Cutter

Abstract

The utility model provides a cutter. The cutter comprises a cutter base body and a cutting edge part, one side of the cutter base body in the height direction is a connecting end face with a convex part and / or a concave part, and the cutting edge part is of a stacked structure and is connected to the connecting end face. According to the cutter provided by the embodiment of the invention, the connecting end of the cutter base body and the cutting edge part is the connecting end face with the convex part and / or the concave part, and compared with a plane butt joint mode of the cutter base body and the cutting edge part, the connecting end face has a relatively enlarged combination surface and can be more firmly combined with the cutting edge part, so that the risk of collapse of the combination part in use is effectively reduced; and the service life of the cutter can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen cutlery technical field, concretely relates to a kitchen cutlery. BACKGROUND

[0002] Cutlery plays a very important role in daily kitchen utensils. In the prior art, although the integral forging process can be used to cast an integrally formed blade body and edge portion, in order to meet the high requirements of people on the durability and sharpness of the cutlery, the blade body and the edge portion are sometimes arranged in a split structure. However, this will face a challenge: in order to balance the convenience of manufacturing, the sharpness of the blade edge and the smoothness of cutting, the blade body is often designed to be thin and long, and the outer surface needs to be smoothly transitioned in the area combined with the edge portion. Since the blade body is relatively thin in the thickness direction, there are relatively few connecting points, so the cutlery with the blade body and the edge portion arranged in a split structure is prone to collapse of the blade body and the edge portion during use, thereby shortening the service life of the cutlery. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a cutlery to solve the problem that the cutlery with the blade body and the edge portion arranged in a split structure in the prior art is prone to collapse of the blade body and the edge portion during use, thereby shortening the service life of the cutlery.

[0004] According to a first aspect of the present application, a cutlery is provided, which comprises a cutlery base body and an edge portion, one side of the height direction of the cutlery base body is a connecting end face with a convex part and / or a concave part, and the edge portion has a laminated structure and is connected to the connecting end face.

[0005] According to the cutlery provided by the embodiments of the present application, the connecting end of the cutlery base body and the edge portion is a connecting end face with a convex part and / or a concave part, which has a relatively larger combined surface compared with the flat surface connection mode, can be more firmly combined with the edge portion, thereby effectively reducing the risk of collapse at the combined part during use, and further ensuring the service life of the cutlery.

[0006] In some embodiments, the convex part and / or the concave part are arranged at least along the thickness direction of the cutlery. In this way, the combined area in the thickness direction can be relatively more significantly increased. Moreover, in this case, the connection between the edge portion of the cutlery and the cutlery base body can be improved in the thickness direction through physical locking (such as mutual engagement of the concave and convex parts), so that the connection in the thickness direction is more reliable, and the possibility of collapse of the cutlery in the thickness direction is reduced.

[0007] In some embodiments, the layer stack is stacked along the height direction of the cutting tool, and the hardness is alternately distributed to form at least the tip portion of the cutting edge, so that the hardness of the tip portion is alternately distributed along the height direction of the cutting tool, and the tip portion with alternately distributed hardness can have certain hardness and flexibility, so that the cutting tool can reduce the brittleness of the tip portion without excessively reducing the cutting performance of the tip portion, avoid chipping during cutting, and thus further prolong the service life of the cutting tool.

[0008] In some embodiments, each layer of the layer stack extends in the form of the concave-convex of the connecting end face.

[0009] In these embodiments, each sub-layer of the layer stack is generally formed in a shape corresponding to the concave-convex shape of the connecting end face, and is stacked layer by layer, so that adjacent sub-layers can have more connecting points in the thickness direction, and the bonding force between the sub-layers in the layer stack is enhanced, thereby reducing the risk of layer collapse.

[0010] In some embodiments, the layer stack includes alternately arranged hard layers and tough layers, and one layer of the layer stack connected with the connecting end face is a tough layer, so that the bonding force between the layer stack and the cutting tool substrate can be further enhanced to avoid separation or falling off during cutting. The outermost layer of the cutting edge is a hard layer, so that the tip portion of the cutting edge of the cutting tool has high hardness and wear resistance, thereby improving the persistent sharpness of the cutting tool.

[0011] In some embodiments, the hardness of the hard layer is greater than the hardness of the tough layer, so that the tough layer and the hard layer can form a cutting edge with appropriate hardness to avoid chipping of the tip of the cutting tool due to excessive hardening during cutting, thereby ensuring the persistent sharpness of the cutting tool. And / or, the average thickness of the tough layer is less than the average thickness of the hard layer. In this way, the hard layer can occupy the main part of the cutting edge, thereby providing sufficient hardness and wear resistance to cope with wear and impact during cutting. The thin tough layer can reduce the impact on the overall thickness and sharpness of the cutting edge while ensuring the connection strength and toughness, thereby prolonging the persistent sharpness life of the cutting tool.

