Sawtooth-shaped circular knife ultrasonic cutting acoustic system

Abstract

The invention relates to the technical field of ultrasonic cutting, in particular to a sawtooth-shaped circular knife ultrasonic cutting acoustic system which comprises a main shaft, an ultrasonic vibrator and an ultrasonic cutting tool, the ultrasonic vibrator is connected with the main shaft, the ultrasonic cutting tool is installed on the side, away from the main shaft, of the ultrasonic vibrator, and a plurality of sawtooth grooves are formed in the peripheral face of the ultrasonic cutting tool. The sawtooth grooves are annularly distributed at equal intervals, and sawteeth are formed between every two adjacent sawtooth grooves. According to the ultrasonic cutting tool, the sawtooth grooves are formed in the peripheral surface of the ultrasonic cutting tool, so that the machining mode of the workpiece is intermittent cutting, the contact time of the ultrasonic cutting tool and the workpiece is shortened, and then friction resistance generated by contact between the ultrasonic cutting tool and the workpiece is reduced; heat generated between an ultrasonic cutting tool and a workpiece in the workpiece machining process can be greatly reduced, heat is released through non-contact gaps, and cutting force is reduced by reducing friction resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic cutting, and in particular to a serrated circular knife ultrasonic cutting acoustic system. Background Art

[0002] Ultrasonic cutting has the advantages of small cutting force, low cutting temperature, good machining quality, high machining efficiency, etc., and is widely used in the fields of aerospace, automobiles, high-speed rails, etc. An ultrasonic cutting machine tool is a high-end processing equipment for composite material processing. The ultrasonic cutting acoustic system is the core component of the ultrasonic cutting machine tool. The ultrasonic cutting tool is both a component of the ultrasonic cutting acoustic system and a tool for ultrasonic cutting. Therefore, during the ultrasonic cutting process, the ultrasonic cutting tool plays an important role.

[0003] Currently, the ultrasonic cutting tool is a circular knife (as Figure 1 shown), that is, the cross-section of the ultrasonic cutting tool is circular. However, since the ultrasonic cutting method of the circular knife is continuous cutting operation, the continuous cutting operation will affect the heat dissipation of the tool and the discharge of chips (that is, the chips are easily wound around the circular knife), which will further lead to the scrapping of the processed workpiece and the circular knife. Summary of the Invention

[0004] The applicant of the present invention aims at the above-mentioned disadvantages in the existing production technology and provides a serrated circular knife ultrasonic cutting acoustic system. By improving the structure of the ultrasonic cutting tool, a plurality of serrated grooves are provided on the outer peripheral surface of the tool, which can avoid the scrapping of the processed workpiece and the tool.

[0005] The technical solution adopted by the present invention is as follows: A serrated circular knife ultrasonic cutting acoustic system, comprising: a main shaft, an ultrasonic vibrator, and an ultrasonic cutting tool. The ultrasonic vibrator is connected to the main shaft, and the ultrasonic cutting tool is installed on the side of the ultrasonic vibrator away from the main shaft. The ultrasonic vibrator is used to generate ultrasonic frequency vibration and transmit the generated ultrasonic frequency vibration to the ultrasonic cutting tool, so that the ultrasonic cutting tool performs ultrasonic frequency vibration cutting on the workpiece. A plurality of serrated grooves are provided on the outer peripheral surface of the ultrasonic cutting tool, and the plurality of serrated grooves are distributed in an equally spaced annular shape. A serration is formed between two adjacent serrated grooves.

[0006] Thus, by providing a plurality of serrated grooves on the outer peripheral surface of the ultrasonic cutting tool, the workpiece is processed in a discontinuous cutting manner. Compared with the existing continuous cutting method, this method has a simple structure and is easy to operate, reducing the contact time between the ultrasonic cutting tool and the workpiece, thereby reducing the frictional resistance generated by the contact between the ultrasonic cutting tool and the workpiece. In this way, the heat generated between the ultrasonic cutting tool and the workpiece during the workpiece processing can be significantly reduced, and the heat is released through the non-contact gaps. By reducing the frictional resistance, the cutting force is reduced. At the same time, due to the discontinuous cutting and the serrated grooves can serve as the accommodation space for the chips, during the ultrasonic cutting process, the chips can be temporarily stored to avoid the chips winding around the ultrasonic cutting tool, thus avoiding the scrapping of the processed workpiece and the tool.

[0007] Furthermore, the serration includes: a secondary cutting surface and a primary cutting surface, and the intersection of the secondary cutting surface and the primary cutting surface is the tooth tip. Thus, through the design method of the secondary cutting surface, during ultrasonic cutting, the stress concentration of the ultrasonic cutting tool can be reduced to improve the fatigue life of the ultrasonic cutting tool during discontinuous cutting. In addition, it can also guide the entry and discharge of the chips, reduce the probability of secondary cutting of the chips, thereby improving the service life of the ultrasonic cutting tool and the machining quality of the workpiece; through the design method of the primary cutting surface, it is convenient for machining, simplifies the manufacturing process of the ultrasonic cutting tool, and ensures the geometric symmetry of the ultrasonic cutting tool.

[0008] Furthermore, the ultrasonic cutting tool further includes: a plurality of tooth roots, and the plurality of tooth roots are distributed in an equidistant circular shape. The tooth root, the primary cutting surface of the previous serration, and the secondary cutting surface of the next serration together form the serrated groove.

