Cutter machining method

Abstract

The invention discloses a cutter machining method which comprises the following steps of blank manufacturing, annealing treatment, first cutter face thickness reducing treatment, screeding treatment, heat treatment, second cutter face grooving treatment, post-treatment, edging treatment and the like, and coating-free physical anti-sticking is achieved by optimizing the technological process and designing the annealing treatment time, the heat treatment time and the rib position. The problems that a traditional cutter is stuck, an anti-sticking structure is prone to losing efficacy, and machining cost is high are solved, meanwhile, the cutting requirements of different cutter areas are met, and the practicability and the service life of the cutter are improved. The screeding treatment is carried out after the thickness reduction treatment of the first tool face and before the groove removal treatment of the second tool face, so that the problem of over-high material hardness during premature screeding and the defect of cracking after heat treatment due to over-late screeding are avoided, and a preset inclined surface of the first tool face is used for providing a reference for a rib position, so that an anti-sticking rib is accurately positioned in a blade action area; and after screeding, the recess of the second cutter surface can be eliminated through subsequent groove removing treatment, so that the flatness of the cutter body is ensured, and the anti-sticking precision and the structural strength are both considered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen knife processing, and particularly relates to a knife processing method. BACKGROUND

[0002] In daily cooking, the problem of adhesion of food materials to the blade of a knife has long plagued users. Cucumbers, potatoes, rice cakes and meat, which are rich in water and starch, are prone to adhere to the surface of the blade, resulting in a decrease in cutting efficiency. Users need to frequently clean the adhesion of food materials, interrupting the cooking process; at the same time, adhesion also causes irregular shapes and uneven thickness of food materials, affecting the appearance and taste of dishes. The main reason for the adhesion of food materials is that the blade surface is mostly smooth and flat, and when the knife is used to slice food materials, the close contact between the blade surface and the food materials forms a vacuum adsorption, and in addition, the sliced food materials usually contain a large amount of water or sticky ingredients, which easily causes the sliced food materials to adhere to the blade surface.

[0003] In order to solve this problem, the existing technology mainly has the following three types of schemes: one is to set a special coating (such as a ceramic coating) on the blade surface, but the coating is small in thickness, is easily worn or falls off due to bumps when cutting hard objects, has poor durability, and the coating may release harmful substances during high-temperature cooking; two is to open holes or grooves on the blade surface, although it can improve the problem of adhesion, but the blade with open holes and grooves is easy to cause food to be embedded in the open holes and grooves when cutting garlic or other fine food, which is very troublesome to clean; three is to use an anti-adhesion rib, which uses the lifting effect of the anti-adhesion rib on food materials to reduce the contact between the food materials and the blade surface, and good anti-adhesion effect is achieved.

[0004] The anti-adhesion rib of a traditional knife is formed by welding, injection molding or the like, but such a method is prone to rust, bubbles, sand holes and other problems, affecting the appearance and service life. Some anti-adhesion ribs are formed by stamping process, but most stamping processes do not clearly specify the reasonable timing of the stamping steps, and improper selection of the timing of the stamping processing steps will directly cause product defects, and the specific problems are as follows:

[0005] The problems of too early stamping processing steps are as follows: the surface of the blank has defects such as oxide scale and rolling lines, and the anti-adhesion rib is prone to unevenness after stamping, for example, directly stamping the martensitic stainless steel blank, the rib position is uneven and the peak-to-valley height difference may be close to 1 mm; in addition, the rib position is too early to be punched out on the blade surface, which will affect the efficiency of subsequent processing steps (such as rough grinding); moreover, the stamping plasticity of the high-hardness blank is poor, and the rib position is prone to cracks at the root during stamping, resulting in an increase in the scrap rate, and also increasing the stamping resistance and the wear speed of the die punch, greatly increasing the production cost; in addition, the blank is directly stamped, and the anti-adhesion rib may deviate from the effective action area of the blade edge (such as being too far away from the blade edge), so that the rib position cannot timely contact the food materials during cutting, resulting in poor anti-adhesion effect.

[0006] Problems with stamping too late: For example, if stamping is performed after heat treatment and fine grinding, the blade already has high hardness, and stamping can easily cause the blade surface to crack. If fine grinding is performed before stamping, the smoothness of the finely ground blade surface will be destroyed by stamping, and scratches will appear on the surface of the ribs. During use, food scraps will easily accumulate, which will aggravate adhesion. The depression formed on the other side of the blade surface after stamping is retained or requires secondary grinding, which increases the time required and can also make the blade thinner, resulting in insufficient structural strength. When the blade is close to the finished size, the deformation caused by stamping can easily cause the blade to bend to the side.