[0012] In some embodiments, the hard layer is formed of tungsten alloy, nickel alloy, chromium alloy, titanium alloy, high carbon steel or stainless steel. The above materials have high hardness and melting point, good corrosion resistance, and can be used as materials for forming the cutting edge of the cutting tool. And / or, the tough layer is formed of nickel alloy, chromium alloy or cobalt alloy. The above materials have low hardness, melting point and good toughness, and can be used as materials for forming the cutting edge of the cutting tool, and can cooperate with the material of the hard layer to form a cutting edge with appropriate hardness.

[0013] In some embodiments, the average thickness of the hard layer is 100-300 microns; and / or, the average thickness of the tough layer is 50-200 microns. In this way, the layered structure has a hard layer and a tough layer with certain thicknesses, which can ensure the hardness and wear resistance required for cutting on the one hand, while maintaining a certain toughness to absorb the impact and vibration during cutting on the other hand, thereby avoiding the problem of blade collapse of the cutting tool.

[0014] In some embodiments, the hardness of the hard layer is 50-65 HRC; and / or, the hardness of the tough layer is 20-40 HRC. In this way, the hard layer has sufficient hardness and wear resistance to resist wear and impact during cutting. The tough layer has sufficient toughness to absorb the impact and vibration during cutting, and the tough layer and the hard layer within this hardness range can be combined to form a layered structure with appropriate hardness to form the blade portion of the cutting tool, thereby ensuring the sharpness of the cutting tool.

[0015] In some embodiments, the number of layers of the layered structure is 4-10, which can at least constitute the blade tip portion of the blade portion of the cutting tool or constitute the entire blade portion under the expected thickness requirement. And / or, the layered structure includes a laser cladding layer, a plasma layer, an electric arc spraying layer or a flame spraying layer. The layered structure can be formed by various coating methods, which can be selected based on the demand, thereby simplifying the manufacturing process of the cutting tool.

[0016] In some embodiments, the adjacent hard layer and tough layer are embedded with each other at the connecting interface, which can enhance the bonding strength between the sub-layers of the layered structure, reduce the risk of tool failure due to interlayer peeling, make the cutting tool more reliable during cutting, thereby prolonging the service life of the cutting tool. And / or, the blade tip portion of the cutting tool is a mixed layer of the hard layer and the tough layer. In this way, the blade tip portion of the cutting tool can have high hardness and wear resistance of the hard layer, as well as toughness and impact resistance of the tough layer, thereby exhibiting excellent cutting performance and durability when the cutting tool is used.

[0017] In some embodiments, the connecting end face includes a plurality of protrusions and grooves between adjacent protrusions; or, the connecting end face includes a plurality of grooves and protrusions between adjacent grooves.

[0018] In these embodiments, the connecting end face with protrusions and grooves can form a relatively larger bonding surface, thereby being firmly bonded with the blade portion and reducing the possibility of collapse.

[0019] In some embodiments, the protrusions are at least one of annular, columnar and conical; and / or, the recesses are at least one of annular, columnar and conical. In this way, the shapes of the concave-convex structures are diversified, and certain aesthetics can be considered while ensuring that the concave-convex structures can be enclosed.

[0020] In some embodiments, the protrusions are convex arcs with a radius R1, where 0.05 mm≤R1≤0.6 mm; and the recesses are concave arcs with a radius R2, where 0.05 mm≤R2≤0.6 mm.

[0021] In these embodiments, the connecting end surfaces of the concave arcs or convex arcs with predetermined arc radii can have sufficient bonding surfaces, so as to be firmly bonded with the blade edge portion and reduce the possibility of chipping.

[0022] In some embodiments, the toughness layer has a roughness of 10-25 microns, so as to be more easily embedded in the adjacent hard layer in the subsequent heat treatment stage, better improve the toughness of the blade edge portion, thereby avoiding chipping of the blade edge portion, and avoiding that the toughness layer is too thick to affect the sharpness of the tool after later polishing. The hard layer has a roughness of 5-10 microns, so as to form a good bond with the toughness layer, and in the case that the outermost layer of the blade edge portion is the hard layer, the hard layer with the roughness as the blade tip can have certain serrated edges, so as to improve the sharpness.

[0023] In some embodiments, the outer edge of the blade edge portion forms a blade edge of the tool, and the blade edge has a micro-serration structure distributed along the length direction of the tool.

[0024] In these embodiments, the blade edge with the micro-serration structure distributed along the length direction of the tool can be more easily cut into food materials in the cutting process, and has smaller cutting resistance, so as to improve the cutting speed and efficiency of the tool. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and other objects and features of the present application will become more apparent from the following description of embodiments taken in conjunction with the accompanying drawings, in which:

[0026] Figure 1 is a schematic view of a three-dimensional structure of a tool according to an embodiment of the present application;

[0027] Figure 2 is Figure 1 is a schematic view of a cross-sectional structure at A-A in FIG. 1;

[0028] Figure 3 is a schematic view of a three-dimensional structure of a tool according to an embodiment of the present application;

[0029] Figure 4 is Figure 3 a cross-sectional structural schematic view at B-B in FIG. 1;

[0030] Figures 5 to 7 respectively show structural schematic views of various tool substrates that are embodiments of the present application;

[0031] Figure 8 and Figure 9 respectively show bottom structural schematic views of portions of concave-convex structures that are embodiments of the present application.

