Bionic frequency doubling flutter cutting tool handle, cutting tool and cutting method

Abstract

The invention discloses a bionic frequency doubling flutter cutting tool handle which comprises a clamping area and an overhanging area, flutter grooves are formed in the overhanging area, in the cutting machining process, the bionic frequency doubling flutter cutting tool handle drives a blade to conduct flutter cutting, and when the bionic frequency doubling flutter cutting tool handle is applied to the finish machining occasion of materials difficult to machine, compared with common cutting, the cutting efficiency is greatly improved. By means of the method, blade abrasion can be greatly delayed, the service life of the blade is prolonged, the surface roughness of a machined workpiece is reduced, and good machined surface quality is obtained. According to the bionic frequency-doubling flutter cutting tool handle, rotational motion of a machined workpiece serves as an excitation source, and compared with a vibration cutting tool bar in the prior art, an external excitation power source is not needed, and cost is low; the bionic frequency doubling flutter cutting knife handle is simple in structure and convenient to manufacture. The invention further provides a cutting tool which comprises a blade and the bionic frequency doubling flutter cutting tool handle. The invention further provides a cutting method using the cutting tool.

Description

Technical Field

[0001] The invention relates to the technical field of machining, and in particular to a bionic frequency-doubled vibration cutting tool holder, a cutting tool and a cutting method. Background Art

[0002] With the continuous change of the generation of aircraft, its performance has been improved, and the operating temperature of aircraft engines has been continuously increased. Titanium alloys and nickel-based high-temperature alloys are widely used in the aerospace field due to their good high-temperature performance, high strength, creep resistance and corrosion resistance. In aircraft engines, they are widely used in the manufacture of engine blades, turbine discs, guides and combustion chambers, accounting for about 50% of the total weight of the engine. However, the physical properties of titanium alloys and high-temperature alloys such as high strength, hardness and low thermal conductivity make them recognized as difficult-to-process materials. The large cutting force, high cutting temperature and severe work hardening during the processing lead to rapid wear of the cutting blades, short blade life, low processing efficiency and poor surface quality.

[0003] In recent years, researchers have applied vibration cutting technology to improve the machinability of difficult-to-machine materials. This technology is a forced excitation cutting method that applies high-frequency micron-level amplitude to the blade through an external power supply and transducer. It has the advantages of reducing cutting force, reducing cutting temperature, increasing blade life, and improving processing efficiency. However, on the one hand, vibration cutting requires an external excitation power supply and a special vibration tool holder, which has a complex structure and high cost. On the other hand, the excitation power is low and the vibration amplitude is small. These problems limit the application of vibration cutting technology in the processing of difficult-to-machine materials.

[0004] Self-excited vibration cutting technology is a self-excited vibration cutting method that relies on the cutting energy of the cutting system to generate an amplitude of tens of microns. It does not require external energy supply and has the advantages of simple structure, high excitation power, and large vibration amplitude. It has been applied in self-excited turning to generate metal short fibers, self-excited chip breaking deep hole drilling, self-excited grinding to reduce burns, and self-excited cutting in rough machining to extend blade life. However, there is no research on self-excited vibration finishing. Summary of the invention

[0005] The purpose of the present invention is to provide a bionic frequency-doubled vibration cutting tool holder, a cutting tool and a cutting method to solve the problems existing in the above-mentioned related technologies, extend the service life of the tool and improve the cutting quality of the workpiece.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a bionic frequency-doubled vibration cutting tool holder, comprising:

[0008] A clamping area, the clamping area being capable of being fixed to a tool holder of a machine tool;

[0009] The overhanging area includes a mounting section and a slotted section, the mounting section has a mounting surface parallel to the axis of the overhanging area, and the mounting surface is used to fix the blade; the slotted section is connected to the clamping area at one end away from the mounting section, and the slotted section is provided with a flutter groove, which is a U-shaped groove, the opening of the flutter groove is located on the circumferential surface of the overhanging area, the bottom surface of the flutter groove is a plane, and the bottom surface of the flutter groove is parallel to the mounting surface.

