CN110860724A

CN110860724A - Cutting tool with guide structure

Info

Publication number: CN110860724A
Application number: CN201911259748.2A
Authority: CN
Inventors: 李文学; 宋伟涛; 于大军; 郭威; 董硕; 刘旭磊
Original assignee: Zhuzhou Cemented Carbide Cutting Tools Co Ltd
Current assignee: Zhuzhou Cemented Carbide Cutting Tools Co Ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-03-06
Anticipated expiration: 2039-12-10
Also published as: CN110860724B

Abstract

The invention discloses a cutting tool with a guide structure, which comprises a cutting tool body and a long-strip-shaped guide strip, wherein a guide cavity matched with the guide strip is formed in the surface of the cutting tool body, the guide strip comprises a guide supporting surface, a bottom positioning surface and a positioning column, the positioning column is positioned on the bottom positioning surface, a deep groove cavity is formed in the guide supporting surface, a first cooling hole communicated with the deep groove cavity is formed in the positioning column, the guide cavity comprises a bottom supporting surface, a peripheral containing surface and a positioning hole, the positioning hole is formed in the bottom supporting surface, the bottom positioning surface is in contact fit with the bottom supporting surface, the peripheral containing surface is positioned on two sides of the bottom supporting surface, the positioning column is in interference fit with the positioning hole, and a second cooling hole communicated with the first cooling hole is further formed in the cutting tool body.

Description

Cutting tool with guide structure

Technical Field

The invention relates to the technical field of metal cutting machining, in particular to a cutting tool with a guide structure.

Background

In the field of metal cutting machining, particularly in the machining of hole parts with large length-diameter ratio, the cutter has large cutting vibration, the machining quality is influenced, the service life of the cutter is prolonged, and the reduction of the length-diameter ratio is the most effective method for inhibiting the vibration, namely, a common means in the prior art for arranging a guide support structure is adopted.

For example, chinese patent publication No. CN105636728A discloses a guide block structure for a cutting tool, which reduces a contact area by a middle clearance groove, and flows a cutting fluid through an external gap to form a supporting protective film, thereby reducing friction force and frictional heat between the guide bar and a hole wall, but in such a structure, since the pressure of the cutting fluid flowing from the outside is generally low, it is difficult to completely envelop the guide bar during high-speed cutting of the tool, rigid contact between the guide bar and the processed hole wall is inevitably caused, and a large amount of frictional heat is generated, and even burning of the processed surface may be caused.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a cutting tool with a guide structure, which has small guide contact area, small cutting vibration, stability and reliability.

In order to solve the technical problems, the invention adopts the following technical scheme:

the cutting tool with the guide structure comprises a cutting tool body and a long-strip-shaped guide strip, wherein a guide cavity matched with the guide strip is formed in the surface of the cutting tool body, the guide strip comprises a guide supporting surface, a bottom positioning surface and a positioning column, the positioning column is located on the bottom positioning surface, a deep groove cavity is formed in the guide supporting surface, a first cooling hole communicated with the deep groove cavity is formed in the positioning column, the guide cavity comprises a bottom supporting surface, a peripheral containing surface and a positioning hole, the positioning hole is formed in the bottom supporting surface, the bottom positioning surface is in contact fit with the bottom supporting surface, the peripheral containing surface is located on two sides of the bottom supporting surface, the positioning column is in interference fit with the positioning hole, and a second cooling hole communicated with the first cooling hole is further formed in the cutting tool body.

As a further improvement of the above technical solution:

the bottom surface of the deep groove cavity is V-shaped on the axial section of the cutting cutter body, the two sides of the deep groove cavity form an included angle K with the axial direction of the cutting cutter body, and the included angle K is larger than or equal to 1 degree and smaller than or equal to 5 degrees.

The first cooling holes are communicated with the deep groove cavity at the lowest part of the bottom surface of the deep groove cavity.

The deep groove cavity is a long and thin rectangular groove and is arranged along the axial direction of the cutting knife body.

The positioning column is a cylinder, and the positioning hole is a round hole.

The bottom positioning surface and the bottom supporting surface are planes, and the peripheral containing surface is a multi-section plane.

The guide cavities and the guide strips are arranged in a plurality and are uniformly distributed along the circumferential direction of the cutting cutter body.

Compared with the prior art, the invention has the advantages that:

according to the cutting tool with the guide structure, the guide cavity is used for accommodating the guide strip, the bottom positioning surface is in contact fit with the bottom bearing surface, the positioning column is in interference fit with the positioning hole, the positioning structure of the guide strip is simple, stable and reliable, and during cutting, machine tool cooling liquid enters the first cooling hole through the second cooling hole.

Drawings

Fig. 1 is a schematic view of a cutting tool having a guide structure according to the present invention.

Fig. 2 is a view a-a of the cutting tool with the guide structure of the present invention.

Fig. 3 is a view B-B of the cutting tool with the guide structure of the present invention.

Fig. 4 is a perspective view of a guide strip of a cutting tool having a guide structure according to the present invention.

Fig. 5 is a perspective view of another perspective of a guide strip of the cutting tool having a guide structure of the present invention.

Fig. 6 is a perspective view of a cutting tool body of the cutting tool having a guide structure of the present invention.

The reference numerals in the figures denote:

1. a cutting blade body; 2. a guide strip; 21. a guide support surface; 22. a bottom positioning surface; 23. a positioning column; 24. a deep groove cavity; 25. a first cooling hole; 3. guiding the die cavity; 31. a bottom support surface; 32. a peripheral receiving surface; 33. positioning holes; 4. a second cooling hole.

