cutter

Abstract

The utility model provides a kind of cutter. Wherein, the edge of cutter has concave-convex structure extending along length direction, and the surface of the concave-convex structure has multiple micro-protrusions. According to the cutter of the utility model, the edge is provided with concave-convex structure along the length direction of cutter, and the surface of the concave-convex structure has multiple micro-protrusions. In other words, the edge of the cutter of the utility model has multistage dentiform structure, so, compared with micro-sawtooth structure, since the edge has multistage dentiform structure, under the assistance of concave-convex structure, micro-protrusion is more easily cut into food material, so that the sharp performance of cutter can be guaranteed well and durably.

Description

Technical Field

[0001] This utility model relates to the field of kitchen utensils technology, specifically to a knife. Background Technology

[0002] In existing technology, kitchen knives are typically made of stainless steel or high-carbon steel. During the manufacturing process, a cutting edge with a specific sheath angle is usually formed at one end of the knife. To achieve better sharpness, the sheath angle is generally minimized. While a smaller sheath angle is beneficial for cutting food, it also reduces durability and leads to blade dulling, resulting in a decrease in sustained sharpness. Current knives have relatively low sustained sharpness, failing to meet people's performance requirements. Therefore, developing new knives to meet the demand for sustained sharpness is of paramount importance. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a cutting tool to solve the problem of the generally poor long-term sharpness of cutting tools.

[0004] According to the present invention, a cutting tool is provided, wherein the cutting edge of the cutting tool has a concave-convex structure extending along the length direction, and the surface of the concave-convex structure has a plurality of micro-protrusions.

[0005] According to the present invention, the cutting edge has a concave-convex structure along the length of the blade, and the surface of the concave-convex structure has multiple micro-protrusions. In other words, the cutting edge of the present invention has a multi-level toothed structure. Thus, compared with a micro-serrated structure, because the cutting edge has a multi-level toothed structure, the micro-protrusions are more likely to cut into food with the assistance of the concave-convex structure, thereby ensuring the good and lasting sharpness of the blade.

[0006] In some embodiments, the convex-concave structure includes a plurality of convex buds and a groove located between adjacent convex buds, the micro-protrusions being formed on the surface of the convex buds and / or the grooves.

[0007] In these embodiments, the micro-protrusions on the raised positions are more prominent, making it easier to cut into food. The concave-convex structure can withstand the impact force during cutting, at least protecting the micro-protrusions in the grooves and reducing their deformation due to uneven stress, thus ensuring the long-term sharpness of the knife during use. Furthermore, even if the micro-protrusions on the raised positions wear or become dull due to prolonged use, the micro-protrusions in the grooves can still remain sharp. In other words, even after the micro-protrusions on the raised positions wear down, the knife can still use the portion of the micro-protrusions in the grooves for cutting, thereby improving the knife's long-term sharpness.

[0008] In some embodiments, the width W1 of the convex hump is 50 micrometers to 300 micrometers; and / or, the width W2 of the groove is 50 micrometers to 300 micrometers, and the depth H2 of the groove is 25 micrometers to 150 micrometers; and / or, the width of the micro-protrusion is 10 micrometers to 50 micrometers, and the spacing between the micro-protrusions is less than or equal to 50 micrometers; and / or, the height H1 of the convex hump is 25 micrometers to 150 micrometers, and the height of the micro-protrusion is 5 micrometers to 25 micrometers.

[0009] In these embodiments, the convex bulges, grooves, and micro-protrusions of specific dimensions can ensure the long-lasting sharpness of the tool and enable the tool to maintain stable cutting performance during the cutting process, while extending the tool's service life.

[0010] In some embodiments, the cutting tool includes a tool body and a hard layer formed on the tool body, the hard layer forming the convex-concave structure and the micro-protrusions.

[0011] In these embodiments, the cutting edge of the tool is formed with a hard layer to create an uneven structure and micro-protrusions, thereby ensuring the cutting sharpness and wear resistance of the tool by utilizing the hardness of the hard layer.

[0012] In some embodiments, the hard layer is an alloy particle layer, which includes alloy particles with a first particle size R1 and alloy particles with a second particle size R2, wherein 25 micrometers ≤ R1 < 150 micrometers, 5 micrometers ≤ R2 ≤ 25 micrometers, and R1 is greater than R2.

[0013] In these embodiments, an alloy particle layer is formed by alloy particles of different sizes to serve as a hard layer. The surface and internal structure of this hard layer can continuously form a cutting edge with a multi-level tooth structure after subsequent grinding, thereby ensuring the long-lasting sharpness of the cutting tool during later use.

[0014] In some embodiments, the alloy particle layer includes one of a stainless steel particle layer, a tool steel alloy particle layer, a titanium alloy particle layer, a chromium alloy particle layer, a nickel alloy particle layer, and a cobalt alloy particle layer.

[0015] In these embodiments, the alloy particle layer possesses good hardness and wear resistance, ensuring the hardness and wear resistance of the hardened layer, thereby achieving a durable and sharp cutting edge. Furthermore, the alloy particle layer also possesses a certain degree of toughness, ensuring the bonding force between the hardened layer and the tool body, thus preventing the hardened layer from easily detaching during use and avoiding chipping, thereby guaranteeing a long-lasting sharpness of the tool.

[0016] In some embodiments, the hard layer is formed by one of the following methods: arc spraying, flame spraying, plasma spraying, high-speed oxy-fuel spraying, cold spraying, laser cladding, plasma cladding, and electron beam melting. These spraying methods enable the surface of alloy particles to be micro-melted, forming a layer with a rough surface structure. This allows for the combination of alloy particles of different sizes (multi-sized alloy particles) to form a hard layer, paving the way for a cutting edge with a multi-level tooth structure, which is beneficial for improving the sharpness of the tool.

