Cutter

Abstract

The utility model provides a cutter. The cutter comprises a cutter body and a hard layer, and the cutter body comprises a cutting edge area formed by a first inclined face and a second inclined face which intersect in the thickness direction of the cutter body; the hard layer is formed on the first inclined surface of the cutting edge area and extends to the end position of the cutting edge area or extends out of the end position of the cutting edge area, so that a cutting edge part of the cutter is formed; the hardness of the hard layer is larger than that of the cutter body. According to the cutter disclosed by the utility model, the cutting edge part of the cutter with proper hardness can be obtained through the cutter body and the hard layer, so that the cutter with the cutting edge part has good and lasting sharpness.

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 tool includes a cutting tool body and a hardened layer, the cutting tool body includes a cutting edge region formed by a first inclined surface and a second inclined surface intersecting in its thickness direction; the hardened layer is formed on the first inclined surface of the cutting edge region and extends to or beyond the end position of the cutting edge region, thereby forming the cutting edge portion of the cutting tool; wherein the hardness of the hardened layer is greater than the hardness of the cutting tool body.

[0005] According to the present invention, the knife body includes a cutting edge region formed by a first inclined plane and a second inclined plane intersecting in the thickness direction. The hardness of the hard layer is greater than that of the knife body. By forming a hard layer on the first inclined plane of the cutting edge region and extending the hard layer to or beyond the end position of the cutting edge region, the hard layer together with the knife body constitutes the cutting edge of the knife. In this way, a cutting edge with suitable hardness can be obtained by constructing the knife body and the hard layer, thereby enabling the knife with such a cutting edge to have good and lasting sharpness.

[0006] In some embodiments, the angle between the first inclined plane and the height direction of the tool is α, and the angle between the second inclined plane and the height direction of the tool is β, wherein α is less than or equal to β. By setting the angle between the first inclined plane and the height direction of the tool to be less than or equal to the angle between the second inclined plane and the height direction of the tool, a cutting edge portion of a tool with a suitable blade sheath angle can be constructed, thereby further improving the tool's long-lasting sharpness. Furthermore, after forming a hard layer on the first inclined plane, it ensures that the structural symmetry of the cutting edge portion of the manufactured tool in the thickness direction is not excessively affected, facilitating the tool's ease of use and operation, thereby enhancing the user experience.

[0007] In some embodiments, α is 10°-15°, β is 15°-20°, and α is 3°-8° smaller than β. In this way, the cutting edge of the knife with a suitable blade angle can be obtained by constructing a specific angle, thereby further improving the knife's lasting sharpness and user experience.

[0008] In some embodiments, the Vickers hardness of the tool body is 200HV-700HV, and the Vickers hardness of the hard layer is 500HV-2500HV. Thus, by specifying the hardness of the tool body and the hard layer, a cutting edge with suitable hardness can be constructed, thereby further improving the tool's long-lasting sharpness.

[0009] In some embodiments, the Vickers hardness difference between the tool body and the hard layer is greater than or equal to 20 HV. By setting a suitable hardness difference between the tool body and the hard layer, a cutting edge with a suitable hardness can be constructed, thereby further improving the tool's long-lasting sharpness.

[0010] According to the present invention, the surface and internal structure of the hard layer can continuously form a serrated structure on the cutting edge of the knife after subsequent grinding. In this way, the serrated structure makes it easier for the cutting edge to cut into food, thereby further improving the sharpness of the knife.

[0011] More specifically, the serrated structure includes a concave-convex structure extending along the length of the blade, and the surface of the concave-convex structure has multiple micro-protrusions. In other words, the blade of this invention has a multi-level toothed structure. Thus, due to the multi-level toothed structure of the blade, with the assistance of the concave-convex structure, the micro-protrusions can more easily cut into the food, thereby ensuring the good and lasting sharpness of the blade.

[0012] In some embodiments, the width W1 of the convex bulge is 50 micrometers to 300 micrometers, and the height H1 of the convex bulge is 25 micrometers to 150 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, the height is 5 micrometers to 25 micrometers, and the spacing between the micro-protrusions is less than or equal to 50 micrometers.

[0013] 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.

[0014] 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.

[0015] In these embodiments, a hard layer is formed by alloy particles of different sizes, and this hard layer forms part of the cutting edge of the tool, thereby ensuring the long-lasting sharpness of the cutting edge of the tool by utilizing the hardness of the hard layer.

[0016] 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.