[0010] Preferably, the vibration groove is located on a side of the axial length midline of the slotted area close to the clamping area.

[0011] Preferably, the mounting surface is coplanar with the axis of the overhanging area, and the opening and the bottom surface of the vibration groove are respectively located on both sides of the axis of the overhanging area.

[0012] Preferably, the side surfaces of the flutter groove are perpendicular to the axis of the overhanging area.

[0013] Preferably, the clamping area is a rectangular parallelepiped structure, and the clamping area can cooperate with the fastening screws of the tool holder to achieve fixation.

[0014] The present invention also provides a cutting tool, comprising a blade and the above-mentioned bionic double-frequency vibration cutting tool holder, wherein the blade is fixed to the mounting surface, the blade can contact the workpiece, the rotary motion of the workpiece is used as an excitation source, and energy is input into the cutting tool to realize the overhang area driving the blade to vibrate, and the blade has double-frequency vibration in the cutting speed direction and the cutting depth direction while cutting the workpiece.

[0015] Preferably, the blade is detachably connected to the mounting section.

[0016] Preferably, the mounting section is provided with an acceleration sensor to monitor vibration of the blade.

[0017] The present invention also provides a cutting method, using the above-mentioned cutting tool, installing the cutting tool on a tool holder of a machine tool, the machine tool drives the workpiece to rotate, the blade contacts the workpiece, and the overhang area drives the blade to vibrate along the cutting speed direction and the cutting depth direction.

[0018] Preferably, the vibration frequency of the blade in the cutting depth direction is twice the vibration frequency in the cutting speed direction, and the vibration trajectory of the blade is in an 8-shape.

[0019] Compared with the related art, the present invention has achieved the following technical effects: the bionic frequency-doubled vibration cutting tool holder of the present invention includes a clamping area and an overhanging area, wherein the clamping area can be fixed on the tool holder of the machine tool; the overhanging area includes a mounting section and a slotting section, the mounting section has a mounting surface parallel to the axis of the overhanging area, and the mounting surface is used to fix the blade; the slotting section is connected to the clamping section at one end away from the mounting section, and a vibration groove is provided in the slotting section, the vibration groove is a U-shaped groove, the opening of the vibration groove is located on the circumferential surface of the overhanging area, the bottom surface of the vibration groove is a plane, and the bottom surface of the vibration groove is parallel to the mounting surface.

[0020] The bionic double frequency vibration cutting tool holder of the present invention has a vibration groove in the overhanging area. During the cutting process, the bionic double frequency vibration cutting tool holder drives the blade to perform vibration cutting. When applied to the finishing of difficult-to-cut materials, compared with ordinary cutting, the present invention can greatly delay the wear of the blade, extend the service life of the blade, and reduce the surface roughness of the workpiece to obtain good surface quality. The bionic double frequency vibration cutting tool holder of the present invention uses the rotary motion of the workpiece as the excitation source. Compared with the vibration cutting tool bar in the prior art, it does not require an external excitation power supply and has a lower cost. The bionic double frequency vibration cutting tool holder of the present invention has a simple structure and is easy to manufacture, and is suitable for popularization and application.

[0021] The present invention also provides a cutting tool, comprising a blade and the above-mentioned bionic frequency-doubled vibration cutting tool holder. At the same time, the present invention also provides a cutting method, using the above-mentioned cutting tool. The cutting tool and cutting method of the present invention naturally have the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a microscopic diagram of the katydid's tibia and scraper;

[0024] Figure 2 This is a frequency graph of the katydid's double-frequency call;

[0025] Figure 3 It is a schematic structural diagram of a bionic frequency-doubled vibration cutting tool holder disclosed in an embodiment of the present invention;

[0026] Figure 4 A schematic side view of a bionic frequency-doubled vibration cutting tool holder disclosed in an embodiment of the present invention;

[0027] Figure 5 for Figure 4 Schematic diagram of the cross-section structure along the AA direction;

