Composite coating cutter

Abstract

The utility model provides a composite coating cutting tool which comprises a cutting tool body, a plurality of groove textures and a plurality of convex hull textures are arranged on the outer side of the cutting tool body, the plurality of groove textures and the plurality of convex hull textures are arranged on the surface of the cutting tool, and in the specific using process, the surface of the cutting tool is provided with a plurality of groove textures and a plurality of convex hull textures. The groove textures are formed in the surface of the tool body, the grooves are arranged in parallel, micro pits can be filled with a coating material in the deposition process, after a coating is cured, the coating can be fixed to the surface of the tool, the bonding strength between the coating and the tool body is greatly improved, the groove textures can store cutting fluid, and the cutting fluid can be prevented from falling off. In the cutting process, the cutting fluid is slowly released from the micro pits, a lubricating film is formed between the tool and a workpiece, and therefore the friction coefficient is reduced, the tool is protected, and tool abrasion is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and in particular to a composite coated cutting tool. Background Technology

[0002] During metal cutting and forming, the tool and chips are squeezed together, causing intense friction between the tool and workpiece contact surfaces. This generates a large amount of cutting heat, causing the cutting temperature to rise sharply. Under such high temperature and high pressure cutting environment, workpiece material is very likely to adhere to the tool surface, accelerating tool wear, reducing tool life, and affecting the forming quality of the workpiece.

[0003] In existing technologies, the problem of rapid tool wear is usually mitigated by adding coatings to the tool surface. Multilayer coatings are applied to the surface using techniques such as physical vapor deposition or chemical vapor deposition. During use, the coating protects the tool and reduces damage. However, over long-term use, the coating gradually peels off, leading to increased friction on the tool surface and accelerating tool wear. When the coating peels off, the tool damage increases.

[0004] Therefore, it is necessary to provide a new composite coated cutting tool to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a composite coated cutting tool.

[0006] The composite coated cutting tool provided by this utility model includes: a cutting tool body, wherein the outer side of the cutting tool body is provided with multiple groove textures and multiple convex textures, the multiple groove textures are located on the outer side of the cutting tool body, the center of the multiple groove textures is concave downwards, the edges of the multiple groove textures are convex upwards, and the convex parts of the edges of the multiple groove textures are arc-shaped, the center of the multiple convex textures is convex upwards, and the edges of the multiple convex textures are arc-shaped.

[0007] Preferably, the diameter of the plurality of groove textures is 90μm, the depth of the central depression of the plurality of groove textures is 20μm, and the height of the edge protrusion of the plurality of groove textures is 3μm.

[0008] Preferably, the diameter of the plurality of convex hull textures is 100 μm, and the central convex depth of the plurality of convex hull textures is 30 μm.

[0009] Preferably, the spacing between the plurality of groove textures and the plurality of convex hull textures is 250 μm.

[0010] Preferably, the tool body includes a main cutting section and a secondary cutting section, the main cutting section and the secondary cutting section are integrally formed, a plurality of groove textures are located in the main cutting section, and a plurality of convex hull textures are located in the secondary cutting section.

[0011] Preferably, the outer surfaces of the main cutting section and the secondary cutting section are further coated with a wear-resistant coating.

[0012] Preferably, the wear-resistant coating comprises: a base layer, an intermediate layer, and a surface layer. The base layer is located on the surface of the main cutting section and the secondary cutting section. The intermediate layer is located on the surface of the base layer. The surface layer is located on the surface of the intermediate layer. The base layer is used to enhance the bonding strength between the coating and the tool substrate. The intermediate layer is used to improve the wear resistance and high-temperature resistance of the tool. The surface layer is used to reduce friction and tool body wear during the cutting process.