[0017] In some embodiments, the particle size difference between the alloy particles of the first particle size R1 and the alloy particles of the second particle size R2 is greater than or equal to 20 micrometers; and / or, the ratio of the number of alloy particles of the first particle size R1 to the number of alloy particles of the second particle size R2 can be 1:(5-50). Such a particle size difference and number ratio can refine the cutting edge of the formed tool, making the concave and convex shape of the cutting edge more dense, and more conducive to forming a cutting edge with a multi-stage tooth structure according to the present invention, thereby improving the sharpness of the tool.

[0018] In some embodiments, the alloy particle layer also contains dispersed non-metallic ceramic particles; in other words, the hard layer is a composite layer of alloy particles and non-metallic ceramic particles. Thus, the non-metallic ceramic particles in the hard layer can increase the strength of the cutting edge due to their higher hardness, making the blade less prone to chipping and wear, thereby achieving a knife with further enhanced and lasting sharpness.

[0019] In some embodiments, the particle size of the non-metallic ceramic particles is R3, where 10 micrometers ≤ R3 ≤ 50 micrometers, and R1 ≤ R3 ≤ R2. If the particle size of the non-metallic ceramic particles is too large, it will make cutting uneven and affect the cutting experience; if the particle size of the non-metallic ceramic particles is too small, the improvement in sharpness will not be significant. Non-metallic ceramic particles of appropriate size, as part of the hard layer, can improve the sharpness of the tool while ensuring the cutting experience.

[0020] In some embodiments, non-metallic ceramic particles are embedded on alloy particles of the first particle size R1. In this way, the non-metallic ceramic particles in the hard layer and the alloy particles of the second particle size can have good bonding. Thus, when the non-metallic ceramic particles are part of the micro-protrusions forming the cutting edge, they are not easy to fall off due to their strong bonding force, thereby maintaining their sharpness.

[0021] In some embodiments, the non-metallic ceramic particles include one of the following: titanium carbide particles, titanium nitride particles, titanium carbonitride particles, titanium aluminum nitride particles, tungsten carbide particles, tungsten discarbide particles, alumina particles, zirconium dioxide particles, silicon carbide particles, boron carbide particles, tantalum carbide particles, niobium carbide particles, silicon nitride particles, cubic boron nitride particles, aluminum nitride particles, titanium diboride particles, and zirconium diboride particles. In these embodiments, the non-metallic compound used for the cutting tool can possess suitable hardness and wear resistance, making the cutting edge of the formed tool more wear-resistant, thereby improving the durability of the multi-stage toothed cutting edge during use and avoiding the inconvenience of frequent sharpening.

[0022] In some embodiments, the average thickness of the hardened layer is 1 micrometer to 10 micrometers. When the hardened layer is too thin, the cutting edge will wear or be damaged rapidly during cutting or use. When the hardened layer is too thick, although the hardness may be further increased, it may also lead to increased brittleness of the cutting edge, reducing its impact resistance and toughness. Thus, a hardened layer of appropriate thickness can ensure that the area near the cutting edge has suitable strength and hardness, thereby enhancing the wear resistance and impact resistance of the cutting edge. Attached Figure Description

[0023] The above and other objects and features of this utility model will become clearer from the following description of embodiments in conjunction with the accompanying drawings, in which: Figure 1 This is a right-side structural schematic diagram of the cutting tool according to the first embodiment of the present utility model; Figure 2 This is a left-side view of the cutting tool according to the first embodiment of the present invention; Figure 3 yes Figure 1 AA of the cutting tools ， Schematic diagram of the cross-sectional structure at the location; Figure 4 This is a schematic diagram of another cross-sectional structure of the cutting tool according to the first embodiment of this utility model; Figure 5 yes Figure 1 Enlarged structural diagram at point I; Figure 6 This is a structural schematic diagram of the manufacturing process of the tool according to the first embodiment of the present invention; Figure 7 This is a right-side structural schematic diagram of a cutting tool according to the second embodiment of the present utility model; Figure 8 This is a left-side structural schematic diagram of a cutting tool according to the second embodiment of the present utility model; Figure 9 yes Figure 7 A schematic diagram of the cross-sectional structure in the diagram; Figure 10 yes Figure 7 Enlarged structural diagram at point J; Figure 11 This is a right-side view of another cutting tool according to the second embodiment of the present utility model; Figure 12 This is a left-side view of another cutting tool according to the second embodiment of the present utility model; Figure 13 yes Figure 11 A schematic diagram of the cross-sectional structure in the diagram; Figure 14 yes Figure 11 A magnified structural diagram at point K.

[0024] Tag Name 10. Tool body; 11. First surface; 12. Second surface; 13. End position; 14. Lower end; 20. Hard layer; 21. Alloy particles with a first particle size R1; 22. Alloy particles with a second particle size R2; 30. Concave-convex structure; 31. Protrusion; 32. Groove; 40. Micro-protrusion; 50. Cutting edge; 51. Cutting edge; 60. Hard coating layer; 70. Back of the tool. Detailed Implementation

[0025] The following detailed descriptions are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but may be altered as will become clear upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0026] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, apparatus and / or systems described herein, many of which will become clear upon understanding the disclosure of this utility model.

[0027] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.

[0028] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Thus, without departing from the teaching of the examples described herein, the first component, first assembly, first region, first layer, or first part referred to as the first component, first assembly, first region, first layer, or first part may also be referred to as the second component, second assembly, second region, second layer, or second part.

[0029] In the specification, when an element such as a layer, region, or substrate is described as being "on" another element, "connected to," or "mounted to" another element, the element may be directly "on" another element, directly "connected to," or "mounted to" the other element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on" another element, "directly connected to," or "directly mounted to" another element, no other elements may be present in between.