[0028] Figure 6 A schematic diagram of the structure of a cutting tool disclosed in an embodiment of the present invention;

[0029] Figure 7 A schematic diagram of the processing of the cutting tool disclosed in the embodiment of the present invention;

[0030] Figure 8 A schematic diagram of a machining trajectory of a blade during machining of a cutting tool disclosed in an embodiment of the present invention;

[0031] Fig. 9 It is a time domain vibration curve diagram of the bionic frequency-doubled vibration cutting tool holder in three directions disclosed in the embodiment of the present invention;

[0032] Fig.10 It is a spectrum analysis diagram of the cutting speed direction of the bionic frequency-doubled vibration cutting tool holder disclosed in the embodiment of the present invention;

[0033] Fig.11 This is a spectrum analysis diagram of the bionic frequency-doubled vibration cutting tool holder in the cutting depth direction disclosed in the embodiment of the present invention;

[0034] Fig.12 A comparison chart of the life of chatter cutting blades of the conventional cutting tool disclosed in the embodiment of the present invention and the cutting tool of the present application;

[0035] Fig.13 A comparison diagram of the chatter cutting surface morphology of the common cutting disclosed in the embodiment of the present invention and the cutting tool of the present application;

[0036] Fig.14 This is a comparison chart of the chatter cutting surface roughness of the conventional cutting tool disclosed in the embodiment of the present invention and the cutting tool of the present application.

[0037] In the figure: 100, bionic frequency-doubled vibration cutting tool holder;

[0038] 1. Clamping area; 2. Overhang area; 3. Flutter groove; 4. Mounting surface; 5. Blade; 6. Workpiece to be processed; 7. Tool holder; 8. Fastening screws; 9. Acceleration sensor; 10. Vibration signal acquisition system. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The purpose of the present invention is to provide a bionic frequency-doubled vibration cutting tool holder, a cutting tool and a cutting method to solve the problems existing in the above-mentioned related technologies, extend the service life of the tool and improve the cutting quality of the workpiece.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Embodiment 1

[0043] This embodiment provides a bionic frequency-doubled vibration cutting tool holder 100, including a clamping area 1 and an overhanging area 2, please refer to Figure 3-Figure 5 , wherein the clamping area 1 can be fixed on the tool holder 7 of the machine tool; the overhanging area 2 includes a mounting section and a slotted section, the mounting section has a mounting surface 4 parallel to the axis of the overhanging area 2, and the mounting surface 4 is used to fix the blade 5; the slotted section is connected to the clamping area 1 at one end away from the mounting section, and the slotted section is provided with a vibration groove 3, which is a U-shaped groove, the opening of the vibration groove 3 is located on the circumferential surface of the overhanging area 2, the bottom surface of the vibration groove 3 is a plane, and the bottom surface of the vibration groove 3 is parallel to the mounting surface 4.

[0044] The bionic double frequency vibration cutting tool holder 100 of the present invention has a vibration groove 3 in the overhang area 2. During the cutting process, the bionic double frequency vibration cutting tool holder 100 drives the blade 5 to perform vibration cutting. When applied to the finishing of difficult-to-process materials, compared with ordinary cutting, the present invention can greatly delay the wear of the blade 5, extend the service life of the blade 5, and reduce the surface roughness of the processed workpiece 6, thereby obtaining a good processing surface quality. In addition, the bionic double frequency vibration cutting tool holder 100 of the present invention uses the rotary motion of the processed workpiece 6 as the excitation source. Compared with the vibration cutting tool bar in the prior art, it does not require an external excitation power supply and has a lower cost. In addition, the bionic double frequency vibration cutting tool holder 100 of the present invention has a simple structure, is easy to manufacture, and is suitable for popularization and application.

[0045] The bionic frequency-doubled vibration cutting tool holder 100 of the present invention is based on the bionic principle.

