Acoustic resonance grinding passivation numerical control tool and passivation method thereof

Abstract

The application provides a sound resonance grinding passivation numerical control tool and a passivation method thereof, adopts sound resonance technology to uniformly grind the tool to be passivated and grinding material at high speed, passivates the sharp cutting edge of the tool to be passivated with different shapes into a standard circular arc shape, and adjusts and controls the passivation radius through process parameter change. The application applies the sound resonance technology to the grinding passivation of the numerical control tool, drives the tool and the grinding material to vibrate at high frequency through strong energy excited by resonance, improves the grinding frequency of the grinding material and the tool, and improves the passivation efficiency; the sound waves generated by resonance form multiple force couples among the grinding materials, and gather into a micro sound flow field, accelerate the flow of the grinding materials in the whole field, ensure the uniform grinding of the two sides of the cutting edge, and passivate the cutting edge shape to be standard.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tool processing, and particularly relates to a passivation of a numerical control tool. BACKGROUND

[0002] A numerical control tool needs to be ground by a grinding wheel before being finished to improve cutting efficiency, and the grinding will generate micro notches of different degrees at the cutting edge, which are prone to expand under a high-speed cutting environment, accelerate the wear and even damage the tool, and cause problems such as short tool service life and poor cutting stability. Therefore, the numerical control tool must be passivated before being coated to grind the grinding notches and form a rounded cutting edge, so as to ensure the firmness of the coating and the service life of the tool. Common edge passivation technologies include nylon brush passivation, sand blasting, stirring passivation and the like.

[0003] CN113787191A published on December 14, 2021, discloses a CBN tool machining process with grooves, and relates to the technical field of superhard material tool machining. The process comprises the following steps: using a pressing mold to press CBN powder into a blank with grooves; using tungsten-cobalt alloy to fill the grooves on the blank to obtain a filled blank; assembling the filled blank into a high-pressure synthetic block; synthesizing the high-pressure synthetic block under high temperature and high pressure to obtain a CBN tool semi-finished product; finally, taking out the CBN tool semi-finished product from the high-pressure synthetic block, separating the CBN tool semi-finished product from the hard alloy, then using a grinding tool to trim the CBN tool semi-finished product, and then performing chamfering and passivation using a passivation brush to obtain a CBN tool finished product. The process is used to replace the existing laser engraving slotting method, and can directly obtain a CBN tool with grooves in the high-pressure synthesis stage, greatly reducing the manufacturing cost of the CBN tool with grooves, and being conducive to promoting the application of the CBN tool with grooves. However, as the passivation time is prolonged, the nylon brush will be heated and softened, and the grinding capacity will be reduced, resulting in poor consistency of the passivation effect.

[0004] The disclosure with announcement date 2021-02-19 and announcement number CN112372514A discloses a tool edge machining method, which comprises the following steps: a rough cleaning step: the tool is preliminarily cleaned to remove contaminants on the surface of the tool; a wet sand blasting passivation step: a nozzle is used to perform wet sand blasting treatment on the surface of the tool, and the processing conditions of the wet sand blasting are determined according to the type of the tool and the material of the tool; the type of the tool includes a milling cutter and a finishing tool grain, and the material of the tool includes high-speed steel and hard alloy; a fine cleaning step: after passivation, the tool is sequentially cleaned by alkali solution, acid solution and pure water, and finally cleaned by a rust inhibitor solution; a drying step: after fine cleaning of the tool, drying treatment is performed. The method uses a wet sand blasting method to treat a milling cutter and a finishing tool grain. Although the sand blasting method improves the consistency of the finished product compared with the nylon brush passivation method, the method of the patent can usually only treat regular-shaped tool edges, and the treatment effect is poor for irregular-shaped edges or warped edges, and sufficient time is required for drying after sand blasting, so the production efficiency is also low.

[0005] The stirring passivation method is to put the tool to be treated into the grinding medium, drive the tool to move in a fixed track through the clamping jaw, and realize grinding by relative motion of the edge and the abrasive. This method can be applied to warped edge tools, but the grinding amount on both sides of the edge is usually inconsistent, so the passivation effect is poor. At the same time, the tool moves slowly, so the passivation efficiency is very low. SUMMARY

[0006] In view of the above technical problems, the present application provides a sound resonance grinding passivation numerical control tool and a passivation method thereof, which are used to solve the problems of single shape of the tool, poor passivation effect, low efficiency and poor consistency in the prior art.

