensity, and operation process labour saving and time saving. And the manufacturing cost is low, the durability is realized, and the application range is wide.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a drill bit, this drill bit has overcome the not enough of prior art, has greatly improved the drilling efficiency of container board, has satisfied the container production requirement fabulous. The drill bit has the advantages of ingenious structure, low manufacturing cost, time and labor saving in operation, durability and wide application range.

In order to achieve the above object, the present invention provides a drill bit, which includes a cutting portion located at a top end of the drill bit, the cutting portion having:

two main cutting edges symmetrically arranged by taking the center of the drill bit as a symmetrical center;

the two secondary cutting edges are symmetrically arranged by taking the center of the drill bit as a symmetrical center, and the two secondary cutting edges are intersected at the center of the drill bit;

the two secondary cutting edges are correspondingly connected with the two corresponding main cutting edges respectively so as to form two vertexes on the end surface of the cutting part, and the vertex is the highest point of the top end of the drill bit;

each of which extends downwardly from a respective apex towards the centre of the drill so that the two minor cutting edges form a flute with a V-shaped longitudinal section around the centre of the drill.

Among the drill bit, the cutting portion includes main cutting edge and vice cutting edge, and correspond the point that links up and form by main cutting edge and vice cutting edge and formed the chisel edge structure that replaces prior art for the cutting portion reduces to the contact point with the object contact surface of treating drilling, has greatly improved drilling conditions, has solved the problem that prior art faced when driling fabulously. And, the drill bit because do not have prior art's chisel edge structure, consequently the drill bit when driling, do not have the problem that the chisel edge brought, have better drilling efficiency, just the drill bit can with the heavy feed volume phase-match, can realize high-speed high-efficient drilling.

Additionally, the drill bit can be more stable in mechanical structure because structurally as a fulcrum through the summit, therefore can not set up the pilot drill. The scheme does not set a centering drill, and has no influence on the quality of a floor hole drilled by the container. Simultaneously because the drill bit can operate under the condition of no centering drill, consequently, the drill bit can accurately drill on loose wooden container floor, just the drill bit can operate in the condition of no centering drill and still be favorable to its when boring the steel structure, guarantee the position and the shape of drilling.

Additionally, the drill bit set up main cutting edge and vice cutting edge into central symmetry for the drill bit is when driling, and the atress is even, and two summits can share the axial force jointly, reduce the rate of wear on summit.

Further, in the drill of the present invention, the distance between the two vertexes is D, and the length of D is 25-40% of the outer diameter D of the drill.

Further, in the drill according to the present invention, the included angle α between the two minor cutting edges is 96 to 119 °.

Above-mentioned scheme, consider about 90 of grinding angle of drill bit processing equipment abrasive machine, and the cutting portion of drill bit need carry out twice tow sides, if contained angle between the minor cutting edge in the cutting portion is greater than the grinding angle of drill bit processing equipment abrasive machine, then can be convenient for process. In addition, in order to ensure that the cutting part of the scheme can take the sharpness and the strength into consideration, and therefore, a substitute machining workpiece (such as a wood floor or a steel bottom beam) can be drilled more stably, more quickly and more accurately, the included angle alpha between the two secondary cutting edges is set to be 96-119 degrees, the wear resistance and the durability can be relatively improved by about 20 percent, the hole position degree and the roundness after forming can be ensured to meet the requirements of a production process, and the arrangement is favorable for the smooth operation of subsequent self-tapping nail locking.

Further, in the drill according to the present invention, the included angle α between the two minor cutting edges is 98 to 108 °.

Furthermore, in the drill of the utility model, the included angle beta between the two main cutting edges is 151 plus 180 degrees, so that the drill of the utility model can cut into the workpiece to be processed more quickly when drilling, thereby completing the drilling work more quickly, improving the production efficiency, saving more time and labor,

further, in the drill of the present invention, the main cutting edge is a straight shape.

Further, in the drill of the present invention, the secondary cutting edge is a straight shape.

Further, in the drill of the present invention, the drill further includes a guide portion located below the cutting portion.

Further, in the drill according to the present invention, the drill further includes a shank portion at the lower end.

Further, in the drill of the present invention, a neck portion is further provided between the guide portion and the shank portion, and an outer diameter of the neck portion is smaller than an outer diameter of the guide portion

Drill bit compare in prior art have as follows advantage and beneficial effect:

the drill bit solve the not enough of prior art well, improve drilling efficiency, reduce drilling operation intensity, operation process labour saving and time saving has improved the drilling efficiency of container board in very big degree, has satisfied container production requirement fabulous.

Furthermore, the drill bit structure ingenious, low in manufacturing cost, durable lastingly, application scope is wide.

Additionally, the drill bit can be more stable in mechanical structure because structurally as a fulcrum through the summit, therefore can not set up the pilot drill. It should be noted that the drill bit of the present invention does not have the centering drill to drill the floor hole of the container. Simultaneously because the drill bit can operate under the condition of no centering drill, consequently, the drill bit can accurately drill on loose wooden container floor, just the drill bit can operate in the condition of no centering drill and still be favorable to its when boring the steel structure, guarantee the position and the shape of drilling.

It should also be noted that the drill bit sets up main cutting edge and vice cutting edge into central symmetry for the drill bit is when driling, and the atress is even, and two summits can share the axial effort jointly, reduce the rate of wear on summit.

Drawings

Fig. 1 is a schematic view of a drill bit according to the present invention in some embodiments.

Fig. 2 schematically illustrates the structure of the cutting portion of a drill according to the present invention in some embodiments.

Fig. 3 schematically illustrates, from another perspective, the cutting portion configuration of a drill bit according to the present invention in some embodiments.