[0046] Katydids, commonly known as katydids, rely on the unique sound characteristics of their wings and the structure of the sound generator, as shown in Figure 1. The structure consists of two parts: a sound frustum and a scraper. The scraper is a cantilever shape, and its key feature is the wrinkle structure on the scraper, which causes the scraper to vibrate at the same frequency. Figure 2As shown, spectrum analysis obtains vibrations of two frequencies, 3500Hz and 7000Hz. When the scraper moves on the fret and rubs against the fret, it vibrates and makes a sound. This vibration is a self-excited vibration (called flutter in mechanical processing). The wrinkled structure on the scraper gives it a unique vibration characteristic. The periodic separation of the scraper and the fret during vibration effectively reduces the friction and frictional heat during the scraping process, greatly reducing the wear of the scraper. Therefore, male katydids can rub their wings 50-60 million times throughout the summer. Based on the good wear-reducing effect of the scraper and the fret on the wings of the katydid mentioned above during the vibration process, the present invention extracts and simplifies the double-frequency vibration characteristics of the wrinkled structure on the scraper, and proposes a bionic double-frequency flutter cutting tool holder 100 based on the double-frequency vibration characteristics of the wrinkled structure on the scraper, as shown in FIG. Figure 3 As shown in the figure, the tool handle is equivalent to a scraper, and stable double-frequency chatter is stimulated during the cutting process, realizing bionic double-frequency chatter to offset the cutting roughness, as shown in the figure. Figure 7 and Figure 8 As shown, the back face of the blade 5 is separated from the machined surface in a small amplitude at a high frequency periodically, so that the cutting fluid is pumped into the cutting area for cooling and lubrication. On the one hand, the wear of the blade 5 is greatly reduced, the life of the blade 5 is extended, and the machining efficiency is improved. On the other hand, the overlapping tracks generated by the double frequency reduce the roughness of the machined surface, improve the machining quality of the machined surface, and meet the surface quality requirements of the fine machining.

[0047] In this specific embodiment, the vibration groove 3 is located on the side of the axial length midline of the slotting area close to the clamping area 1. In practical applications, the opening position of the vibration groove 3 can be adjusted according to actual working conditions to meet the vibration parameter requirements during the processing, while improving the flexibility and adaptability of the bionic frequency-doubling vibration cutting tool holder 100.

[0048] The mounting surface 4 is coplanar with the axis of the overhanging area 2, and the opening and bottom surface of the chattering groove 3 are respectively located on both sides of the axis of the overhanging area 2. In this specific embodiment, the material is removed from the end of the cylindrical overhanging area 2 away from the clamping area 1 to obtain a mounting section, and the mounting section has an L-shaped notch to form the mounting surface 4, the mounting surface 4 is coplanar with the axis of the overhanging area 2, and the other side of the notch of the mounting section is perpendicular to the axis of the overhanging area 2, the opening of the chattering groove 3 is located on the circumferential surface of the overhanging area 2 away from the mounting section, and the slotting depth of the chattering groove 3 is greater than the radius of the overhanging area 2. In practical applications, the spacing between the chattering groove 3 and the notch of the mounting section and the slotting depth of the chattering groove 3 can be adjusted according to actual working conditions to ensure that the vibration parameters of the tool handle are within the effective vibration parameter range.

[0049] In this specific embodiment, the side of the vibration groove 3 is perpendicular to the axis of the overhanging area 2, and the two side surfaces of the vibration groove 3 are arranged in parallel to reduce the difficulty of processing. In practical applications, the angles of the two side surfaces of the vibration groove 3 can also be adjusted according to actual working conditions to meet different tool handle vibration parameter requirements.

[0050] It should be explained here that the number of the vibration groove 3 is one, which ensures the structural strength of the tool handle and improves the processing reliability of the tool handle while meeting the double frequency vibration of the tool handle during the cutting process.

[0051] Specifically, the clamping area 1 is a rectangular parallelepiped structure, and the clamping area 1 can cooperate with the fastening screws 8 of the tool holder 7 to achieve fixation, thereby ensuring that the tool handle is clamped stably and providing a strong guarantee for cutting processing.

