CN211539621U

CN211539621U - Twist drill with main cutting edge and asymmetric chip dividing grooves in circumference

Info

Publication number: CN211539621U
Application number: CN201922100365.2U
Authority: CN
Inventors: 赵鑫
Original assignee: Ningbo Liangtian Tools Industry & Trade Co ltd
Current assignee: Ningbo Liangtian Tools Industry & Trade Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-09-22
Anticipated expiration: 2029-11-29

Abstract

The utility model relates to the field of machining drilling, in particular to a twist drill with main cutting edges and asymmetric chip dividing grooves, wherein the top end of the drill body is provided with a chisel edge, the left side and the right side of the chisel edge are respectively provided with a first main cutting edge and a second main cutting edge, the first main cutting edge is provided with a plurality of first chip dividing grooves, and the second main cutting edge is provided with a plurality of second chip dividing grooves, the utility model can disperse the radial resistance during cutting by grinding the first chip dividing grooves and the second chip dividing grooves which are not equally divided on the circumference on the first main cutting edge and the second main cutting edge, thereby reducing the torque during cutting, reducing the load and power of a machine tool, reducing the friction and the heat generated during drilling, further prolonging the service life of the drill, improving the linear speed of drilling and the production efficiency, effectively dividing wider scrap iron chips, the chip is broken, thereby reducing the risk that the chip blocks the chip groove and the drill bit is broken.

Description

Twist drill with main cutting edge and asymmetric chip dividing grooves in circumference

Technical Field

The utility model relates to a machining drilling field specifically is a main cutting edge circumference asymmetric chip groove fluted drill.

Background

Because the torque and the axial force are larger when the standard twist drill drills, symmetrical machining resonance is easily generated by the symmetrical main cutting edge and the blade width. The invention of the gang drill can achieve the effect of reducing the torque and the axial force, and improves the processing life and the efficiency of the drill bit. But the grinding difficulty of the head part of the gang drill is relatively large, the mass production is not easy, and the practicability of market economy cannot be met. And most of drill tips, main cutting edges and main rear cutter faces of the drill bits ground by the gang drill are ground symmetrically, so that the risk of symmetrical machining resonance cannot be improved.

Therefore, in view of the above situation, there is an urgent need to develop a twist drill with main cutting edge having asymmetric chip dividing grooves in circumference to overcome the disadvantages in the current practical application.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a main cutting edge circumference asymmetric chip groove fluted drill to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a main cutting edge circumference asymmetric chip groove fluted drill, includes drill bit body, the drill bit body top is provided with the chisel edge, the chisel edge left and right sides is provided with first main cutting edge and second main cutting edge respectively, be provided with a plurality of first chip grooves on the first main cutting edge, be provided with a plurality of second chip grooves on the second main cutting edge.

As a further aspect of the present invention: the first main cutting edge and the second main cutting edge are symmetrically arranged.

As a further aspect of the present invention: the first chip groove and the second chip groove are arranged in a circumferential asymmetric mode in the radial plane direction.

As a further aspect of the present invention: the number of the first chip grooves and the number of the second chip grooves are not less than one.

As a further aspect of the present invention: the length of the first chip groove and the second chip groove on the back tool face is smaller than the width of the back tool face on the circumference.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the first chip groove and the second chip groove which are not equally divided on the circumference are ground on the first main cutting edge and the second main cutting edge, so that the radial resistance during cutting can be dispersed, the torque during cutting is further reduced, the load and the power of a machine tool are reduced, the same processing parameters are adopted, the friction and the heat generated during drilling can be reduced, the service life of the drill bit is further prolonged, the torque is reduced, the cutting heat is reduced, the linear speed of drilling is improved, the production efficiency is improved, the chip separation and the chip breaking are effectively carried out on wider scrap iron, the risk that the chip is blocked by the chip removal groove and the drill bit is broken is reduced, the large-scale production can be carried out, and the reproducibility is higher;

2. the length of the first chip groove and the second chip groove on the back cutter face is smaller than the width of the back cutter face on the circumference, so that the first chip groove and the second chip groove can disperse the torsion on the first main cutting edge and the second main cutting edge, can complement each other and can reduce the risk of generating symmetric resonance.

Drawings

Fig. 1 is a schematic structural diagram of a twist drill with main cutting edges and asymmetric chip dividing grooves in the circumference.