[0007] Furthermore, the anti-stick ribs on existing knives are often not designed to address the specific usage characteristics of different parts of the blade. They do not fully consider the differences in how the near-tip, middle, and near-root areas of the blade are used when cutting different foods (the near-tip area is mainly used for processing delicate foods, such as chopping scallions, minced garlic, and minced ginger; the middle area is mainly used for slicing, dicing, and shredding, such as cutting medium-hard foods like potato slices, carrot chunks, and meat slices; the near-root area is mainly used for cutting harder foods, such as pumpkin, winter melon, frozen meat, chopping small bones, cutting nuts, and splitting coconuts). This results in the anti-stick effect not being fully realized, failing to meet the diverse cutting needs of users. Summary of the Invention

[0008] The purpose of this application is to solve the above-mentioned technical problems and provide a tool processing method. By optimizing the process flow and the timing of punching, annealing and heat treatment, it solves the problems of easy failure of the anti-sticking rib structure of traditional tools, low processing efficiency, high scrap rate and high cost. At the same time, it adapts to the cutting needs of different tool zones and improves the practicality and life of the tool.

[0009] The technical solution adopted in this application is as follows:

[0010] A cutting tool, comprising the following steps:

[0011] Making the blank: Making a blank for forming the blade body, the blank having a first cutting face, a second cutting face and a blade back;

[0012] First cutting surface thickening treatment: The first cutting surface is rough ground, and a first cutting surface preset bevel is formed at the end of the first cutting surface away from the back of the blade, and the cutting edge of the first cutting surface preset bevel has a first preset grinding allowance, and a first cutting surface flat grinding surface is formed between the first cutting surface preset bevel and the back of the blade.

[0013] Rib treatment: Pressure is applied to the second cutting surface to cause a portion of the second cutting surface to be concave, and the first cutting surface protrudes in the corresponding concave area to form an anti-sticking rib. The anti-sticking rib is located within the area of ​​the preset inclined surface of the first cutting surface.

[0014] Second cutting face grooving treatment: The second cutting face is rough ground, and a second cutting face preset bevel is formed at the end of the second cutting face away from the back of the blade. The cutting edge of the second cutting face preset bevel has a second preset grinding allowance. In the process of forming the second cutting face preset bevel, the depression formed on the second cutting face in the punching process is removed. The area between the second cutting face preset bevel and the back of the blade is the second cutting face flat grinding surface.

[0015] This technical solution employs a process flow of blank preparation, first-face thickness reduction, rib punching, and second-face grooving. First, the first face is rough-ground to create a pre-set bevel and a flat surface, providing a reference for the anti-sticking rib formation. Then, pressure is applied to the second face to make the first face bulge, forming the anti-sticking rib. Finally, the second face is rough-ground to remove depressions and ensure flatness. This process achieves a coating-free anti-sticking structure design, avoiding the problems of detachment and rusting caused by traditional welding or gluing of ribs. In actual processing, the first cutting edge has a pre-set bevel to match the blade angle. After punching, the anti-stick rib is precisely located in the bevel area, which matches the lifting height of most ingredients after cutting. This ensures that the anti-stick rib can lift the ingredients in time without interfering with the normal cutting of the blade. It can guarantee the anti-stick effect of the anti-stick rib on the ingredients near the blade edge without affecting the sharpness and cutting performance of the blade edge. The groove treatment on the second cutting edge eliminates the impact of the stamping indentation on the strength of the blade body, ensuring that the blade is not easily deformed when cutting hard ingredients, so that the blade body can take into account both the anti-stick effect and structural stability. Furthermore, the rib-forming process is performed after the first cutting face thickening treatment and before the second cutting face grooving treatment. This allows the first cutting face to be roughly shaped through rough grinding before rib-forming, providing a foundation for subsequent rib-forming. Otherwise, it would be difficult to process the pre-set bevel of the first cutting face after rib-forming. Therefore, the pre-set bevel of the first cutting face provides a reference for the rib position, avoiding the defects caused by premature stamping without rough grinding, such as misalignment between the rib position and the pre-set bevel of the first cutting face, as well as the defects of excessive height difference between the peaks and troughs of the rib position. The depression of the second cutting face after stamping can be eliminated through subsequent grooving treatment, ensuring the flatness of the cutting body and balancing anti-sticking accuracy and structural strength.

[0016] The processing method further includes annealing the blank, wherein the annealing process includes: heating the blank to reduce its hardness, and then holding and cooling it to reduce the temperature to room temperature; the annealing step is performed before the first cutting edge thickening step, after the tool blank is formed, the annealing process is performed, and after the hardness of the blank is reduced, the first cutting edge thickening process is performed; or, the annealing step is performed before the rib forming step, after the first cutting edge thickening process, the annealing process is performed, and after the hardness of the blank is reduced, the rib forming process is performed.