[0032] Symbol explanation

[0033] 10, tool substrate; 11, connecting end surface; 111, protrusion; 112, groove; 20, edge portion;

[0034] 21, hard layer; 22, ductile layer; 23, edge. DETAILED DESCRIPTION

[0035] The following detailed description is presented to aid in understanding the method, apparatus and / or system described herein. It is not intended to limit the method, apparatus and / or system described herein to the exact construction described. Various changes, modifications and equivalents can be resorted to without departing from the disclosure of the present application. For example, the order of the operations described herein can be changed, and various elements can be added, omitted, or combined, as will be apparent to one of ordinary skill in the art in light of the disclosure of the present application. Furthermore, features known to those in the art can be omitted for the sake of clarity and brevity.

[0036] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided so that the disclosure of the method, apparatus and / or system described herein can be fully understood. With full understanding of the disclosure of the present application, many changes, modifications, and equivalents will be apparent.

[0037] As used herein, the term "and / or" includes any one of the associated listed items, as well as any combination of any two or more of the associated listed items.

[0038] Although terms such as "first", "second", and "third" can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. Instead, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, terms of a first element, a first component, a first region, a first layer, or a first section described in the examples described herein could also be termed a second element, a second component, a second region, a second layer, or a second section without departing from the teachings of the examples.

[0039] In the description, when an element such as a layer, a region, or a substrate is described as "on", "connected to", or "coupled to" another element, the element can be directly on, directly connected to, or directly coupled to the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is described as being "directly on", "directly connected to", or "directly coupled to" another element, no other element is interposed therebetween.

[0040] The terms used herein are only used to describe various examples and not to limit the disclosure. The singular form also intends to include the plural form unless the context clearly indicates otherwise. The terms "comprise", "include" and "have" indicate the presence of the stated feature, number, operation, component, element, and / or combination thereof, but do not exclude the presence or addition of one or more other features, numbers, operations, components, elements, and / or combinations thereof. The term "a plurality of" represents any number of two or more.

[0041] The orientation terms "upper", "lower", "top", and "bottom" and the like in the present application are defined based on the orientation of the tool in the normal use state.

[0042] Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs after the application is understood. Unless explicitly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as their meanings in the context of the relevant art and the present application, and should not be interpreted ideally or too formally.

[0043] In addition, in the description of the examples, when it is considered that a detailed description of the related structure or function known to be confusing to the present application will be caused, such a detailed description will be omitted.

[0044] The inventive concept of the present application will be described in detail below with reference to exemplary embodiments.

[0045] According to a first aspect of the present application, a knife, in particular a kitchen knife, is provided. As shown in Figures 1 to 4 The knife comprises a knife base body 10 and a blade edge portion 20, wherein one side of the height direction of the knife base body 10 is a connecting end surface 11 with a convex portion and / or a concave portion, and the blade edge portion 20 has a laminated structure and is connected to the connecting end surface 11.

[0046] According to the knife provided by the embodiments of the present application, the connecting end of the knife base body 10 and the blade edge portion 20 is the connecting end surface 11 with the convex portion and / or the concave portion, which has a relatively larger bonding surface compared with the flat surface connection mode, can be more firmly bonded with the blade edge portion 20, thereby effectively reducing the risk of falling off at the bonding position in use, and further ensuring the service life of the knife.

[0047] In the embodiments of the present application, the knife base body 10 is the main part of the knife, which can also be referred to as "knife body". The knife base body 10 has two opposite end portions, one of which forms the back of the knife, and the other of which has the connecting end surface 11 with the convex portion and / or the concave portion, and the blade edge portion 20 is connected to the connecting end surface 11, specifically, is formed on the connecting end surface by spraying, and is bonded with the knife base body 10 in a non-planar form, thereby being able to play a good bonding effect due to the relatively large bonding surface.

[0048] According to the present application, the convex portion and / or the concave portion are arranged at least in the thickness direction of the knife. As an example, the convex portion (protruding portion) and / or the concave portion (recessed portion) are arranged in the length direction and / or the thickness direction of the knife, in other words, the convex portion and / or the concave portion are arranged or designed in the thickness direction of the knife (i.e. the direction of the knife from the blade edge to the handle, or the direction perpendicular to the working surface of the knife).

[0049] As an example, as shown in Figure 1 and Figure 2 In the thickness direction of the knife, the convex portion and the concave portion extend from the first surface to the second surface in the thickness direction of the blade edge portion 20, so that the bonding area in the thickness direction can be increased, and the bonding force with the laminated structure of the blade edge portion 20 can be ensured.

[0050] As another example, as shown in Figure 3 and Figure 4 In the length direction of the knife, the convex portion and the concave portion extend from the first end to the second end in the length direction of the blade edge portion 20, so that the bonding area in the length direction can be increased, and the bonding force with the laminated structure of the blade edge portion 20 can be ensured.

