Extremely sharp cutter and manufacturing method thereof

Abstract

The extremely sharp cutter comprises a cutter body base material with a cutting edge part, the surfaces of the two sides of the cutting edge part are a first cutting edge face and a second cutting edge face respectively, a high-hardness film layer is attached to the first cutting edge face or the second cutting edge face, or film layers are attached to the first cutting edge face and the second cutting edge face. The invention further discloses a manufacturing method of the extremely sharp cutter. The sharpness and lasting sharpness of the cutting tool are greatly improved.

Description

Technical Field

[0001] The present invention relates to an extremely sharp cutting tool and a manufacturing method thereof. Background Art

[0002] Currently, for cutting tools such as kitchen or outdoor knives, fish knives, daggers, etc. on the market, the edge opening generally has a conventional included angle of 35°, and the edge surface has a sanded effect. Generally, the sanding belt or grinding wheel with a mesh number of 240# or 320# is used for edge opening, which can meet the basic cutting function. However, the obvious defect is that with the conventional sanded edge surface and an edge opening with an included angle of about 35°, the initial sharpness and lasting sharpness (retention) of the product are not good.

[0003] Therefore, an extremely sharp cutting tool and a manufacturing method thereof are provided. Summary of the Invention

[0004] The purpose of the present invention is to overcome the existing defects and provide an extremely sharp cutting tool and a manufacturing method thereof, which greatly improve the sharpness and lasting sharpness of the cutting tool.

[0005] The technical solution to achieve the above purpose is as follows: An extremely sharp cutting tool according to one aspect of the present invention includes: a tool body substrate having an edge portion, the surfaces on both sides of the edge portion are respectively a first edge surface and a second edge surface, and a film layer is attached to the first edge surface or the second edge surface, or film layers are attached to both the first edge surface and the second edge surface.

[0006] Preferably, the film layer is attached to the first edge surface or the second edge surface, or both the first edge surface and the second edge surface by PVD (Physical Vapor Deposition), CVD (Chemical Vapor Deposition), or PECVD (Plasma Enhanced Chemical Vapor Deposition) process.

[0007] A manufacturing method of an extremely sharp cutting tool according to another aspect of the present invention includes: Step S1: Select a tool body substrate with a rectangular cross-sectional shape, and the tool body substrate is a conductive metal material; Step S2: Grind the first edge surface or grind out two edge surfaces, and attach a film layer to the first edge surface or both edge surfaces by PVD (Physical Vapor Deposition), CVD (Chemical Vapor Deposition), or PECVD (Plasma Enhanced Chemical Vapor Deposition) process; Step S3: Then grind the tool body substrate into a trapezoidal cross-section or other shaped cross-section to form a tool surface according to the conventional cutting tool manufacturing method; Step S4: After grinding the tool surface, on this basis, select whether to perform selective PVD (Physical Vapor Deposition), painting, blackening, etching, laser texturing, stone washing, or sandblasting surface treatment on the tool surface; Step S5, grinding the blade surface of the blade body substrate with one blade surface to obtain another blade surface, and for the blade body substrate with two blade surfaces, re-grinding one blade surface or not re-grinding the blade surface, and grinding the blade surface on the other blade surface of the blade body substrate with the small inclined surface, small concave surface or small convex surface after the original grinding as the final blade surface; Step S6, finally, the blade substrate with the blade surface ground can be selectively coated with other materials to produce an extremely sharp tool.

[0008] Preferably, in step S1, the conductive metal material is one of, including but not limited to, martensitic stainless steel, austenitic stainless steel, ferritic stainless steel, titanium alloy, carbon steel, tungsten steel, duplex stainless steel, die steel, high-speed steel or heat-resistant steel; In the step S2, the blade substrates are bundled and loaded into a furnace in a manner of arranging the blade edges outward, or a single blade is loaded into a furnace in a manner of arranging the blade edges outward in a ring, and then the coating is performed; In the step S2, if only one blade face is selected to have a film layer, it is preferred to first form a single blade face for coating, and then process another blade face on the other blade face to form a final blade edge shape; In the step S2, a blade body made of other materials can be welded on the blade body substrate after the first blade surface is ground or the two blade surfaces are ground, or the blade body can be welded after the film layer process is completed on the blade surface, and the blade body material is a conductive metal material, such as one of martensitic stainless steel, titanium alloy, carbon steel, austenitic stainless steel, ferritic stainless steel, duplex stainless steel, die steel, high-speed steel or heat-resistant steel; In the step S2, the film layer includes but is not limited to the wear-resistant layer of ta-C (tetrahedral amorphous carbon / diamond-like carbon film), CrwC (tungsten chromium carbide), TiSiN (silicon titanium nitride), TiAlSiXN (aluminum silicon titanium nitride), AlCrN (aluminum chromium nitride), Ti (titanium), TiB2 (titanium diboride), TiN (titanium nitride), CrN (chromium nitride), DLC (diamond-like coating), ADLC (amorphous diamond-like carbon), ZrN (zirconium nitride), ZrCN (zirconium carbonitride), TiN-TiCN-TiN (titanium nitride-titanium carbonitride-titanium nitride multilayer film), TiCN-TiC-TiN (titanium carbonitride-titanium carbide-titanium nitride ... One of CrAlBN (boron aluminum chromium nitride), TiAlN (aluminum titanium nitride), CrAlSiN (silicon aluminum chromium nitride), TiSiC (silicon titanium carbide), TiC (titanium carbide), CrNC (chromium carbonitride); Among them, the hardness of the wear-resistant layer is higher than that of the base material of the cutter body; In step S3, the blade grinding method includes but is not limited to: The surface is roughened with a magnesia grinding wheel and polished with a rubber wheel; Resin grinding wheel for rough grinding and rubber wheel for polishing the surface; The resin grinding wheel directly grinds the surface; CBN grinding wheel grinding surface; Polish the surface with a belt sander or a clamping machine; On the basis of grinding and polishing, nylon wheels, sanding belts or cloth wheels can be added to polish the surface; In step S5, the cross-sectional shape of the cutting edge includes but is not limited to: a symmetrical V-shaped edge, an asymmetrical V-shaped edge, a U-shaped edge, a hard edge, or a hard edge on one side plus a V-shaped edge on the other side; the cutting edge angle range is: 6°-60°, the single-sided cutting angle is: 1°-59°; the cutting edge thickness range is: 0.1mm-1.2mm; In step S5, after the blade surface is ground, the blade tip is deburred, and the treatment methods include but are not limited to: a thousand-leaf leather wheel or a soft leather wheel with polishing wax, a cloth wheel with polishing wax, a wool wheel with polishing wax, a cloth and linen wheel with polishing wax, a swinging cloth, dry ice, liquid nitrogen or electrolytic polishing; In step S6, the final tool surface includes but is not limited to laser light surface, brushed surface, sanded surface, mirror surface, subsequently added PVD (physical vapor deposition) coating surface, PECVD (plasma enhanced chemical vapor deposition) coating surface, CVD (chemical vapor deposition) coating surface, selectively added painting, blackening, etching, laser texturing or stone washing, sandblasting surface or a combination thereof.

[0009] The third method of the present invention is a method for making an extremely sharp knife, comprising: Step T1, selecting a blade substrate with a rectangular cross-section, grinding the blade substrate into a trapezoidal cross-section or other cross-section according to a conventional tool manufacturing method to form a blade surface; the blade substrate is a conductive metal material; Step T2, selecting to first open a single-sided cutting edge, a double-sided cutting edge, or one of the cutting edges as the final cutting edge, and attaching a film layer to the surface of the cutting body substrate and the first cutting edge or both cutting edges by PVD (physical vapor deposition), CVD (chemical vapor deposition), or PECVD (plasma enhanced chemical vapor deposition) process; Step T3, on this basis, choose whether to selectively add PVD (physical vapor deposition), painting, blackening, etching, laser texturing, stone washing or sandblasting surface processing to the blade surface; Step T4, grinding the other blade surface of the blade body substrate with one blade surface, re-grinding one blade surface or not re-grinding the blade surface of the blade body substrate with the blade surface after the original grinding as the final blade surface, grinding the blade surface on the other blade surface; Step T5, finally, the blade substrate with the ground cutting edge can be selectively coated with other materials to produce an extremely sharp tool.

