WO2020034271A1

WO2020034271A1 - Cutting blade with different coatings on flank face

Info

Publication number: WO2020034271A1
Application number: PCT/CN2018/104113
Authority: WO
Inventors: 李屏; 江爱胜; 王社权; 倪兰
Original assignee: 株洲钻石切削刀具股份有限公司
Priority date: 2018-08-14
Filing date: 2018-09-05
Publication date: 2020-02-20
Also published as: CN109158625A

Abstract

Disclosed is a cutting blade with different coatings on a flank face. The cutting blade is enclosed by an upper surface (1), a lower surface (2), and a lateral surface (3) connecting the upper surface (1) and the lower surface (2); the lateral surface (3) and the upper surface (1) are intersected to form one or more groups of cutting edge units (4); the cutting edge unit (4) comprises a primary cutting edge (41), a secondary cutting edge (42) adjacent to the primary cutting edge (41), and an angular cutting edge (43) arranged between the primary cutting edge (41) and the secondary cutting edge (42); the lateral surface (3) comprises one or more groups of primary flank surfaces (31), secondary flank surfaces (32), and angular flank surfaces (33) corresponding to the primary cutting edge (41), the secondary cutting edge (42) and the angular cutting edge (43), respectively; the primary flank surfaces (31) and the secondary flank surfaces (32) are arranged in an alternate manner with each other; the primary flank surfaces (31) and the secondary flank surfaces (32) have primary rear coatings (311) and secondary rear coatings (321) respectively; and the primary rear coatings (311) and the secondary rear coatings (321) are different in structure and are mutually independent. The cutting blade with different coatings on a flank face has good cutting performance, long service life and high performance cost ratio.

Description

Cutting insert with different coating on flank face

[Technical Field]

The invention relates to the technical field of metal cutting processing, in particular to a cutting insert with different coatings on the flank face.

【Background technique】

In order to ensure cutting performance, cutting inserts are generally used as the substrate for cutting inserts during cutting. However, in the actual machining process, pure carbide is used as the insert material, and the friction force is large during cutting. When cutting, it is easy to produce chipping, which can only be used for processing with low cutting speed and short life.

In the prior art, by coating one or more layers of refractory hard compounds such as carbides, nitrides, and oxides on the surface of cemented carbide, the surface of the cutting insert has higher hardness, wear resistance, and high hardness. The characteristics of heat resistance, low friction coefficient and effective elimination of built-up edge, and allow the cutting insert cutting speed to increase by 20-70%, which can greatly improve the cutting performance and service life of the cutting insert. However, with the rapid development of the metal cutting industry, in order to fully improve the application ability of cutting inserts in certain specific processing, the shape of each cutting edge in the cutting unit is not exactly the same, and the cutting conditions of each cutting edge are also different. The surface layer of the insert adopts the same surface coating structure. Although the production of cutting inserts is simplified, the life of the cutting edges in the cutting unit is not matched. When cutting, the entire side of a cutting edge in the cutting unit will quickly wear and cause the entire Scrap of the cutting insert, the life of the cutting insert is low.

[Summary of the Invention]

The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, and to provide a cutting insert with different coatings on the flank face with good cutting performance, long service life and high cost performance.

To solve the above technical problems, the present invention adopts the following technical solutions:

A cutting insert having different coatings on a flank face, the cutting insert is surrounded by an upper surface, a lower surface, and a side surface connecting the upper surface and the lower surface, and the side surface intersects with the upper surface to form more than one cutting edge Unit, the cutting edge unit includes an adjacent main cutting edge, a secondary cutting edge, and an angle cutting edge located between the main cutting edge and the secondary cutting edge, and the side surface includes one or more groups respectively from the main cutting edge The main flank face, the secondary flank face, and the corner flank face corresponding to the secondary cutting edge and the corner cutting edge, the main flank face and the secondary flank face are arranged alternately, and the main flank face and the secondary flank face Each has a primary rear coating and a secondary rear coating, and the primary rear coating and the secondary rear coating have different structures and are independent of each other.

As a further improvement of the above technical solution:

The primary cutting edge of the cutting edge unit completes cutting in the feed direction and the secondary cutting edge completes cutting in the depth direction. The primary rear coating is provided with a TiAlN coating and the secondary rear coating is provided with Al ₂ O ₃ coatings.