[0051] In the preferred embodiments, the convex portion and the concave portion respectively extend along the thickness direction of the tool, so that the bonding area in the thickness direction can be relatively more significantly increased. In this case, the connection between the cutting edge portion 20 and the tool base 10 can be improved in the thickness direction by physical locking (e.g., the convex portion and the concave portion are engaged with each other), so that the connection in the thickness direction is more reliable, and the tool is less likely to collapse in the thickness direction.

[0052] In the embodiments of the present application, the connection end surface 11 with the convex portion and / or the concave portion described above can include the connection end surface 11 with the convex portion and the concave portion, the connection end surface 11 with the convex portion, and the connection end surface 11 with the concave portion.

[0053] According to some embodiments of the present application, in the case where the connection end surface 11 has the convex portion and the convex portion, the connection end surface 11 can be a connection end surface 11 with a convex-concave structure. Here, the convex-concave structure is a structure with protrusions and grooves, which can be regular, irregular, continuous, intermittent, etc.

[0054] As shown in FIGS. 1 and 2, the connection end surface 11 of the tool base 10 has a convex portion and / or a concave portion. Figure 8 and Figure 9 respectively show the bottom view of the convex-concave structure according to the embodiments of the present application. As shown in Figure 8 and Figure 9 , the convex-concave structure includes a plurality of protrusions 111 and grooves 112 between adjacent protrusions 111, or a plurality of grooves 112 and protrusions 111 between adjacent grooves 112. It should be noted that the protrusions 111 here can be protruding ribs or protruding points, and the specific form can be regular or irregular.

[0055] In these embodiments, the connection end surface 11 with the protrusions 111 and the grooves 112 can form a relatively larger bonding surface, so that the bonding of the cutting edge portion and the tool base is better.

[0056] Specifically, the protrusions 111 are at least one of ring-shaped, columnar, and conical, and / or the grooves 112 are at least one of ring-shaped, columnar, and conical, so that the shape of the convex-concave structure is diversified, and the appearance is considered to a certain extent while ensuring that the convex-concave structure can be enclosed.

[0057] Continuing the above example, a plurality of protrusions are distributed on the tool base 10 at a predetermined interval, and as an example, adjacent protrusions 111 are connected to form a mesh structure, so that the connection end surface 11 with the convex-concave structure is formed, thereby laying a foundation for enhancing the bonding force with the cutting edge portion 20, and to a certain extent, the manufacturing process of the tool can be simplified due to the simple design of the convex-concave structure and the ease of forming.

[0058] In some embodiments, the height of the protrusion 111 is 50 micrometers - 200 micrometers; and / or the width of the protrusion 111 is 100 micrometers - 600 micrometers.

[0059] In some embodiments, the depth of the groove 112 is 50 micrometers - 200 micrometers; and / or the width of the groove 112 is 100 micrometers - 600 micrometers.

[0060] Figure 5 An exemplary structural diagram of a tool base is shown. As shown, (a), (b), and (c) can all generally be seen to have a connecting end face with a concave-convex structure arranged in the thickness direction of the tool. It should be noted that the present application is not limited thereto, and one skilled in the art can deform other types of connecting end faces under the teachings of the present application. Figure 5 According to further embodiments of the present application, the connecting end face 11 can be a connecting end face with a convex arc shape, or a connecting end face with a prismatic shape. As an example, the convex portion is a convex arc shape with a radius R1, where 0.05 millimeters ≤ R1 ≤ 0.6 millimeters.

[0061]

[0062] An exemplary structural diagram of another tool base 10 is shown. As shown, (a) and (b) can both generally be seen to have a connecting end face with a convex portion arranged in the thickness direction of the tool. It should be noted that the present application is not limited thereto, and one skilled in the art can deform other types of connecting end faces under the teachings of the present application. Figure 6 Figure 6 According to yet further embodiments of the present application, the connecting end face 11 can be a connecting end face with a concave arc shape, or a connecting end face with a tapered groove. As an example, the concave portion is a concave arc shape with a radius R2, where 0.05 millimeters ≤ R2 ≤ 0.6 millimeters.

[0063] An exemplary structural diagram of a tool base 10 is shown. As shown, (a) and (b) can both generally be seen to have a connecting end face with a concave portion arranged in the thickness direction of the tool. It should be noted that the present application is not limited thereto, and one skilled in the art can deform other types of connecting end faces under the teachings of the present application.

[0064] Figure 7 In these embodiments, the connecting end face with a concave arc shape or a convex arc shape with a predetermined arc radius can have sufficient bonding surfaces, thereby being able to firmly bond with the blade portion and reduce the possibility of chipping. Figure 7

[0065] In these embodiments, the connecting end face with a concave arc shape or a convex arc shape with a predetermined arc radius can have sufficient bonding surfaces, thereby being able to firmly bond with the blade portion and reduce the possibility of chipping.