[0010] Preferably, in step T1, the conductive metal material is one of, including but not limited to, martensitic stainless steel, austenitic stainless steel, ferritic stainless steel, titanium alloy, carbon steel, tungsten steel, duplex stainless steel, die steel, high-speed steel or heat-resistant steel; In step T1, the blade grinding method includes but is not limited to: The surface is roughened with a magnesia grinding wheel and polished with a rubber wheel; Resin grinding wheel for rough grinding and rubber wheel for polishing the surface; The resin grinding wheel directly grinds the surface; CBN grinding wheel grinding surface; Polish the surface with a belt sander or a clamping machine; On the basis of grinding and polishing, nylon wheels, sanding belts or cloth wheels can be added to polish the surface; In the step T2, the furnace is loaded by a single hanging arrangement to perform coating; In the step T2, the film layer includes but is not limited to the wear-resistant layer of ta-C (tetrahedral amorphous carbon / diamond-like carbon film), CrwC (tungsten chromium carbide), TiSiN (silicon titanium nitride), TiAlSiXN (aluminum silicon titanium nitride), AlCrN (aluminum chromium nitride), Ti (titanium), TiB2 (titanium diboride), TiN (titanium nitride), CrN (chromium nitride), DLC (diamond-like coating), ADLC (amorphous diamond-like carbon), ZrN (zirconium nitride), ZrCN (zirconium carbonitride), TiN-TiCN-TiN (titanium nitride-titanium carbonitride-titanium nitride multilayer film), TiCN-TiC-TiN (titanium carbonitride-titanium carbide-titanium nitride ... One of CrAlBN (boron aluminum chromium nitride), TiAlN (aluminum titanium nitride), CrAlSiN (silicon aluminum chromium nitride), TiSiC (silicon titanium carbide), TiC (titanium carbide), CrNC (chromium carbonitride); Among them, the hardness of the wear-resistant layer is higher than that of the base material of the cutter body; In step T4, the cross-sectional shape of the cutting edge includes but is not limited to: a symmetrical V-shaped edge, an asymmetrical V-shaped edge, a U-shaped edge, a hard edge, or a hard edge on one side plus a V-shaped edge on the other side; the cutting edge angle range is: 6°-60°, the single-sided cutting angle is: 1°-59°; the cutting edge thickness range is: 0.1mm-1.2mm; In step T4, after the blade surface is ground, the blade tip is deburred, and the treatment methods include but are not limited to: a thousand-leaf leather wheel or a soft leather wheel with polishing wax, a cloth wheel with polishing wax, a cloth and linen wheel with polishing wax, a wool wheel with polishing wax, a swinging cloth, dry ice, liquid nitrogen or electrolytic polishing; In the step T5, the surface of the finally manufactured tool is one or a combination of, but not limited to, a laser light surface, a brushed surface, a sanded surface, a mirror finish surface, a subsequently added PVD (Physical Vapor Deposition) coating surface, a PECVD (Plasma Enhanced Chemical Vapor Deposition) coating surface, a CVD (Chemical Vapor Deposition) coating surface, selectively added paint spraying, blackening, etching, laser texturing or stone washing, a sandblasted surface.

[0011] A manufacturing method of an extremely sharp tool according to the fourth aspect of the present invention includes: Step A1: Select a tool body substrate with a rectangular cross-section. First, perform single-sided tool face grinding on the tool body substrate, and then grind a single-sided small inclined plane, small concave surface, small convex surface, small cutting edge surface, or double-sided small inclined plane, small concave surface, small convex surface, small cutting edge surface; the tool body substrate is a conductive metal material. Step A2: Use PVD (Physical Vapor Deposition), CVD (Chemical Vapor Deposition), or PECVD (Plasma Enhanced Chemical Vapor Deposition) processes to deposit a film layer on one cutting edge surface or both cutting edge surfaces and the ground tool face. Step A3: Then, grind the tool body substrate into a trapezoidal cross-section or other shaped cross-section according to the conventional tool manufacturing method to form a tool face. After grinding the tool face, based on this, select whether to perform selective PVD (Physical Vapor Deposition), paint spraying, blackening, etching, laser texturing, stone washing, or sandblasting surface processes on the tool face. Step A5: Grind the other cutting edge surface on the tool body substrate with the original one cutting edge surface. For the tool body substrate with the original two cutting edge surfaces, select to re-grind one of the cutting edge surfaces or not re-grind the cutting edge surface. For the tool body substrate with the originally ground tool face as the final cutting edge surface, grind a cutting edge surface on the other tool face. Step A6: Finally, the tool body substrate with the ground cutting edge surface can be selectively coated with other materials to manufacture an extremely sharp tool.

[0012] Preferably, in the step A1, the conductive metal material is one of, but not limited to, martensitic stainless steel, austenitic stainless steel, ferritic stainless steel, titanium alloy, carbon steel, tungsten steel, duplex stainless steel, die steel, high-speed steel, or heat-resistant steel. In the step A2, the tool body substrate is first bundled into a bundle and loaded into the furnace in a way that the cutting edges are arranged in a circular pattern facing outward, or loaded into the furnace in a way that the single cutting edges are arranged in a circular pattern facing outward, or loaded into the furnace in a way of single-piece hanging arrangement for coating. In the step A2, the film layer includes but is not limited to the wear-resistant layer of ta-C (tetrahedral amorphous carbon / diamond-like carbon film), CrwC (tungsten chromium carbide), TiSiN (silicon titanium nitride), TiAlSiXN (aluminum silicon titanium nitride), AlCrN (aluminum chromium nitride), Ti (titanium), TiB2 (titanium diboride), TiN (titanium nitride), CrN (chromium nitride), DLC (diamond-like coating), ADLC (amorphous diamond-like carbon), ZrN (zirconium nitride), ZrCN (zirconium carbonitride), TiN-TiCN-TiN (titanium nitride-titanium carbonitride-titanium nitride multilayer film), TiCN-TiC-TiN (titanium carbonitride-titanium carbide-titanium nitride ... One of CrAlBN (boron aluminum chromium nitride), TiAlN (aluminum titanium nitride), CrAlSiN (silicon aluminum chromium nitride), TiSiC (silicon titanium carbide), TiC (titanium carbide), CrNC (chromium carbonitride); Among them, the hardness of the wear-resistant layer is higher than that of the base material of the cutter body; In step A1 or step A3, the blade surface grinding method includes but is not limited to: The surface is roughened with a magnesia grinding wheel and polished with a rubber wheel; Resin grinding wheel for rough grinding and rubber wheel for polishing the surface; The resin grinding wheel directly grinds the surface; CBN grinding wheel grinding surface; Polish the surface with a belt sander or a clamping machine; On the basis of grinding and polishing, nylon wheels, sanding belts or cloth wheels can be added to polish the surface.

[0013] Preferably, in step A5, the cross-sectional shape of the cutting edge includes but is not limited to: a V-shaped cutting edge with a symmetrical angle, a V-shaped cutting edge with an asymmetrical angle, a U-shaped cutting edge, a hard cutting edge, or a hard cutting edge on one side and a V-cut edge on the other side; the cutting edge angle range is: 6°-60°, the single-sided cutting angle is: 1°-59°; the cutting edge thickness range is: 0.1mm-1.2mm; In step A5, after the blade surface is ground, the blade tip is deburred, and the treatment methods include but are not limited to: a thousand-leaf leather wheel or a soft leather wheel plus polishing wax, a cloth wheel plus polishing wax, a cloth and linen wheel plus polishing wax, a wool wheel plus polishing wax, a reciprocating cloth, dry ice, liquid nitrogen or electrolytic polishing.