[0017] In these embodiments, the alloy particles possess 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 particles also possess a certain degree of toughness, ensuring the bonding force between the hardened layer and the tool body, making the hardened layer less prone to detachment during use and preventing chipping, thus guaranteeing a long-lasting sharpness for the tool.

[0018] 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-size alloy particles) to form a hard layer, paving the way for a cutting edge with a serrated structure, which is beneficial for further improving the sharpness of the tool.

[0019] 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 is 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 making it more conducive to forming the serrated cutting edge according to the present invention, thereby improving the sharpness of the tool.

[0020] In some embodiments, the alloy particle layer further contains dispersed hard particles, the hardness of which is greater than that of the individual alloy particles. Thus, the hard particles in the hard layer, due to their greater hardness, increase the strength of the cutting edge, making it less prone to chipping and wear, thereby resulting in a tool with further enhanced and lasting sharpness.

[0021] In some embodiments, the particle size of the hard particles is R3, where 10 micrometers ≤ R3 ≤ 50 micrometers, and R1 ≤ R3 ≤ R2. If the particle size of the hard particles is too large, it will make cutting uneven and affect the cutting experience; if the particle size of the hard particles is too small, the improvement in sharpness will not be significant. Hard particles of appropriate size, as part of the hard layer, can improve the sharpness of the tool while ensuring the cutting experience.

[0022] In some embodiments, the hard particles include one of 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 serrated cutting edge during use and avoiding the inconvenience of frequent sharpening.

[0023] 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

[0024] 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:

[0025] Figure 1 This is a right-side structural schematic diagram of the cutting tool according to the first embodiment of the present utility model;

[0026] Figure 2 This is a left-side view of the cutting tool according to the first embodiment of the present invention;

[0027] Figure 3 yes Figure 1 AA of the cutting tools ‘ Schematic diagram of the cross-sectional structure at the location;

[0028] Figure 4 This is a schematic diagram of the cross-sectional structure of the cutting tool according to the second embodiment of this utility model;

[0029] Figure 5 yes Figure 1 Enlarged structural diagram at point I;

[0030] Figure 6 This is a structural schematic diagram of the manufacturing process of the cutting tool according to an embodiment of the present utility model.

[0031] Tag name

[0032] 10. Tool body; 11. First bevel; 12. Second bevel; 13. End position; 20. Hardened 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. Hardened coating layer; 70. Back of the tool. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] The following will combine Figures 1 to 6 The present invention will now be described in the form of a cutting tool provided in an embodiment of this utility model.

[0043] A cutting tool is provided according to an embodiment of the present invention. Wherein, as... Figures 1 to 5 As shown, the cutting tool includes a cutting tool body 10, which includes a cutting edge region formed by a first inclined surface 11 and a second inclined surface 12 intersecting in the thickness direction. A hard layer 20 is formed on the first inclined surface 11 of the cutting edge region, extending to the end position 13 of the cutting edge region or extending beyond the end position 13 of the cutting edge region (here, the end position 13 of the cutting edge region is the intersection of the first inclined surface 11 and the second inclined surface 12 of the cutting tool body 10), thereby forming the cutting edge portion 50 of the cutting tool. The hardness of the hard layer 20 is greater than the hardness of the cutting tool body 10.

[0044] According to the present invention, the knife body 10 includes a cutting edge region formed by a first inclined surface 11 and a second inclined surface 12 intersecting in the thickness direction. The hardness of the hard layer 20 is greater than that of the knife body 10. By forming a hard layer on the first inclined surface 11 of the cutting edge region and extending the hard layer 20 to the end position 13 of the cutting edge region or extending beyond the end position 13 of the cutting edge region, the hard layer 20 together with the knife body 10 constitutes the cutting edge portion 50 of the knife. In this way, the cutting edge portion 50 of the knife with suitable hardness can be obtained by constructing the knife body 10 and the hard layer 20, thereby enabling the knife with such a cutting edge portion 50 to have good and lasting sharpness.

[0045] 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.

[0046] like Figure 3As shown, the portion of the tool body 10 connected to the hard layer 20 includes a first inclined surface 11 and a second inclined surface 12 opposite each other in its thickness direction. The first inclined surface 11 and the second inclined surface 12 extend obliquely relative to the height direction of the tool body 10, thereby intersecting obliquely. The angle between the first inclined surface 11 and the height direction of the tool is α, and the angle between the second inclined 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 inclined surface 11 and extends beyond the intersection of the first inclined surface 11 and the second inclined surface 12.