[0066] ​​According to the present application, the connecting end face 11 can be formed integrally with the tool base body 10, and in a corresponding method for manufacturing the cookware, the structure of the connecting end face integrated with the tool base body 10 having the recess and / or the protrusion can be manufactured by using the existing process, so that the connecting end face and the tool base body 10 are tightly connected and are not easy to fall off. As an example, the connecting end face integrated with the tool base body 10 can be formed on the original base material by machining, forming, or the like, and the manufacturing process of the cookware is simple and suitable for mass production. In addition, it should be noted that the present application does not limit the connecting end face and the tool base body 10 to be an integrated structure, and those skilled in the art can form the connecting end face by means of a pre-set mold under the teaching of the present application, and then connect it with the tool base body 10 by a suitable method (for example, mortise and tenon connection), so that more types of connecting end faces can be provided and the manufacturing of the connecting end face will not damage the base body itself.

[0067] In some embodiments, the connecting end face 11 is at least recessed and / or protruded towards the height direction of the tool. By recessing and / or protruding the connecting end face 11 towards the height direction of the tool, the surface area of the connecting end face in the thickness direction of the tool base body 10 can be increased, and the connection reliability of the connecting end face in the thickness direction is also improved by physical locking (such as the recess and the protrusion engaging with each other), so that the connection in the thickness direction is more reliable, the tool is less likely to collapse or break in the thickness direction, and the service life of the tool is improved. Here, the connecting end face 11 is at least recessed and / or protruded towards the height direction of the tool, and it can be understood that the connecting end face 11 can be recessed and / or protruded towards the height direction of the tool, or can be recessed and / or protruded in other directions except the thickness direction, which is not specially limited in the present application.

[0068] According to the present application, the blade portion 20 having the laminated structure is connected to the connecting end face 11 to at least form the blade portion 20 of the tool having the hardness alternating distribution, wherein the blade portion 20 is the main part of the tool for cutting.

[0069] According to the present application, the lamination direction of the laminated structure is not fixed, but can be flexibly adjusted according to actual needs. As an example, the laminated structure is laminated along the height direction of the tool, and the hardness is alternatingly distributed to at least form the blade tip portion of the blade portion 20 of the tool, so that the hardness of the blade tip portion is alternatingly distributed, and the blade tip portion having the hardness alternating distribution can have a certain hardness and flexibility, so that the tool can reduce the brittleness of the blade tip portion without excessively reducing the cutting performance of the blade tip portion, and avoid chipping during cutting, thereby further prolonging the service life of the tool.

[0070] In the embodiments of the present application, the blade tip portion is a partial area on the tool adjacent to the blade edge 23, including the blade edge 23.

[0071] It should be noted that in the case that the colors of the layers of the layered structure are inconsistent and the layered structure is arranged in the height direction of the tool, the outer surfaces on both sides of the layered structure are more orderly, and the appearance of the tool can be improved while ensuring the sharpness of the tool.

[0072] In some embodiments, the layered structure is arranged by a plurality of layered units, and the layered unit includes a hard layer 21 and a tough layer 22, and the hard layer 21 and the tough layer 22 are arranged adjacently, wherein the hard layer 21 can provide the hardness and wear resistance required for cutting for the layered structure, and the tough layer 22 (transition layer) can provide a certain toughness and buffering effect, and at the same time, it plays a role in connecting the hard layer 21 and the tool base body 10. In addition, the arrangement of the tough layer 22 helps to reduce the stress concentration between the hard layer and the tool base body 10, thereby improving the durability of the tool.

[0073] In some embodiments, the tough layer 22 in the uppermost layered unit is connected with the tool base body 10, in other words, the layered structure is directly connected with the tough layer on the connecting end face, and in this way, the bonding force between the layered structure and the tool base body 10 can be further enhanced, and the separation or falling phenomenon that occurs during cutting can be avoided. And / or, the hard layer 21 in the lowermost layered unit serves as the cutting edge portion of the tool, in other words, the outermost layer of the cutting edge portion 20 is the hard layer, and in this way, the cutting edge portion of the cutting edge portion 20 of the tool has high hardness and wear resistance, thereby improving the persistent sharpness of the tool.

[0074] In some embodiments, the hardness of the hard layer 21 is greater than the hardness of the tough layer 22, and in this way, the tough layer 22 and the hard layer 21 can form a cutting edge portion 20 with appropriate hardness to avoid the cutting edge of the tool from being brittle and broken due to excessive hardening during cutting, thereby ensuring the persistent sharpness of the tool.

[0075] As an example, the hardness of the hard layer 21 is 50HRC to 65HRC, and / or the hardness of the tough layer 22 is 20HRC to 40HRC. In this way, the hard layer 21 has sufficient hardness and wear resistance to resist wear and impact during cutting. The tough layer 22 has sufficient toughness to absorb impact and vibration during cutting. The tough layer 22 and the hard layer 21 in this hardness range can be combined to form a layered structure with appropriate hardness to form the cutting edge portion 20 of the tool, thereby ensuring the sharpness of the tool.

[0076] In some embodiments, the average thickness of the tough layer 22 is less than the average thickness of the hard layer 21, so that the hard layer can occupy the major part of the cutting edge portion 20, thereby providing sufficient hardness and wear resistance to cope with wear and impact during cutting. The thinner tough layer can reduce the overall thickness of the cutting edge portion 20 and the sharpness, while ensuring the strength and toughness of the connection, thereby prolonging the sharp life of the cutting tool.