[0014] Preferably, in step A6, the final tool surface includes but is not limited to laser light surface, brushed surface, sanded surface, mirror surface, subsequently added PVD coating surface, PECVD coating surface, CVD coating surface, selectively added painting, blackening, stone washing, etching, laser texturing or stone washing, sandblasting surface or a combination thereof.

[0015] The beneficial effects of the present invention are as follows: The present invention discloses three methods for manufacturing tools. Among them, for the first type of tool manufacturing method, a high-hardness film is plated first and then the tool surface is ground; for the second type of tool manufacturing method, the tool surface is ground first and then a high-hardness film is plated. The loading capacity of the first type of tool manufacturing method is 12 - 25 times higher than that of the second type of tool manufacturing method, and the qualified product rate of the finished products is more than 5 times higher. The manufacturing cost of the first type is reduced by 5 times or more compared with the second type. Moreover, after grinding the tool surface, it is still possible to choose whether to coat the tool surface or perform other processes, which is more flexible in terms of product process diversity; however, the tool surface of the second type of tool has functions such as scratch resistance, and the functions of the coating on the first type of tool are mainly reflected on the cutting edge surface. The third type of tool manufacturing method is based on the first type of manufacturing method. Before plating, one of the tool surfaces is ground, and this surface is not ground after high-hardness coating, thus avoiding the risk of damaging the coating on the cutting edge during the process of grinding the tool surface after coating, and improving the finished product rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of the manufacturing method of the first type of tool in the manufacturing method of an extremely sharp tool of the present invention; Figure 2 is a flow chart of the manufacturing method of the second type of tool in the manufacturing method of an extremely sharp tool of the present invention; Figure 3 is a flow chart of the manufacturing method of the third type of tool in the manufacturing method of an extremely sharp tool of the present invention; Figure 4 is the front view and top view of the first type of tool when loaded into the furnace of the present invention; Figure 5 is another front view and top view of the first type of tool when loaded into the furnace of the present invention; Figure 6 is another front view of the first type of tool when loaded into the furnace of the present invention; Figure 7 is another top view of the first type of tool when loaded into the furnace of the present invention; Figure 8 is the front view of the second type of tool when loaded into the furnace of the present invention; Figure 9 is the top view of the second type of tool when loaded into the furnace of the present invention; Figure 10 is a schematic diagram of the conventional cross-sectional shape after the tool surface is ground; Figure 11 is a schematic diagram of the conventional cross-sectional shape of the cutting edge; Figure 12 is a schematic diagram of another conventional cross-sectional shape of the cutting edge; Figure 13 is a schematic diagram of another conventional cross-sectional shape of the cutting edge; Figure 14 is a schematic diagram of the cutting edge thickness shape; Figure 15 It is a schematic diagram of the shape of the edge angle after sharpening; Figure 16 It is a schematic diagram after grinding the first cutting edge surface or grinding out two cutting edge surfaces during the manufacturing process of the first type of tool of the present invention; Figure 17 It is another schematic diagram after grinding the first cutting edge surface or grinding out two cutting edge surfaces during the manufacturing process of the first type of tool of the present invention; Figure 18 It is a schematic diagram of opening one or two small cutting edge surfaces on the small inclined surface after grinding the first cutting edge surface or grinding out two cutting edge surfaces during the manufacturing process of the first type of tool of the present invention; Figure 19 It is a schematic diagram of selectively welding other material tool bodies on the tool body substrate during the manufacturing process of the first type of tool of the present invention; Figure 20 It is a schematic diagram of the finally manufactured tool of the present invention, where one cutting edge surface is attached with a high-hardness film layer and the other cutting edge surface is not attached with a high-hardness film layer; Figure 21 It is a schematic diagram of the finally manufactured tool of the present invention, where both cutting edge surfaces are attached with high-hardness film layers; Figure 22 It is a schematic diagram of the cross-sectional shape of the cutting edge surface during the manufacturing process of the second type of tool of the present invention; Figure 23 It is a schematic diagram of the shape after grinding during the manufacturing process of the third type of tool of the present invention; Figure 24 It is a schematic diagram of the cross-sectional shapes of the small inclined surface, small concave surface, and small convex surface during the manufacturing process of the third type of tool of the present invention. Detailed implementation manners

[0017] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0018] Next, the present invention will be further described in conjunction with the accompanying drawings.

[0019] An extremely sharp tool, comprising: a tool body substrate having a cutting edge portion, the surfaces on both sides of the cutting edge portion being a first cutting edge surface and a second cutting edge surface respectively, with the first cutting edge surface or the second cutting edge surface being attached with a high-hardness film layer, or both the first cutting edge surface and the second cutting edge surface being attached with high-hardness film layers.

[0020] In the embodiment, a high-hardness film layer is attached to the first cutting edge surface or the second cutting edge surface, or both the first and second cutting edge surfaces, by means of high-hardness PVD, CVD, or PECVD processes. The high-hardness film layer includes, but is not limited to, a wear-resistant layer made of one of ta-C, CrwC, TiSiN, TiAlSiXN, AlCrN, Ti, TiB2, TiN, CrN, DLC, ADLC, ZrN, ZrCN, TiN-TiCN-TiN, TiCN-TiC-TiN, CrAlBN, TiAlN, CrAlSiN, TiSiC, TiC, CrNC; wherein the hardness of the wear-resistant layer is higher than that of the tool body substrate, for example, the hardness reaches HV1000 or above.

[0021] General manufacturing process for the tool body part of a conventional cutting tool: blanking → heat treatment → grinding the cutting edge surface into a trapezoidal cross-section or other shaped cross-section and polishing the surface → opening a single-sided or double-sided cutting edge.

[0022] Figure 10 Schematic diagram of the conventional cross-sectional shape after grinding the cutting edge surface. This technology includes, but is not limited to, the cross-sectional shapes shown; Figure 11 、 Figure 12 、 Figure 13 Schematic diagram of the conventional cross-sectional shape of the cutting edge. This technology includes, but is not limited to, the cross-sectional shapes of the cutting edge shown. Among them Figure 13 only one combination of different cutting edge shapes is shown to form a new cutting edge shape. In fact Figure 11 、 Figure 12 all the different cutting edge shapes shown can be combined with each other to form new cutting edge shapes; Figure 14 、 Figure 15 Schematic diagram of the cutting edge thickness and edge angle.

[0023] Combined with Figure 11 、 Figure 12 and Figure 13 to define the cutting edge surface. For the final product, the two side surfaces that form the final cutting tip at the cutting edge position are defined as the cutting edge surface. For a single-sided edge tool, the cutting edge surface can be one of the cutting edge surfaces.

[0024] A manufacturing method for an extremely sharp tool, including manufacturing methods for three types of tools.

[0025] As Figure 1 shown, the manufacturing method for the first type of tool includes: Step S1, selecting a tool body substrate with a rectangular cross-sectional shape.

[0026] In the embodiment, the tool body substrate is a conductive metal material, such as one of martensitic stainless steel, austenitic stainless steel, ferritic stainless steel, titanium alloy, carbon steel, tungsten steel, duplex stainless steel, die steel, high-speed steel, or heat-resistant steel.

[0027] Before step S2, it is necessary to perform blanking and heat treatment on the tool body substrate. The conventional practices in the industry are not limited.

[0028] In step S2, grind the first cutting edge surface or grind out two cutting edge surfaces, and make the high-hardness film layer adhere to the first cutting edge surface or both cutting edge surfaces through high-hardness PVD, CVD, PECVD processes.

