CN219968453U

CN219968453U - PCD drill bit

Info

Publication number: CN219968453U
Application number: CN202321590708.8U
Authority: CN
Inventors: 余美亮; 刘光达; 石锡祥; 谢福海
Original assignee: Xiamen Maida Intelligent Technology Co ltd
Current assignee: Xiamen Maida Intelligent Technology Co ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-11-07
Anticipated expiration: 2033-06-21

Abstract

The utility model relates to a PCD drill bit, which comprises a cutting part and a handle part, wherein the surface of the cutting part is coated with a ta-C coating, the length of the cutting part is 12 mm-24 mm, and the thickness of the ta-C coating is 100-300 nm. The PCD drill bit of the utility model utilizes the properties of high hardness and low friction coefficient of the ta-C coating to reduce the friction coefficient of the surface of the PCD drill bit and increase the lubricity thereof, thereby more effectively removing chips in the process of processing monocrystalline silicon, improving the drilling quality and prolonging the service life of a cutter.

Description

PCD drill bit

Technical Field

The utility model relates to the technical field of monocrystalline silicon drilling cutters, in particular to a PCD drill bit.

Background

Polycrystalline diamond (Polycrystalline diamond, PCD for short) drill bit has the advantages of high hardness, high compressive strength, good thermal conductivity, good wear resistance and the like, can obtain higher machining precision and machining efficiency in high-speed cutting, and gradually becomes a popular product in industry.

With respect to the related art in the above, the inventors consider that there are the following drawbacks: at present, in the process of processing monocrystalline silicon, the PCD drill bit has insufficient lubrication in a chip groove of the PCD drill bit, so that chip blocking is easy to occur, and the processing quality and the service life are influenced.

Disclosure of Invention

Aiming at the problem of low lubrication degree of the PCD drill bit, the utility model provides the PCD drill bit, which adopts the following technical scheme:

the utility model provides a PCD drill bit which comprises a cutting part and a handle part, wherein the surface of the cutting part is coated with a ta-C coating, the length of the cutting part is 12 mm-24 mm, and the thickness range of the ta-C coating is 100-300 nm.

Through adopting above-mentioned technical scheme, with ta-C coating on PCD drill bit cutting part surface, utilize the high hardness, the low coefficient of friction's of ta-C coating have performance, reduce PCD drill bit surface's coefficient of friction, increase its lubricity to more effectively remove the chip in the course of processing monocrystalline silicon, improve drilling quality and extension cutter life.

Preferably, the length of the cutting portion is 16mm.

Preferably, the ta-C coating has a thickness value of 200nm. Setting the thickness value of the ta-C coating to 200nm ensures that the ta-C coating covers the PCD drill bit without affecting the normal use of the drill bit.

Preferably, the ta-C coating extends inwardly from the apex of the cutting portion.

By adopting the technical scheme, the working face of the PCD drill bit is ensured to be covered with the ta-C coating.

Preferably, the entire area or a partial area of the cutting portion is coated with a ta-C coating.

Preferably, the cross-sectional area of the shank is greater than the cross-sectional area of the cutting portion.

Preferably, a taper is connected between the shank and the cutting portion.

By adopting the technical scheme, the handle part and the cutting part are connected.

Preferably, the ta-C coating is applied to the cutting portion using an ion sputtering process.

By adopting the technical scheme, the ta-C coating and the PCD drill bit are firmly combined.

According to the PCD drill, the ta-C coating is coated on the surface of the cutting part, and the performance of high hardness and low friction coefficient of the ta-C coating is utilized to reduce the friction coefficient of the surface of the PCD drill and increase the lubricity of the PCD drill, so that chip is removed more effectively in the process of processing monocrystalline silicon, the drilling quality is improved, and the service life of a cutter is prolonged.

Drawings

The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and together with the description serve to explain the principles of the utility model. Many of the intended advantages of other embodiments and embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.

Fig. 1 is a schematic structural view of a PCD drill bit according to an embodiment of the present utility model.