[0077] For example, the average thickness of the hard layer 21 is 100-300 microns, and / or the average thickness of the tough layer 22 is 50-200 microns. In this way, the layered structure has a hard layer and a tough layer with a certain thickness, which can provide the required hardness and wear resistance for cutting, while maintaining a certain toughness to absorb impact and vibration during cutting, thereby avoiding the problem of cutting edge collapse of the cutting tool.

[0078] According to the present application, the material forming the hard layer 21 suitable for the cutting tool is various and can be selected based on actual needs. For example, the hard layer 21 is formed of tungsten alloy, nickel alloy, chromium alloy, titanium alloy, high-carbon steel or stainless steel, which has high hardness and melting point, good corrosion resistance, and can be used as a material for forming the cutting edge portion 20 of the cutting tool.

[0079] According to the present application, the material forming the tough layer 22 suitable for the cutting tool is various and can be selected based on actual needs. For example, the tough layer 22 is formed of nickel alloy, chromium alloy or cobalt alloy, which has low hardness, melting point and good toughness, can be used as a material for forming the cutting edge portion 20 of the cutting tool, and can cooperate with the material of the hard layer to form a cutting edge portion 20 with moderate hardness.

[0080] In some embodiments, each layer of the layered structure is a micron-level sublayer, and the number of layers of the layered structure is 4-10, so that at least the tip portion of the cutting edge portion 20 of the cutting tool or the entire cutting edge portion 20 can be formed under the expected thickness requirement.

[0081] In some embodiments, the layered structure includes a laser cladding layer, a plasma layer, an electric arc spraying layer or a flame spraying layer, where the laser cladding layer, the plasma layer, the electric arc spraying layer or the flame spraying layer refers to a layer formed by corresponding methods of laser cladding, plasma spraying, electric arc spraying or flame spraying.

[0082] In these embodiments, the layered structure can be formed by various coating methods, which can be selected based on the needs, thereby simplifying the manufacturing process of the cutting tool.

[0083] In some embodiments, the adjacent hard layer 21 and tough layer 22 are embedded with each other at the connecting interface, which can enhance the bonding strength between the sub-layers of the laminated structure, reduce the risk of tool failure caused by interlayer peeling, make the tool more reliable during cutting, and thus prolong the service life of the tool.

[0084] In some embodiments, the tip portion of the tool is a mixed layer of the hard layer 21 and the tough layer 22. In this way, the tip portion of the tool can have both the high hardness and wear resistance of the hard layer and the toughness and impact resistance of the tough layer, thereby exhibiting excellent cutting performance and durability when the tool is in use.

[0085] In the prior art, the tool is usually of a long length and a thin thickness. In particular, the thickness at the tip of the cutting edge portion 20 is usually lower (e.g., 0.4 mm). Therefore, for the tool with the laminated structure of the cutting edge portion 20, the interlayer peeling may occur in the cutting edge portion 20 with the laminated structure during actual use.

[0086] According to the present application, the laminated structure is conformal to the outer surface of the connecting end face 11. Specifically, each layer of the laminated structure extends in the form of the concave-convex of the connecting end face 11. In other words, each sub-layer in the laminated structure is conformally arranged on the connecting end face 11. Here, each sub-layer of the laminated structure is generally formed in a shape corresponding to the concave-convex shape of the connecting end face, and is stacked layer by layer, so that the adjacent sub-layers can have more connecting base points in the thickness direction, thereby enhancing the bonding force between the sub-layers inside the laminated structure, and reducing the risk of interlayer peeling.

[0087] According to the present application, the interlayer roughness of the laminated structure can also be set to enable more contact between the layers, so as to ensure the interlayer bonding force of the laminated structure.

[0088] In some embodiments, the laminated structure is arranged by a plurality of laminated units, each laminated unit including a hard layer 21 and a tough layer 22, the hard layer 21 and the tough layer 22 being arranged adjacent to each other, and the roughness of the tough layer 22 being greater than that of the hard layer 21. The rougher surface of the tough layer can easily penetrate or embed into the adjacent hard layer 21 in the subsequent heat treatment stage, so as to reduce the brittleness of the material of the tip portion without reducing the cutting performance. In addition, the rough surface of the tough layer can provide more contact points and occlusion effects, and thus better bonding with the adjacent layer (such as the hard layer or the substrate), thereby improving the stability and durability of the tool as a whole. When subjected to external force, the tougher tough layer can better disperse stress and reduce the occurrence of stress concentration.