[0052] In addition, it should be noted that the bionic frequency-doubled vibration cutting tool holder 100 of the present invention can be made of materials such as stainless steel, titanium alloy, aluminum alloy, etc., to ensure the structural strength of the tool holder and improve the adaptability of the tool holder.

[0053] Embodiment 2

[0054] The present embodiment provides a cutting tool, comprising a blade 5 and a bionic double frequency vibration cutting tool holder 100 of the first embodiment, wherein the blade 5 is fixed to the mounting surface 4, and the blade 5 can contact the workpiece 6 to be processed. The rotary motion of the workpiece 6 is used as an excitation source to input energy into the cutting tool, so that the overhanging area 2 drives the blade 5 to vibrate. When the blade 5 is cutting the workpiece 6, double frequency vibration occurs in the cutting speed direction and the cutting depth direction, and the vibration parameters of the tool holder are ensured to be within the effective vibration parameter range.

[0055] The cutting tool of the present invention can reduce the wear of the blade 5, extend the service life of the blade 5, and improve the processing quality of the processed surface, and is suitable for the fine processing of difficult-to-process materials. By adjusting the slot position and size of the chattering slot 3 and the specifications of the overhanging area 2 and other parameters, the double frequency vibration mode of the tool handle can be controlled, and the amplitude and frequency can be adjusted.

[0056] In this specific embodiment, the blade 5 is detachably connected to the mounting section, and a screw connection method can be adopted. The connection is tight and the assembly and disassembly are convenient, so the blade 5 is easy to replace and maintain.

[0057] In practical applications, an acceleration sensor 9 can also be set in the installation section. The acceleration sensor 9 is communicated with the external vibration signal acquisition system 10 to monitor the vibration of the blade 5. The vibration signal acquisition system 10 is set to adjust the processing parameters according to the monitored vibration conditions, improve the degree of cutting automation, and further improve the processing quality of the cutting tool.

[0058] It should also be noted that when the cutting tool of the present invention is applied to difficult-to-process materials, the materials of the processed workpiece 6 include aluminum / magnesium / copper alloys, stainless steel, titanium alloys, high-temperature alloys, high-strength steels and composite materials, etc., which can effectively improve the processing quality of difficult-to-process materials and extend the service life of the cutting tool.

[0059] Embodiment 3

[0060] The present embodiment provides a cutting tool, including the bionic double frequency vibration cutting tool holder 100 of the first embodiment. The bionic double frequency vibration cutting tool holder 100 includes a rectangular clamping area 1 and a cylindrical overhanging area 2 with a vibration groove 3. The clamping area 1 has a size of 100x30x35mm (length, width, height). The fastening screw 8 is against the top surface of the clamping area 1, and the bottom surface of the clamping area 1 is fixed to the bottom surface of the tool holder 7, so that the bionic double frequency vibration cutting tool holder 100 is fixed on the machine tool. The material of the tool handle is aluminum alloy 6061. One end of the overhang area 2 is fixed to the clamping area 1, and the other end is a free cantilever. The cylinder diameter of the overhang area 2 is 30mm. The overhang area 2 includes a slotted section and a mounting section. The slotted section is close to the fixed end of the overhang area 2. The opening of the chatter groove 3 faces downward, with a width of 5mm and a depth of 19mm. The bottom surface of the chatter groove 3 is a plane. The distance between the center line of the chatter groove 3 and the front end surface of the tool handle is 42.5mm. The chatter groove 3 is processed using a CNC milling cutter. After slotting, the rigidity of the tool handle is weakened, and vibration is easier to excite. The mounting surface is set at the center surface of the free end of the overhang area 2, with a width of 13mm. A tool groove is provided at the center of the front end of the mounting surface for mounting the blade 5. An M4 threaded hole is provided at the bottom of the tool groove for fixing the blade 5. This area has the function of amplifying the amplitude of the chatter. The key dimensions of the bionic frequency-doubling vibration cutting tool holder 100 are the position of the slot, the size of the vibration slot 3, and the length and diameter of the overhang area 2. Changing these parameters can adjust the modal parameters of the tool holder, and then regulate the vibration parameters such as the amplitude and frequency of the tool bar during the processing to meet different processing conditions.