[0030] The terminology used herein is for describing various examples only and is not intended to limit the invention. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the described features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. The term “a plurality” represents any quantity of two or more.

[0031] The directional terms "upper," "lower," "inner," and "outer" used in this utility model are all based on the reference position of the tool when it is in normal use. This definition method will help ensure that the reader or user can clearly understand the relative positional relationship of the various components and functions, and should not be construed as a limitation of this utility model.

[0032] Unless otherwise defined, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains after understanding the invention. Unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and in this invention, and shall not be interpreted in an idealized or overly formalistic manner.

[0033] Furthermore, in the description of the examples, detailed descriptions of well-known related components or functions will be omitted when it is believed that such detailed descriptions would lead to a vague interpretation of the present invention.

[0034] The following will combine Figures 1 to 14 The present invention will now be described in the form of a cutting tool provided in an embodiment of this utility model.

[0035] A cutting tool is provided according to an embodiment of the present invention. The cutting edge 51 of the cutting tool has a concave-convex structure 30 extending along the length direction, and the surface of the concave-convex structure 30 has a plurality of micro-protrusions 40.

[0036] According to the knife of this utility model, the cutting edge 51 is provided with a concave-convex structure 30 along the length direction of the knife, and the surface of the concave-convex structure 30 has a plurality of micro-protrusions 40. In other words, the cutting edge 51 of the knife of this utility model has a multi-level tooth structure. Thus, compared with a micro-serrated structure, because the cutting edge 51 has a multi-level tooth structure, with the assistance of the concave-convex structure 30, the micro-protrusions 40 are more likely to cut into food, thereby ensuring the knife's good and lasting sharpness.

[0037] In this utility model, such as Figure 1 and Figure 5 As shown, the cutting tool includes a cutting edge 50 and a back 70. The cutting edge 50 is the main functional area for cutting, while the back 70 provides support and stability. The cutting edge 50 and the back 70 are respectively located on opposite sides of the tool's height. The cutting edge 51 is the tip of the cutting edge 50 (the outer edge of the cutting edge 50), also known as the cutting tip. In this invention, the cutting edge 51 has a concave-convex structure 30 extending along the length of the tool, and the surface of the concave-convex structure 30 has multiple micro-protrusions 40. These micro-protrusions 40 are formed on the surface of the concave-convex structure 30, effectively forming multiple micro-serrations on the cutting edge with the concave-convex structure 30. Here, the size, shape, and distribution density of the micro-protrusions 40 can be adjusted according to different tool types.

[0038] In this invention, the cutting edge 51 of the knife includes a concave-convex structure 30 and multiple micro-protrusions 40 (secondary concave-convex contours) formed on the concave-convex structure 30 (primary concave-convex contour). In other words, the cutting edge 51 of this invention has a multi-level toothed structure. When cutting, this knife exerts greater pressure than conventional knives under the same applied force, thus cutting into food more easily, maintaining its sharpness for longer, and improving cutting efficiency.

[0039] Specifically, the concave-convex structure 30 includes a plurality of protrusions 31 and grooves 32 located between adjacent protrusions 31. Micro-protrusions 40 are formed on the surface of the protrusions 31 and / or grooves 32. The protrusions 31 and grooves 32 may be distributed uniformly or unevenly, and the present invention does not impose too many limitations on this.

[0040] In these embodiments, the micro-protrusions 40 located at the protrusion 31 are more prominent, making it easier to cut into food. The concave-convex structure 30 can withstand the impact force during cutting, at least protecting the micro-protrusions 40 located in the groove 32 and reducing their deformation due to uneven force, thus ensuring the long-term sharpness of the knife during use. Furthermore, even if the micro-protrusions 40 at the protrusion location wear or become dull due to prolonged use, the micro-protrusions 40 located in the groove can still remain sharp. In other words, even after the micro-protrusions 40 at the protrusion location wear down, the knife can still use the portion of the micro-protrusions 40 located in the groove 32 for cutting, thereby improving the long-term sharpness of the knife.

[0041] In some embodiments, the knife can be a kitchen knife, specifically a Chinese kitchen knife, a Western kitchen knife, or a Japanese kitchen knife. Chinese kitchen knives include slicing knives, cleavers, or dual-purpose knives; Western kitchen knives include chef's knives, santoku knives, boning knives, or bread knives; and Japanese kitchen knives include yanagiba knives, deba knives, or takoyaki knives. Furthermore, it should be noted that this invention does not limit the knife to a kitchen knife; those skilled in the art can apply the teachings of this invention to other types of knives, such as industrial knives or surgical knives.

[0042] In this invention, the cutting edge 50 of the tool can be constructed by the hard layer 20. At the same time, the tool with a multi-level tooth structure can be obtained by means of the distribution pattern of the hard layer 20.

[0043] The structure of the cutting tool according to the first embodiment of the present invention will be described in detail below.

[0044] According to the first embodiment of this utility model, the hard layer 20 is stacked on the inclined surface in the thickness direction of the tool body 10. For example... Figures 1 to 5 As shown, the cutting tool includes a tool body 10 and a hard layer 20. The hard layer 20 is formed on a surface of the tool body 10 in the thickness direction and extends beyond the end position 13 of the tool body 10 or extends to intersect with the end position 13 of the tool body 10, thereby forming a cutting edge 51. The cutting edge 51 of the tool has a concave-convex structure 30 composed of multiple protrusions 31 along its length direction, and the surface of the protrusions 31 of the concave-convex structure 30 has multiple micro-protrusions 40.