[0017] In this technical solution, annealing is added before the first cutting face is thickened or before the punching process to reduce the hardness of the blank to a range suitable for machining. Annealing before thickening reduces material resistance during rough grinding and decreases grinding wheel wear, especially for cutting tools made of certain materials (such as high-carbon stainless steel), preventing edge chipping during rough grinding. Annealing before punching reduces wear on the stamping die; for example, when processing martensitic stainless steel, annealing reduces its hardness to a reasonable range (e.g., 180HB-220HB), significantly extending the die head life. Annealed material has more uniform plasticity, making it less prone to tearing or wrinkling during punching, reducing scrap rate. Simultaneously, stress relief treatment reduces the risk of deformation in subsequent processing and ensures the dimensional accuracy of the anti-sticking ribs.

[0018] The processing method further includes heat treatment of the tool after the punching treatment, the heat treatment including at least one of quenching, tempering and ice forging; the heat treatment step is set before the second tool face degrooving treatment step.

[0019] In this technical solution, heat treatment is performed before the second grooving process on the cutting edge, allowing for optimization of the tool's performance based on material characteristics. For example, for martensitic stainless steel, heat treatment after rib forming followed by grooving avoids damage to the hardened layer during grinding. For low-carbon steel, heat treatment after grooving reduces the impact of oxide scale on the cutting edge. Heat treatment increases the overall hardness of the blade, especially at the root and edge, making it less prone to chipping when cutting hard ingredients. It also enhances the wear resistance of the anti-stick ribs, preventing wear and tear that could lead to anti-stick failure after prolonged use. Furthermore, by performing heat treatment after rib forming and before grooving, the blade remains in a relatively soft, annealed state during stamping, reducing the risk of cracking and mitigating the increased risk of blade surface cracking caused by stamping a high-hardness blade too late.

[0020] The processing method further includes performing a second cutting surface post-processing on the second cutting surface after the second cutting surface degrooving step, wherein the heat treatment step is performed before the second cutting surface post-processing step; and performing a first cutting surface post-processing on the first cutting surface after the second cutting surface degrooving step, wherein the heat treatment step is performed before the first cutting surface post-processing step.

[0021] In this technical solution, heat treatment is limited to the post-treatment of the second and first cutting faces to ensure that the oxide scale after heat treatment can be removed through post-treatment. For example, a thin oxide layer will form on the cutting face after nitrogen quenching, which can be removed by fine grinding or coating during post-treatment to ensure the surface finish. At the same time, the hardness of the tool body is stable after heat treatment, and it is not easy to deform due to grinding force during post-treatment. Especially for the fine machining of anti-sticking ribs (such as sanding), it can prevent the ribs from being ground flat and ensure the anti-sticking effect is durable.

[0022] The post-processing includes: fine grinding the first cutting surface and the second cutting surface by sanding or mirror polishing; or, surface coating treatment of the first cutting surface and the second cutting surface by at least one of spraying or electrophoresis.

[0023] In this technical solution, post-processing, through sanding, mirror polishing, or coating, can repair minor scratches that may occur during stamping, improve the surface finish of the blade, and protect the anti-stick ribs. Sanding or mirror polishing removes tiny burrs from the initial grinding of the blade surface, preventing them from snagging on food during cutting. The protective film formed by spraying or electrophoresis isolates moisture and oil, preventing rust, especially for carbon steel blades, extending their service life. In practical use, the coating layer also reduces friction between food and the blade surface, further reducing the probability of sticking when combined with the anti-stick ribs. The coating also provides good coverage, concealing minor imperfections from stamping and improving aesthetics.

[0024] The processing method further includes a sharpening process after the second blade surface degrooving step. The sharpening process includes sharpening the blade ends of the first blade surface and the second blade surface respectively to remove the first and second preset grinding allowances.

[0025] In this technical solution, the blade is sharpened after the second blade is degrooved, removing the first and second preset grinding allowances. This ensures a precise match between the blade's sharpness and the anti-stick rib's position. For example, the first preset grinding allowance can be set to 0.1mm. During sharpening, the blade is ground to a 30° angle, guaranteeing both a sharp blade and allowing the anti-stick rib to lift the food in time. The grinding allowance is removed simultaneously with the sharpening process. This prevents food from sticking together due to residual grinding marks, and the symmetrical blades on both sides ensure even force distribution during cutting, reducing the risk of deviation.

[0026] In the first cutting surface thickening process, rough grinding includes: first performing oblique grinding to form a preset oblique surface of the first cutting surface; then performing flat grinding to form a flat ground surface of the first cutting surface; in the second cutting surface degrooving process, rough grinding includes: first performing oblique grinding to form a preset oblique surface of the second cutting surface; then performing flat grinding to form a flat ground surface of the second cutting surface.

[0027] In this technical solution, both the first and second cutting edges are rough ground using a "first oblique grinding, then flat grinding" method. The pre-set oblique surface formed by oblique grinding can be pre-adapted to the cutting edge angle, while flat grinding ensures the overall smoothness of the cutting edge. This sequence reduces the contact area during flat grinding, lowers grinding wheel wear and the risk of blade slippage, improves processing efficiency and accuracy, and avoids the problems of excessive contact area and increased processing defects caused by grinding flat first and then oblique.