[0007] To achieve the above purpose, the technical scheme of the present application is as follows:

[0008] A sound resonance grinding passivation numerical control tool uses sound resonance technology to make the tool to be passivated and the grinding material grind uniformly at high speed, passivates the sharp edges of tools to be passivated of different shapes into standard circular arc shapes, and adjusts and controls the passivation radius by changing process parameters. The present application applies sound resonance technology to the grinding passivation of numerical control tools, drives the tool and the grinding material to vibrate at high frequency by exciting strong energy through resonance, improves the grinding frequency of the grinding material and the tool, and improves the passivation efficiency; the sound waves generated by resonance form multiple force couples between the grinding materials and converge into a micro acoustic flow field, accelerating the overall flow of the grinding material and ensuring uniform grinding on both sides of the edge and standardizing the shape of the passivated edge.

[0009] Further, the method comprises the following steps:

[0010] S1, the to be passivated cutter is placed in the passivation container, the passivation container is filled with abrasive material, and the abrasive material covers the to be passivated cutter after being vibrated and compacted, and the proportion of the abrasive material in the volume of the passivation container is 80% to 90%;

[0011] S2, the filled passivation container and the acoustic resonance mixing device are kept as the same resonance whole, and the acoustic resonance passivation treatment is carried out after the corresponding passivation parameters are set;

[0012] S3, the cutter passivated in step S2 is taken out to clean the surface, and the passivation of the cutter edge is completed.

[0013] Further, in step S1, the horizontal movement and the overturning movement of the to be passivated cutter are restricted, the to be passivated cutters are stacked in the passivation container, the to be passivated cutters are separated by springs, and the stacking height of the to be passivated cutters is 70% to 80% of the height of the container.

[0014] Further, in step S2, the passivation parameters include a resonance frequency of 55 to 65 Hz, a resonance intensity of 70 to 90 g, and a passivation time of 5 to 30 min.

[0015] Further, auxiliary circulating water is used during the passivation of the to be passivated cutter.

[0016] Further, the passivation parameters further include that the temperature of the auxiliary circulating water is 15 to 35 DEG C.

[0017] Further, the abrasive material includes abrasive particles and auxiliary particles, the weight proportion of the abrasive particles is 70 to 90%, and the abrasive particles include powder-like white corundum or silicon carbide or boron nitride or diamond.

[0018] Further, the specification of the abrasive particles is W2.5 to W40.

[0019] Further, the auxiliary particles include wood chips or walnut shells, and the specification of the auxiliary particles is 10 to 20 meshes.

[0020] Further, the types of the to be passivated cutters include milling cutters or chaser cutters or hob cutters, the materials of the to be passivated cutters include tungsten steel or high-speed steel, and the edge shapes of the to be passivated cutters include flat shapes or arc shapes or circular shapes or warped shapes.

[0021] The passivation method of the acoustic resonance grinding passivation numerical control cutter according to any one of the above.

[0022] The beneficial effects of the present application are as follows:

[0023] 1. This invention applies acoustic resonance technology to the grinding and passivation of CNC cutting tools. Through resonance, powerful energy is excited to drive the cutting tool and grinding material to vibrate at high frequency, thereby increasing the grinding frequency of the grinding material and the cutting tool and improving the passivation efficiency. The sound waves generated by resonance form multiple force couples between the grinding materials and converge into a microscopic acoustic flow field, which accelerates the flow of the grinding material throughout the field, ensuring uniform grinding on both sides of the cutting edge and passing off the cutting edge shape as standard.

[0024] 2. The method of the present invention can be applied to cutting tools of different shapes, materials and sizes. With suitable grinding materials, different passivation radii can be controlled by simply changing the passivation process parameters.

[0025] 3. The method of the present invention uses system resonance to excite powerful energy to drive the cutting tool and grinding material to vibrate at high frequency, thereby increasing the grinding frequency of the grinding material and the cutting tool and significantly improving the passivation efficiency.

[0026] 4. The method of the present invention utilizes the resonant sound waves generated by acoustic resonance technology to transmit between the grinding materials, forming multiple force couples and converging into a microscopic acoustic flow field, accelerating the flow of the grinding materials throughout the field, ensuring uniform grinding on both sides of the cutting edge during the passivation process, and achieving a standard passivation shape for the cutting edge.