[0045] According to the present invention, the cutting edge 51 is provided with a concave-convex structure 30 composed of multiple protrusions 31 along the length direction of the knife, and the surface of the protrusions 31 of the concave-convex structure 30 has multiple micro-protrusions 40. In other words, the cutting edge 51 of the present invention has a multi-level tooth structure. Thus, compared with a micro-serrated structure, because the cutting edge 51 has a multi-level tooth structure, with the assistance of the protrusions 31 of the concave-convex structure 30, the micro-protrusions 40 on the protrusions 31 are more likely to cut into food, thereby ensuring good and lasting sharpness of the knife. In addition, a surface with a suitable bonding area can be easily formed on one surface in the thickness direction of the knife body 10. A hard layer 20 is connected to this surface, and the cutting edge 51 of the knife is constructed by means of the portion of the hard layer 20 extending toward the cutting edge 51. In this way, the purpose of the knife's lasting sharpness can be achieved while increasing the bonding strength between the knife body 10 and the hard layer 20. Furthermore, due to the high bonding strength between the tool body 10 and the hard layer 20, the two are not easily detached or peeled off, thereby further enhancing the tool's long-lasting sharpness.

[0046] According to the present invention, the concave-convex structure 30 includes a convex 31 and a groove 32, the groove 32 is disposed between adjacent convex 31, and micro protrusions 40 are formed on the surface of the groove 32.

[0047] In these embodiments, micro-protrusions 40 are formed on the surfaces of both the convex bulge 31 and the groove 32. This increases the occupancy rate of the micro-protrusions 40 on the concave-convex structure 30, which facilitates better cutting of food and further enhances the long-lasting sharpness. In addition, the micro-protrusions 40 located on the surface of the groove 32 are effectively protected by the concave-convex structure 30 and are not easily damaged during use, thereby improving the long-lasting sharpness of the knife.

[0048] In some embodiments, the width W1 of the convex hull 31 is 50 micrometers to 300 micrometers, the height H1 of the convex hull 31 is 25 micrometers to 150 micrometers, the width W2 of the groove 32 is 50 micrometers to 300 micrometers, the depth H2 of the groove 32 is 25 micrometers to 150 micrometers, the width of the micro-protrusion 40 is 10 micrometers to 50 micrometers, the height is 5 micrometers to 25 micrometers, and the spacing between the micro-protrusions 40 is less than or equal to 50 micrometers.

[0049] In these embodiments, the convex 31, groove 32 and micro protrusion 40 of specific dimensions can ensure the long-lasting sharpness of the tool and enable the tool to maintain stable cutting performance during the cutting process, while extending the tool's service life.

[0050] According to this utility model, the cutting tool includes a tool body 10 and a hard layer 20 formed on the tool body 10. The hardness of the hard layer 20 is greater than the hardness of the tool body 10. The lower end of the hard layer 20 forms a concave-convex structure for the cutting edge 51 of the tool and micro-protrusions 40 located on the concave-convex structure. As a specific example, the Vickers hardness of the tool body 10 is 200HV-700HV, and the Vickers hardness of the hard layer 20 is 500HV-2500HV. Thus, by specifying the hardness of the tool body 10 and the hard layer 20, a cutting edge portion of the tool with suitable hardness can be constructed, thereby further improving the tool's long-lasting sharpness. In a preferred embodiment, the Vickers hardness difference between the tool body 10 and the hard layer 20 is greater than or equal to 20HV. By setting a suitable hardness difference between the tool body 10 and the hard layer 20, a cutting edge portion of the tool with suitable hardness can be constructed, thereby further improving the tool's long-lasting sharpness.

[0051] In these embodiments, the lower end of the hard layer 20 is arranged with concave and convex surfaces to form the concave-convex structure 30 and micro-protrusions 40 of the cutting edge 51 of the tool. In this way, the hardness of the hard layer 20 can be used to ensure the cutting sharpness and wear resistance of the tool. In addition, the material cost of the hard layer 20 is usually higher than the material cost of the tool body 10. By applying hard material only at the cutting edge 50 of the tool, the manufacturing cost of the tool can be reduced while ensuring the sharpness of the tool.

[0052] In some embodiments, the hard layer 20 is an alloy particle layer. Specifically, the hard layer 20 is formed by spraying and polishing alloy particles of different sizes. The particles of different sizes can be close to each other, or even stacked, or they can be spaced apart, but the maximum distance does not exceed 200 micrometers, thereby forming the hard layer 20 through stacking.

[0053] As a specific example, the alloy particle layer includes alloy particles 21 with a first particle size R1 and alloy particles 22 with a second particle size R2, wherein 25 micrometers ≤ R1 < 150 micrometers, 5 micrometers ≤ R2 ≤ 25 micrometers, and R1 is greater than R2. Spraying the alloy particles 21 with the first particle size R1 and the alloy particles 22 with the second particle size R2 enables the hard layer 20. It can be understood that the particle size forming the hard layer 20 is an aggregate of large and small particle sizes. Here, the particle size is expressed as D50 (median particle size).

[0054] Specifically, the alloy particle layer includes one of the following: stainless steel particle layer, tool steel alloy particle layer, titanium alloy particle layer, chromium alloy particle layer, nickel alloy particle layer, and cobalt alloy particle layer.

[0055] In a preferred embodiment, the alloy particles 21 with a first particle size R1 and the alloy particles 22 with a second particle size R2 have a suitable particle size difference and quantity distribution. For example, the particle size difference between the alloy particles 21 with the first particle size R1 and the alloy particles 22 with the second particle size R2 is greater than or equal to 20 micrometers, and the ratio of the number of alloy particles 21 with the first particle size R1 to the number of alloy particles 22 with the second particle size R2 can be 1:(5-50). Such a particle size difference and quantity ratio can refine the cutting edge of the formed tool, making the concave and convex shape of the cutting edge 51 of the tool more dense, and more conducive to forming the multi-level toothed structure of the cutting edge 51 according to this invention, thereby improving the sharpness of the tool.