[0061] The material of the workpiece 6 is GH4169 high temperature alloy, the cutting parameters are: cutting line speed 30m / min, feed 0.1mm / r, cutting depth 0.2mm, and the blade 5 is a round turning blade 5 of Sandvik company model RCMT 10T3 M0-SM 1105, such as Figure 6 In the machining process of the cutting tool shown in FIG. 1 , the bionic frequency-doubled vibration cutting tool holder 100 is mounted on the CNC lathe tool holder 7. The triaxial acceleration sensor 9 is attached to the mounting surface to measure the vibration in three directions. The triaxial acceleration sensor 9 is produced by the American Dytran Company and the model is 3133D15. The lathe is turned on for cutting and the vibration is measured. The measurement results are shown in FIG. Fig. 9 As shown, Fig. 9 It is the time domain vibration curve in three directions. The vibration is mainly divided into along the cutting speed and along the cutting depth. The vibration amplitude in the feed direction is small and negligible. At the same time, the chatter frequency is relatively stable. Fig.10 It is the spectrum analysis of vibration in the shear speed direction. The vibration frequency is mainly distributed around 5000Hz. Fig.11 It shows the spectrum analysis of the vibration in the cutting depth direction. The vibration frequency is about 10000 Hz, and the vibration in two directions forms a double frequency vibration.

[0062] Then, a comparative experiment on the life and roughness of blade 5 was conducted. A traditional cutting experiment was conducted using a Sandvik toolholder that matched the blade 5. The model of the toolholder was SRDCN2525M10-A. A vibration cutting experiment was conducted using a bionic frequency-doubling vibration cutting toolholder 100. The life of blade 5 was compared by comparing the cutting distance when the maximum wear of the back face of blade 5 was VBmax=0.3mm. At the same time, the surface roughness of the machined surface was measured during the blade 5 life experiment to compare the surface roughness. A handheld microscope (Dino-Lite AM73915MZT) was used to observe the two-dimensional morphology of the surface of the machined workpiece 6 and the wear of the back face of blade 5, with a maximum magnification of 200 times. At the same time, a roughness tester (MahrM300C) was used to measure the surface roughness, and the average value was calculated by measuring 5 times. Fig.12 As shown in the figure, under the cutting parameters of cutting line speed 30m / min, feed rate 0.1mm / r, cutting depth 0.2mm, the life of the blade 5 of the chatter cutting is 5 times that of the ordinary cutting blade 5. Although the machined surface of the chatter cutting has surface vibration lines that fluctuate along the cutting speed direction compared with the ordinary cutting, such as Fig.13 As shown, the machined surface roughness value of chatter cutting is smaller than that of normal cutting, such as Fig.14 This shows that under this process condition, bionic vibration cutting tool holder cutting can significantly reduce the wear of the blade 5, extend the life of the blade 5, reduce the roughness of the processed surface, and improve the quality of the processed surface.

[0063] Embodiment 4

[0064] This embodiment provides a processing machine tool, including the bionic frequency-doubled vibration cutting tool holder 100 of the first embodiment, so as to improve the processing quality of the processing machine tool.

[0065] Embodiment 5

[0066] This embodiment provides a cutting method, using the cutting tool of embodiment 2, the cutting tool is installed on the tool holder 7 of the machine tool, the machine tool drives the workpiece 6 to rotate, the blade 5 contacts the workpiece 6, and the overhang area 2 drives the blade 5 to vibrate in the cutting speed direction and the cutting depth direction.

[0067] In the actual machining process, the workpiece material and cutting parameters are selected, the cutting tool is installed on the machine tool holder 7, and the machine tool is turned on for cutting. During the cutting process, the rotation of the workpiece 6 is used as the excitation source of the vibration cutting tool holder, and energy is input into the overhang area 2 where the vibration groove 3 is set. The overhang area 2 drives the blade 5 to vibrate, so that the blade 5 has a double frequency vibration in the cutting speed direction and the cutting depth direction while cutting the workpiece, and ensures that the vibration parameters of the tool holder are within the effective vibration parameter range. During the machining process, the machining parameters can also be adjusted according to the machining requirements, including the cutting line speed, cutting depth and feed rate.