[0089] In some embodiments, the toughness layer 22 has a roughness of 10-25 microns, which can facilitate the penetration or embedding of a part of the toughness layer into the adjacent hard layer 21 during the subsequent heat treatment stage, thereby better improving the toughness of the cutting edge portion 20, avoiding the collapse of the cutting edge portion 20, and avoiding the excessive thickness of the toughness layer 22 affecting the sharpness of the cutting tool after subsequent polishing. The hard layer 21 has a roughness of 5-10 microns, which can form a good combination with the toughness layer 22, and in the case that the outermost layer of the cutting edge portion 20 is the hard layer, the hard layer with roughness as the cutting edge can have a certain sawtooth edge, thereby improving the sharpness. In addition, the toughness layer 22 in the lowermost layer of the stacked unit can be easily “embedded” into the hard layer 21 during the subsequent heat treatment process, thereby better balancing the toughness and hardness of the cutting edge portion, and ensuring that the cutting edge of the cutting tool is not easy to collapse.

[0090] According to the present application, the outer edge of the cutting edge portion forms the cutting edge 23 of the cutting tool, and the cutting edge 23 of the cutting tool has a micro-sawtooth structure distributed along the length direction of the cutting tool. The micro-sawtooth structure of the cutting edge 23 can more easily cut into food during cutting, and the cutting resistance is smaller, thereby improving the cutting speed and efficiency of the cutting tool.

[0091] In the embodiments of the present application, the micro-sawtooth structure refers to a structure having a small sawtooth along the length direction of the cutting edge portion of the cutting tool. After stacking the stacked structure on the connecting end surface 11 having the convex and / or concave part, the roughness of the hard layer 21 in the lowermost layer will directly affect the concave-convex form of the final cutting edge 23. If the surface roughness of the hard layer 21 is higher, the concave-convex of the cutting edge 23 will also be more obvious. This concave-convex of the cutting edge caused by the roughness of the hard layer 21 will be further modified during the subsequent grinding process, thereby forming a micro-sawtooth structure. Specifically, during the manufacturing process of the cutting edge portion of the cutting tool, grinding treatment is required to achieve the required sharpness and shape. During the grinding process, due to the different hardness along the length direction of the cutting edge portion, the grinding amount is also different. Thus, the difference in grinding amount causes the part with higher hardness to be retained after grinding, forming the “teeth” of the sawtooth, and the part with lower hardness is polished off, forming the “groove” of the sawtooth. Thus, through grinding, a small and uniform sawtooth structure, i.e., a micro-sawtooth structure, can be formed on the cutting edge portion.

[0092] As an example, the height of the sawtooth can be 5-25 microns, and the width can be 10-25 microns.

[0093] According to the second aspect of the present application, a method for manufacturing a cutting tool is provided. The method for manufacturing a cutting tool comprises the following steps:

[0094] In step S101, a cutting tool base body having a connecting end surface 11 with a convex and / or concave part is provided.

[0095] Step S102, forming a multi-layer structure on the connecting end surface 11 of the tool base.

[0096] Step S103, polishing the multi-layer structure to form a blade edge portion with a laminated structure, thereby manufacturing a tool.

[0097] According to the tool manufacturing method provided by the embodiments of the present application, the connecting end of the tool base and the blade edge portion 20 is the connecting end surface 11 with convex and / or concave parts, which has a relatively increased bonding surface compared with the existing two-plane butt joint method, can be more firmly bonded with the blade edge portion 20, and improves the bonding force, thereby effectively reducing the risk of falling off at the bonding site in use, and further ensuring the service life of the tool.

[0098] The tool manufacturing method according to the present application will be described below in conjunction with embodiments.

[0099] Forming a tool body

[0100] In some embodiments, the tool base with the connecting end surface 11 with convex and / or concave parts is formed by polishing the cross-section at the base to be V or U-shaped, and the blade edge portion 20 is bonded on the connecting end surface 11, which can increase the bonding area of the blade edge portion 20 connected thereto, thereby more firmly bonding the two together and improving the bonding force.

[0101] It should be noted that the tool base with the connecting end surface 11 with convex and / or concave parts corresponds to the tool base 10 in the tool product.

[0102] Forming a multi-layer structure

[0103] According to the present application, a multi-layer structure is formed on the connecting end surface 11 of the tool base. In some embodiments, different metal materials are alternately sprayed on the connecting end surface 11 of the tool base to form a multi-layer structure with alternating hardness distribution on the connecting end surface 11. In a preferred embodiment, a ductile material and a hard material are selected, and a ductile layer and a hard layer are alternately formed on the tool base by alternately spraying the ductile material and the hard material, to form the multi-layer structure according to the present application.

[0104] In some embodiments, the multi-layer structure is formed by alternately stacking 4-10 layers of hard layers and ductile layers. The hard layer provides the cutting ability of the blade edge, and the ductile layer increases its impact resistance. By controlling the thickness and hardness of each layer, the overall performance of the tool can be optimized.

[0105] In some embodiments, the hard material is made of tungsten alloy, nickel alloy, chromium alloy, titanium alloy, high-carbon steel, stainless steel, and the like high-strength and high-hardness materials. The tough material is made of nickel alloy, chromium alloy, cobalt alloy, and the like materials with good toughness and impact resistance. The present application does not make too many limitations.