The primary cutting edge of the cutting edge unit completes cutting in the feed direction and the secondary cutting edge completes cutting in the depth direction. The primary rear coating is provided with a TiN coating, and the secondary rear coating is provided with a TiAlN coating. .

The secondary cutting edge of the cutting edge unit completes cutting in the feed direction and the main cutting edge completes cutting in the depth direction. The primary rear coating is provided with an Al ₂ O ₃ coating, and the secondary rear coating is provided with TiAlN coating.

The secondary cutting edge of the cutting edge unit completes cutting in the feed direction and the main cutting edge completes cutting in the depth direction. The primary rear coating is provided with a TiAlN coating, and the secondary rear coating is provided with a TiN coating. .

The corner flank face has a corner back coating, and the corner back coating is the same as the secondary back coating.

The corner flank face has a corner back coating, and the corner back coating is different from the main back coating and the sub back coating.

The corner flank face has a corner back coating, and the corner back coating is formed by the intersection of the main back coating and the sub back coating.

The upper surface has an upper coating layer, the lower surface has an lower coating layer, and the upper coating layer and the lower coating layer have different structures.

The side surface includes a lower side surface that intersects the lower surface, the lower side surface has a lower coating layer, and the lower coating layer is different from the main rear coating layer and the sub rear coating layer.

The primary cutting edge is a continuous cutting edge, and the secondary cutting edge is an intermittent cutting edge.

The upper surface has an upper coating layer, the lower surface has an lower coating layer, the upper surface and the lower surface have the same structure, and the upper coating layer and the lower coating layer have the same structure.

The side surface is symmetrical with respect to a center plane of the upper surface and the lower surface, the side surface intersects with the lower surface to form a lower cutting unit, and the coating of each flank surface of the lower cutting unit corresponding to the side surface The structure is the same as the coating structure of each flank face of the cutting edge unit.

Compared with the prior art, the advantages of the present invention are:

Cutting blades with different coatings on the flank face of the present invention, the main back coating and the sub back coating have different structures and are independent of each other. Therefore, according to different cutting conditions of the main cutting edge and the secondary cutting edge, different hardnesses and resistances are required. The requirements such as abrasiveness, using different primary and secondary coating structures, respectively, while satisfying the different cutting requirements of the primary and secondary cutting edges, make the life of the primary and secondary cutting edges in the cutting edge unit Closer or consistent, that is to optimize and match the performance of the main cutting edge and the secondary cutting edge in the cutting edge unit, to avoid the failure of the entire cutting edge unit due to the wear and damage of some cutting edges in a single cutting edge unit, and to avoid In order to meet the higher hardness, wear resistance and other performance requirements of a certain cutting edge, the high cost caused by using a high-spec coating structure for the coating of the entire flank surface, not only can meet the cutting The performance requirements of the inserts can also extend the service life of the cutting inserts and improve the price / performance ratio of the cutting inserts.

[Brief Description of the Drawings]

FIG. 1 is a perspective view of a first embodiment of a cutting insert with different coatings on the flank face of the present invention.

FIG. 2 is a front view of a first embodiment of a cutting insert with different coatings on the flank face of the present invention.

FIG. 3 is a perspective view of a second embodiment of a cutting insert with different coatings on the flank face of the present invention.

FIG. 4 is a front view of a second embodiment of a cutting insert with different coatings on the flank face of the present invention.

FIG. 5 is a perspective view of a third embodiment of a cutting insert with different coatings on the flank face of the present invention.

FIG. 6 is a front view of a third embodiment of a cutting insert with different coatings on the flank face of the present invention.

Each symbol in the figure indicates:

1. Top surface; 11. Top coating; 2. Bottom surface; 21; Under coating; 3. Side; 31; Main flank; 311; Main flank; 32; Sub flank; 321, Sub After coating; 33, corner flank surface; 331, corner flank coating; 34, underside; 341, underside coating; 4, cutting edge unit; 41, main cutting edge; 42, secondary cutting edge; 43, Angle cutting edge.

【detailed description】

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments of the specification.