[0056] In these embodiments, by using alloy particles of different sizes to form an alloy particle layer as a hard layer 20, the surface and internal structure of the hard layer 20 can continuously form a cutting edge 51 with a multi-level tooth structure after subsequent grinding, thereby ensuring the long-lasting sharpness of the cutting tool during later use.

[0057] In some embodiments, the hard layer 20 is a sprayed layer formed using alloy particles through existing processes. Existing processes include one of the following: arc spraying, flame spraying, plasma spraying, high-velocity oxy-fuel spraying, cold spraying, laser cladding, plasma cladding, and electron beam melting. These spraying methods enable the alloy particles to undergo micro-melting, forming a layer with a rough surface structure. This allows for the combination of alloy particles 22 of different sizes (multi-sized alloy particles) to obtain the hard layer 20, paving the way for a cutting edge 51 with a multi-level tooth structure, which is beneficial for improving the sharpness of the tool.

[0058] In some embodiments, the alloy particles 21 with a first particle size R1 and the alloy particles 22 with a second particle size R2 are of the same alloy type. Correspondingly, the hard layer is a stacked layer of the same type of material formed by particles of different sizes. The alloy particles are existing materials, including stainless steel particles, tool steel alloy particles, titanium alloy particles, chromium alloy particles, nickel alloy particles, and cobalt alloy particles. As a specific example, tool steel alloy particles are alloy particles formed by adding alloying elements such as carbon (C), tungsten (W), molybdenum (Mo), and vanadium (V) based on iron (Fe), which also belongs to existing materials.

[0059] In these embodiments, the alloy particles possess good hardness and wear resistance, ensuring the hardness and wear resistance of the hardened layer, thereby obtaining a durable and sharp cutting edge 51. Furthermore, the alloy particles also possess a certain degree of toughness, ensuring the bonding force between the hardened layer 20 and the tool body 10, thus preventing the hardened layer 20 from easily detaching during use and avoiding chipping, thereby ensuring a long-lasting sharpness of the tool.

[0060] Continuing with the above examples, the hard layer 20 specifically includes: arc-sprayed stainless steel layer, flame-sprayed stainless steel layer, plasma-sprayed stainless steel layer, high-velocity oxygen fuel-sprayed stainless steel layer, cold-sprayed stainless steel layer, laser-clad stainless steel layer, plasma-clad stainless steel layer, electron beam melting stainless steel layer, arc-sprayed nickel-molybdenum alloy layer, flame-sprayed nickel-molybdenum alloy layer, plasma-sprayed nickel-molybdenum alloy layer, high-velocity oxygen fuel-sprayed nickel-molybdenum alloy layer, cold-sprayed nickel-molybdenum alloy layer, laser-clad nickel-molybdenum alloy layer, plasma-clad nickel-molybdenum alloy layer, electron beam melting nickel-molybdenum alloy layer, arc-sprayed tool steel alloy layer, flame-sprayed tool steel alloy layer, plasma-sprayed tool steel alloy layer, high-velocity oxygen fuel-sprayed tool steel alloy layer, cold-sprayed tool steel alloy layer, laser-clad tool steel alloy layer, and plasma-clad tool steel alloy layer. The first of the following: electron beam molten tool steel alloy layer, arc sprayed titanium alloy layer, flame sprayed titanium alloy layer, plasma sprayed titanium alloy layer, high-velocity oxygen fuel sprayed titanium alloy layer, cold sprayed titanium alloy layer, laser cladding titanium alloy layer, plasma cladding titanium alloy layer, electron beam molten titanium alloy layer, arc sprayed nickel-based alloy layer, flame sprayed nickel-based alloy layer, plasma sprayed nickel-based alloy layer, high-velocity oxygen fuel sprayed nickel-based alloy layer, cold sprayed nickel-based alloy layer, laser cladding nickel-based alloy layer, plasma cladding nickel-based alloy layer, electron beam molten nickel-based alloy layer, arc sprayed cobalt-based alloy layer, flame sprayed cobalt-based alloy layer, plasma sprayed cobalt-based alloy layer, high-velocity oxygen fuel sprayed cobalt-based alloy layer, cold sprayed cobalt-based alloy layer, laser cladding cobalt-based alloy layer, plasma cladding cobalt-based alloy layer, and electron beam molten cobalt-based alloy layer.

[0061] In some embodiments, the thickness of the hard layer 20 is 1 micrometer to 10 micrometers. When the hard layer is too thin, the cutting edge will wear or be damaged rapidly during cutting or use. When the hard layer is too thick, although the hardness may be further increased, it may also lead to increased brittleness of the cutting edge, reducing its impact resistance and toughness. Thus, a hard layer 20 of appropriate thickness can ensure that the region of the cutting edge 50 near the cutting edge 51 has appropriate strength and hardness, thereby enhancing the wear resistance and impact resistance of the cutting edge 50.

[0062] In some embodiments, the alloy particle layer also contains dispersed non-metallic ceramic particles, the hardness of which is greater than that of the alloy particles. In other words, the hard layer 20 is a composite layer of alloy particles and non-metallic ceramic particles that are harder than the alloy particles. Thus, the non-metallic ceramic particles in the hard layer 20 can increase the strength of the cutting edge due to their greater hardness, making them less prone to chipping and wear, thereby obtaining a knife with further improved durability and sharpness.