[0028] In the oblique grinding process, the height dimension D1 of the first cutting face is 25mm-35mm; in the flat grinding process, the grinding thickness Z1 is 0.1mm-0.3mm.

[0029] In this technical solution, if D1 is too small (e.g., 20mm), the anti-stick ribs will be too narrow, failing to fully cover large pieces of food; if it is too large (e.g., 40mm), the angled grinding will take longer and waste material. 25-35mm is suitable for most household knives, and the anti-stick ribs can cover the main contact area above the blade. If Z1 is too small, surface defects cannot be removed; if it is too large, the blade strength will be weakened. 0.1mm-0.3mm ensures a flat blade surface, providing a stable reference surface for the subsequent anti-stick rib forming, ensuring the rib dimension accuracy, and also leaving room for subsequent fine grinding.

[0030] In the punching process, the anti-sticking rib extends along the length of the tool, and the protrusion direction of the anti-sticking rib is perpendicular to the preset inclined surface of the first tool face. The height dimension of the anti-sticking rib protruding from the preset inclined surface of the first tool face is H, 0.2mm≤H≤1.2mm.

[0031] In this technical solution, the anti-stick rib protrusion is perpendicular to the pre-set inclined surface of the first cutting surface, increasing the effective protrusion height of the rib and enhancing the anti-sticking effect on the food. Simultaneously, it reduces the grinding amount of the second cutting surface, lowering material waste and processing time, improving production efficiency. This also allows the anti-stick rib to better match the contact angle between the food and the cutting surface during cutting, optimizing anti-stick properties. A height of H ≥ 0.2mm ensures sufficient air intake, while H ≤ 1.2mm avoids excessive cutting resistance. This height is suitable for stamping processes; when martensitic stainless steel is stamped within this range, the material ductility meets requirements, and the rib is less prone to breakage.

[0032] The anti-sticking ribs include continuous rib segments near the blade tip and intermittent rib segments near the blade root; the continuous rib segments are at varying heights from the blade edge in their continuous direction, and are staggered in height; the intermittent rib segments form intermittent air vents in the length direction of the blade.

[0033] In this technical solution, the continuous ribs at the blade tip are staggered in height, forming a structure with troughs (near the blade edge) and peaks (near the blade back). The troughs form at least one upper anti-sticking space with an opening facing the blade back, and the peaks form at least one lower anti-sticking space with an opening facing the blade edge, creating a good anti-sticking effect on the first cutting surface. Specifically, when cutting food using the blade surface area corresponding to the continuous rib segments, the food will come into contact with the continuous rib segments. The lower anti-sticking space reduces the contact area between the continuous rib segments and the food. By pushing the food away at the troughs below the continuous rib segments, air enters the lower anti-sticking space, disrupting the vacuum adhesion phenomenon of the food and causing the food to detach from the bottom surface of the lower anti-sticking space. As the food continues upward past the continuous rib segments, the presence of the upper anti-sticking space ensures that the anti-sticking cutting surface continues to detach from the food, still disrupting the vacuum adhesion phenomenon. The continuous rib segments can adapt to the needs of cutting various common foods in the middle area of ​​the blade, especially solving the problem of large-area adhesion when traditional knives cut high-starch foods (such as potatoes). Furthermore, the staggered structure of the continuous rib sections adapts to frequent slicing and shredding movements. Whether the food moves laterally or is lifted vertically along the blade, the alternating peaks and troughs continuously prevent adhesion. Especially when handling moist ingredients, the anti-stick space can hold some juice, preventing it from forming a continuous film on the blade surface and exacerbating adhesion, significantly improving cutting smoothness and reducing the number of times food needs to be cleaned. The intermittent air vents at the blade base create airflow channels. When cutting hard ingredients, air continuously enters through the vents, breaking the vacuum adsorption. For example, when chopping bones, fragments can be expelled through the vents, reducing adhesion. The continuous and intermittent rib sections are adapted to different areas of the blade to meet the anti-sticking needs of various food processing methods. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0035] Figure 1 This is a schematic diagram of the rough grinding process of the first cutting surface of the tool body provided in the embodiment of this application;

[0036] Figure 2 This is a schematic diagram of the rough grinding process of the second cutting surface of the cutter body provided in the embodiment of this application;

[0037] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0038] Figure 4 This is a schematic diagram of the structure of a tool body manufactured by a tool machining method according to an embodiment of this application.

[0039] List of components and reference numerals:

[0040] 1. Tool body, 11. First cutting face, 12. Second cutting face, 13. Tool back, 14. Preset bevel of the first cutting face, 15. Flat grinding surface of the first cutting face, 16. Anti-sticking rib, 161. Continuous rib segment, 162. Intermittent rib segment, 1621. Support rib, 1622. Lifting rib, 17. Preset bevel of the second cutting face, 18. Flat grinding surface of the second cutting face. Detailed Implementation

[0041] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0043] In the embodiments of this application, reference is made to Figures 1 to 4 As shown, the graphic structure involved in some steps of the tool processing method and the finished tool made using this method are provided. For ease of explanation and understanding, the following content provided in this application is based on the illustrated product structure. Of course, those skilled in the art will understand that the above structure is only a specific example and illustrative illustration, and does not constitute a specific limitation on the technical solution provided in this application.