Detailed Description

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

Fig. 1 to 6 show an embodiment of a cutting tool with a guiding structure according to the present invention, which includes a cutting tool body 1, and further includes an elongated guiding strip 2, a guiding cavity 3 engaged with the guiding strip 2 is formed on a surface of the cutting tool body 1, the guiding strip 2 includes a guiding support surface 21, a bottom positioning surface 22, and a positioning column 23, the positioning column 23 is located on the bottom positioning surface 22, a deep groove cavity 24 is formed on the guiding support surface 21, a first cooling hole 25 communicated with the deep groove cavity 24 is formed on the positioning column 23, the guiding cavity 3 includes a bottom support surface 31, a peripheral accommodating surface 32, and a positioning hole 33, the positioning hole 33 is formed on the bottom support surface 31, the bottom positioning surface 22 is in contact fit with the bottom support surface 31, the peripheral accommodating surface 32 is located on two sides of the bottom support surface 31, the positioning column 23 is in interference fit with the positioning hole 33, a second cooling hole 4 communicated with the first cooling hole 25 is further formed on the cutting tool body 1, the guide cavity 3 is used for accommodating the guide strip 2, the bottom positioning surface 22 is in contact fit with the bottom bearing surface 31, the positioning column 23 is in interference fit with the positioning hole 33, the positioning structure of the guide strip 2 is simple, stable and reliable, during cutting, machine tool cooling liquid enters the first cooling hole 25 through the second cooling hole 4, because the guide supporting surface 21, the deep groove cavity 24 and the processed hole wall form a space close to a closed space, high-pressure cooling liquid flows out in a waterfall shape from between the guide supporting surface 21 and the hole wall, and further envelops the whole guide strip 2, a layer of supporting film is formed, the guide contact area is reduced, the guide strip 2 is prevented from being in rigid contact with the hole wall, cutting vibration is reduced, friction heat is reduced, and the surface processing quality is improved.

In this embodiment, the bottom surface of the deep groove cavity 24 is V-shaped on the axial cross section of the cutting tool body 1, and both sides form an included angle K with the axial direction of the cutting tool body 1, K is greater than or equal to 1 ° and less than or equal to 5 °, and the first cooling hole 25 is communicated with the deep groove cavity 24 at the lowest position of the bottom surface of the deep groove cavity 24, so that the high-pressure cooling liquid can smoothly flow out, where K =3 ° in this embodiment.

In this embodiment, the deep groove cavity 24 is a long and thin rectangular groove and is disposed along the axial direction of the cutting blade body 1, so that the coolant can flow to each region of the guide strip 2 conveniently, and a uniform support film is formed, so that the guiding is more stable and reliable.

In this embodiment, the positioning column 23 is a cylinder, and the positioning hole 33 is a circular hole, which is convenient for positioning and processing.

In this embodiment, the bottom positioning surface 22 and the bottom supporting surface 31 are flat surfaces, and the peripheral accommodating surface 32 is a multi-section flat surface.

In this embodiment, the guide cavities 3 and the guide strips 2 are all arranged in a plurality and are uniformly arranged along the circumferential direction of the cutting tool body 1, so that the guide is more stable and reliable.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. A cutting tool with a guiding structure, comprising a cutting tool body (1), characterized in that: the cutting tool body (1) is provided with a guide cavity (3) matched with the guide strip (2) on the surface, the guide strip (2) comprises a guide supporting surface (21), a bottom positioning surface (22) and a positioning column (23), the positioning column (23) is positioned on the bottom positioning surface (22), a deep groove cavity (24) is formed in the guide supporting surface (21), a first cooling hole (25) communicated with the deep groove cavity (24) is formed in the positioning column (23), the guide cavity (3) comprises a bottom supporting surface (31), a peripheral containing surface (32) and a positioning hole (33), the positioning hole (33) is formed in the bottom supporting surface (31), the bottom positioning surface (22) is in contact fit with the bottom supporting surface (31), and the peripheral containing surface (32) is positioned on two sides of the bottom supporting surface (31), the positioning column (23) is in interference fit with the positioning hole (33), and a second cooling hole (4) communicated with the first cooling hole (25) is further formed in the cutting cutter body (1).

2. The cutting tool with guide structure of claim 1, wherein: the bottom surface of the deep groove cavity (24) is V-shaped on the axial section of the cutting cutter body (1), the two sides of the deep groove cavity form an included angle K with the axial direction of the cutting cutter body (1), and the included angle K is larger than or equal to 1 degree and smaller than or equal to 5 degrees.

3. The cutting tool with guide structure of claim 2, wherein: the first cooling holes (25) are communicated with the deep groove cavity (24) at the lowest part of the bottom surface of the deep groove cavity (24).

4. The cutting tool with guide structure according to any one of claims 1 to 3, wherein: the deep groove cavity (24) is a long and thin rectangular groove and is arranged along the axial direction of the cutting tool body (1).

5. The cutting tool with guide structure according to any one of claims 1 to 3, wherein: the positioning column (23) is a cylinder, and the positioning hole (33) is a round hole.

6. The cutting tool with guide structure according to any one of claims 1 to 3, wherein: the bottom positioning surface (22) and the bottom supporting surface (31) are planes, and the peripheral accommodating surface (32) is a multi-section plane.

7. The cutting tool with guide structure according to any one of claims 1 to 3, wherein: the guide cavities (3) and the guide strips (2) are arranged in a plurality and are uniformly distributed along the circumferential direction of the cutting cutter body (1).