[0027] 5. The passivation process in the method of the present invention can be applied to cutting tools of different shapes, materials and sizes. With suitable grinding materials, different passivation radii can be controlled by simply changing the passivation process parameters. The process is simple and the product consistency is good. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the passivation process of the present invention.

[0030] Figure 2 This is a diagram showing the results of tool inspection after passivation in Embodiment 1 of the present invention.

[0031] Figure 3 This is a diagram showing the results of tool inspection after passivation in Embodiment 2 of the present invention.

[0032] Figure 4 This is a diagram showing the tool inspection results after passivation in Embodiment 3 of the present invention.

[0033] Figure 5 This is a diagram showing the tool inspection results after passivation in Embodiment 4 of the present invention.

[0034] Figure 6 Figure is the tool detection result after passivation of the embodiment 5 of the present application.

[0035] Figure 7 Figure is the tool detection result after passivation of the embodiment 6 of the present application.

[0036] Figure 8 Figure is the tool detection result after passivation of the comparative example of the present application.

[0037] In the figure:

[0038] 1, tool to be passivated, 2, passivation container, 3, abrasive material, 4, spring, 5, micro acoustic flow field. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] As shown in the figure, the acoustic resonance grinding passivation numerical control tool of the present application passivates the sharp edge of the tool to be passivated 1 into a standard circular arc shape by using acoustic resonance technology to make the tool to be passivated 1 and the abrasive material grind uniformly at high speed, and adjusts and controls the passivation radius by changing process parameters. Figure 1 Further, the passivation method of the acoustic resonance grinding passivation numerical control tool comprises the following steps:

[0041] S1, place the tool to be passivated 1 in the container of the acoustic resonance mixing device, i.e. the passivation container 2, fill the passivation container 2 with abrasive material 3, and after vibrating and compacting, keep the abrasive material 3 covering the tool to be passivated 1, and the volume ratio of the abrasive material 3 to the passivation container 2 is 80% to 90%;

[0042] S2, adjust the resonance frequency of the acoustic resonance mixing device, so that the filled passivation container 2 and the acoustic resonance mixing device remain as the same resonance whole, set the corresponding passivation parameters, and then perform acoustic resonance passivation treatment; and during the passivation, auxiliary circulating water is used, which circulates through the outside of the passivation container 2, so as to achieve the effect of constant temperature in the container;

[0043] S3, take out the tool passivated in step S2 and clean the surface to complete the passivation of the tool edge.

[0044]

[0045] ​The resonance excitation drives strong energy to make the tool 1 and the abrasive material 3 vibrate at high frequency, improves the grinding frequency of the abrasive material 3 and the tool 1, and improves the passivation efficiency; the resonance generates sound waves to form multiple force couples between the abrasive materials and gather into a micro acoustic flow field 5, as shown in Figure 1 The resonance generates sound waves to form multiple force couples between the abrasive materials and gather into a micro acoustic flow field 5, as shown in

[0046] Further, in step S1, the horizontal movement and the overturning movement of the tool 1 to be passivated are constrained, the tool 1 to be passivated is stacked in the passivation container 2, the tool 1 to be passivated is separated by the spring 4, and the stacking height of the tool 1 to be passivated is 70% to 80% of the container height.

[0047] Further, in step S2, the passivation parameters include a resonance frequency of 55 to 65 Hz, a resonance strength of 70 to 90 g, a passivation time of 5 to 30 min, and a temperature of the auxiliary circulating water of 15 to 35°C.

[0048] Further, the abrasive material 3 includes abrasive particles and auxiliary particles, the weight ratio of the abrasive particles is 70 to 90%, and the abrasive particles include powder-like white corundum or silicon carbide or boron nitride or diamond. The abrasive particle specification is W2.5 to W40. The auxiliary particles include wood chips or walnut shells, and the auxiliary particle specification is 10 to 20 mesh.

[0049] The tool 1 to be passivated includes a milling cutter or a comb cutter or a hob, the material of the tool 1 to be passivated includes tungsten steel or high-speed steel, and the blade shape of the tool 1 to be passivated includes a straight shape or an arc shape or a circular shape or a warped shape.

[0050] Embodiment 1

[0051] In this embodiment, the tool to be passivated is a triangular comb cutter, the blade is warped by about 40°, and the material is tungsten steel.