[0013] Compared with related technologies, the composite coated cutting tool provided by this utility model has the following beneficial effects:

[0014] 1. This utility model sets multiple groove textures and multiple convex textures on the surface of the cutting tool. In specific use, the groove texture forms a series of tiny grooves on the surface of the cutting tool body. The grooves are arranged in parallel. During the deposition process, the coating material can fill the micro pits. After the coating is cured, the coating will be fixed on the surface of the cutting tool, which greatly improves the bonding strength between the coating and the cutting tool body. In addition, the groove texture can store cutting fluid. During the cutting process, the cutting fluid is slowly released from the micro pits, forming a lubricating film between the cutting tool and the workpiece, thereby reducing the coefficient of friction, protecting the cutting tool and reducing tool wear.

[0015] 2. Multiple convex textures: During use, convex textures form many tiny protrusions on the tool surface. These convex textures are hemispherical. In terms of coating adhesion, convex textures can increase the mechanical interlocking force between the coating and the tool body surface. When the coating covers the convex textures, it will form a more complex interface structure, improve the adhesion of the coating, further protect the tool body and make the tool body more durable. In addition, convex textures can also cause chips to curl when passing through the tool surface, which is conducive to chip breakage and discharge. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of the composite coated cutting tool provided by this utility model;

[0017] Figure 2 A sectional view of one side of the tool body provided by this utility model;

[0018] Figure 3 A schematic diagram of the specific structure of the groove texture provided by this utility model;

[0019] Figure 4 This is a schematic diagram of the specific structure of the convex hull texture provided by this utility model.

[0020] The labels in the diagram are: 1. Groove texture; 2. Convex hull texture; 3. Main cutting section; 4. Secondary cutting section; 5. Bottom layer; 6. Intermediate layer; 7. Surface layer. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please refer to the following: Figure 1 , Figure 2 , Figure 3 as well as Figure 4 in, Figure 1 A schematic diagram of the overall structure of the composite coated cutting tool provided by this utility model; Figure 2 A sectional view of one side of the tool body provided by this utility model; Figure 3 A schematic diagram of the specific structure of the groove texture provided by this utility model; Figure 4 This is a schematic diagram of the specific structure of the convex hull texture provided by this utility model.

[0023] In the specific implementation process, such as Figure 1-4 As shown, the composite coated cutting tool provided by this utility model includes: a cutting tool body, with multiple groove textures 1 and multiple convex textures 2 on the outer side of the cutting tool body. The multiple groove textures 1 are located on the outer side of the cutting tool body, with the center of the multiple groove textures 1 concave downwards and the edges of the multiple groove textures 1 convex upwards, and the convex parts of the edges of the multiple groove textures 1 are arc-shaped. The center of the multiple convex textures 2 is convex upwards, and the edges of the multiple convex textures 2 are arc-shaped. The diameter of the multiple groove textures 1 is 90μm, the depth of the concavity at the center of the multiple groove textures 1 is 20μm, and the height of the convexity at the edge of the multiple groove textures 1 is 3μm. The diameter of the multiple convex textures 2 is 100μm, the depth of the convexity at the center of the multiple convex textures 2 is 30μm, and the distance between the multiple groove textures 1 and the multiple convex textures 2 is 250μm.

[0024] It should be noted that, in practical use, the aforementioned multiple groove textures 1 not only increase the adhesion between the coating and the tool body, but also store lubricating oil and other liquids to lubricate the tool body and reduce tool wear. In practical use, the aforementioned multiple convex textures 2 can change the contact state between the tool and the workpiece. During the cutting process, the convex textures generate micro-vibrations when they contact the workpiece. These vibrations help break the adhesive wear between the tool body and the workpiece, reducing the coefficient of friction. At the same time, the convex textures can also cause the chips to curl when passing over the tool surface, which is beneficial for chip breakage and discharge, further enhancing the working performance of the tool body and further protecting the tool body.

[0025] The tool body includes a main cutting section 3 and a secondary cutting section 4, which are integrally formed. Multiple groove textures 1 are located in the main cutting section 3, and multiple convex hull textures 2 are located in the secondary cutting section 4.