[0063] More specifically, a portion of the alloy particles 22 with a second particle size R2 and a portion of the non-metallic ceramic particles are dispersed on the surface of the hard layer 20 to form micro-protrusions 40. This ensures the tool has suitable hardness in the initial stages of use, thereby achieving good sharpness. In some embodiments, the non-metallic ceramic particles are also dispersed within the hard layer 20. During subsequent sharpening processes, these non-metallic ceramic particles may be exposed and serve as micro-protrusions 40 after sharpening, thus ensuring the tool's long-lasting sharpness.

[0064] In some embodiments, the particle size of the non-metallic ceramic particles is R3, wherein 10 micrometers ≤ R3 ≤ 50 micrometers, and R1 ≤ R3 ≤ R2. If the particle size of the non-metallic ceramic particles is too large, it will make cutting uneven and affect the cutting experience; if the particle size of the non-metallic ceramic particles is too small, the improvement in sharpness will not be significant. Non-metallic ceramic particles of appropriate size, as part of the hard layer 20, can improve the sharpness of the tool while ensuring the cutting experience.

[0065] In some embodiments, non-metallic ceramic particles are embedded on alloy particles 21 with a first particle size R1. In this way, the non-metallic ceramic particles in the hard layer 20 and the alloy particles 22 with a second particle size R2 can have good bonding. Thus, when the non-metallic ceramic particles are part of the micro-protrusions 40 forming the cutting edge 51, they are not easy to fall off due to their strong bonding force, thereby maintaining their sharpness.

[0066] In some embodiments, the non-metallic ceramic particles are existing materials, including one of titanium carbide (TiC) particles, titanium nitride (TiN) particles, titanium carbonitride (TiCN) particles, titanium aluminum nitride (TiAlN) particles, tungsten carbide (WC) particles, tungsten discarbide (W2C) particles, alumina (Al2O3) particles, zirconium dioxide (ZrO2) particles, silicon carbide (SiC) particles, boron carbide (B4C) particles, tantalum carbide (TaC) particles, niobium carbide (NbC) particles, silicon nitride (Si3N4) particles, cubic boron nitride (cBN) particles, aluminum nitride (AlN) particles, titanium diboride (TiB2) particles, and zirconium diboride (ZrB2) particles.

[0067] In these embodiments, the non-metallic compound used for the cutting tool can have suitable hardness and wear resistance, which can make the cutting edge of the formed tool more wear-resistant, thereby improving the durability of the cutting edge of the multi-stage tooth structure of the tool during use and avoiding the trouble of frequent sharpening.

[0068] like Figure 3As shown, the portion of the tool body 10 connected to the hard layer 20 includes a first surface 11 and a second surface 12 opposite each other in its thickness direction. The first surface 11 and the second surface 12 extend obliquely relative to the height direction of the tool body 10, thereby intersecting obliquely. The angle between the first surface 11 and the height direction of the tool is α, and the angle between the second surface 12 and the height direction of the tool is β, wherein α is less than or equal to β. The hard layer 20 is disposed on the first surface 11 and extends beyond the intersection of the first surface 11 and the second surface 12.

[0069] As an example, α is 10°-15°, β is 15°-20°, and α is 3°-8° smaller than β.

[0070] like Figure 4 As shown, the portion of the tool body 10 connected to the hard layer 20 includes a first surface 11 and a second surface 12 opposite each other in its thickness direction. The first surface 11 and the second surface 12 extend obliquely relative to the height direction of the tool body 10, thus intersecting obliquely. The angle between the first surface 11 and the height direction of the tool is α, and the angle between the second surface 12 and the height direction of the tool is β, wherein α is less than or equal to β. The hard layer 20 is disposed on the first surface 11 and extends to the lower end of the tool body 10.

[0071] As an example, α is 10°-15°, β is 15°-20°, and α is 3°-8° smaller than β, and the first surface 11 and the second surface 12 are inclined planes.

[0072] Both of these structural forms enable the cutting edge 51 of the tool to have a multi-stage tooth structure, thereby ensuring the tool's long-lasting sharpness.

[0073] In this invention, to clearly define the formation location of the hard layer 20, a portion of the hard layer 20 is marked as a black area. It should be noted that this invention does not limit the color of the hard layer 20 to include black; its color depends on the actual material selected. For example, the hard layer can also be a conventional metallic color, identical to the color of the tool body 10.

[0074] In the first embodiment of this utility model, as Figure 3 As shown, a hard layer 20 is formed on one surface of the tool body 10 in the thickness direction and extends beyond the end position 13 of the tool body 10, thereby forming the cutting edge 51 of the tool according to an embodiment of the present invention. Figure 4 As shown, a hard layer 20 is formed on one surface of the tool body 10 in the thickness direction and extends to intersect with the end position 13 of the tool body 10, thereby forming the cutting edge 51 of the tool in another embodiment of the present invention.

[0075] The manufacturing method of a corresponding cutting tool specifically includes the following steps.

[0076] (1) Prepare the initial blade blank.

[0077] According to this invention, the two surfaces of the initial blade blank in the thickness direction can be inclined surfaces, thus forming a generally inverted conical structure.

[0078] (2) Pre-processing stage.

[0079] Cleaning: First, the surface of the initial tool blank is cleaned to remove oil and rust, ensuring the surface smoothness and adhesion of the initial tool blank. Here, the two surfaces of the initial tool blank are referred to as the first main surface and the second main surface, respectively.

[0080] Degreasing: Removing grease from the surface of the initial blade blank using chemical or physical methods.

[0081] Rust removal: Removes rust and other impurities from the surface of the initial blade blank to improve the adhesion of the hard layer.

[0082] (3) The first main surface after pretreatment is obliquely ground to form a tool base with an inclined surface.

