CN211840296U

CN211840296U - Drilling countersink with chip breaking and dividing functions

Info

Publication number: CN211840296U
Application number: CN202020338551.XU
Authority: CN
Inventors: 张一�; 李佳
Original assignee: Luoyang Sooner Precision Tools Co ltd
Current assignee: Luoyang Sooner Precision Tools Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-11-03
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a drilling countersink with chip breaking and dividing functions, which comprises a drill rod and a drill bit connected with the drill rod, wherein the drill bit is provided with two blades which are distributed in 180 degrees and are respectively a first blade and a second blade, and chip breaking grooves are arranged in front of the two blades; the first blade and the second blade are also respectively provided with a plurality of chip separating grooves, and the chip separating grooves on the two blades are distributed in a staggered mode. Has the advantages that: through chip breaker and chip-dividing groove in this application can effectually break off the cutting bits and cut apart long narrower cutting bits, excellent in use effect avoids the cutting bits to cause the injury to the work piece.

Description

Drilling countersink with chip breaking and dividing functions

Technical Field

The utility model relates to a bore countersink field, concretely relates to bore countersink with chip breaking and branch bits function.

Background

The countersink drill is used for processing a plane, a cylindrical surface, a conical surface and other molded surfaces on the end surface of a hole. When a cylindrical counter bore, a conical counter bore and an end boss are machined in the machined hole, counter boring drills are used. The countersink drill needs to use a countersink drill, the conventional countersink drill only has the function of chip breaking, but only can break chips for some long and wide cutting chips, the broken cutting chips are still large, certain damage is caused to a workpiece, and the chip removal effect is poor. Therefore, the drilling and reaming tool with the chip breaking and dividing functions is designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bore countersink with chip breaking and branch bits function just in order to solve above-mentioned problem, the chip breaking and branch bits of being convenient for improve the effect of chip removal.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the drilling and countersinking tool with the chip breaking and dividing functions comprises a drill rod and a drill bit connected with the drill rod, wherein two blades which are distributed in an angle of 180 degrees are arranged on the drill bit, the first blade and the second blade are respectively arranged on the drill bit, and chip breaking grooves are formed in the front of the two blades;

the first blade and the second blade are also respectively provided with a plurality of chip separating grooves, and the chip separating grooves on the two blades are distributed in a staggered mode.

Preferably, the chip flutes are inclined 4 ° to 7 ° to the central axis of the drill bit.

Preferably, the chip dividing grooves have the depth of 1.4mm-1.6mm, the width of 0.9mm-1.1mm and the relief angle of 10 degrees.

Preferably, the first blade and the second blade are both provided with a cutting edge, the inclination angle of the cutting edge is 14-16 degrees, and the width of the cutting edge is 2-3 mm.

Preferably, the width of the first blade and the second blade is 6mm-8mm, and the width of the cutting edge of the two blades is 1 mm.

Preferably, a blade guide strip is further provided on the back of the first blade and the second blade, and the blade guide strip is inclined at an angle of 30 °.

Has the advantages that: through chip breaker and chip-dividing groove in this application can effectually break off the cutting bits and cut apart long narrower cutting bits, excellent in use effect avoids the cutting bits to cause the injury to the work piece.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a perspective view of the present invention;

fig. 2 is a front view of the present invention;

FIG. 3 is a left side view structural diagram of FIG. 2;

fig. 4 is a side view of the blade of the present invention.

The reference numerals are explained below:

1. a drill stem; 2. a drill bit; 3. a first blade; 4. a second blade; 5. a cutting edge; 6. a chip breaker groove; 7. a chip dividing groove; 8. a margin; 9. the blade part is provided with a guide belt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-4, the utility model provides a bore countersink with chip breaking and chip dividing function, including drilling rod 1 and the drill bit 2 of being connected with drilling rod 1, drilling rod 1 and drill bit 2 welding. The drill bit 2 is provided with two blades distributed at 180 degrees, namely a first blade 3 and a second blade 4, the first blade 3 and the second blade 4 are respectively welded with two notch side faces arranged on the drill bit 2, and the blades are PCD blades. The front faces of the two inserts are provided with chip breakers 6, the angle of which chip breakers 6 is 120 ° (as in R3 in fig. 4). Still be equipped with a plurality of chip separation grooves 7 on first blade 3 with second blade 4 respectively, and the chip separation groove 7 position on these two blades is crisscross distributes, as in fig. 2, first blade 3 is provided with 4 chip separation grooves 7, and the distance of these 4 chip separation grooves 7 apart from side margin 8 is 3mm (d6), 7mm (d7), 11mm (d8), 15mm (d9) in proper order, and second blade 4 is provided with 5 chip separation grooves 7, and the distance of these 5 chip separation grooves 7 apart from side margin 8 is 1.5mm (d1), 5.5mm (d2), 9.5mm (d2), 13.5mm (d4), 17.5mm (d5) in proper order. The structure of the chip breaker 6 and the chip dividing groove 7 is adopted, wherein the chip breaker 6 can break the cutting chips with longer length, the chip dividing groove 7 can divide the cutting chips with wider width into narrower cutting chips, and the chip dividing grooves 7 of the two blades adopt a staggered structure, so that the chip breaking is more convenient, the chip breaking effect is improved, and the damage of the cutting chips to the workpiece is avoided.

As an alternative embodiment, the chip dividing groove 7 is uniformly inclined toward the central axis of the drill 2 by 4 ° to 7 °, i.e., an angle R1 in fig. 3, and preferably, the chip dividing groove 7 is inclined toward the central axis of the drill 2 by 5 °, so that the rigidity of the cutting edge 5 can be ensured.

Further, the chip dividing grooves 7 have a depth of 1.4mm to 1.6mm (d 11 in fig. 2), a width of 0.9mm to 1.1mm (d 10 in fig. 2), preferably a depth of 1.5mm and a depth of 1mm, and have a back angle of 10 °.

Furthermore, in order to improve the cutting effect, the first blade 3 and the second blade 4 are provided with a blade zone 8, the angle of inclination of the blade zone 8 is 14-16 degrees, the width is 2-3 mm, and preferably, the angle of inclination of the blade zone 8 is 15 degrees (as shown in R2 in figure 3), and the width is 2.5 mm. The width of the first blade 3 and the second blade 4 is 6mm-8mm, and the width of the cutting edge 5 of the two blades is 1mm, preferably, the width of the blade is 7 mm.

The back of the first blade 3 and the back of the second blade 4 are also provided with an edge part guide belt 9, and the inclination angle of the edge part guide belt 9 is 30 degrees, so that the chip removal is more flow.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a bore countersink with chip breaking and branch bits function which characterized in that: the drill bit is provided with two blades which are distributed at 180 degrees and are respectively a first blade and a second blade, and chip breakers are arranged in front of the two blades;

2. The drilling countersink with chip breaking and dividing functions as claimed in claim 1, wherein: the chip dividing grooves are inclined to the central axis of the drill bit by 4-7 degrees.

3. The drilling countersink with chip breaking and dividing functions as claimed in claim 2, wherein: the depth of the chip dividing groove is 1.4mm-1.6mm, the width of the chip dividing groove is 0.9mm-1.1mm, and the chip dividing groove is provided with a 10-degree back angle.

4. The drilling countersink with chip breaking and dividing functions as claimed in claim 1, wherein: the first blade and the second blade are both provided with a cutting edge, the inclination angle of the cutting edge is 14-16 degrees, and the width of the cutting edge is 2-3 mm.

5. The drilling countersink with chip breaking and dividing functions as claimed in claim 1, wherein: the width of the first blade and the width of the second blade are 6mm-8mm, and the width of the cutting edge of the two blades is 1 mm.

6. The drilling countersink with chip breaking and dividing functions as claimed in claim 1, wherein: the back of the first blade and the back of the second blade are also provided with an edge part guide belt, and the inclination angle of the edge part guide belt is 30 degrees.