Figures 1 and 2 show a first embodiment of a cutting insert with different coatings on the flank face of the present invention. The cutting insert of this embodiment consists of an upper surface 1, a lower surface 2, and a connection between the upper surface 1, and the lower surface 2. The side surface 3 is surrounded, and the side surface 3 intersects the upper surface 1 to form a group of more than one cutting edge unit 4. The cutting edge unit 4 includes an adjacent main cutting edge 41, a secondary cutting edge 42, and the main cutting edge 41 and the secondary cutting edge 42. The corner cutting edges 43 and the side 3 include a set of more than one main flank 31, a sub flank 32, and a corner flank 33 corresponding to the main cutting edge 41, the secondary cutting edge 42, and the corner cutting edge 43, respectively. The main flank face 31 and the secondary flank face 32 are arranged alternately, and the main flank face 31 and the secondary flank face 32 respectively have a main back coating 311 and a sub back coating 321, and the main back coating 311 and the sub back coating 321 has different structures and is independent of each other. Therefore, according to the different hardness and wear resistance requirements of the main cutting edge 41 and the secondary cutting edge 42 for different cutting conditions, different primary and

secondary coatings

311 and 321 are used. Structure, while satisfying the different cutting requirements of the main cutting edge 41 and the secondary cutting edge 42, the cutting edge is singled The life of the main cutting edge 41 and the auxiliary cutting edge 42 in 4 is closer or consistent, that is, the optimization and matching of the performance of the main cutting edge 41 and the auxiliary cutting edge 42 in the cutting edge unit 4 are achieved, so as to avoid a single cutting edge unit 4 Part of the cutting edge is worn and damaged, which causes the entire cutting edge unit 4 to fail. It also avoids coating the entire flank surface in order to meet the higher hardness and wear resistance of the main cutting edge 41 or the secondary cutting edge 42. At the same time, the high cost caused by the use of a high-spec coating structure not only meets the performance requirements of the cutting inserts, but also extends the service life of the cutting inserts and improves the cost-effectiveness of the cutting inserts.

In this embodiment, the main cutting edge 41 of the cutting edge unit 4 finishes cutting in the feed direction and the sub cutting edge 42 finishes cutting in the depth direction. The TiAlN coating is provided on the main rear coating 311, which has a high surface hardness. Can effectively improve the high-temperature machining life and high-speed machining performance of the main cutting edge 41; and the secondary rear coating 321 is provided with an Al ₂ O ₃ coating, which can effectively improve the toughness of the secondary cutting edge 42 and prevent the secondary cutting edge 42 from occurring. lack.

In addition to the above embodiments, a TiN coating is provided on the main rear coating 311, and a TiAlN coating may be provided on the secondary rear coating 321.

In this embodiment, the corner flank face 33 has a corner back coating 331, which is the same as the secondary back coating 321, that is, the corner back coating 331 is an Al ₂ O ₃ coating, and the corner back coating 331 is The same coating layer as the secondary rear coating layer 321 can simplify the machining process of the cutting insert, reduce the processing cost, and further improve the price / performance ratio of the cutting insert.

In this embodiment, the upper surface 1 has an upper coating layer 11 and the lower surface 2 has an lower coating layer 21. The upper coating layer 11 and the lower coating layer 21 have different structures. In this embodiment, the upper coating layer 11 of the upper surface 1 needs to have High cutting performance, but the lower surface 2 and the side 3 do not need to form cutting edges. The lower surface 2 is mainly used for installation and positioning. The performance requirements of the undercoat layer 21 are relatively low. The structure is different. The upper coating layer 11 is provided with a TiAlN coating, and the lower coating layer 21 can be a general performance coating, which can meet the different performance requirements of the upper surface 1 and the lower surface 2, and further reduce the processing cost of the cutting insert.

FIG. 3 and FIG. 4 show a second embodiment of a cutting insert with a different coating on the flank of the present invention. The structure of the first embodiment of the cutting insert of this embodiment is basically the same, and the difference is only that: In the example, the secondary cutting edge 42 of the cutting edge unit 4 completes cutting in the feed direction and the main cutting edge 41 completes cutting in the depth direction. The main rear coating 311 is provided with a TiAlN coating, which has a high surface hardness and can The high-temperature machining life and high-speed machining performance of the main cutting edge 41 are effectively improved, and the TiN coating is provided on the secondary rear coating layer 321 to improve the hardness and wear resistance of the secondary cutting edge 42.

In addition to the above embodiments, an Al ₂ O ₃ coating is provided on the main rear coating 311, and a TiAlN coating may be provided on the secondary rear coating 321.