[0106] Forming a cutting edge portion having a layered structure

[0107] According to the present application, polishing the multi-layer structure can form a blade portion with a laminated structure. For example, the excess layers of the surface in the thickness direction of the convex tool base can be removed, and a blade portion with a V-shaped or V-like cross section can be formed by polishing.

[0108] In some embodiments, the laminated structure includes a hard layer 21 and a tough layer 22, which can form a blade portion 20. In order to further reduce the risk of blade collapse, after the interlayer stacking is completed, the method of manufacturing the tool further includes: laser heat treatment is performed on the blade portion 20 to further "fuse" the tough layer 22 and the hard layer 21. During the fusion process, the tough layer material will "flow out" due to its low melting point and high melting degree, so the part of the blade tip after fusion is not only the hard layer, but also the material of the tough layer 22, that is, the mixed layer of the tough layer 22 and the hard layer 21. On the one hand, it can reduce the brittleness of the blade tip part of the tool, and on the other hand, because the blade portion 20 after fusion has a soft and hard inlay material, after sharpening, the soft part wears more and the hard part wears less, so that the blade tip part of the tool is easy to form a micro-sawtooth structure.

[0109] In some embodiments, the laminated structure at least serves as a blade tip part of the tool with alternating distribution of hardness of the blade portion 20. Taking the structure of the blade tip part as an example, the weight of the hard layer of the blade tip part of the tool accounts for 80% to 95% of the total weight of the blade tip part, and the balance is the adjacent tough layer. The structure of the blade tip part can have appropriate hardness, long-lasting sharpness and is not easy to collapse. Here, the blade tip part is the region of the tool corresponding to the height of 5 microns to 10 microns from the blade edge 23.

[0110] Although the embodiments of the present application have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. However, it should be understood that these modifications and variations will still fall within the spirit and scope of the embodiments of the present application as defined by the claims.

Claims

1. A cutting tool, characterized by The tool comprises a tool base body (10) and a cutting edge portion (20), one side of the tool base body (10) in the height direction of the tool is a connecting end surface (11) with convex and / or concave portions, and the cutting edge portion (20) has a laminated structure and is connected to the connecting end surface (11).

2. The knife of claim 1, wherein, The convex and / or concave portions are arranged at least in the thickness direction of the tool.

3. The knife of claim 1, wherein, The laminated structure is laminated in the height direction of the tool and has alternating hardness distribution to form at least a cutting edge tip portion of the cutting edge portion (20).

4. The knife of claim 1, wherein, Each layer of the laminated structure extends in the form of the convex and / or concave portions of the connecting end surface (11).

5. The knife of claim 1, wherein, The laminated structure comprises alternating hard layers (21) and tough layers (22), wherein one layer of the laminated structure connected to the connecting end surface (11) is a tough layer, and one outermost layer of the cutting edge portion (20) is a hard layer.

6. The tool of claim 5 wherein, The hardness of the hard layer (21) is greater than the hardness of the tough layer (22); and / or, the average thickness of the tough layer (22) is less than the average thickness of the hard layer (21).

7. The tool according to claim 6, wherein The hard layer (21) is formed of tungsten alloy, nickel alloy, chromium alloy, titanium alloy, high carbon steel or stainless steel; and / or The tough layer (22) is formed of nickel alloy, chromium alloy or cobalt alloy; and / or The average thickness of the hard layer (21) is 100 microns to 300 microns; and / or The average thickness of the tough layer (22) is 50 microns to 200 microns; and / or The hardness of the hard layer (21) is 50HRC to 65HRC; and / or The hardness of the tough layer (22) is 20HRC to 40HRC.

8. The knife of claim 5, wherein, The adjacent hard layer (21) and tough layer (22) are embedded with each other at the connecting interface; and / or, the cutting edge tip portion of the tool is a mixed layer of the hard layer (21) and the tough layer (22).

9. The knife of claim 5, wherein, The roughness of the tough layer (22) is 10 microns to 25 microns, and the roughness of the hard layer (21) is 5 microns to 10 microns.

10. The knife of claim 1, wherein, The number of layers of the laminated structure is 4 to 10; and / or, the laminated structure comprises a laser cladding layer, a plasma layer, an electric arc spraying layer or a flame spraying layer.

11. The knife of claim 1, wherein, The connecting end surface (11) comprises a plurality of protrusions (111) and grooves (112) between adjacent protrusions (111); or, the connecting end surface (11) comprises a plurality of grooves (112) and protrusions (111) between adjacent grooves (112).

12. The tool of claim 11 wherein, The protrusions (111) are at least one of ring-shaped, columnar and conical; and / or The grooves (112) are at least one of ring-shaped, columnar and conical.

13. The knife of claim 1, wherein, The convex portion is a convex arc with a radius R1, wherein 0.05 millimeters ≤ R1 ≤ 0.6 millimeters; and the concave portion is a concave arc with a radius R2, wherein 0.05 millimeters ≤ R2 ≤ 0.6 millimeters.

14. The tool according to any one of claims 1 to 13, characterized in that An outer edge of the cutting edge portion (20) forms a cutting edge of the tool, and the cutting edge has a micro-sawtooth structure distributed in the length direction of the tool.

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