[0044] Example 1:

[0045] A tool machining method includes the following steps:

[0046] S1. Blank Preparation: This involves preparing a blank for shaping the blade body 1. The blank has a first cutting surface 11, a second cutting surface 12, and a blade back 13. The first cutting surface 11 refers to the right side of the blade body 1 when the user normally holds the handle. During cutting, the right side is in front of the blade and directly contacts the food, making it the surface most likely to stick after the food is cut. The second cutting surface 12 is the left side of the blade body 1 when the user normally holds the handle. Specifically, the blank can be made from materials including, but not limited to, martensitic stainless steel, tungsten steel, duplex stainless steel, die steel, high-speed steel, heat-resistant steel, carbon steel, and composite steel. The blade is formed by blanking. The blade thickness can be determined according to the intended use of the blade; for example, a slicing blade has a thickness of 2mm-3mm, and a chopping blade has a thickness of 2.5mm-3.5mm. Considering the subsequent grinding process, the blade needs to retain a certain amount of grinding material compared to ordinary blades.

[0047] S2 Annealing: The prepared blank undergoes annealing, which includes heating the blank to reduce its hardness, followed by holding and cooling to room temperature. Annealing can be performed using annealing equipment, and the heating temperature is set according to the material of the substrate and the type of cutting tool being processed. For example, low- and medium-carbon martensitic stainless steel or other materials are stress-relieved and fully annealed using a box-type resistance furnace and a high-frequency coil; high-carbon martensitic stainless steel or other materials are stress-relieved and fully annealed using a vacuum annealing furnace.

[0048] S3 First cutting face thickness reduction treatment: The first cutting face 11 is rough ground. The rough grinding can be performed by a water grinding machine. The rough grinding includes: firstly, performing a bevel grinding process, forming a preset bevel 14 on the end of the first cutting face 11 away from the back of the blade 13, and ensuring that the cutting edge of the preset bevel 14 has a first preset grinding allowance (e.g., 0.1mm). Figure 1 As shown, the height dimension D1 of the first cutting face preset bevel 14 is 25mm-35mm; then, a surface grinding process is performed to form a first cutting face surface grinding surface 15 between the first cutting face preset bevel 14 and the cutting back 13, with a grinding thickness Z1 of 0.1mm-0.3mm; Figure 1 As shown, Figure ① shows the first cutting surface 11 of the cutter body 1 before rough grinding, Figure ② shows the first cutting surface 11 after oblique grinding, and Figure ③ shows the first cutting surface 11 after flat grinding.

[0049] S4 Rib Processing: Rib processing can be performed using a stamping die. The punch of the stamping die applies pressure to the second cutting face 12, causing a portion of the second cutting face 12 to be concave. The first cutting face 11 then protrudes to the concave area, forming an anti-sticking rib 16. The anti-sticking rib 16 is located within the area of ​​the preset inclined surface 14 of the first cutting face; for example... Figure 3 and Figure 4 As shown, the punched anti-adhesion rib 16 extends along the length of the cutting tool. The protruding direction of the anti-adhesion rib 16 is perpendicular to the preset inclined surface 14 of the first cutting surface (θ=90°, the dashed line N1 represents the horizontal plane, and the dashed line N2 represents the line parallel to the protruding direction of the anti-adhesion rib 16). The height of the anti-adhesion rib 16 protruding from the preset inclined surface 14 of the first cutting surface is H, 0.2mm≤H≤1.2mm. Preferably, as... Figure 4 As shown, the anti-sticking rib 16 includes a continuous rib segment 161 near the blade tip and an intermittent rib segment 162 near the blade root; the continuous rib segment 161 has varying heights from the blade edge in its continuous direction, exhibiting a staggered arrangement. Figure 4The diagram shows that the continuous rib section 161 includes multiple V-shaped segments connected at their ends to form a structure with troughs and crests. The troughs form at least one upper anti-stick space with an opening facing the back of the blade 13, and the crests form at least one lower anti-stick space with an opening facing the cutting edge, which can create a good anti-stick effect on the first cutting surface 11. Specifically, when cutting food using the cutting surface area corresponding to the continuous rib section 161, the food will come into contact with the continuous rib section 161. The lower anti-stick space can reduce the contact area between the continuous rib section 161 and the food. By pushing the food away at the trough below the continuous rib section 161, air enters the lower anti-stick space, disrupting the vacuum adsorption phenomenon of the food and causing the food to detach from the bottom surface of the lower anti-stick space. As the food continues upward past the continuous rib section 161, the presence of the upper anti-stick space allows the anti-stick cutting surface to continue to detach from the food, still disrupting the vacuum adsorption phenomenon of the food. The continuous rib section 161 can adapt to the needs of cutting various common ingredients in the middle area of ​​the blade body 1, especially solving the problem of large-area adhesion when traditional knives cut high-starch ingredients (such as potatoes); the intermittent rib section 162 forms intermittent air vents along the length of the blade. Figure 4 The diagram shows that the intermittent rib segment 162 includes a support rib 1621 and a lifting rib 1622, which are spaced apart and form an air vent between them. The support rib 1621 extends parallel to the edge line of the blade back 13, and the lifting rib 1622 extends perpendicular to the edge line of the blade back 13. The intermittent air vent forms an airflow channel. When cutting hard ingredients, air continuously enters through the air vent, breaking the vacuum adsorption. For example, when chopping bones, the fragments can be discharged from the air vent, reducing adhesion. When cutting ingredients, the lifting rib 1622 first lifts the ingredients, and then the support rib 1621 can stably provide support, ensuring that the ingredients are effectively separated from the first blade surface 11, promoting airflow between the ingredients and the first blade surface 11, and improving the anti-sticking performance and cutting performance of the blade root. When the ingredients pass over the support rib 1621 and continue upward, the lifting rib 1622 continues to provide a lifting effect, preventing the ingredients from adhering to the area of ​​the first blade surface 11 above the support rib 1621.