[0083] According to this invention, a method for manufacturing a cutting tool includes obliquely grinding one surface of the initial cutting tool blank along its thickness direction on one edge in the width direction, thereby forming a cutting tool base with an inclined surface. For example, obliquely grinding the first main surface on the thinner edge of the initial cutting tool blank forms a first inclined surface with a larger inclination angle, thereby obtaining a cutting tool base with an inclined surface.

[0084] (4) A hard coating layer 60 is formed by spraying alloy particles onto the tool substrate with an inclined surface.

[0085] (5) Grind the other surface opposite to the inclined surface (the second main surface). Here, it should be noted that a part of the inclined surface corresponds to the first surface 11 of the tool body, and the other surface opposite to the inclined surface, after grinding, corresponds to the second surface 12 of the tool body.

[0086] According to this utility model, the manufacturing method of the cutting tool further includes grinding the cutting tool having a hard coating 60, thereby forming the cutting tool with a hard layer 20 of this utility model. Here, it should be noted that the hard layer 20 is the portion of the hard coating 60 retained after grinding.

[0087] Figure 3 and Figure 4 The cross-sectional structural diagrams of the cutting edge of the tool are shown respectively. Figure 6 A schematic diagram of the tool with a hard coating 60 is shown, with reference to... Figure 3and Figure 6 , can be followed in sequence Figure 6 BB ， CC ， and DD ， The dotted lines shown are polished to form a shape like... Figure 3 The cutting edge of the tool is shown. (Refer to...) Figure 4 and Figure 6 , can follow Figure 6 BB ， CC ， and EE ， The dotted lines shown are polished to form a shape like... Figure 4 The cutting edge of the tool is shown.

[0088] It should be noted that, along Figure 6 CC ， The dotted lines shown are used for polishing to improve the appearance of the resulting tool and achieve the desired result. Figure 3 The cutting edge of the tool shown has a hardened layer 20 formed on one surface of the tool body 10 in the thickness direction, extending beyond the end position 13 of the tool body 10. Along... Figure 6 DD ， or EE ， The dotted lines shown are polished to prevent the surface from becoming too rough and affecting the cutting experience of the tool, and to achieve a surface finish as described above. Figure 4 The cutting edge of the tool shown has a hardened layer 20 formed on a surface of the tool body 10 in the thickness direction. This layer does not protrude beyond the edge of the tool body 10, but extends to intersect with the end position 13 of the tool body 10. Both of these methods result in the cutting edge 51 having a concave-convex structure 30 extending along its length, and the surface of the concave-convex structure 30 has multiple micro-protrusions 40, thus forming a multi-level toothed structure on the cutting edge 51.

[0089] Furthermore, it should be noted that this utility model does not limit the manufacturing method of the tool. It is understood that those skilled in the art can also form the tool according to this utility model using methods known to them. As an example, another tool manufacturing method is provided, in which an uneven structure layer is first formed on the tool substrate by spraying alloy particles 21 with a first particle size R1, and then an even finer particle layer is formed by spraying alloy particles 22 with a second particle size R2 or non-metallic ceramic particles on the uneven structure layer. The hard layer 20 with a layered structure obtained in this way can also be used to form the cutting edge 51 of the tool with a multi-level tooth structure of this utility model by means of a certain grinding process through the surface and internal structure of the hard layer 20.

[0090] The structure of the cutting tool according to the second embodiment of this utility model will be described in detail below. It should be noted that the structure of the concave-convex structure and the hard layer can be referred to the relevant description of the first embodiment. In the second embodiment, only the differences need to be described in detail, and the similarities will not be repeated.

[0091] According to a second embodiment of the present invention, a hard layer 20 is stacked on the end of the tool body 10 in the height direction. The tool includes a tool body 10 and a hard layer 20, the hard layer 20 being formed at the lower end 14 of the tool body 10 in the height direction, serving as the cutting edge 51 of the tool. The lower end of the hard layer 20 is arranged with concave and convex sections, such that the cutting edge 51 of the tool has a concave-convex structure 30 along its length direction, consisting of multiple protrusions 31, and each protrusion 31 of the concave-convex structure 30 has multiple micro-protrusions 40 on its surface.

[0092] like Figures 7 to 10 As shown, the cutting tool includes a tool body 10 and a hard layer 20. The hard layer 20 is a mixed structure of large and small particles (such as large particles forming a skeleton and small particles filling the gaps between large particles), formed at the lower end 14 of the tool body 10 in the height direction, serving as the cutting edge 51 of the tool. The lower end of the hard layer 20 is arranged with concave and convex shapes, so that the cutting edge 51 of the tool has a concave-convex structure 30 composed of multiple protrusions 31 along the length direction, and the surface of each protrusion 31 of the concave-convex structure 30 has multiple micro-protrusions 40.

[0093] like Figures 11 to 14 As shown, the cutting tool includes a tool body 10 and a hard layer 20. The hard layer 20 has a structure of sequentially stacked particles of different sizes. The hard layer 20 is formed at the lower end 14 of the tool body 10 in the height direction, serving as the cutting edge 51 of the tool. The lower end of the hard layer 20 is arranged with concave and convex shapes, so that the cutting edge 51 of the tool has a concave-convex structure 30 composed of multiple protrusions 31 along the length direction, and the surface of each protrusion 31 of the concave-convex structure 30 has multiple micro-protrusions 40.

[0094] Both of these specific structural forms enable the cutting edge 51 of the tool to have a multi-stage tooth structure, thereby ensuring the tool's long-lasting sharpness.