[0029] In the said step S2, if it is selected that only one cutting edge surface has a film layer, it is preferred to first form a single cutting edge surface for coating, and then process the other cutting edge surface on the other tool surface to form the final cutting edge shape; compared with the process of first forming two cutting edge surfaces and then coating, and then grinding off the film layer on any one cutting edge surface, it can prevent the damage to the final cutting edge form due to ion bombardment during processes such as ion cleaning. According to the test standard of ISO8442-5, when using TiB2 as the wear-resistant layer in the same way, the lasting sharpness of the former is more than 15% higher than that of the latter.

[0030] In the embodiment, the high-hardness film layer includes but is not limited to the wear-resistant layer being one of ta-C, CrwC, TiSiN, TiAlSiXN, AlCrN, Ti, TiB2, TiN, CrN, DLC, ADLC, ZrN, ZrCN, TiN-TiCN-TiN, TiCN-TiC-TiN, CrAlBN, TiAlN, CrAlSiN, TiSiC, TiC, CrNC; among them, the hardness of the wear-resistant layer is higher than the hardness of the tool body substrate. For example, its hardness reaches HV1000 or above. For example, if the wear-resistant layer is TiB2, the hardness can reach HV3800-4200.

[0031] In the embodiment, the coating is carried out by using the furnace loading method as shown in Figure 4 , 5 . The furnace loading method is for illustration and is not limited. The tool surfaces are closely attached to each other. The tool body substrates, i.e., the blades, are first bundled into bundles, and then put into the furnace in a circular arrangement with the cutting edges facing outwards, and only the cutting edge positions need to be coated. The furnace loading capacity of this method is high, and the total furnace loading capacity is about 2000 pieces, which is about 12-25 times that of the second type of tool furnace loading capacity. In addition, due to the small coating area, the qualified rate is about 5 times higher than that of the second type of blade furnace loading method.

[0032] In the embodiment, the coating is carried out by using the furnace loading method as shown in Figure 6 , 7 . The furnace loading method is for illustration and is not limited. The blades are put into the furnace in a single-piece circular arrangement with the cutting edges facing outwards, and only the cutting edge positions need to be coated. The furnace loading capacity is high, and the total furnace loading capacity is about 2000 pieces, which is about 12-25 times that of the second type of blade furnace loading capacity. In addition, due to the small coating area, the qualified rate is about 5 times higher than that of the second type of tool furnace loading method.

[0033] In an embodiment, the sharpening method can be to sharpen the blade by grinding abrasives of different meshes on a single side once or multiple times, including but not limited to grinding belts with meshes ranging from 180#-3000#, resin grinding wheels with meshes ranging from 180#-3000#, or CBN grinding wheels of different meshes, or CBN grinding wheels of different meshes or cement grinding wheels, or even manual grindstones with meshes ranging from 200#-10000#.

[0034] Step S3, then grinding the cutter body substrate into a trapezoidal cross section or other cross-section shapes to form a cutter surface according to a conventional cutter manufacturing method.

[0035] In the embodiment, the blade grinding method includes but is not limited to: The surface is roughened with a magnesia grinding wheel and polished with a rubber wheel; Resin grinding wheel for rough grinding and rubber wheel for polishing the surface; The resin grinding wheel directly grinds the surface; CBN grinding wheel grinding surface; Polish the surface with a belt sander or a clamping machine; On the basis of grinding and polishing, nylon wheels, sanding belts or cloth wheel abrasives can be added to polish the surface.

[0036] Step S4, after grinding the blade surface, choose whether to selectively add high hardness PVD, low hardness PVD, painting, blackening, etching, laser texturing, stone washing or sandblasting to the blade surface.

[0037] Step S5, and grind out the other side of the blade surface for the blade base material with the original blade surface on one side. For the blade base material with the original blade surfaces on both sides, choose to re-grind one of the blade surfaces or not to re-grind the blade surface. For the blade base material with the small inclined surface, small concave surface or small convex surface after the original grinding as the final blade surface, grind out the blade surface on the other side of the blade surface.

[0038] In the embodiment, the cross-sectional shape of the cutting edge includes but is not limited to: a V-shaped blade with a symmetrical angle, a V-shaped blade with an asymmetrical angle, a U-shaped blade, a hard blade, or a hard blade on one side and a V-blade on the other side; the cutting edge angle range is: 6°-60°, the single-sided cutting angle: 1°-59°; the cutting edge thickness range is: 0.1mm-1.2mm.

[0039] In the embodiment, burrs will exist on the blade tip after the cutting edge of the tool is ground, and the burrs must be removed to achieve the purpose of smoothly cutting the object. The blade tip burrs can be removed by using a leaf leather wheel or a soft leather wheel plus polishing wax, a cloth wheel plus polishing wax, a wool wheel plus polishing wax, a cloth and linen wheel plus polishing wax, or by swinging the cloth back and forth, or by using the aforementioned various wheels plus wax to remove most of the burrs and then swinging the cloth, or even by using dry ice deburring, liquid nitrogen deburring or electrolytic polishing.

[0040] Step S6. Finally, the knife body substrate with the ground cutting edge surface can be selectively coated with other materials, or not, and then an extremely sharp tool can be made. In the embodiment, the surface of the finally made tool is one or a combination of, but not limited to, a laser light surface, a brushed surface, a sanded surface, a mirror finish surface, a subsequently added PVD coating surface, a PECVD coating surface, a CVD coating surface, selectively adding painting, blackening, etching, laser texturing or stone washing, sandblasting and other surfaces.

[0041] The manufacturing steps of the first type of tool are specifically as follows: Select a knife body substrate with a rectangular cross-sectional shape, and perform blanking and heat treatment on the knife body substrate. The blanking and heat treatment processes are carried out according to the current industry conventional practices and are not limited.

[0042] Grind the first cutting edge surface or grind two cutting edge surfaces, that is, grind a single-sided or double-sided small inclined surface, small concave surface, small convex surface, small cutting edge surface. According to the process design, there are various shape designs, such as Figure 16 , 17 As shown, the present technology includes but is not limited to the listed shapes. The cutting edge surface is not ground or flat ground, and most of the cutting edge surface is still a plane so that the blades can be closely attached to each other when loading into the furnace to increase the loading capacity. In addition, the non-cutting edge surface of the cutting edge does not need to be coated, so the blades can be arranged in a whole bundle or in a single circular arrangement to increase the loading capacity; the surface of the small inclined surface or small cutting edge can be no longer ground after coating as one side cutting edge of the final cutting edge. As for the grinding method of the small inclined surface or small cutting edge, it can be operated according to the current industry technical processing method, and the present technical solution is not limited.

[0043] One or two small cutting edge surfaces can be further opened on the small inclined surface. Opening one small cutting edge surface can be directly opening a sharp cutting edge tip, or there is still a plane with a width of ≥0.1 mm at the cutting edge position instead of a sharp cutting edge tip; the cutting edge with two small cutting edge surfaces is a sharp cutting edge tip, such as Figure 18 As shown in the several examples listed but not limited to Figure 18 The listed several combinations can be the combinations of the aforementioned Figure 16 , Figure 17 Various cross-sectional shapes. The shape of the cutting edge surface can be Figure 11 , Figure 12 , Figure 13 One or more of them. For the sake of convenient description, the cutting edge is taken as an example of a V-shaped edge. For the schemes of a single-sided small inclined surface, small concave surface, small convex surface, small cutting edge surface, the positions of the small inclined surface, small concave surface, small convex surface, small cutting edge surface on the left or right side of the blade can be interchanged.

[0044] Further, other tool bodies can be selectively welded onto the tool body substrate after grinding the first cutting edge surface or after grinding out two cutting edge surfaces, or other tool bodies can be welded after the coating process is completed on the cutting edge. The material of the tool body is a conductive metal material, such as one of martensitic stainless steel, titanium alloy, austenitic stainless steel, ferritic stainless steel, duplex stainless steel, die steel, high-speed steel, or heat-resistant steel; among them, the tool body substrate after grinding the first cutting edge surface or grinding out two cutting edge surfaces serves as the lower part, and the tool body welded with other materials serves as the upper part. The shape of the lower part can be Figure 16 , Figure 17 , Figure 18 one of the shapes in the figure; Figure 19 is a welding schematic diagram.