[0047] like Figure 4 As shown, the portion of the tool body 10 connected to the hard layer 20 includes a first inclined surface 11 and a second inclined surface 12 opposite each other in its thickness direction. The first inclined surface 11 and the second inclined surface 12 extend obliquely relative to the height direction of the tool body 10, thereby intersecting obliquely. The angle between the first inclined surface 11 and the height direction of the tool is α, and the angle between the second inclined 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 inclined surface 11 and extends to intersect with the end position 13 of the tool body 10.

[0048] Both of these structural forms can form part of the cutting edge 51 of the cutting edge 50 of the tool by means of a hard layer, thereby ensuring the long-lasting sharpness of the cutting edge 51 of the tool by means of the hardness of the hard layer.

[0049] In some embodiments, the angle between the first inclined surface 11 and the height direction of the tool is α, and the angle between the second inclined surface 12 and the height direction of the tool is β, wherein α is less than or equal to β. By setting the angle between the first inclined surface 11 and the height direction of the tool to be less than or equal to the angle between the second inclined surface 12 and the height direction of the tool, a cutting edge 50 with a suitable blade angle can be constructed, thereby further improving the tool's long-lasting sharpness. Furthermore, after forming a hard layer 20 on the first inclined surface 11, it is ensured that the symmetry of the structure of the cutting edge 50 of the manufactured tool in the thickness direction is not excessively affected, which facilitates the convenience of using and operating the tool, thereby improving the user experience.

[0050] As an example, α is 10°-15°, β is 15°-20°, and α is 3°-8° smaller than β. The first inclined plane 11 and the second inclined plane 12 are inclined planes. In this way, the cutting edge 50 of the knife with a suitable blade angle can be obtained by constructing a specific angle, thereby further improving the knife's lasting sharpness and user experience.

[0051] In this invention, the hardness of the hard layer 20 is greater than the hardness of the tool body 10. For 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 with suitable hardness can be constructed, thereby further improving the tool's sustained 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 with suitable hardness can be constructed, thereby further improving the tool's sustained sharpness.

[0052] In this invention, the cutting edge 50 of the tool can be constructed by a hard layer 20. Furthermore, the distribution pattern of the hard layer 20 can be used to obtain a tool with a serrated cutting edge 51.

[0053] In some embodiments, the lower end of the hard layer 20 is arranged with concave and convex surfaces, so that the cutting edge 51 of the cutting edge portion 50 has a serrated structure. Here, the serrated structure can be a micro-serrated structure (where the teeth can be arranged unevenly in the width direction of the knife) or a multi-level toothed structure. In this way, the serrated structure makes it easier for the cutting edge to cut into the food, thereby further improving the sharpness of the knife.

[0054] The structure of the cutting tool with a multi-stage tooth structure according to this utility model will be described in detail below.

[0055] In a specific embodiment, the serrated structure is a multi-level toothed structure, specifically including a concave-convex structure 30 extending along the length direction of the blade, and the surface of the concave-convex structure 30 has multiple micro-protrusions 40. In other words, the cutting edge 51 of the blade of this invention has a multi-level toothed structure. Thus, because the cutting edge 51 has a multi-level toothed structure, with the assistance of the concave-convex structure 30, the micro-protrusions 40 can more easily cut into the food, thereby ensuring the good and lasting sharpness of the blade.

[0056] In this utility model, such as Figure 1 and Figure 5As 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.

[0057] In this invention, the cutting edge 51 of the knife includes a concave-convex structure 30 and a plurality of 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 kind of knife exerts greater pressure than existing conventional knives under the same applied force, thus making it easier to cut into food, maintaining its sharpness for a longer period, and improving cutting efficiency.

[0058] 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.

[0059] In these embodiments, the micro-protrusions 40 located at the convex 31 are more prominent, making it easier to cut into food. The concave-convex structure 30 can withstand the impact force during cutting and can at least protect the micro-protrusions 40 located in the groove 32, reducing their deformation due to uneven force and ensuring the long-term sharpness of the knife during use. Furthermore, even if the micro-protrusions 40 located at the convex 31 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 convex 31 wear down, the knife can still use a portion of the micro-protrusions 40 located in the groove 32 for cutting, thereby improving the long-term sharpness of the knife.

[0060] 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.

[0061] 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.

[0062] According to the cutting tool of this utility model, the hard layer 20 is an alloy particle layer, specifically formed by spraying and polishing alloy particles of different sizes. Particles of different sizes can be close to each other, even stacked, or they can be spaced apart, but the maximum distance does not exceed 200 micrometers, thus forming the hard layer 20 through layering.