[0052] Step 1: Place the tool to be passivated in the passivation container, add the abrasive material in the container, and vibrate to make the abrasive material cover the tool to be passivated;

[0053] The abrasive material is prepared by uniformly mixing SiC particles and walnut shells at a weight ratio of 9:1, the stacking height of the tool to be passivated after being constrained is 70% of the container height, the abrasive material occupies 85% of the container volume, the SiC particle specification is W25, and the walnut shell specification is 10 mesh.

[0054] Step 2: Adjust the resonance frequency to make the filled passivation container and the acoustic resonance mixing device form a whole resonance body, set the corresponding passivation parameters, and perform acoustic resonance passivation treatment.

[0055] The resonance frequency is set to 60 Hz, and the passivation parameters are: resonance intensity 80 g, passivation time 20 min, and auxiliary circulating water temperature 25°C during passivation.

[0056] Step 3: Take out the passivated tool in step 2 and clean the surface to complete the tool edge passivation.

[0057] Example 2

[0058] The tool to be passivated in this example is a triangular chaser with an edge warpage of about 40° and a tungsten steel material.

[0059] Step 1: Place the tool to be passivated 1 in the passivation container 2, add abrasive material 3 in the container, and then shake it to make the abrasive material cover the tool to be passivated 1;

[0060] The abrasive material 3 is a mixture of SiC particles and walnut shells with a weight ratio of 9:1, the height of the stacked tools to be passivated 1 after being constrained is 70% of the container height, and the abrasive material occupies 80% of the container volume; the size of the SiC particles is W25, and the size of the walnut shells is 10 mesh.

[0061] Step 2: Adjust the resonance frequency to keep the filled passivation container 2 and the acoustic resonance mixing device as a whole resonance, and then set the corresponding passivation parameters to perform acoustic resonance passivation treatment;

[0062] The resonance frequency is set to 60 Hz, and the passivation parameters are: resonance intensity 80 g, passivation time 30 min, and auxiliary circulating water temperature 25°C during passivation.

[0063] Step 3: Take out the passivated tool in step 2 and clean the surface to complete the tool edge passivation.

[0064] Example 3

[0065] The tool to be passivated in this example is a square toothed tool with an edge warpage of about 10° and a tungsten steel material.

[0066] Step 1: Place the tool to be passivated 1 in the passivation container 2, add abrasive material 3 in the passivation container 2, and then shake it to make the abrasive material cover the tool to be passivated;

[0067] The abrasive material is a mixture of SiC particles and walnut shells with a weight ratio of 8.5:1.5, the height of the stacked tools to be passivated 1 after being constrained is 75% of the container height, and the abrasive material occupies 80% of the container volume; the size of the SiC particles is W40, and the size of the walnut shells is 20 mesh.

[0068] Step 2: Adjust the resonance frequency to keep the filled passivation container and the acoustic resonance mixing device as a whole resonance, and then set the corresponding passivation parameters to perform acoustic resonance passivation treatment;

[0069] The resonance frequency is set to 55 Hz, and the passivation parameters are: resonance intensity 90 g, passivation time 15 min, and auxiliary circulating water temperature 15°C during passivation.

[0070] Step 3: Take out the passivated tool in step 2 and clean the surface to complete the passivation of the tool edge.

[0071] Example 4

[0072] In this embodiment, the tool to be passivated 1 is a square tooth cutter, the edge is warped by about 10°, and the material is tungsten steel.

[0073] Step 1: Place the tool to be passivated 1 in the passivation container 2, add abrasive material 3 in the container, and then shake it to make the abrasive material cover the tool to be passivated 1;

[0074] The abrasive material is a mixture of boron nitride particles and walnut shells with a weight ratio of 8.5:1.5, the height of the stacked passivated tools 1 is 75% of the container height, and the abrasive material occupies 90% of the container volume; the size of the boron nitride particles is W40, and the size of the walnut shells is 20 mesh;

[0075] Step 2: Adjust the resonance frequency to keep the filled passivation container and the acoustic resonance mixing device as a whole, and then set the corresponding passivation parameters to perform acoustic resonance passivation treatment;

[0076] The resonance frequency is set to 55 Hz, and the passivation parameters are: resonance intensity 90 g, passivation time 30 min, and auxiliary circulating water temperature 15°C during passivation.