Fig. 2 is a top view of a twist drill with major cutting edges having circumferentially asymmetric chip flutes.

In the figure: 1-drill body, 2-chisel edge, 3-first main cutting edge, 4-second main cutting edge, 5-second chip splitter groove, 6-first chip splitter groove.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

Example 1

Referring to fig. 1-2, in an embodiment of the present invention, a twist drill with main cutting edges and asymmetric chip flutes comprises a drill body 1, wherein a chisel edge 2 is disposed at the top end of the drill body 1, a first main cutting edge 3 and a second main cutting edge 4 are disposed on the left and right sides of the chisel edge 2, a plurality of first chip flutes 6 are disposed on the first main cutting edge 3, a plurality of second chip flutes 5 are disposed on the second main cutting edge 4, and the first chip flutes 6 and the second chip flutes 5 which are circumferentially unequal are ground on the first main cutting edge 3 and the second main cutting edge 4, so that radial resistance during cutting can be dispersed, torque during cutting can be reduced, machine load and power can be reduced, friction and heat generated during drilling can be reduced by the same processing parameters, the service life of the drill can be prolonged, and due to reduction of torque and reduction of cutting heat, the linear speed of drilling is improved, production efficiency is improved, and the iron chips of wider are effectively divided and broken, so that the risk that the chips block the chip discharge groove and the drill bit is broken is reduced, large-scale production can be performed on a large scale, and reproducibility is higher.

Example 2

In this embodiment, the first major cutting edge 3 and the second major cutting edge 4 are symmetrically arranged.

In the present exemplary embodiment, the first chip flutes 6 and the second chip flutes 5 are arranged circumferentially asymmetrically in the radial plane direction.

In the present embodiment, the number of the first chip flutes 6 and the second chip flutes 5 is not less than one.

In this embodiment, the length of the first chip flute 6 and the second chip flute 5 on the flank is smaller than the width of the flank on the circumference, and the length of the first chip flute 6 and the second chip flute 5 on the flank is smaller than the width of the flank on the circumference, so that the first chip flute 6 and the second chip flute 5 can disperse the torsion on the first main cutting edge 3 and the second main cutting edge 4, complement each other, and reduce the risk of generating symmetric resonance.

The twist drill with the main cutting edge and the asymmetrical chip dividing grooves on the circumference can disperse the radial resistance during cutting by grinding the first chip dividing groove 6 and the second chip dividing groove 5 which are not equally divided on the circumference on the first main cutting edge 3 and the second main cutting edge 4, thereby reducing the torque during cutting, reducing the processing parameters with the same machine tool load and power, reducing the friction and heat generated during drilling, further prolonging the service life of the drill, improving the linear speed of drilling due to the reduction of the torque and the reduction of the cutting heat, improving the production efficiency, effectively dividing chips and breaking chips for wider scrap iron chips, thereby reducing the risk of the chips blocking the chip dividing grooves and breaking the drill, being capable of carrying out large-scale production in batches, having higher reproducibility, and enabling the first chip dividing groove 6 and the second chip dividing groove 5 to disperse the chip dividing grooves on the first main cutting edge 3 and the second main cutting edge 4 by enabling the length of the first chip dividing groove 6 and the second chip dividing groove 5 on the rear cutter face to be smaller than the width of the circumference, thereby enabling The torsion can complement each other and reduce the risk of generating symmetric resonance.

The above is only the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims

1. A twist drill with main cutting edges and asymmetric chip dividing grooves on the circumference comprises a drill main body (1), it is characterized in that the top end of the drill main body (1) is provided with a chisel edge (2), the left side and the right side of the chisel edge (2) are respectively provided with a first main cutting edge (3) and a second main cutting edge (4), a plurality of first chip flutes (6) are arranged on the first main cutting edge (3), a plurality of second chip flutes (5) are arranged on the second main cutting edge (4), the first main cutting edge (3) and the second main cutting edge (4) are symmetrically arranged, the first chip groove (6) and the second chip groove (5) are arranged in a circumferential asymmetric manner in the radial plane direction, the number of the first chip grooves (6) and the second chip grooves (5) is not less than one, the length of the first chip groove (6) and the second chip groove (5) on the rear cutter face is smaller than the width of the rear cutter face on the circumference.