[0045] Through PVD, CVD, PECVD processes, a high-hardness film layer is deposited on the cutting edge surface. As long as the hardness of the wear-resistant layer of the high-hardness film layer is higher than the hardness of the tool body, such as above HV1000, more preferably, the hardness of the wear-resistant layer reaches HV1500 or above.

[0046] Grind the cutting edge surface to obtain the required blade cross-section. The shape of the blade cross-section can be Figure 10 one of the shapes after grinding shown in the figure, and the present technology includes but is not limited to Figure 10 the cross-section shape.

[0047] Optionally, whether to add surface processes such as high-hardness PVD, CVD processes, low-hardness PVD, painting, blackening, stone washing, etching, laser texturing, sandblasting, etc. to the non-cutting edge surface of the tool body after depositing the high-hardness film.

[0048] For the blade with an original single-sided cutting edge surface, grind out the other side cutting edge surface. For the blade with an original double-sided cutting edge surface, it is possible to choose to re-grind one of the cutting edge surfaces or not re-grind the cutting edge surface. For the blade with the original small inclined surface or small concave surface or small convex surface as the final cutting edge surface, grind out the cutting edge surface on the other cutting edge surface. The polishing method and surface brightness of the cutting edge surface are as described above, and there are no restrictions according to the current industry process. The cutting edge thickness and cutting edge angle are set conventionally. Preferably, the cutting edge thickness is 0.1 mm - 1.2 mm, and the preferably cutting edge angle is a wrap angle of 6 - 60°, and the preferably angle is a single-sided edge opening angle of 1° - 59°. The cross-section shape of the cutting edge surface, the present technology includes but is not limited to Figure 11 , Figure 12 , Figure 13 one or more of them. For the convenience of description, the cutting edge is taken as an example of a V-shaped edge.

[0049] Finally, other material coatings can also be selectively applied to the product.

[0050] On both cutting edge surfaces of the final cutting edge, one cutting edge surface has a high-hardness film layer attached to the surface, and the other cutting edge surface has no high-hardness film layer attached, as shown in Figure 20 the figure; Or on both cutting-edge surfaces of the final cutting edge, high-hardness coating layers are attached to the surfaces of both cutting-edge surfaces, such as Figure 21 as shown.

[0051] Such as Figure 2 as shown, a manufacturing method for a second type of cutting tool includes: Step T1, select a tool body substrate with a rectangular cross-sectional shape, and grind the tool body substrate into a trapezoidal cross-section or other shaped cross-section for the tool surface according to the conventional cutting tool manufacturing method to form the tool surface.

[0052] In the embodiment, the tool body substrate is a conductive metal material, such as one of martensitic stainless steel, austenitic stainless steel, ferritic stainless steel, titanium alloy, carbon steel, tungsten steel, duplex stainless steel, die steel, high-speed steel or heat-resistant steel.

[0053] In the embodiment, the tool surface grinding methods include but are not limited to: Grinding with magnesite wheel and polishing the surface with a rubber wheel; Grinding with resin wheel and polishing the surface with a rubber wheel; Directly grinding the surface with a resin wheel; Grinding the surface with a CBN wheel; Polishing the surface with a belt grinder or a chucking machine; On the basis of grinding and polishing, nylon wheels, abrasive belts or cloth wheels and other abrasives can be added to polish the surface.

[0054] Step T2, select to cut a single-sided cutting edge, a double-sided cutting edge or one of the tool surfaces as the final cutting edge, and make the high-hardness coating layers attach to the surface of the tool body substrate and the first cutting edge surface or both cutting-edge surfaces through high-hardness PVD, CVD, PECVD processes.

[0055] In the embodiment, the high-hardness coating layers include but are not limited to an anti-wear layer being one of ta-C, CrwC, TiSiN, TiAlSiXN, AlCrN, Ti, TiB2, TiN, CrN, DLC, ADLC, ZrN, ZrCN, TiN-TiCN-TiN, TiCN-TiC-TiN, CrAlBN, TiAlN, CrAlSiN, TiSiC, TiC, CrNC; among them, the hardness of the anti-wear layer is higher than the hardness of the tool body substrate, for example, its hardness reaches HV1000 or above.

[0056] In the embodiment, the coating is carried out by using the loading method as Figure 8 , 9 shown. The loading method is for illustration and is not limited. The tool surfaces need to be hung separately one by one, both the cutting edges and the tool surfaces need to be coated, the loading quantity is low, the total loading quantity of the kitchen knives is about 104, and thus the product yield of the manufactured products is also low. However, the tool surfaces and the single-sided or double-sided cutting edges all have coatings, and thus the tool surfaces have functions such as scratch resistance.

[0057] In an embodiment, the sharpening method can be to sharpen the blade by grinding abrasives of different meshes on a single side once or multiple times, including but not limited to grinding belts with meshes ranging from 180#-3000#, resin grinding wheels with meshes ranging from 180#-3000#, or CBN grinding wheels of different meshes or cement grinding wheels or even manual grindstones with meshes ranging from 200#-10000#.

[0058] Step T3, on this basis, choose whether to selectively add high hardness PVD, low hardness PVD, painting, blackening, etching, laser texturing, stone washing or sandblasting to the blade surface.

[0059] Step T4, grind out the other side of the blade surface for the blade base material with the original one side blade surface, and choose to re-grind one side of the blade surface or not to re-grind the blade surface for the blade base material with the original ground blade surface as the final blade surface, grind out the blade surface on the other side of the blade surface.

[0060] In the embodiment, the cross-sectional shape of the cutting edge includes but is not limited to: a V-shaped blade with a symmetrical angle, a V-shaped blade with an asymmetrical angle, a U-shaped blade, a hard blade, or a hard blade on one side and a V-blade on the other side; the cutting edge angle range is: 6°-60°, the single-sided cutting angle: 1°-59°; the cutting edge thickness range is: 0.1mm-1.2mm.

[0061] In the embodiment, burrs will exist on the blade tip after the cutting edge of the tool is ground, and the burrs must be removed to achieve the purpose of smoothly cutting the object. The blade tip burrs can be removed by using a leaf leather wheel or a soft leather wheel plus polishing wax, a cloth wheel plus polishing wax, a cloth and linen wheel plus polishing wax, a wool wheel plus polishing wax, or by swinging the cloth back and forth, or by using the aforementioned various wheels plus wax to remove most of the burrs and then swinging the cloth, or even by using dry ice deburring, liquid nitrogen deburring or electrolytic polishing.

[0062] Step T5, finally, the blade body substrate with the blade surface ground can be selectively coated with other materials, or it can be left uncoated, thereby making an extremely sharp tool; In the embodiment, the final tool surface includes but is not limited to laser light surface, brushed surface, sanded surface, mirror surface, subsequently added PVD coating surface, PECVD coating surface, CVD coating surface, selectively added painting, blackening, etching, laser texturing, stone washing or sandblasting and other surfaces or a combination thereof.

[0063] The manufacturing steps of the second type of tool are as follows: A blade body substrate having a rectangular cross-sectional shape is selected, and the blade body substrate is punched and heat-treated. The punching and heat-treatment procedures are in accordance with current industry conventional practices and are not limited.

[0064] Grind the blade surface to obtain the desired blade cross section. The blade cross section shape can beFigure 10 One of the ground shapes shown, the present technology includes but is not limited to Figure 10 the cross-sectional shape of

[0065] Grind one or two edge surfaces. The polishing method and surface brightness of the edge surface are as described above, and are not limited by the current industry process. For the cross-sectional shape of the edge surface, the present technology includes but is not limited to Figure 11 , Figure 12 , Figure 13 , Figure 22 the shapes shown. For convenience of description, the cutting edges are all exemplified by V-shaped edges.