[0068] It should be noted that, in this specific embodiment, the vibration frequency of the blade 5 in the cutting depth direction is twice the vibration frequency in the cutting speed direction, and the vibration trajectory of the blade 5 is in an 8-shape, and the trajectory is staggered to reduce the height of the vibration marks, thereby reducing the roughness of the processed surface.

[0069] The bionic frequency-doubled vibration cutting tool holder 100 of the present invention is designed with a vibration groove 3 so that the tool holder can excite stable frequency-doubled vibration in both the cutting speed and cutting depth directions during the machining process; the high-frequency small-amplitude separation of the back face reduces the wear of the blade 5, prolongs the life of the blade 5, and the frequency-doubled trajectory overlaps, thereby improving the machining quality of the machined surface, and is suitable for the finishing of difficult-to-machine materials. By adjusting the opening position and size of the vibration groove 3, the length of the overhanging area 2, the diameter of the cylindrical part and other parameters, the frequency-doubled vibration mode of the tool holder can be controlled, and the amplitude and frequency can be adjusted.

[0070] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A bionic frequency-doubled vibration cutting tool holder, characterized in that: include: A clamping area, the clamping area being capable of being fixed to a tool holder of a machine tool; The overhanging area includes a mounting section and a slotted section, the mounting section has a mounting surface parallel to the axis of the overhanging area, and the mounting surface is used to fix the blade; the slotted section is connected to the clamping area at one end away from the mounting section, and the slotted section is provided with a flutter groove, which is a U-shaped groove, the opening of the flutter groove is located on the circumferential surface of the overhanging area, the bottom surface of the flutter groove is a plane, and the bottom surface of the flutter groove is parallel to the mounting surface.

2. The bionic frequency-doubled vibration cutting tool holder according to claim 1, characterized in that: The vibration groove is located on a side of the axial length midline of the slotted area close to the clamping area.

3. The bionic frequency-doubled vibration cutting tool holder according to claim 1, characterized in that: The mounting surface is coplanar with the axis of the overhanging area, and the opening and the bottom surface of the vibration groove are respectively located on both sides of the axis of the overhanging area.

4. The bionic frequency-doubled vibration cutting tool holder according to claim 1, characterized in that: The side surfaces of the flutter groove are perpendicular to the axis of the overhanging area.

5. The bionic frequency-doubled vibration cutting tool holder according to any one of claims 1 to 4, characterized in that: The clamping area is a rectangular parallelepiped structure, and the clamping area can cooperate with the fastening screws of the tool holder to achieve fixation.

6. A cutting tool, comprising a blade, characterized in that: It also includes the bionic double-frequency vibration cutting tool holder as described in any one of claims 1 to 5, wherein the blade is fixed to the mounting surface, the blade can contact the workpiece, the rotary motion of the workpiece is used as an excitation source, and energy is input into the cutting tool to realize the vibration of the blade driven by the overhanging area, and the blade has double-frequency vibration in the cutting speed direction and the cutting depth direction while cutting the workpiece.

7. The cutting tool according to claim 6, characterized in that: The blade is detachably connected to the mounting section.

8. The cutting tool according to claim 6, characterized in that: The mounting section is provided with an acceleration sensor to monitor the vibration of the blade.

9. A cutting method, characterized in that: The cutting tool according to any one of claims 6 to 8 is characterized in that: the cutting tool is installed on a tool holder of a machine tool, the machine tool drives the workpiece to rotate, the blade contacts the workpiece, and the overhanging area drives the blade to vibrate in the cutting speed direction and the cutting depth direction.

10. The cutting method according to claim 9, characterized in that: The vibration frequency of the blade in the cutting depth direction is twice the vibration frequency in the cutting speed direction, and the vibration trajectory of the blade is an 8-shape.

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