[0077] Step 3: Take out the passivated tool in step 2 and clean the surface to complete the passivation of the tool edge.

[0078] Example 5

[0079] In this embodiment, the tool to be passivated is a circular milling cutter, the edge is warped by about 30°, and the material is high-speed steel.

[0080] Step 1: Place the tool to be passivated in the passivation container, add abrasive material in the container, and then shake it to make the abrasive material cover the passivated tool;

[0081] The abrasive material is a mixture of white corundum particles and wood chips with a weight ratio of 9:1, the height of the stacked passivated tools 1 is 75% of the container height, and the abrasive material occupies 90% of the container volume; the size of the white corundum particles is W2.5, and the size of the wood chips is 20 mesh;

[0082] Step 2: Adjust the resonance frequency to keep the filled passivation container and the acoustic resonance mixing device as a whole, and then set the corresponding passivation parameters to perform acoustic resonance passivation treatment;

[0083] The resonance frequency is set to 65 Hz, and the passivation parameters are: resonance intensity 70 g, passivation time 10 min, and auxiliary circulating water temperature 35°C during passivation.

[0084] Step 3: Take out the passivated tool in step 2 and clean the surface to complete the passivation of the tool edge.

[0085] Example 6

[0086] In this embodiment, the tool to be passivated is a round milling cutter with an edge curvature of about 30° and a material of high-speed steel.

[0087] Step 1: Place the tool to be passivated 1 in the passivation container 2, add abrasive material 3 in the container, and keep the abrasive material covering the passivated tool after vibration;

[0088] The abrasive material is a mixture of diamond powder and wood chips in a weight ratio of 8:2, the stacking height of the passivated tool 1 after constraint is 75% of the container height, and the abrasive material occupies 90% of the container volume; the specification of the diamond powder is W2.5, and the specification of the wood chips is 20 mesh;

[0089] Step 2: Adjust the resonance frequency to keep the filled passivation container and the acoustic resonance mixing device as a whole resonance, set the corresponding passivation parameters, and perform acoustic resonance passivation treatment;

[0090] The resonance frequency is set to 65 Hz, and the passivation parameters are: resonance intensity 80 g, passivation time 5 min, and auxiliary circulating water temperature 35°C during passivation.

[0091] Step 3: Take out the passivated tool in step 2 and clean the surface to complete the passivation of the tool edge.

[0092] Comparative Example

[0093] In this embodiment, the tool to be passivated is a round milling cutter with an edge curvature of about 30° and a material of high-speed steel.

[0094] Step 1: Place the tool to be passivated 1 in the passivation container 2, add abrasive material 3 in the container, and keep the abrasive material covering the passivated tool after vibration;

[0095] The abrasive material is a mixture of white corundum particles and wood chips in a weight ratio of 9:1, the stacking height of the passivated tool 1 after constraint is 75% of the container height, and the abrasive material occupies 90% of the container volume; the specification of the white corundum particles is W2.5, and the specification of the wood chips is 20 mesh;

[0096] Step 2: Place the filled passivation container on the vibration table, drive the vibration table by a motor with a rated power of 1 kw, set the corresponding passivation parameters, and perform passivation treatment for 10 min;

[0097] Step 3: The tool after passivation in step 2 is taken out and the surface is cleaned, and the tool edge passivation is completed.

[0098] The edge of the numerical control tool after passivation in examples 1-6 and comparative example 1 is detected respectively. Figures 2-8 The edge of the numerical control tool after passivation in examples 1-6 and comparative example 1 is detected respectively. Figure 2 As shown in FIG. 1, the detection result of the numerical control tool edge after passivation in example 1 is shown, the edge presents a standard circular arc shape, and the fitted circular arc radius is 0.053 mm. Figure 3 As shown in FIG. 2, the detection result of the numerical control tool edge after passivation in example 2 is shown, the edge presents a standard circular arc shape, and the fitted circular arc radius is 0.078 mm. Figure 4 As shown in FIG. 3, the detection result of the numerical control tool edge after passivation in example 3 is shown, the edge presents a standard circular arc shape, and the fitted circular arc radius is 0.023 mm. Figure 5 As shown in FIG. 4, the detection result of the numerical control tool edge after passivation in example 4 is shown, the edge presents a standard circular arc shape, and the fitted circular arc radius is 0.043 mm. Figure 6 As shown in FIG. 5, the detection result of the numerical control tool edge after passivation in example 5 is shown, the edge presents a standard circular arc shape, and the fitted circular arc radius is 0.021 mm. Figure 7 As shown in FIG. 6, the detection result of the numerical control tool edge after passivation in example 6 is shown, the edge presents a standard circular arc shape, and the fitted circular arc radius is 0.067 mm. Figure 8 As shown in FIG. 7, the detection result of the numerical control tool edge after passivation in comparative example 1 is shown, the edge shape is waterfall shape, non-standard circular arc, so it cannot be fitted with the corresponding circular arc radius.