[0066] By PVD, CVD, PECVD processes, deposit a high-hardness film layer on the tool face and the edge surface, as long as the hardness of the wear-resistant layer of the high-hardness film layer is higher than the hardness of the tool body, such as above HV1000, and more preferably, the hardness of the wear-resistant layer reaches HV1500 or above.

[0067] Optionally, whether to add surface processes such as high-hardness PVD, CVD, PECVD processes, low-hardness PVD, painting, blackening, stone washing, etching, laser texturing, sandblasting, etc. to the non-edge surface of the tool body after depositing the high-hardness film.

[0068] For the blade with an original single-edge surface, grind the other edge surface; for the blade with an original double-edge surface, you can choose to re-grind one of the edge surfaces or not re-grind the edge surface. For the blade with the original ground tool face as the final edge surface, grind an edge surface on the other tool face. The polishing method and surface brightness of the edge surface are as described above, and are not limited by the current industry process. The edge thickness and edge angle are set conventionally. Preferably, the edge thickness is 0.1 mm - 1.2 mm, and the preferred edge angle is the included angle of 6 - 60°, and the preferred angle is the single-sided edge-opening angle of 1° - 59°. The cross-sectional shape of the edge surface, the present technology includes but is not limited to Figure 11 , Figure 12 , Figure 13 one or more of those in. For convenience of description, the following cutting edges are all exemplified by V-shaped edges. For the single-sided small edge surface, the position on the left or right of the blade can be swapped.

[0069] Finally, other material coatings can also be selectively applied to the product.

[0070] For the two edge surfaces of the final cutting edge, one edge surface has a high-hardness film layer attached to the surface, and the other edge surface has no high-hardness film layer attached, as Figure 20 shown; or for the two edge surfaces of the final cutting edge, both edge surfaces have a high-hardness film layer attached to the surface, as Figure 21 shown.

[0071] As Figure 3 shown, the manufacturing method of the third type of tool includes: Step A1: Select a tool body substrate with a rectangular cross-section. First, perform single-sided tool face grinding on the tool body substrate, and then grind single-sided small inclined surfaces, small concave surfaces, small convex surfaces, small cutting edges, or double-sided small inclined surfaces, small concave surfaces, small convex surfaces, and small cutting edges.

[0072] In the embodiment, the tool body substrate is a conductive metal material, such as one of martensitic stainless steel, austenitic stainless steel, ferritic stainless steel, titanium alloy, carbon steel, tungsten steel, duplex stainless steel, die steel, high-speed steel, or heat-resistant steel.

[0073] In the embodiment, the tool face grinding methods include but are not limited to: Grind roughly with a magnesite wheel and polish the surface with a rubber wheel; Grind roughly with a resin wheel and polish the surface with a rubber wheel; Directly grind the surface with a resin wheel; Grind the surface with a CBN wheel; Polish the surface with a belt grinder or a chucking machine; On the basis of grinding and polishing, nylon wheels, abrasive belts, or cloth wheel abrasives can be added to polish the surface.

[0074] In the embodiment, the edge-opening method can be single-sided or multiple grinding with abrasives of different meshes for edge-opening. For example, the abrasive belt mesh number ranges from 180# to 3000#, the resin wheel mesh number ranges from 180# to 3000#, or different mesh number CBN wheels, cement wheels, or even manual whetstones in the range of 200# to 10000# are used for grinding edge-opening.

[0075] Step A2: Use high-hardness PVD, CVD, or PECVD processes to deposit a high-hardness film layer on one or both edge surfaces and the ground tool face.

[0076] In the embodiment, the high-hardness film layer includes but is not limited to a wear-resistant layer being one of ta-C, CrwC, TiSiN, TiAlSiXN, AlCrN, Ti, TiB2, TiN, CrN, DLC, ADLC, ZrN, ZrCN, TiN-TiCN-TiN, TiCN-TiC-TiN, CrAlBN, TiAlN, CrAlSiN, TiSiC, TiC, CrNC; among them, the hardness of the wear-resistant layer is higher than that of the tool body substrate, for example, its hardness reaches HV1000 or above.

[0077] In the embodiment, the loading methods as shown in Figures 4 - 9 can be used for film coating respectively. The loading methods are for illustration and are not limited.

[0078] Step A3: Then, grind the tool body substrate into a trapezoidal cross-section or other shaped cross-sections to form tool faces according to the conventional tool manufacturing method.

[0079] In the embodiment, the blade grinding method includes but is not limited to: The surface is roughened with a magnesia grinding wheel and polished with a rubber wheel; Resin grinding wheel for rough grinding and rubber wheel for polishing the surface; The resin grinding wheel directly grinds the surface; CBN grinding wheel grinding surface; Polish the surface with a belt sander or a clamping machine; On the basis of grinding and polishing, nylon wheels, sanding belts or cloth wheel abrasives can be added to polish the surface.

[0080] Step A4, after grinding the blade surface, choose whether to selectively add high hardness PVD, low hardness PVD, painting, blackening, etching, laser texturing, stone washing or sandblasting to the blade surface.

[0081] Step A5, grind out the other side of the blade surface for the blade body substrate with the original one side blade surface. For the blade body substrate with the original two side blade surfaces, you can choose to re-grind one side of the blade surface or not re-grind the blade surface. For the blade body substrate with the original ground blade surface as the final blade surface, grind out the blade surface on the other side of the blade surface.

[0082] In the embodiment, the cross-sectional shape of the cutting edge includes but is not limited to: a V-shaped blade with a symmetrical angle, a V-shaped blade with an asymmetrical angle, a U-shaped blade, a hard blade, or a hard blade on one side and a V-blade on the other side; the cutting edge angle range is: 6°-60°, the single-sided cutting angle: 1°-59°; the cutting edge thickness range is: 0.1mm-1.2mm.

[0083] In the embodiment, burrs will exist on the blade tip after the cutting edge of the tool is ground, and the burrs must be removed to achieve the purpose of smoothly cutting the object. The blade tip burrs can be removed by using a leaf leather wheel or a soft leather wheel plus polishing wax, a cloth wheel plus polishing wax, a cloth and linen wheel plus polishing wax, a wool wheel plus polishing wax, or by swinging the cloth back and forth, or by using the aforementioned various wheels plus wax to remove most of the burrs and then swinging the cloth, or even by using dry ice deburring, liquid nitrogen deburring or electrolytic polishing.

[0084] Step A6, finally, the blade body substrate with the blade surface ground can be selectively coated with other materials, or it can be left uncoated, thereby making an extremely sharp tool.

[0085] In the embodiment, the final tool surface includes but is not limited to laser light surface, brushed surface, sanded surface, mirror surface, subsequently added PVD coating surface, PECVD coating surface, CVD coating surface, selectively added painting, blackening, stone washing, etching, laser texturing or stone washing, sandblasting and other surfaces or a combination thereof.

[0086] The manufacturing steps of the third type of tool are as follows: Select a tool body substrate with a rectangular cross-sectional shape, and perform blanking and heat treatment on the tool body substrate. The blanking and heat treatment processes follow the current industry's conventional practices and are not limited.

[0087] First, perform single-sided flank grinding on the blade. The single-sided flank to be ground can be designed on the left or right side of the blade; the cross-sectional shape of the blade can be Figure 23 one of the shapes after grinding shown in the figure. This technology includes but is not limited to Figure 23 the cross-sectional shape.

[0088] Then grind single-sided small inclined planes, small concave surfaces, small convex surfaces, small cutting edges or double-sided small inclined planes, small concave surfaces, small convex surfaces, small cutting edges. The cross-sectional shapes of the small inclined planes, small concave surfaces, small convex surfaces, and small cutting edges, this technology includes but is not limited to Figure 24 the shapes shown in the figure. For the positions of the single-sided small inclined planes, small concave surfaces, small convex surfaces, and small cutting edges on the left or right side of the blade, they can be swapped.