[0063] 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 R1 is greater than R2, 25 micrometers ≤ R1 < 150 micrometers, and 5 micrometers ≤ R2 ≤ 25 micrometers. Spraying the alloy particles 21 with the first particle size R1 and the alloy particles 22 with the second particle size R2 can constitute the hard layer 20 of this invention. 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 the particle size shown as D50 (median particle size).

[0064] More specifically, 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.

[0065] 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 51 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 serrated cutting edge 51 according to this invention, thereby improving the sharpness of the tool.

[0066] In these embodiments, the hard layer 20 formed by spraying alloy particles 22 of different sizes can enhance the sharpness of the tool after grinding due to its structure (internal structure and surface structure).

[0067] 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, specifically including one of stainless steel particles, tool steel alloy particles, titanium alloy particles, chromium alloy particles, nickel alloy particles, and cobalt alloy particles. The alloy particles have good hardness and wear resistance, which can ensure the hardness and wear resistance of the hard layer, thereby obtaining a long-lasting sharp cutting edge 51. In addition, the alloy particles also have a certain degree of toughness, which can ensure the bonding force between the hard layer 20 and the tool body 10, so that the hard layer 20 is not easy to fall off during use and can avoid chipping, thereby ensuring the long-lasting sharpness of the tool. As a specific example, the tool steel alloy particles are alloy particles based on iron (Fe) with added alloying elements such as carbon (C), tungsten (W), molybdenum (Mo), and vanadium (V), which are also existing materials.

[0068] In some embodiments, the hard layer 20 is a sprayed layer formed from alloy particles using 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 on their surface, forming a hard layer with a rough surface structure, which is beneficial for improving the sharpness of the cutting tool through surface grinding. Correspondingly, the hard layer 20 of this utility model specifically includes an arc-sprayed stainless steel layer, a flame-sprayed stainless steel layer, a plasma-sprayed stainless steel layer, a high-speed oxygen fuel-sprayed stainless steel layer, a cold-sprayed stainless steel layer, a laser-clad stainless steel layer, a plasma-clad stainless steel layer, an electron beam-melted stainless steel layer, an arc-sprayed nickel-molybdenum alloy layer, a flame-sprayed nickel-molybdenum alloy layer, a plasma-sprayed nickel-molybdenum alloy layer, a high-speed oxygen fuel-sprayed nickel-molybdenum alloy layer, a cold-sprayed nickel-molybdenum alloy layer, a laser-clad nickel-molybdenum alloy layer, a plasma-clad nickel-molybdenum alloy layer, an electron beam-melted nickel-molybdenum alloy layer, an arc-sprayed tool steel alloy layer, a flame-sprayed tool steel alloy layer, a plasma-sprayed tool steel alloy layer, a high-speed oxygen fuel-sprayed tool steel alloy layer, a cold-sprayed tool steel alloy layer, a laser-clad tool steel alloy layer, and a 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.

[0069] 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.

[0070] In some embodiments, hard particles are also dispersed in the alloy particle layer, and the hardness of the hard particles is greater than that of each hard layer 20. Thus, the hard layer 20 containing the hard particles can have increased hardness, thereby increasing the strength of the cutting edge 50, making it less prone to chipping and wear, and thus obtaining a tool with further improved durability and sharpness. Continuing with the example above, the hard particles are dispersed in the alloy particle layer, specifically embedded in the alloy particles 21 with a first particle size R1. Thus, the hard particles in the hard layer 20 and the alloy particles 22 with a second particle size R2 can have good bonding, thereby improving durability and sharpness.

[0071] In some embodiments, the particle size of the hard particles is R3, where R1≤R3≤R2, and 10 micrometers≤R3≤50 micrometers. If the particle size of the hard particles is too large, it will make cutting uneven and affect the cutting experience; if the particle size of the hard particles is too small, the improvement in sharpness will not be significant. Hard particles of appropriate size, as part of the hard layer 20, can improve the sharpness of the tool while ensuring the cutting experience.

[0072] In some embodiments, the hard particles are existing materials, specifically non-metallic ceramic particles, which specifically include one of the following: 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.

[0073] In these embodiments, the non-metallic compound used for the cutting tool has suitable hardness and wear resistance, which makes the cutting edge of the formed tool more wear-resistant, thereby ensuring the long-lasting sharpness of the cutting edge 51 during use and avoiding the trouble of frequent sharpening.