[0095] In a second embodiment of this utility model, a method for manufacturing a cutting tool is provided. The method includes: providing a cutting tool body 10 with a curved lower end 14; then spraying a hard layer 20 onto the lower end 14 of the cutting tool body using a hard material; subsequently grinding the hard layer and using the remaining hard layer as the cutting edge of the tool. The hard material includes a mixture of alloy particles 21 with a first particle size R1 and alloy particles 22 with a second particle size R2, or a mixture of alloy particles 21 with a first particle size R1, alloy particles 22 with a second particle size R2, and non-metallic ceramic particles. Here, R1≤R3≤R2, so that particles of different sizes can be sprayed to form a hard layer 20 that easily constructs the concave-convex structure 30 of the cutting edge 51.

[0096] Furthermore, it should be noted that this utility model does not limit the manufacturing method of the tool. It is understood that those skilled in the art can also use methods known to them to form the tool according to this utility model. For example, as another method of manufacturing the tool, an uneven structure layer can be formed by first spraying alloy particles 21 with a first particle size R1, and then an even finer particle layer can be formed by spraying alloy particles 22 with a second particle size R2 or non-metallic ceramic particles on the uneven structure layer. The hard layer with a layered structure obtained in this way can be used to construct the cutting edge 51 of the tool with a multi-level tooth structure of this utility model through the structure of the hard layer (surface structure and internal structure) and with the help of a certain grinding process.

[0097] Furthermore, it should be noted that in some embodiments of this utility model, the concave-convex structure layer can also be machined on the tool substrate using methods such as laser engraving, mechanical stamping, or chemical etching to form a primary concave-convex contour 30. Alternatively, it can be formed by spraying large-sized particles to create the primary concave-convex contour (concave-convex structure 30) according to this utility model. Then, multiple micro-protrusions are machined on the surface of each convex bump of the primary concave-convex contour by spraying, thereby forming a cutting tool with a multi-level toothed structure according to this utility model.

[0098] According to this utility model, the knife also includes a handle, which is connected to one side of the knife body 10 along its length, making it convenient for the user to hold the knife during use.

[0099] While the embodiments of the present invention have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope thereof. However, it should be understood that, in the view of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.

Claims

1. A cutting tool, characterized by The cutting edge (51) of the cutting tool has a concave-convex structure (30) extending along the length direction, and the surface of the concave-convex structure (30) has a plurality of micro protrusions (40). The cutting tool includes a cutting tool body (10) and a hard layer (20) formed on the cutting tool body (10). The hard layer (20) forms the concave-convex structure (30) and the micro protrusions (40).

2. The tool according to claim 1, characterized in that The concave-convex structure (30) includes a plurality of protrusions (31) and grooves (32) located between adjacent protrusions (31), and the micro-protrusions (40) are formed on the surface of the protrusions (31) and / or the grooves (32).

3. The tool according to claim 2, characterized in that The width W1 of the convex hull (31) is 50 micrometers to 300 micrometers; and / or, The width W2 of the groove (32) is 50 micrometers to 300 micrometers, and the depth H2 of the groove (32) is 25 micrometers to 150 micrometers; and / or, The width of the micro-protrusions (40) is 10-50 micrometers, and the spacing between the micro-protrusions (40) is less than or equal to 50 micrometers; and / or, The height H1 of the convex hull (31) is 25 micrometers to 150 micrometers, and the height of the micro protrusion (40) is 5 micrometers to 25 micrometers.

4. The tool according to any one of claims 1 to 2, characterized in that The hardness of the hard layer (20) is greater than that of the tool body (10). The Vickers hardness of the tool body (10) is 200HV-700HV, and the Vickers hardness of the hard layer (20) is 500HV-2500HV.

5. The tool of claim 4 wherein, The hard layer (20) is an alloy particle layer, which includes alloy particles (21) with a first particle size R1 and alloy particles (22) with a second particle size R2, wherein 25 micrometers ≤ R1 < 150 micrometers, 5 micrometers ≤ R2 ≤ 25 micrometers, and R1 is greater than R2.

6. The cutting tool according to claim 4, characterized in that, The hard layer (20) is formed by one of the following methods: arc spraying, flame spraying, plasma spraying, high-speed oxygen fuel spraying, cold spraying, laser cladding, plasma cladding and electron beam melting.

7. The cutting tool according to claim 5, characterized in that, The particle size difference between the alloy particles (21) with the first particle size R1 and the alloy particles (22) with the second particle size R2 is greater than or equal to 20 micrometers; and / or, The ratio of the number of alloy particles (21) with the first particle size R1 to the number of alloy particles (22) with the second particle size R2 is 1:(5-50).

8. The cutting tool according to claim 5, characterized in that, Non-metallic ceramic particles are also dispersed in the alloy particle layer.

9. The cutting tool according to claim 8, characterized in that, The non-metallic ceramic particles have a particle size of R3, wherein 10 micrometers ≤ R3 ≤ 50 micrometers, and R1 ≤ R3 ≤ R2; and / or, the non-metallic ceramic particles are embedded on alloy particles (21) with the first particle size R1; and / or, the non-metallic ceramic particles include one of titanium carbide particles, titanium nitride particles, titanium carbonitride particles, titanium aluminum nitride particles, tungsten carbide particles, tungsten dicarbide particles, alumina particles, zirconium dioxide particles, silicon carbide particles, boron carbide particles, tantalum carbide particles, niobium carbide particles, silicon nitride particles, cubic boron nitride particles, aluminum nitride particles, titanium diboride particles, and zirconium diboride particles; and / or, the alloy particle layer includes one of stainless steel particle layer, tool steel alloy particle layer, titanium alloy particle layer, chromium alloy particle layer, nickel alloy particle layer, and cobalt alloy particle layer.

10. The cutting tool according to claim 4, characterized in that, The average thickness of the hard layer (20) is 1 micrometer to 10 micrometers.

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