[0050] S5 Heat Treatment: The tool after the punching process is heat treated. The heat treatment includes at least one of the following: quenching, tempering and ice forging. The preferred heat treatment is a nitrogen heat treatment furnace to form less oxide scale, which is beneficial for subsequent fine grinding. For example, the tool body 1 is placed in a nitrogen quenching furnace, heated at a first preset temperature for a first preset time, then oil cooled, and then tempered at a second preset temperature for a second preset time to achieve the required hardness and reduce oxide scale formation.

[0051] S6 Second cutting face grooving treatment: The second cutting face 12 is rough ground. Rough grinding can be performed by a water grinding machine. Rough grinding includes: first performing oblique grinding, forming a preset oblique surface 17 of the second cutting face 12 at the end away from the back of the blade 13, and giving the cutting edge of the preset oblique surface 17 a second preset grinding allowance (e.g., 0.1mm). In the process of forming the preset oblique surface 17, the depressions formed on the second cutting face 12 in the punching process are removed, such as... Figure 2 As shown in Figure ④, the second cutting surface 12 of the blade body 1 is in a state without oblique grinding. Figure ⑤ shows the state of the second cutting surface 12 after oblique grinding and flat grinding. Then, flat grinding is performed, and the flat grinding surface 18 of the second cutting surface is between the preset oblique surface 17 and the blade back 13.

[0052] S7 Post-processing: Perform post-processing on the first cutting surface 11 and on the second cutting surface 12. Specifically, the first cutting surface 11 can be post-processed first, followed by the second cutting surface 12; or the second cutting surface 12 can be post-processed first, followed by the first cutting surface 11. The post-processing includes at least one of the following options: Option 1: Fine grinding the first cutting surface 11 and the second cutting surface 12 by sanding or mirror polishing; Option 2: Surface coating treatment of the first cutting surface 11 and the second cutting surface 12 by at least one of spraying or electrophoresis.

[0053] S8 Sharpening process: The cutting edges of the first cutting surface preset bevel 14 and the second cutting surface preset bevel 17 are sharpened respectively to remove the first preset grinding allowance and the second preset grinding allowance, forming a cutting edge that meets the preset sharpness. Finally, the processing can be completed by deburring.

[0054] Example 2:

[0055] The steps of the tool processing method in Embodiment 2 are mostly the same as those in Embodiment 1, the difference being the timing of the annealing treatment: in Embodiment 1, the annealing treatment step is set before the first cutting face thickening treatment step and after the tool blank is formed; in Embodiment 2, the annealing treatment step is set before the punching treatment step and after the first cutting face thickening treatment, as detailed below:

[0056] A tool machining method includes the following steps:

[0057] S1 Making a blank: Making a blank for forming the blade body 1, the blank having a first cutting face 11, a second cutting face 12 and a blade back 13.

[0058] S2 First cutting face thickness reduction treatment: The first cutting face 11 is rough ground. The rough grinding can be performed by a water grinding machine. The rough grinding includes: firstly, a bevel grinding process is performed to form a first cutting face preset bevel 14 at the end of the first cutting face 11 away from the back of the blade 13, and the cutting edge of the first cutting face preset bevel 14 has a first preset grinding allowance. The height dimension D1 of the first cutting face preset bevel 14 is 25mm-35mm; then, a flat grinding process is performed to form a first cutting face flat grinding surface 15 between the first cutting face preset bevel 14 and the back of the blade 13, and the grinding thickness Z1 is 0.1mm-0.3mm.