[0089] Furthermore, after grinding the small inclined planes, small concave surfaces, small convex surfaces, and small cutting edges, the cutting edge position can form a sharp blade tip or a small flat surface with a size of ≥0.1 mm can be retained, as shown in Figure 22 the figure, but not limited to Figure 22 the shape.

[0090] Through PVD, CVD or PECVD processes, deposit a high-hardness coating on the tool face. As long as the hardness of the wear-resistant layer of the high-hardness coating is higher than the hardness of the tool body, such as above HV1000, more preferably, the hardness of the wear-resistant layer reaches HV1500 or above.

[0091] Optionally, whether to add surface processes such as low-hardness PVD, painting, blackening, stone washing, etching, laser texturing, sandblasting, etc. to the tool body after depositing the high-hardness coating.

[0092] For the blade with an original single-sided cutting edge, grind the other side cutting edge; for the blade with two original cutting edges, it is optional to re-grind one of the cutting edges or not re-grind the cutting edge. For the blade with the original ground tool face as the final cutting edge, grind the cutting edge on the other tool face. The polishing method and surface brightness of the cutting edge are as described above and are not limited by the current industry process. The cutting edge thickness and edge angle are conventional. The preferred cutting edge thickness is 0.1 mm - 1.2 mm, the preferred edge angle is the included angle of 6 - 60°, and the preferred angle is the single-sided edge opening angle of 1° - 59°. The cross-sectional shape of the cutting edge, this technology includes but is not limited to Figure 11 , Figure 12 , Figure 13 one or more of them.

[0093] Finally, other material coatings can also be selectively applied to the product.

[0094] On both cutting edges of the final cutting edge, one cutting edge has a high-hardness film layer attached to its surface, and the other cutting edge has no high-hardness film layer attached, as Figure 20 shown; Or on both cutting edges of the final cutting edge, high-hardness film layers are attached to the surfaces of both cutting edges, as Figure 21 shown.

[0095] The biggest difference between the processes designed for the first type of tool and the second type of tool above is that for the first type of tool, the high-hardness film is plated first and then the tool face is ground, while for the second type of tool, the tool face is ground first and then the high-hardness film is plated.

[0096] Because the first type of tool plates the high-hardness film first and then grinds the tool face, the furnace loading is 12 - 25 times higher than that of the second type, and the finished product qualification rate is more than 5 times higher. The manufacturing cost of the first type is reduced by 5 times or more compared to the second type. Moreover, after grinding the tool face, it is still possible to choose whether to coat the tool face or perform other processes, which is more flexible in terms of product process diversity.

[0097] The biggest difference between the processes designed for the first type of tool and the third type of tool described above is that for the first type of tool, only a small inclined plane, a small concave surface, a small convex surface, or a small cutting edge is ground, and most of the tool face is unground or flat-ground, and then the tool face is ground after plating the high-hardness film layer; while for the third type of tool, based on the first type of tool, one of the tool faces is ground before coating, and this face is not ground after high-hardness coating, thus avoiding the risk of damaging the edge film layer during the process of grinding the tool face after coating. However, the process flexibility is not as strong as that of the first type of blade. In summary, the manufacturing method of the first type of tool is preferably used in the present invention.

[0098] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An extremely sharp cutting tool, characterized in that, Comprising: A tool body substrate with a cutting edge, where the surfaces on both sides of the cutting edge are respectively a first cutting surface and a second cutting surface, and a film layer is attached to the first cutting surface or the second cutting surface, or film layers are attached to both the first cutting surface and the second cutting surface.

2. A super sharp cutting tool according to claim 1, wherein, The film layer is attached to the first cutting surface or the second cutting surface, or both the first cutting surface and the second cutting surface, by PVD, CVD, or PECVD process.

3. A method for manufacturing an extremely sharp cutting tool, characterized in that, Comprising: Step S1: Select a tool body substrate with a rectangular cross-section, and the tool body substrate is a conductive metal material; Step S2: Grind the first cutting surface or grind out two cutting surfaces, and attach a film layer to the first cutting surface or both cutting surfaces by PVD, CVD, or PECVD process; Step S3: Then, grind the tool body substrate into a trapezoidal cross-section or other shaped cross-section to form a cutting surface according to the conventional tool manufacturing method; Step S4: After grinding the cutting surface, on this basis, select whether to perform surface processes such as selective PVD, painting, blackening, etching, laser texturing, stone washing, or sandblasting on the cutting surface; Step S5: Grind out the other cutting surface on the tool body substrate of the original one-sided cutting edge. For the tool body substrate with the original two-sided cutting edges, select to re-grind one of the cutting edges or not re-grind the cutting edge. For the tool body substrate with the original small inclined surface or small concave surface or small convex surface as the final cutting surface, grind out a cutting surface on the other cutting surface; Step S6: Finally, the tool body substrate with the ground cutting surface can be selectively coated with other materials to make an extremely sharp tool.

4. The manufacturing method of an extremely sharp cutting tool according to claim 3, characterized in that, In the said Step S1, the conductive metal material includes but is not limited to one of martensitic stainless steel, austenitic stainless steel, ferritic stainless steel, titanium alloy, carbon steel, tungsten steel, duplex stainless steel, die steel, high-speed steel, or heat-resistant steel; In the said Step S2, the tool body substrates are first bundled and loaded into the furnace with the cutting edges arranged outward, or loaded into the furnace in a single-piece annular arrangement with the cutting edges arranged outward for coating; In the said Step S2, if it is selected that only one cutting surface has a film layer, it is preferably to first form a single cutting surface for coating, and then process the other cutting surface to form the other cutting edge, so as to form the final cutting edge shape; In the said Step S2, the tool body can be optionally welded on the tool body substrate after grinding the first cutting surface or grinding out two cutting surfaces, or the tool body can be welded after the film layer process on the cutting surface, and the tool body material is a conductive metal material; In the said Step S2, the film layer includes but is not limited to one of ta-C, CrwC, TiSiN, TiAlSiXN, AlCrN, Ti, TiB2, TiN, CrN, DLC, ADLC, ZrN, ZrCN, TiN-TiCN-TiN, TiCN-TiC-TiN, CrAlBN, TiAlN, CrAlSiN, TiSiC, TiC, CrNC as the wear-resistant layer; Among them, the hardness of the wear-resistant layer is higher than the hardness of the tool body substrate; In the said Step S3, the cutting surface grinding methods include but are not limited to: Coarse grinding with a magnesite wheel and polishing the surface with a rubber wheel; Coarse grinding with a resin wheel and polishing the surface with a rubber wheel; Direct grinding of the surface with a resin wheel; Grinding the surface with a CBN wheel; Polishing the surface with a belt grinder or a clamping machine; On the basis of grinding and polishing, nylon wheels, abrasive belts, or cloth wheels can be added to polish the surface. In step S5, the cross-sectional shape of the cutting edge includes but is not limited to: a symmetrical V-shaped edge, an asymmetrical V-shaped edge, a U-shaped edge, a hard edge, or a hard edge on one side plus a V-shaped edge on the other side; the cutting edge angle range is: 6°-60°, the single-sided cutting angle is: 1°-59°; the cutting edge thickness range is: 0.1mm-1.2mm; In step S5, after the blade surface is ground, the blade tip is deburred, and the treatment methods include but are not limited to: a thousand-leaf leather wheel or a soft leather wheel with polishing wax, a cloth wheel with polishing wax, a wool wheel with polishing wax, a cloth and linen wheel with polishing wax, a swinging cloth, dry ice, liquid nitrogen or electrolytic polishing; In step S6, the final tool surface includes but is not limited to a laser light surface, a brushed surface, a sanded surface, a mirrored surface, a subsequently added PVD coating surface, a PECVD coating surface, a CVD coating surface, or one or a combination of selectively added painting, blackening, etching, laser texturing or stone washing, and sandblasting surfaces.