[0074] In this invention, a portion of the alloy particles 22 with a second particle size R2 and a portion of the hard particles are dispersed on the surface of the hard layer 20 to form micro-protrusions 40. Thus, the tool possesses suitable hardness in the initial stages of use, thereby achieving good sharpness. In some embodiments, the hard particles are also dispersed within the hard layer 20. During subsequent sharpening processes, the hard particles may be exposed and serve as micro-protrusions 40 after sharpening, thereby ensuring the tool's long-lasting sharpness.

[0075] 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.

[0076] In the first embodiment of this utility model, the tool body 10 includes a cutting edge region formed by a first inclined surface 11 and a second inclined surface 12 intersecting in the thickness direction. This cutting edge region is generally inverted conical in shape and can be referred to as an inverted conical cutting edge region. Figure 3 As shown, a hard layer 20 is formed on the first inclined surface 11 of the cutting edge region of the tool body 10 and extends beyond the end position 13 of the tool body 10, thereby forming the cutting edge portion 50 of the tool together with the tool body 10. The lower end of this cutting edge portion 50 serves as the cutting edge 51 in one embodiment of this utility model. Figure 4 As shown, a hard layer 20 is formed on the first inclined surface 11 of the cutting edge region of the tool body 10 and extends to intersect with the end position 13 of the tool body 10, thereby forming the cutting edge portion 50 of the tool together with the tool body 10. The lower end of the cutting edge portion 50 serves as the cutting edge 51 of another embodiment of the present invention.

[0077] For the two structural forms mentioned above, the corresponding manufacturing methods for the cutting tools include the following specific steps.

[0078] (1) Prepare the initial blade blank.

[0079] 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.

[0080] (2) Pre-processing stage.

[0081] 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.

[0082] Degreasing: Removing grease from the surface of the initial blade blank using chemical or physical methods.

[0083] Rust removal: Removes rust and other impurities from the surface of the initial blade blank to improve the adhesion of the hard layer.

[0084] (3) The first main surface after pretreatment is obliquely ground to form a tool base with an inclined surface.

[0085] 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 a 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.

[0086] (4) A hard coating layer 60 is formed by spraying alloy particles onto the tool substrate with an inclined surface.

[0087] (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 inclined surface 11 of the tool body, and the other surface opposite to the inclined surface, after grinding, corresponds to the second inclined surface 12 of the tool body.

[0088] 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.

[0089] 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 a cutting tool with a hard coating 60 is shown. (Refer to...) Figure 3 and 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.

[0090] 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.

[0091] 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. As an example, another tool manufacturing method is provided, in which an uneven structure layer is first formed by spraying alloy particles 21 with a first particle size R1 onto the tool substrate, and then an even finer particle layer is formed by spraying alloy particles 22 with a second particle size R2 or hard particles onto 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.

[0092] 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 tool includes: The tool body (10) includes a cutting edge region formed by a first inclined surface (11) and a second inclined surface (12) intersecting in its thickness direction; A hard layer (20) is formed on the first inclined surface (11) of the cutting edge region, extending to the end position (13) of the cutting edge region or extending beyond the end position (13) of the cutting edge region, thereby forming the cutting edge portion (50) of the tool. The hardness of the hard layer (20) is greater than that of the tool body (10).

2. The knife of claim 1, wherein, The first inclined plane (11) has an angle of α with respect to the height direction of the tool, and the second inclined plane (12) has an angle of β with respect to the height direction of the tool, wherein α is less than or equal to β.

3. The tool according to claim 2, characterized in that α is 10°-15°, β is 15°-20°, and α is 3°-8° smaller than β.

4. The knife of claim 1, wherein, 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 knife of claim 1, wherein, The difference in Vickers hardness between the tool body (10) and the hard layer (20) is greater than or equal to 20 HV.

6. The knife of claim 1, wherein, The hard layer (20) is an alloy particle layer, wherein 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.

7. The tool of claim 6 wherein, The alloy particles include one of the following: 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; and / or, 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 knife of claim 6, wherein, The alloy particle layer also contains dispersed hard particles, the hardness of which is greater than that of each alloy particle.

9. The tool of claim 8 wherein, The particle size of the hard particles is R3, wherein 10 micrometers ≤ R3 ≤ 50 micrometers, and R1 ≤ R3 ≤ R2; and / or, The hard particles include one of the following: 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.

10. The tool according to any one of claims 1 to 9, characterized in that The cutting edge (51) of the cutting edge portion (50) is formed with a serrated structure, the serrated structure including 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).

11. The tool according to claim 10, 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).

12. The tool of claim 11 wherein, 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.

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