[0059] S3 Annealing treatment: The blank is annealed, which includes heating the blank to reduce its hardness, holding it at the temperature and cooling it to room temperature.

[0060] S4 Rib Processing: Rib processing can be performed by a stamping die. The punch of the stamping die applies pressure to the second cutting face 12, causing a portion of the second cutting face 12 to be concave. The first cutting face 11 protrudes to the concave area to form an anti-sticking rib 16. The anti-sticking rib 16 is located within the area of ​​the preset inclined surface 14 of the first cutting face. The stamped anti-sticking rib 16 extends along the length of the tool. The protrusion direction of the anti-sticking rib 16 is perpendicular to the preset inclined surface 14 of the first cutting face (θ = 90°). The height dimension of the anti-sticking rib 16 protruding from the preset inclined surface 14 of the first cutting face is H, 0.2mm ≤ H ≤ 1.2mm. The anti-sticking rib 16 includes a continuous rib segment 161 near the cutting tip and an intermittent rib segment 162 near the cutting root. The continuous rib segment 161 has varying heights from the cutting edge in its continuous direction, resulting in a staggered appearance. The intermittent rib segment 162 forms an intermittent air vent in the length direction of the tool.

[0061] S5 Heat Treatment: Heat treatment is performed on the tool after the punching process. The heat treatment includes at least one of the following: quenching, tempering, and ice forging.

[0062] S6 Second cutting face grooving treatment: The second cutting face 12 is rough ground. The rough grinding can be performed by a water grinding machine. The rough grinding includes: firstly, a bevel grinding process is performed to form a second cutting face preset bevel 17 at the end of the second cutting face 12 away from the back of the blade 13, and the cutting edge of the second cutting face preset bevel 17 has a second preset grinding allowance (e.g., 0.1mm). In the process of forming the second cutting face preset bevel 17, the depression formed by the second cutting face 12 in the punching process is removed; then, a flat grinding process is performed, and the second cutting face flat grinding surface 18 is formed between the second cutting face preset bevel 17 and the back of the blade 13.

[0063] S7 Post-processing: Perform post-processing on the first cutting surface 11 and on the second cutting surface 12. Specifically, the first cutting surface 11 can be post-processed first, followed by the second cutting surface 12; or the second cutting surface 12 can be post-processed first, followed by the first cutting surface 11. The post-processing includes at least one of the following options: Option 1: Fine grinding the first cutting surface 11 and the second cutting surface 12 by sanding or mirror polishing; Option 2: Surface coating treatment of the first cutting surface 11 and the second cutting surface 12 by at least one of spraying or electrophoresis.

[0064] S8 Sharpening process: The cutting edges of the first cutting surface preset bevel 14 and the second cutting surface preset bevel 17 are sharpened respectively to remove the first preset grinding allowance and the second preset grinding allowance, forming a cutting edge that meets the preset sharpness. Finally, the processing can be completed by deburring.

[0065] In Example 1, the annealing treatment after blank forming and before the first cutting face thickness reduction treatment has the following advantages: Annealing directly after blank forming can effectively reduce the hardness of the material after rolling, making the oblique grinding and flat grinding of the first cutting face 11 easier to control. For example, for a 2mm thick martensitic stainless steel blank, the feed speed of the grinding wheel during rough grinding after annealing can be increased by more than 30%, and the error of the preset oblique angle formed by oblique grinding is smaller than that in the unannealed state, ensuring that the anti-sticking ribs 16 of the subsequent punching ribs can be accurately located in the oblique area, avoiding the failure of the rib position due to excessive oblique inclination; the plasticity of the material is improved after annealing, and the friction between the grinding wheel and the cutting face is reduced during rough grinding, extending the service life of the grinding wheel. At the same time, low-hardness materials are less prone to "edge chipping" (edge ​​breakage) during rough grinding, especially for slicing blades with a thickness <2.5mm, resulting in a lower scrap rate; for materials with high initial hardness such as high-carbon martensitic stainless steel (such as 440C) or high-speed steel, annealing at the blank stage can effectively eliminate rolling stress, avoiding deformation of the cutting face due to stress release during subsequent thickness reduction treatment.

[0066] In Example 2, the annealing process after the first face thickness reduction treatment and before the rib forming treatment has the following advantages: During the first face thickness reduction treatment (rough grinding), the blank still maintains high hardness and strong resistance to deformation. Especially during the oblique grinding process, the face is less likely to be concave due to the pressure of the grinding wheel. For example, for a 3mm thick cutting blade blank, the surface roughness of rough grinding in the unannealed state is better than that after annealing, providing a flatter base for subsequent rib forming and reducing stress concentration at the root of the rib. After the thickness reduction treatment, annealing is performed on the already formed first face 11 (including the pre-set oblique surface of the first face), which can uniformly reduce the hardness of the material in this area, making the rib forming more stable during stamping. For example, for the V-shaped structure of the continuous rib segment 161, the stamping angle error after annealing is smaller than that of the blank stage annealing, and the size consistency of the peaks and troughs is higher. After the first face 11 is thickened, most of the machining allowance has been removed. At this time, after annealing and rib forming, the concavity depth of the second face 12 is more uniform, and the subsequent grooving process is more efficient.

