CN211101743U

CN211101743U - Hard alloy drill bit for titanium alloy hole machining

Info

Publication number: CN211101743U
Application number: CN201921920251.6U
Authority: CN
Inventors: 杨德志
Original assignee: Guizhou Southwest Tool Group Co Ltd
Current assignee: Guizhou Southwest Tool Group Co Ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-07-28
Anticipated expiration: 2029-11-08

Abstract

The utility model discloses a carbide drill bit for titanium alloy spot facing work, including the handle of a knife and be connected cutting portion as an organic whole with the handle of a knife, be provided with two spiral all edges symmetrically on cutting portion's circumference, be provided with spiral chip groove between two spiral all edges, be provided with the drill point at cutting portion's tip, seted up the chip groove symmetrically on the drill point. The utility model is symmetrically provided with the chip grooves on the drill point, thus avoiding the accumulation of cutting chips and the obstruction of the drill bit in the cutting process; and simultaneously, the utility model discloses a two all edges are connected through the chisel edge in drill point department to eliminate the sharp point that the drill point goes out, protect the drill point and be difficult for collapsing scarcely, improve the life of cutter.

Description

Hard alloy drill bit for titanium alloy hole machining

Technical Field

The utility model relates to a carbide drill bit for titanium alloy spot facing work belongs to machining cutter technical field.

Background

The titanium alloy has light weight and high temperature resistance, is widely applied to industries such as aviation, aerospace, ships, chemical engineering and the like, and has low density and high strength; the cutting temperature is high, and the thermal conductivity is poor; the work hardening is severe; the plasticity is small and the brittleness is large; the drill bit has the processing characteristics of small elastic modulus, large elastic recovery and the like, so the requirement on the cutter is higher, the service life of the conventional drill bit is short when processing titanium alloy, and the situations of edge breakage, chip winding, cutter breakage and the like are occasionally caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a carbide drill bit for titanium alloy spot facing work, this drill bit has long service life, the processing cost is lower, the reliable advantage of product quality.

In order to achieve the above object, the utility model provides a following technical scheme: a hard alloy drill bit for titanium alloy hole machining comprises a tool shank and a cutting part connected with the tool shank into a whole, wherein two spiral peripheral edges are symmetrically arranged on the circumference of the cutting part, a spiral chip discharge groove is formed between the two spiral peripheral edges, a drill tip is arranged at the end part of the cutting part, and the chip discharge groove is symmetrically formed in the drill tip.

Further, the two spiral peripheral edges are connected at the drill point through the chisel edge, and the azimuth angle of the chisel edge is 52-57 degrees.

Further, the flute anterior angle of flute is 6 ~ 8, and the flute azimuth angle is 25 ~ 30.

Furthermore, the cutting edge apex angle of the drill point is 138-142 degrees, and the helix angle of the spiral chip groove is 25-30 degrees.

Furthermore, the front angle of the spiral peripheral edge is 5-8 degrees, and the back angle is 13-15 degrees.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model is symmetrically provided with the chip grooves on the drill point, thus avoiding the accumulation of cutting chips and the obstruction of the drill bit in the cutting process; and simultaneously, the utility model discloses a two all edges are connected through the chisel edge in drill point department to eliminate the sharp point that the drill point goes out, protect the drill point and be difficult for collapsing scarcely, improve the life of cutter.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a cross-sectional view F-F of FIG. 1;

FIG. 4 is a partial cross-sectional view A-A of FIG. 2;

fig. 5 is a partial sectional view of E-E of fig. 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail with reference to the accompanying drawings and examples.

The embodiment of the utility model provides a structural schematic diagram of carbide drill bit for titanium alloy spot facing work is as shown in fig. 1-5, cutting part 2 as an organic whole is connected including handle of a knife 1 and with handle of a knife 1, be provided with two spiral week edges 3 on the circumference of cutting part 2 symmetrically, be provided with spiral chip groove 4 between two spiral week edges 3, be provided with drill point 5 at the tip of cutting part 2, seted up chip pocket 6 symmetrically on drill point 5, two spiral week edges 3 are connected through the chisel edge in drill point 5 department, and chisel edge azimuth j is 52, chip pocket 6's chip pocket rake angle z is 6, and chip pocket azimuth k is 25 angle, the cutting edge apex angle β of drill point 5 is 138-142, and the helix angle α of spiral chip pocket 4 is 25 angle, spiral week edge 3's rake angle y is 5, and its back angle x is 13.

In summary, the chip flutes 6 are symmetrically arranged on the drill tip 5, so that the cutting chips are prevented from being accumulated, and the drill bit is prevented from being blocked in the cutting process; and simultaneously, the utility model discloses a two all edges are connected through the chisel edge in drill point department to eliminate the sharp point that the drill point goes out, protect the drill point and be difficult for collapsing scarcely, improve the life of cutter.

Claims

1. The utility model provides a carbide drill bit for titanium alloy spot facing work, includes handle of a knife (1) and is connected cutting portion (2) as an organic whole with handle of a knife (1), its characterized in that: two spiral peripheral edges (3) are symmetrically arranged on the circumference of the cutting part (2), a spiral chip removal groove (4) is arranged between the two spiral peripheral edges (3), a drill tip (5) is arranged at the end part of the cutting part (2), and chip removal grooves (6) are symmetrically arranged on the drill tip (5).

2. The cemented carbide drill bit for titanium alloy hole machining as claimed in claim 1, characterized in that: the two spiral peripheral edges (3) are connected at the drill point (5) through a chisel edge, and the azimuth angle (j) of the chisel edge is 52-57 degrees.

3. The cemented carbide drill bit for titanium alloy hole machining as claimed in claim 1, characterized in that: the flute rake angle (z) of the flute (6) is 6-8 degrees, and the flute azimuth angle (k) is 25-30 degrees.

4. The cemented carbide drill for titanium alloy boring according to claim 1, wherein the cutting edge apex angle (β) of the drill tip (5) is 138-142 °, and the helix angle (α) of the helical flutes (4) is 25-30 °.

5. The cemented carbide drill bit for titanium alloy hole machining as claimed in claim 1, characterized in that: the front angle (y) of the spiral peripheral edge (3) is 5-8 degrees, and the back angle (x) is 13-15 degrees.