The corner back coating 331 is different from the main back coating 311 and the sub back coating 321. When the cutting insert participates in cutting, the cutting conditions of the corner cutting edge 43 are usually different from those of the main cutting edge 41 and the sub cutting edge 42. Therefore, the corner back coating 331 is different from the main back coating 311 and the sub back coating 321, which can make the cutting performance and life of the corner cutting edge 43 closer to the main cutting edge 41 and the sub cutting edge 42. This embodiment The middle and rear corner coatings 331 are provided with a CrN coating.

FIG. 5 and FIG. 6 show a third embodiment of a cutting insert with different coatings on the flank face of the present invention. The difference between the first embodiment of the cutting insert of this embodiment is mainly due to:

In this embodiment, the main cutting edge 41 is a continuous cutting edge, and the sub cutting edge 42 is an intermittent cutting edge. When the cutting insert is mounted on a cutting tool and used, the main cutting edge 41 and the sub cutting edge 42 are alternately fed as a side. The main cutting edge is applied in the direction. This application can improve the cutting efficiency and chip removal ability in the side feed direction. When the main cutting edge 41 completes the main cutting in the side feed direction, the continuous cutting edge will have a large width and a different thickness. Chips, so the main cutting edge 41 is required to have good strength. When the secondary cutting edge 42 completes the main cutting in the side feed direction, the intermittent cutting edge will produce chips with small cutting width and the same thickness. Therefore, the secondary cutting edge 42 is required to have Very good impact resistance, that is, improving the overall cutting performance of the cutting insert, and the cutting insert base in this embodiment needs to use a one-time molding process such as pressing. The strength and wear resistance of the insert base are basically the same. Therefore, the main back coating layer 311 and the sub back coating layer 321 have different structures and are independent of each other. While satisfying the different cutting requirements of the main cutting edge 41 and the sub cutting edge 42, the cutting edges are singled. The life of the main cutting edge 41 and the auxiliary cutting edge 42 in 4 is closer or consistent, that is, the performance of the main cutting edge 41 and the auxiliary cutting edge 42 in the cutting edge unit 4 are optimized and matched. In this embodiment, the main rear coating A TiN coating is provided on the layer 311. The TiN coating has a higher hardness and a higher oxidation temperature, which improves the hardness and wear resistance of the main cutting edge 41, while a TiAlN coating is provided on the secondary rear coating 321. The higher surface hardness can effectively improve the high-temperature machining life and high-speed machining performance of the secondary cutting edge 42.

In this embodiment, the corner flank face 33 has a corner back coating 331, which is formed by the intersection of the main back coating 311 and the sub back coating 321, which simplifies the processing difficulty of the cutting insert, except for the structure of this embodiment. In addition, the corner back coating layer 331 can be selected to have the same structure as the main back coating layer 311 or the same structure as the sub back coating layer 321 according to the cutting condition requirements of the corner cutting edge 43.

In this embodiment, the side surface 3 includes a lower side surface 34 that intersects the lower surface 2. The lower side surface 34 has a lower coating layer 341. The lower coating layer 341 is different from the main rear coating layer 311 and the sub rear coating layer 321. In the embodiment, the lower side 34 is mainly used for installation and positioning, and does not greatly affect the performance of the cutting insert. The lower side 34 may be coated with a general performance, which further improves the cost performance of the cutting insert.

In addition to the above embodiments, in order to increase the number of cutting edges of the cutting insert, the upper surface 1 has an upper coating layer 11, the lower surface 2 has an undercoat layer 21, and the upper surface 1 and the lower surface 2 have the same structure. The upper coating layer 11 and the lower coating layer 21 has the same structure, and the side surface 3 is symmetrical about the center surfaces of the upper surface 1 and the lower surface 2. The side surface 3 and the lower surface 2 intersect to form a lower cutting unit. The coating structure of each flank surface of the lower cutting unit on the side surface 3 is the same as The coating structure of each flank face of the cutting edge unit 4 is the same, that is, the cutting insert has a plurality of vertically symmetric cutting units, and the upper coating layer 11 and the lower coating layer 21 have the same structure. The coating structure of the cutting surface is the same as the coating structure of each flank surface of the cutting edge unit 4, and both need to have good cutting performance, thereby maximizing the number of cutting edges of the cutting insert and improving the use of the cutting insert. rate.

Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention or modify it into an equivalent implementation of equivalent changes without departing from the scope of the technical solution of the present invention. example. Therefore, any simple modification, equivalent change, and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

A cutting insert with different coatings on the flank face, the cutting insert is surrounded by an upper surface (1), a lower surface (2), and a side surface (3) connecting the upper surface (1) and the lower surface (2), The side surface (3) intersects the upper surface (1) to form a group of more than one cutting edge unit (4), and the cutting edge unit (4) includes adjacent main cutting edges (41) and auxiliary cutting edges (42) ) And an angular cutting edge (43) located between the main cutting edge (41) and the auxiliary cutting edge (42), the side surface (3) includes one or more groups respectively with the main cutting edge (41) and the auxiliary cutting edge The main flank face (31), the secondary flank face (32), and the corner flank face (33) corresponding to the cutting edge (42) and the corner cutting edge (43). The blade faces (32) are arranged alternately, and are characterized in that the main flank face (31) and the secondary flank face (32) have a primary flank coating (311) and a secondary flank coating (321), respectively. The rear coating (311) and the secondary rear coating (321) have different structures and are independent of each other.
The cutting insert with different coatings on the flank face according to claim 1, characterized in that the main cutting edge (41) of the cutting edge unit (4) completes cutting in the feed direction and the auxiliary cutting edge (42) In the cutting direction, TiAlN coating is provided on the main back coating (311), and Al 2 O 3 coating is provided on the sub back coating (321).
The cutting insert with different coatings on the flank face according to claim 1, characterized in that the main cutting edge (41) of the cutting edge unit (4) completes cutting in the feed direction and the auxiliary cutting edge (42) In the cutting direction, TiN coating is provided on the main back coating (311), and TiAlN coating is provided on the sub back coating (321).
The cutting insert with different coatings on the flank face according to claim 1, characterized in that the secondary cutting edge (42) of the cutting edge unit (4) completes cutting in the feed direction and the main cutting edge (41) The cutting in the depth direction is completed. The primary rear coating (311) is provided with an Al 2 O 3 coating, and the secondary rear coating (321) is provided with a TiAlN coating.
The cutting insert with different coatings on the flank face according to claim 1, characterized in that the secondary cutting edge (42) of the cutting edge unit (4) completes cutting in the feed direction and the main cutting edge (41) In the cutting direction, TiAlN coating is provided on the main back coating (311), and TiN coating is provided on the sub back coating (321).
The cutting insert with different coatings on the flank face according to any one of claims 1 to 5, characterized in that the corner flank face (33) has a corner flank coating (331), and the corner flank The coating (331) is the same as the secondary post-coating (321).
The cutting insert with different coatings on the flank face according to any one of claims 1 to 5, characterized in that the corner flank face (33) has a corner flank coating (331), and the corner flank The coating (331) is different from the main back coating (311) and the sub back coating (321).
The cutting insert with different coatings on the flank face according to any one of claims 1 to 5, characterized in that the corner flank face (33) has a corner flank coating (331), and the corner flank The coating layer (331) is formed by the intersection of the primary rear coating layer (311) and the secondary rear coating layer (321).
The cutting insert with different coatings on the flank face according to any one of claims 1 to 5, characterized in that the upper surface (1) has an upper coating layer (11) and the lower surface (2) It has an undercoat layer (21), which has a different structure from the undercoat layer (21).
The cutting insert with different coatings on the flank face according to claim 9, characterized in that the side surface (3) comprises a lower side surface (34) which intersects the lower surface (2), and the lower side surface (34) 34) It has a lower coating layer (341), and the lower coating layer (341) is different from the main rear coating layer (311) and the secondary rear coating layer (321).
The cutting insert with different coatings on the flank face according to claim 10, wherein the main cutting edge (41) is a continuous cutting edge, and the auxiliary cutting edge (42) is an intermittent cutting edge.
The cutting insert with different coatings on the flank face according to any one of claims 1 to 5, characterized in that the upper surface (1) has an upper coating layer (11) and the lower surface (2) There is a lower coating layer (21), the upper surface (1) and the lower surface (2) have the same structure, and the upper coating layer (11) and the lower coating layer (21) have the same structure.
The cutting insert with different coatings on the flank face according to claim 12, characterized in that the side surface (3) is symmetrical with respect to the center plane of the upper surface (1) and the lower surface (2), and The side surface (3) intersects with the lower surface (2) to form a lower cutting unit, and the coating structure of each flank surface of the lower cutting unit on the side surface (3) and the cutting edge unit (4) The coating structure of each flank face is the same.