[0067] Both Example 1 and Example 2 optimize the annealing timing, avoiding the defects of stamping too early (too high hardness leading to tearing) or too late (too high hardness leading to cracking). The choice can be made flexibly according to the tool material, the complexity of the ribs, and the production scale.

[0068] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0069] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0070] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A tool machining method, characterized in that, Includes the following steps: Making the blank: Making a blank for forming the blade body, the blank having a first cutting face, a second cutting face and a blade back; First cutting surface thickening treatment: The first cutting surface is rough ground, and a first cutting surface preset bevel is formed at the end of the first cutting surface away from the back of the blade, and the cutting edge of the first cutting surface preset bevel has a first preset grinding allowance, and a first cutting surface flat grinding surface is formed between the first cutting surface preset bevel and the back of the blade. Rib treatment: Pressure is applied to the second cutting surface to cause a portion of the second cutting surface to be concave, and the first cutting surface protrudes in the corresponding concave area to form an anti-sticking rib. The anti-sticking rib is located within the area of ​​the preset inclined surface of the first cutting surface. Second cutting face grooving treatment: The second cutting face is rough ground, and a second cutting face preset bevel is formed at the end of the second cutting face away from the back of the blade. The cutting edge of the second cutting face preset bevel has a second preset grinding allowance. In the process of forming the second cutting face preset bevel, the depression formed on the second cutting face in the punching process is removed. The area between the second cutting face preset bevel and the back of the blade is the second cutting face flat grinding surface.

2. The tool machining method according to claim 1, characterized in that, The processing method further includes annealing the prepared blank, wherein the annealing process includes heating the blank to reduce its hardness, and then holding and cooling it to reduce the temperature to room temperature. The annealing step is performed before the first cutting surface thickening step. After the tool blank is formed, annealing is performed, and after the hardness of the blank is reduced, the first cutting surface thickening step is performed; or... The annealing process is performed before the blanking process. After the first cutting surface is thickened, the annealing process is performed. After the hardness of the blank is reduced, the blanking process is performed.

3. The tool machining method according to claim 2, characterized in that, The processing method further includes heat treatment of the tool after the punching treatment, the heat treatment including at least one of quenching, tempering and ice forging. The heat treatment step is performed before the second face degrooving step.

4. The tool machining method according to claim 3, characterized in that, The processing method further includes performing a second cutting surface post-treatment on the second cutting surface after the second cutting surface degrooving step, wherein the heat treatment step is set before the second cutting surface post-treatment step; After the second cutting face degrooving step, the first cutting face is subjected to a first cutting face post-treatment, and the heat treatment step is set before the first cutting face post-treatment step.

5. The tool machining method according to claim 4, characterized in that, The post-processing includes: fine grinding the first cutting surface and the second cutting surface by sanding or mirror polishing; or, surface coating treatment of the first cutting surface and the second cutting surface by at least one of spraying or electrophoresis.

6. The tool machining method according to claim 1, characterized in that, The processing method further includes a sharpening process after the second blade surface degrooving step. The sharpening process includes sharpening the blade ends of the first blade surface and the second blade surface respectively to remove the first and second preset grinding allowances.

7. The tool machining method according to any one of claims 1-6, characterized in that, In the first cutting surface thickness reduction process, rough grinding includes: first performing oblique grinding to form a preset oblique surface of the first cutting surface; then performing flat grinding to form a flat ground surface of the first cutting surface. In the second cutting surface grooving process, rough grinding includes: first performing oblique grinding to form a preset oblique surface of the second cutting surface; then performing flat grinding to form a flat ground surface of the second cutting surface.

8. The tool machining method according to claim 7, characterized in that, In the oblique grinding process, the height dimension D1 of the first cutting face is 25mm-35mm; in the flat grinding process, the grinding thickness Z1 is 0.1mm-0.3mm.

9. The tool machining method according to any one of claims 1-6, characterized in that, In the punching process, the anti-sticking rib extends along the length of the tool, and the protrusion direction of the anti-sticking rib is perpendicular to the preset inclined surface of the first tool face. The height dimension of the anti-sticking rib protruding from the preset inclined surface of the first tool face is H, 0.2mm≤H≤1.2mm.

10. The tool machining method according to claim 9, characterized in that, The anti-adhesion rib includes a continuous rib segment near the blade tip and an intermittent rib segment near the blade root; The continuous rib segments are at varying heights from the blade along their continuous direction, exhibiting a staggered arrangement. The interrupted rib segment has an intermittent air port along the length of the tool.

Images