CN216227120U

CN216227120U - Drilling cutter capable of reducing edge explosion

Info

Publication number: CN216227120U
Application number: CN202122025223.1U
Authority: CN
Inventors: 刘晓明
Original assignee: Hubei Xinyunxiang Technology Development Co ltd
Current assignee: Hubei Xinyunxiang Technology Development Co ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2022-04-08
Anticipated expiration: 2031-08-26

Abstract

The utility model provides a drilling cutter capable of reducing edge burst, which comprises a cutter body and a blade welded on the cutter body, wherein: the blade comprises two main cutting edges and two cutting edges, the two main cutting edges are positioned at the front end of the cutter body, the two main cutting edges are arranged at intervals up and down, and the edges of the two main cutting edges face to a rotating central shaft vertical to the cutter body; the two cutting edges are positioned on two sides of the cutter body and are arranged at intervals left and right, the bottom end surfaces of the two cutting edges form a third included angle with the rotating surface, the rotating surface is the processing surface of the two cutting edges, the directions of the knife edges on two sides of the two cutting edges form a fourth included angle with the rotating central shaft of the cutter body, and the direction of the knife edge on the bottom forms a fifth included angle with the rotating surface; the two cutting edges are more forward than the two main cutting edges in the cutter body direction; the machining diameter D2 of the two main cutting edges is smaller than the machining diameter D1 of the two cutting edges, and the utility model has the advantage of reducing the problem of edge burst during drilling.

Description

Drilling cutter capable of reducing edge explosion

Technical Field

The utility model relates to the field of blades, in particular to a drilling cutter capable of reducing edge burst.

Background

The drilling knife is widely applied to the industrial field, and greatly facilitates the work of people.

The tool bit of present drilling sword becomes V type usually, and the center evagination, the during operation, and main cutting edge takes lead the contact work piece, and the wearing and tearing of blade are comparatively serious, very big influence the life of drilling sword, and because the size in hole is the same with main cutting edge diameter of rotation, under the condition that the blade vibration is difficult to avoid, very easily produce the limit of exploding to influence normal work.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drilling cutter capable of reducing edge burst, and solves the technical problem that the existing drilling cutter is easy to generate edge burst.

In a first aspect, the present invention provides a drilling tool for reducing edge burst, comprising a tool body and a blade welded to the tool body, wherein:

the blade comprises two main cutting edges and two cutting edges, the two main cutting edges are positioned at the front end of the cutter body, the two main cutting edges are arranged at intervals up and down, and the edges of the two main cutting edges face to a rotating central shaft vertical to the cutter body;

the two cutting edges are positioned on two sides of the cutter body and are arranged at left and right intervals, the bottom end surfaces of the two cutting edges form a third included angle with the rotating surface, the rotating surface is a processing surface of the two cutting edges, the directions of the edges on two sides of the two cutting edges form a fourth included angle with the rotating central shaft, and the direction of the bottom edge forms a fifth included angle with the rotating surface;

the two cutting edges are more forward than the two main cutting edges in the axial direction of the cutter body;

the machining diameter D2 of the two main cutting edges is smaller than the machining diameter D1 of the two cutting edges.

Further: two main cutting edges all become first contained angle with the rotation center axle, and two cutting edges all become the second contained angle with the rotation center axle, and first contained angle m value range is 0 ° < m <60 °, and second contained angle n value range is 0 ° < n <60 °.

Further: the difference between D1 and D2 is in the range of 0.2-1 mm.

Further: the two cutting edges are both block-shaped blades.

Further: the lengths of the edges of the two main cutting edges are less than D2/2 and greater than D2/2, respectively.

Further: the fourth included angle is equal to the second included angle, the fifth included angle is equal to the third included angle, and the value range of the third included angle t is 0 degrees and less than t <60 degrees.

The utility model has the beneficial effects that:

1. because two cutting edges are more preceding than two main cutting edges on the cutter body direction, the machining diameter D2 of two main cutting edges is less than the machining diameter D1 of two cutting edges, and two cutting edge bottom end surfaces all become the third contained angle with the rotating surface, so two cutting edges can contact the work piece earlier and cut off the marginal part in the processing hole of two main cutting edges to reduce the edge burst.