Reference numerals illustrate: 1. PCD drill bit; 2. a handle; 3. a ta-C coating; 4. a cone.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the present utility model are shown in the drawings.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1, the PCD drill disclosed in the embodiment of the present utility model comprises a cutting part 1 and a shank 2, wherein the surface of the cutting part 1 is coated with a ta-C coating 3, the length of the cutting part 1 is 12mm to 24mm, and the thickness of the ta-C coating 3 is 100 to 300nm. Specifically, in the present embodiment, the length of the cutting portion 1 is 16mm and the thickness value of the ta-C coating 3 is 200nm. Setting the thickness value of the ta-C coating 3 to 200nm ensures that the ta-C coating 3 covers the PCD drill bit without affecting the normal use of the drill bit. The PCD drill bit utilizes the properties of high hardness and low friction coefficient of the ta-C coating 3, reduces the friction coefficient of the surface of the PCD drill bit, and increases the lubricity of the PCD drill bit, so that chip is removed more effectively in the process of processing monocrystalline silicon, the drilling quality is improved, and the service life of a cutter is prolonged.

In a specific embodiment, the ta-C coating 3 extends inwardly from the apex of the cutting portion 1, ensuring that the PCD bit face is covered with the ta-C coating 3.

In a specific embodiment, the entire area of the cutting portion 1 is coated with a ta-C coating 3. In other embodiments, the cutting part 1 may also be coated with a ta-C coating 3 in partial areas, depending on the use case.

In a specific embodiment, the cross-sectional area of the shank 2 is larger than the cross-sectional area of the cutting portion 1, and a taper 4 is connected between the shank 2 and the cutting portion 1, engaging the shank 2 and the cutting portion 1.

In a specific embodiment, the ta-C coating 3 is applied to the cutting portion using an ion sputtering process, such that the ta-C coating 3 and the PCD drill bit are firmly bonded. Specifically, the ta-C coating 3 is coated on the cutting part by an ion sputtering process through a graphite target material, so that the ta-C coating 3 and the PCD drill are firmly combined.

The Diamond-like Carbon (DLC) coating is a metastable amorphous substance, and Carbon atoms are mainly combined by sp3 and sp2 hybridization bonds, and has the properties of high hardness, good wear resistance, high elastic modulus and low friction coefficient. Tetrahedral amorphous carbon (ta-C) is one of DLC coatings, with sp3 content typically higher than 70%, with extremely high hardness.

The PCD drill disclosed by the utility model comprises a cutting part 1 and a handle 2, wherein the surface of the cutting part 1 is coated with a ta-C coating 3, the length of the cutting part 1 is 12 mm-24 mm, and the thickness range of the ta-C coating 3 is 100-300 nm. By utilizing the high hardness and low friction coefficient of the ta-C coating 3, the friction coefficient of the PCD drill bit surface is reduced, and the lubricity of the PCD drill bit is increased, so that chip is removed more effectively in the machining process, the drilling quality is improved, and the service life of a cutter is prolonged.

While the utility model has been described with reference to specific embodiments, the scope of the utility model is not limited thereto, and any changes or substitutions can be easily made by those skilled in the art within the scope of the utility model disclosed herein, and are intended to be covered by the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The word 'comprising' does not exclude the presence of elements or steps not listed in a claim. The word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims shall not be construed as limiting the scope.

Claims

1. A PCD drill bit, characterized by: the cutting part comprises a cutting part (1) and a handle part (2), wherein the surface of the cutting part (1) is coated with a ta-C coating (3), the length of the cutting part (1) is 12-24 mm, and the thickness of the ta-C coating (3) is 100-300 nm.

2. A PCD drill bit as claimed in claim 1, wherein: the length of the cutting portion (1) is 16mm.

3. A PCD drill bit as claimed in claim 1, wherein: the thickness value of the ta-C coating (3) is 200nm.

4. A PCD drill bit as claimed in claim 1, wherein: the ta-C coating (3) extends inwardly from the apex of the cutting portion (1).

5. A PCD drill bit as claimed in claim 4, wherein: all or part of the cutting portion (1) is coated with a ta-C coating (3).

6. A PCD drill bit as claimed in claim 1, wherein: the cross-sectional area of the shank (2) is larger than the cross-sectional area of the cutting portion (1).

7. A PCD drill bit as claimed in claim 6, wherein: a cone part (4) is connected between the handle part (2) and the cutting part (1).

8. A PCD drill bit as claimed in claim 1, wherein: the ta-C coating (3) is applied to the cutting part (1) by means of an ion sputtering process.