5. A method for manufacturing an extremely sharp cutting tool, characterized in that, include: Step T1, selecting a blade substrate with a rectangular cross-section, grinding the blade substrate into a trapezoidal cross-section or other cross-section according to a conventional tool manufacturing method to form a blade surface; the blade substrate is a conductive metal material; Step T2, selecting to first open a single-sided cutting edge, a double-sided cutting edge, or one of the cutting edges as the final cutting edge, and attaching a film layer to the surface of the cutting body substrate and the first cutting edge or both cutting edges through PVD, CVD, or PECVD processes; Step T3, on this basis, choose whether to selectively add PVD, painting, blackening, etching, laser texturing, stone washing or sandblasting surface processing to the blade surface; Step T4, grinding the other blade surface of the blade body substrate with one blade surface, re-grinding one blade surface or not re-grinding the blade surface of the blade body substrate with the blade surface after the original grinding as the final blade surface, grinding the blade surface on the other blade surface; Step T5, finally, the blade substrate with the ground cutting edge can be selectively coated with other materials to produce an extremely sharp tool.

6. The manufacturing method of an extremely sharp cutting tool according to claim 5, characterized in that, In step T1, the conductive metal material includes but is not limited to one of martensitic stainless steel, austenitic stainless steel, ferritic stainless steel, titanium alloy, carbon steel, tungsten steel, duplex stainless steel, die steel, high-speed steel or heat-resistant steel; In step T1, the blade grinding method includes but is not limited to: The surface is roughened with a magnesia grinding wheel and polished with a rubber wheel; Resin grinding wheel for rough grinding and rubber wheel for polishing the surface; The resin grinding wheel directly grinds the surface; CBN grinding wheel grinding surface; Polish the surface with a belt sander or a clamping machine; On the basis of grinding and polishing, nylon wheels, sanding belts or cloth wheels can be added to polish the surface; In the step T2, the furnace is loaded by a single hanging arrangement to perform coating; In the step T2, if only one blade face is selected to have a film layer, it is preferred to first form a single blade face for coating, and then process another blade face on the other blade face to form the final blade edge shape; In the step T2, the film layer includes but is not limited to a wear-resistant layer selected from the group consisting of ta-C, CrwC, TiSiN, TiAlSiXN, AlCrN, Ti, TiB2, TiN, CrN, DLC, ADLC, ZrN, ZrCN, TiN-TiCN-TiN, TiCN-TiC-TiN, CrAlBN, TiAlN, CrAlSiN, TiSiC, TiC, and CrNC; Among them, the hardness of the wear-resistant layer is higher than that of the base material of the cutter body; In step T4, the cross-sectional shape of the cutting edge includes but is not limited to: a symmetrical V-shaped edge, an asymmetrical V-shaped edge, a U-shaped edge, a hard edge, or a hard edge on one side plus a V-shaped edge on the other side; the cutting edge angle range is: 6°-60°, the single-sided cutting angle is: 1°-59°; the cutting edge thickness range is: 0.1mm-1.2mm; In step T4, after the blade surface is ground, the blade tip is deburred, and the treatment methods include but are not limited to: a thousand-leaf leather wheel or a soft leather wheel with polishing wax, a cloth wheel with polishing wax, a cloth and linen wheel with polishing wax, a wool wheel with polishing wax, a swinging cloth, dry ice, liquid nitrogen or electrolytic polishing; In step T5, the final tool surface includes but is not limited to a laser light surface, a brushed surface, a sanded surface, a mirrored surface, a subsequently added PVD coating surface, a PECVD coating surface, a CVD coating surface, and selectively adding one or a combination of spray painting, blackening, etching, laser texturing or stone washing, and sandblasting surfaces.

7. A method for manufacturing an extremely sharp cutting tool, characterized in that, include: Step A1, selecting a blade substrate with a rectangular cross-section, first grinding a single-side blade surface of the blade substrate, and then grinding a single-side small bevel, a small concave surface, a small convex surface, a small blade surface or a double-sided small bevel, a small concave surface, a small convex surface, a small blade surface; the blade substrate is a conductive metal material; Step A2, using PVD, CVD, PECVD process to make one or both edge surfaces and the ground blade surface adhere to the film layer; Step A3, then grinding the cutter body substrate into a trapezoidal cross section or other cross sections to form a cutter face according to a conventional cutter manufacturing method; Step A4, after grinding the blade surface, choose whether to selectively add PVD, painting, blackening, etching, laser texturing, stone washing or sandblasting surface processing to the blade surface; Step A5, grinding the blade surface of the blade body substrate with one blade surface to obtain another blade surface, and for the blade body substrate with two blade surfaces, re-grinding one blade surface or not re-grinding the blade surface, and grinding the blade surface on the other blade surface of the blade body substrate with the blade surface after the original grinding as the final blade surface; Step A6, finally, the blade substrate with the ground cutting edge can be selectively coated with other materials to produce an extremely sharp tool.

8. The manufacturing method of an extremely sharp cutting tool according to claim 7, characterized in that, In step A1, the conductive metal material includes but is not limited to one of martensitic stainless steel, austenitic stainless steel, ferritic stainless steel, titanium alloy, carbon steel, tungsten steel, duplex stainless steel, die steel, high-speed steel or heat-resistant steel; In the step A2, the blade substrates are bundled and loaded into a furnace in a circular arrangement with the blade edges facing outward, or a single blade is loaded into a furnace in a circular arrangement with the blade edges facing outward, or a single blade is loaded into a furnace in a hanging arrangement, and then the coating is performed; In step A2, if only one blade face is provided with a film layer, it is preferred to first form a single blade face for coating, and then process the other blade face to form another blade face, thereby forming the final blade edge shape. In the step A2, the film layer includes but is not limited to a wear-resistant layer selected from the group consisting of ta-C, CrwC, TiSiN, TiAlSiXN, AlCrN, Ti, TiB2, TiN, CrN, DLC, ADLC, ZrN, ZrCN, TiN-TiCN-TiN, TiCN-TiC-TiN, CrAlBN, TiAlN, CrAlSiN, TiSiC, TiC, and CrNC; Among them, the hardness of the wear-resistant layer is higher than that of the base material of the cutter body; In step A1 or step A3, the blade surface grinding method includes but is not limited to: The surface is roughened with a magnesia grinding wheel and polished with a rubber wheel; Resin grinding wheel for rough grinding and rubber wheel for polishing the surface; The resin grinding wheel directly grinds the surface; CBN grinding wheel grinding surface; Polish the surface with a belt sander or a clamping machine; On the basis of grinding and polishing, nylon wheels, sanding belts or cloth wheels can be added to polish the surface.

9. The manufacturing method of an extremely sharp cutting tool according to claim 7, characterized in that, In step A5, the cross-sectional shape of the cutting edge includes but is not limited to: a symmetrical V-shaped edge, an asymmetrical V-shaped edge, a U-shaped edge, a hard edge, or a hard edge on one side plus a V-shaped edge on the other side; the cutting edge angle range is: 6°-60°, the single-sided cutting angle is: 1°-59°; the cutting edge thickness range is: 0.1mm-1.2mm; In step A5, after the blade surface is ground, the blade tip is deburred, and the treatment methods include but are not limited to: a thousand-leaf leather wheel or a soft leather wheel plus polishing wax, a cloth wheel plus polishing wax, a cloth and linen wheel plus polishing wax, a wool wheel plus polishing wax, a reciprocating cloth, dry ice, liquid nitrogen or electrolytic polishing.

10. The manufacturing method of an extremely sharp cutting tool according to claim 7, characterized in that, In step A6, the final tool surface includes but is not limited to laser light surface, brushed surface, sanded surface, mirror surface, subsequently added PVD coating surface, PECVD coating surface, CVD coating surface, selectively added painting, blackening, stone washing, etching, laser texturing or stone washing, sandblasting surface or a combination thereof.

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