2. The value range of the first included angle m is 0 degrees < m <60 degrees, the value range of the second included angle n is 0 degrees < n <60 degrees, the value range of the third included angle t is 0 degrees < t <60 degrees, the proper inclination angles of the two cutting edges and the two main cutting edges are ensured, and therefore cutting work is well finished.

3. The difference between D1 and D2 is 0.2-1 mm, so that the two cutting edges can just cut off the edge parts of the processing holes of the two main cutting edges, and the two main cutting edges are not too much or too little.

4. Two cutting edges are blocky blades, and the blocky blade bearing capacity is stronger, is of value to promoting blade life.

5. The lengths of the edges of the two main cutting edges are respectively less than D2/2 and greater than D2/2, and compared with the equal lengths of the two main cutting edges, the mode that one main cutting edge is greater than D2/2 can better cut the material in the central part.

Drawings

FIG. 1 is a front view of a reduced pop edge drilling tool of the present invention;

FIG. 2 is a side view of a reduced pop edge drilling tool of the present invention;

FIG. 3 is a top view of a reduced pop edge drilling tool of the present invention.

The reference numerals in the figures denote:

1. cutting edges; 2. a main cutting edge; 3. a cutter body; 4. a rotating central shaft of the cutter body; 5. the bottom end surfaces of the two cutting edges; d₁Cutting edge machining diameter; d₂The machining diameter of the main cutting edge; m, a first included angle; n, a second included angle; h. the difference value between the direction of the cutting edge at the front end of the cutter body and the main cutting edge; t, a third angle.

Detailed Description

The utility model will be described in further detail below with reference to the drawings and specific examples.

Fig. 1 is a front view of a drilling tool for reducing edge burst according to the present invention, wherein two main cutting edges 2 are located at the front end of a tool body 3, the two main cutting edges 2 are arranged at an interval from top to bottom, the edges of the two main cutting edges 2 face a central rotation axis 4 perpendicular to the tool body 3, and both cutting edges 1 form a second included angle n with the central rotation axis 4.

Fig. 2 is a side view of the drilling tool for reducing edge explosion, wherein two cutting edges 1 are positioned on two sides of a tool body 3, the two cutting edges 1 are arranged at left and right intervals, edge orientations on two sides of the two cutting edges 1 form a fourth included angle with a rotation central axis 4, an edge orientation on the bottom of the two cutting edges 1 forms a fifth included angle with a rotation surface, two main cutting edges 2 form a first included angle m with the rotation central axis 4, bottom end surfaces 5 of the two cutting edges 1 form a third included angle t with the rotation central axis, the two cutting edges 1 are more forward than the two main cutting edges 2 in the direction of the tool body 3, and the difference is h.

FIG. 3 is a top view of a burring-reducing boring cutter of the present invention, in which the lengths of the cutting edges of two main cutting edges 2 are respectively smaller than D₂A sum of,/2 and greater than D₂/2。

Fig. 1 to 3 show an embodiment of the present invention, which includes a cutter body 3 and a diamond blade welded on the cutter body, the diamond blade is divided into two cutting edges 1 and two main cutting edges 2, when drilling, the two cutting edges 1 are closer to the front than the two main cutting edges 2 in the direction of the cutter body 3, the difference is h, so the two cutting edges 1 contact the workpiece first, and cut the hole slot, and the two main cutting edges 2 process the diameter D₂Less than two cutting edges 1 to diameter D₁And two cutting edges 1 and the rotation central plane form a third included angle t, so before two main cutting edges 2 contact the workpiece, the cutting edges 1 can finish cutting the edge part of the processing hole of the main cutting edge 2 in one step, and then the main cutting edge 2 contacts the workpiece, which is beneficial to reducing edge explosion.