Detailed Description

The drill bit according to the present invention will be further explained with reference to the drawings and the detailed description, but the explanation does not constitute an undue limitation to the technical solution of the present invention.

As shown in fig. 1, in the present embodiment, the drill includes a cutting portion 1 at the tip of the drill, a pilot portion 2 located below the cutting portion 1, a neck portion 3, and a shank portion 4 located at the lower end of the drill. Wherein the neck 3 is located between the guide 2 and the shank 4, and the outer diameter of the neck 3 is smaller than the outer diameter of the guide 2.

Of course, it should be noted that in some other embodiments, the drill may also include a cutting portion 1, a neck portion 3, and a shank portion 4. Or in other embodiments, the drill includes a cutting portion 1, a pilot portion 2, and a shank portion 4.

With regard to the structure of the cutting portion 1, reference may further be made to fig. 2 and 3, wherein fig. 2 schematically shows the structure of the cutting portion of the drill according to some embodiments of the present invention. Fig. 3 schematically illustrates, from another perspective, the cutting portion configuration of a drill bit according to the present invention in some embodiments.

As shown in fig. 2, and referring to fig. 3 as necessary, the cutting part 1 includes two main cutting edges 11 symmetrically disposed with respect to the center of the drill as a center of symmetry, and two minor cutting edges 12 symmetrically disposed with respect to the center of the drill as a center of symmetry, the two minor cutting edges 12 meeting at the center of the drill. The two minor cutting edges 12 are respectively and correspondingly engaged with the two corresponding major cutting edges 11 to form two vertexes Q on the end surface of the cutting portion 1, the vertexes Q are the highest points of the drill tip, and each minor cutting edge 12 extends downwards from the corresponding vertex Q toward the center of the drill, so that the two minor cutting edges 12 form a groove with a V-shaped longitudinal section around the center of the drill.

As can be seen with further reference to fig. 2 and 3, the main cutting edge 11 is straight and the secondary cutting edge 12 is also straight.

In order to ensure that the drill bit in the embodiment can drill a workpiece to be processed more stably, more quickly and more accurately when drilling, certain parameters of the drill bit can be further optimally set.

For example: in some embodiments, the distance between two vertices Q is D, which may have a length of 25-40% of the bit outer diameter D.

Another example is: in some other embodiments, the angle α between two minor cutting edges 12 may be 96-119 °, while in some more preferred embodiments, the angle α between two minor cutting edges 12 may be 98-108 °.

For another example: in some embodiments, the included angle β between the two main cutting edges 11 may be 151 and 180 °.

The above parameters are set in consideration of: because the grinding angle of the grinding wheel machine of the drill bit processing equipment is about 90 degrees, the cutting part 1 of the drill bit needs to carry out twice positive and negative surfaces, and if the included angle between the auxiliary cutting edges in the cutting part is larger than the grinding angle of the grinding wheel machine of the drill bit processing equipment, the processing is convenient. In addition, in order to make the cutting portion 1 of the present invention have both sharpness and strength, and thus, to more stably, quickly, and accurately perform piercing on a workpiece to be machined, the included angle α between the two minor cutting edges 12 may be set to 96 to 119 °, and a preferable range may be set to 98 to 108 °. In addition, the included angle alpha between the two secondary cutting edges 12 is set to be 96-119 degrees, so that the wear resistance and durability can be relatively improved by about 20 percent, and meanwhile, the position degree and the roundness of the formed hole can be ensured to meet the requirements of the production process. And the parameter setting is also beneficial to the smooth operation of the follow-up self-tapping screw locking.

To sum up, the drill bit solve the not enough of prior art well, improve drilling efficiency, reduce drilling operation intensity, operation process labour saving and time saving has improved the drilling efficiency of container board in very big degree, has satisfied the container production requirement fabulous.

It should be noted that the prior art in the protection scope of the present invention is not limited to the embodiments given in the present application, and all the prior art which is not contradictory to the solution of the present invention, including but not limited to the prior patent documents, the prior publications, and the like, can be incorporated into the protection scope of the present invention.

In addition, the combination of the features in the present application is not limited to the combination described in the claims of the present application or the combination described in the embodiments, and all the features described in the present application may be freely combined or combined in any manner unless contradictory to each other.

It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is obvious that the present invention is not limited to the above embodiments, and similar changes or modifications can be directly derived or easily suggested by those skilled in the art from the disclosure of the present invention, and all should fall within the protection scope of the present invention.

Claims

1. A drill bit comprising a cutting portion at a drill bit tip, the cutting portion having:

the two secondary cutting edges are correspondingly connected with the two corresponding main cutting edges respectively so as to form two vertexes on the end surface of the cutting part, and the vertexes are the highest points of the top end of the drill bit;

2. The drill bit of claim 1, wherein the two apexes are spaced apart by a distance D having a length of 25-40% of the bit outer diameter D.

3. Drill bit according to claim 1, characterized in that the angle α between the two minor cutting edges is 96-119 °.

4. A drill bit according to claim 3, characterized in that the angle α between the two minor cutting edges is 98-108 °.

5. The drill bit as claimed in claim 1, wherein the included angle β between the two main cutting edges is 151 ° and 180 °.

6. The drill bit of claim 1, wherein the primary cutting edge is straight.

7. The drill bit of claim 1, wherein the secondary cutting edge is straight.

8. The drill bit of claim 1, further comprising a pilot portion located below the cutting portion.

9. The drill bit of claim 8, further comprising a shank at a lower end.

10. The drill bit of claim 9, further comprising a neck portion between the pilot portion and the shank portion, the neck portion having an outer diameter less than an outer diameter of the pilot portion.