[0026] The wear-resistant coating includes: a base layer 5, an intermediate layer 6, and a surface layer 7. The base layer 5 is located on the surface of the main cutting section and the secondary cutting section. The intermediate layer 6 is located on the surface of the base layer 5, and the surface layer 7 is located on the surface of the intermediate layer 6. The base layer 5 is used to enhance the bonding strength between the coating and the tool substrate. The intermediate layer 6 is used to improve the wear resistance and high temperature resistance of the tool. The surface layer 7 is used to reduce friction and tool wear during the cutting process.

[0027] It should be noted that the bottom layer 5 is used to enhance the bonding strength between the coating and the tool body. Commonly used materials for the bottom layer 5 include TiN, TiCN, and TiAlN. These materials have good adhesion and wear resistance. The middle layer 6 is mainly used to improve the wear resistance and high temperature resistance of the tool. It is usually formed by alternating deposition of multiple materials, such as a periodic coating of alternating TiAlN and NbN. This structure can significantly improve the hardness and toughness of the coating. The top layer 7 is the outermost layer of the tool, which is in direct contact with the workpiece and chips. It usually has excellent lubricity and anti-adhesion properties to reduce friction and tool wear during the cutting process. Commonly used top layer materials include NbN and CrN.

[0028] The working principle provided by this utility model is as follows: In specific use, when the main cutting section 3 and the secondary cutting section 4 on the tool body come into contact with the object being cut, the main cutting section 3 and the secondary cutting section 4 are first protected by the three coatings. When the main cutting section 3 and the secondary cutting section 4 enter the object being cut, the cutting fluid such as lubricating oil stored in the groove texture 1 protects the main cutting section 3 and the secondary cutting section 4, making the main cutting section 3 and the secondary cutting section 4 more durable. At this time, the convex texture 2 further enhances the protective performance of the main cutting section 3 and the secondary cutting section 4 and improves the cutting quality.

[0029] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A composite coated cutting tool, characterized in that, include: The tool body has multiple groove textures (1) and multiple convex hull textures (2) on its outer side. The multiple groove textures (1) are located on the outer side of the tool body. The center of the multiple groove textures (1) is concave downwards, the edges of the multiple groove textures (1) are convex upwards, and the convex parts of the edges of the multiple groove textures (1) are arc-shaped. The center of the multiple convex hull textures (2) is convex upwards, and the edges of the multiple convex hull textures (2) are arc-shaped.

2. The composite coated cutting tool according to claim 1, characterized in that, The diameter of the multiple groove textures (1) is 90 μm, the depth of the central depression of the multiple groove textures (1) is 20 μm, and the height of the edge protrusion of the multiple groove textures (1) is 3 μm.

3. The composite coated cutting tool according to claim 2, characterized in that, The diameter of the plurality of convex hull textures (2) is 100 μm, and the central convex depth of the plurality of convex hull textures (2) is 30 μm.

4. The composite coated cutting tool according to claim 3, characterized in that, The spacing between the plurality of groove textures (1) and the plurality of convex hull textures (2) is 250 μm.

5. The composite coated cutting tool according to claim 4, characterized in that, The tool body includes a main cutting section (3) and a secondary cutting section (4), the main cutting section (3) and the secondary cutting section (4) are integrally formed, a plurality of groove textures (1) are located in the main cutting section (3), and a plurality of convex hull textures (2) are located in the secondary cutting section (4).

6. The composite coated cutting tool according to claim 5, characterized in that, The outer surfaces of the main cutting section (3) and the secondary cutting section (4) are also coated with a wear-resistant coating.

7. The composite coated cutting tool according to claim 6, characterized in that, The wear-resistant coating includes: a base layer (5), an intermediate layer (6), and a surface layer (7). The base layer (5) is located on the surface of the main cutting section and the secondary cutting section. The intermediate layer (6) is located on the surface of the base layer (5). The surface layer (7) is located on the surface of the intermediate layer (6). The base layer (5) is used to enhance the bonding strength between the coating and the tool substrate. The intermediate layer (6) is used to improve the wear resistance and high temperature resistance of the tool. The surface layer (7) reduces friction and tool wear during the cutting process.

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