In another embodiment, the first angle is in a range of 0 ° < m <60 °, the second angle is in a range of 0 ° < n <60 °, and the third angle is in a range of 0 ° < t <60 °. The included angle m between the main cutting edge 2 and the rotating central shaft 4 and the included angle n between the cutting edge and the rotating central shaft 4 can ensure that the cutting surfaces of the main cutting edge 2 and the cutting edge 1 always contact with a workpiece in the machining process, and the cutting is facilitated. When the cutting edge 1 cuts, if a third included angle t formed by the end surface 5 at the bottom of the cutting edge 1 and the rotating central plane is greater than 60 degrees, the cutting depth of the inner edge of the cutting edge 1 is greater than the depth of the outer edge, so that the situation that two cutting edges 1 can just cut off the edge parts of the processing holes of the two main cutting edges 2 cannot be guaranteed, edge explosion can be caused, under the condition that the known third included angle t cannot be smaller than 0 degree, if t is equal to 0 degree, the end surface 5 at the bottom of the cutting edge 1 is a horizontal plane, the axial force is too large during cutting, and the blade is easy to damage.

In another embodiment, the cutting edge 1 is machined to a diameter D₁Diameter D of main cutting edge 2₂The difference range of (a) is 0.2-1 mm. When drilling, the cutting edge 1 contacts with the workpiece firstly, and the processing diameter is larger than that of the main cutting edge 2, D₁、D₂The difference range ensures that the two cutting edges 1 can just cut off the edge parts of the processing holes of the two main cutting edges 2, and the edge parts are not too much or too little.

In another embodiment both cutting edges 1 are block-shaped blades. Compared with the conventional blade, the cross section of the block-shaped blade in the cutting direction is larger, so that the block-shaped blade is stronger in bearing force, and the service life of the blade is greatly prolonged.

In another embodiment, the length of the cutting edges of the two main cutting edges 2 is less than D, respectively₂A sum of,/2 and greater than D₂/2. When drilling, the linear speed of the two main cutting edges 2 is proportional to the rotation radius, so the linear speed of the rotation center point is close to zero, making the cutting of the rotation center point difficult, when the length of a certain main cutting edge 2 is greater than D2/2, the rotation center point is finished by the main cutting edge 2, and the linear speed of the rotation center point is greater than zero at this moment.

Although the embodiments of the present application have been disclosed above, they are not limited to the details described in the description and the embodiments, and further modifications may be effected by those skilled in the art without departing from the general concept defined by the claims and their equivalents, which are not further elaborated herein.

Claims

1. A drilling tool for reducing flash, comprising a tool body (3) and a blade welded to the tool body (3), wherein:

the blade comprises two main cutting edges (2) and two cutting edges (1), the two main cutting edges (2) are positioned at the front end of the cutter body (3), the two main cutting edges (2) are arranged at intervals up and down, and the edges of the two main cutting edges (2) face to a rotating central shaft (4) which is perpendicular to the cutter body (3);

the two cutting edges (1) are positioned on two sides of the cutter body (3), the two cutting edges (1) are arranged at left and right intervals, a third included angle is formed between the bottom end surface (5) of each cutting edge (1) and a rotating surface, the rotating surface is a processing surface of each cutting edge (1), the direction of the knife edge on two sides of each cutting edge (1) and the rotating central shaft (4) form a fourth included angle, and the direction of the bottom knife edge and the rotating surface form a fifth included angle;

the two cutting edges (1) are more forward than the two main cutting edges (2) in the axial direction of the cutter body (3);

the machining diameter D2 of the two main cutting edges (2) is smaller than the machining diameter D1 of the two cutting edges (1).

2. The reduced pop edge drilling tool of claim 1, wherein: the two main cutting edges (2) form a first included angle with the rotating central shaft (4), and the two cutting edges (1) form a second included angle with the rotating central shaft (4);

the value range of the first included angle m is 0 degrees < m <60 degrees, and the value range of the second included angle n is 0 degrees < n <60 degrees.

3. The reduced pop edge drilling tool of claim 1, wherein: the difference between D1 and D2 is in the range of 0.2-1 mm.

4. The reduced pop edge drilling tool of claim 1, wherein: the two cutting edges (1) are thickened block-shaped blades.

5. The reduced pop edge drilling tool of claim 1, wherein: the lengths of the cutting edges of the two main cutting edges (2) are respectively less than D2/2 and more than D2/2.

6. The reduced pop edge drilling tool of claim 2, wherein: the fourth included angle is equal to the second included angle, the fifth included angle is equal to the third included angle, and the value range of the third included angle t is 0 degrees < t <60 degrees.