[0099] The determination of the edge passivation radius uses a macro profile measuring instrument, and the specific equipment model is HOMMEL-TAMI CT8000.

[0100] When measuring, the edge placement angle is adjusted with the aid of the measuring tool, the edge to be measured is upward, the profile instrument probe contacts the tool surface, moves along the edge normal direction, and the profile data is displayed in the computer software as a curve. The points on both sides of the curve are taken to perform circular arc fitting and radius measurement, and the passivation radius data is obtained. The detection results are shown in Table 1.

[0101] Table 1: Detection results of numerical control tool edge

[0102] Edge radius (pm) Edge shape Example 1 53 Standard round Example 2 78 Standard round Example 3 23 Standard round Example 4 43 Standard round Example 5 21 Standard round Example 6 67 Standard round Comparative Example / Cascade

[0103] As can be seen from the data in Table 1, the blade edge shape of the tool after passivation in Examples 1-6 is a standard circular arc, and the blade edge passivation radius can be adjusted according to the passivation process. In the comparative example, the tool after passivation has an uneven grinding amount on both sides of the blade edge due to the upward bending of the blade edge, forming a waterfall-shaped blade edge, and the vibration intensity is insufficient, the grinding amount is too small, and the blade edge radius is lower than the lower limit of the instrument detection.

[0104] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions described in the foregoing embodiments, or any modification or equivalent replacement of part or all of the technical features, without departing from the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A method of passivating a numerically controlled tool for acoustic resonance grinding, characterized in that, The application discloses a method for processing a sharp blade of a tool bit by using an acoustic resonance technique. The grinding material (3) comprises abrasive particles and auxiliary particles, the weight proportion of the abrasive particles is 70-90%, the abrasive particles comprise white powder corundum, silicon carbide, boron nitride or diamond, the abrasive particle specification is W2.5-W40, and the auxiliary particles comprise wood chips or walnut shells. The method comprises the following steps: S1, placing the tool bits to be blunted (1) in a blunting container (2), restraining horizontal movement and overturning movement of the tool bits to be blunted (1), stacking the tool bits to be blunted (1) in the blunting container (2), and separating the tool bits to be blunted (1) by springs (4); filling the blunting container (2) with the grinding material (3), and keeping the grinding material (3) covering the tool bits to be blunted (1) after vibration and compaction; the volume proportion of the grinding material (3) in the blunting container (2) is 80%-90%; S2, adjusting the resonance frequency, keeping the filled blunting container (2) and the acoustic resonance mixing device as a same resonance whole, and performing acoustic resonance blunting treatment after setting corresponding blunting parameters; the blunting parameters comprise a resonance frequency of 55-65 Hz, a resonance intensity of 70-90 g, and a blunting time of 5-30 min; S3, taking out the tool bits blunted in step S2 and cleaning the surfaces, and completing the tool bit blade blunting.

2. The method of passivating a numerically controlled tool for acoustic resonance grinding according to claim 1, characterized in that The stacking height of the tool bits to be blunted (1) in step S1 is 70%-80% of the container height.

3. A method of passivating a numerically controlled tool for acoustic resonance grinding according to claim 1 or 2, characterized in that Auxiliary circulating water is used during the blunting of the tool bits to be blunted (1).

4. The method of passivating a numerically controlled tool for acoustic resonance grinding according to claim 3, characterized in that The blunting parameters further comprise a temperature of the auxiliary circulating water of 15-35 DEG C.

5. The passive method of passive CNC tooling by acoustic resonance grinding according to claim 1 or 2 or 4, characterized in that, The material of the tool bits to be blunted (1) comprises tungsten steel or high-speed steel.

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