[0009] Furthermore, the cross-section of the tooth root is a straight line. Thus, the straight tooth root facilitates the machining of the entire ultrasonic cutting tool, making it easy to machine a circular ultrasonic cutting tool into a serrated ultrasonic cutting tool.

[0010] Furthermore, the cross-section of the tooth root is an arc line. Thus, the surface of the arc-line tooth root is relatively smooth, which can facilitate the discharge of the chips after ultrasonic cutting to further reduce the risk of chip entanglement with the ultrasonic cutting tool.

[0011] Furthermore, the secondary cutting surface includes: a secondary cutting edge and a secondary cutting curved surface. One end of the secondary cutting edge is connected to the primary cutting surface, the other end of the secondary cutting edge is connected to one end of the secondary cutting curved surface, and the other end of the secondary cutting curved surface is connected to the tooth root; the coordinates of any point A on the secondary cutting edge are: ; Coordinates of point A The expression is:

[0012] The width of the tooth tip has the following expression:

[0013] is the distance from the tooth tip to the axis of the ultrasonic cutting tool, is the radius of the secondary cutting edge, is the angle between the line connecting point D and the center of the ultrasonic cutting tool and the X-axis, and , is the number of saw teeth. Thus, the service life of the saw teeth is extended by the secondary cutting edge.

[0014] Furthermore, the width of the tooth root has the following expression:

[0015] is the distance from the tooth root to the axis of the ultrasonic cutting tool.

[0016] Furthermore, the volume of the saw tooth groove has the following calculation formula:

[0017] The thickness distribution function has the following calculation formula:

[0018] is the thickness of the equal-thickness section of the ultrasonic cutting tool; The arc length microelement of the secondary cutting surface (3021) has the following calculation formula: .

[0019] Furthermore, the ultrasonic cutting tool is also provided with a plurality of fan-shaped holes, and the plurality of fan-shaped holes are annularly distributed at equal intervals; the outer circle radius of the fan-shaped hole is r1, the inner circle radius is r2, and the fan angle of the fan-shaped hole is α; the outer arc length of the fan-shaped hole has the following calculation formula: ; The inner arc length of the fan-shaped hole has the following calculation formula: .

[0020] Thus, the multiple fan-shaped holes provided can reduce the stress generated during the operation of the ultrasonic cutting tool, thereby avoiding the risk of reducing the fracture of the ultrasonic cutting tool, and further avoiding the scrapping of the machined workpiece and the tool; the fan-shaped holes are radially distributed and are adapted to the ultrasonic cutting tool, which can reduce the generation of radial stress of the ultrasonic cutting tool.

[0021] Further, the ultrasonic vibrator includes: a piezoelectric transducer and a horn. The piezoelectric transducer is connected to the input end of the horn, and the output end of the horn is connected to the ultrasonic cutting tool.

[0022] The beneficial effects of the present invention are as follows: By providing a plurality of serrated grooves on the outer peripheral surface of the ultrasonic cutting tool, the workpiece is processed in an intermittent cutting manner. Compared with the existing continuous cutting method, this method has a simple structure and is easy to operate, so as to reduce the contact time between the ultrasonic cutting tool and the workpiece, and further reduce the frictional resistance generated by the contact between the ultrasonic cutting tool and the workpiece. In this way, the heat generated between the ultrasonic cutting tool and the workpiece during the workpiece processing can be greatly reduced, and the heat is released by using the non-contact gap. By reducing the frictional resistance, the cutting force is reduced. At the same time, due to the intermittent cutting and the serrated grooves can serve as a space for accommodating chips, during the ultrasonic cutting process, the chips can be temporarily stored to avoid the chips winding around the ultrasonic cutting tool, thereby avoiding the scrapping of the machined workpiece and the tool.

[0023] The present invention also has the following advantages: 1. Through the design method of the secondary cutting surface of the present invention, during ultrasonic cutting, the stress concentration of the ultrasonic cutting tool can be reduced to improve the fatigue life of the ultrasonic cutting tool during intermittent cutting. In addition, it can also guide the entry and discharge of chips, reduce the probability of secondary cutting of chips, thereby improving the service life of the ultrasonic cutting tool and the machining quality of the workpiece; through the design method of the primary cutting surface, it is convenient for machining, simplifies the manufacturing process of the ultrasonic cutting tool, and ensures the geometric symmetry of the ultrasonic cutting tool.

[0024] 2. The multiple fan-shaped holes provided in the present invention can reduce the stress generated during the operation of the ultrasonic cutting tool, thereby avoiding the risk of reducing the fracture of the ultrasonic cutting tool, and further avoiding the scrapping of the machined workpiece and the tool; the fan-shaped holes are radially distributed and are adapted to the ultrasonic cutting tool, which can reduce the generation of radial stress of the ultrasonic cutting tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a circular knife in the prior art; Figure 2 is a schematic structural diagram of the serrated circular knife ultrasonic cutting acoustic system in Embodiment 1; Figure 3 Partial sectional view of the zigzag circular knife ultrasonic cutting acoustic system of Example 1; Figure 4 Exploded view of the zigzag circular knife ultrasonic cutting acoustic system of Example 1; Figure 5 Structural schematic diagram of the zigzag circular knife of Example 1; Figure 6 Of Example 1 Figure 5 Enlarged schematic diagram of the local structure at A in; Figure 7 Bottom view of the zigzag circular knife of Example 1; Figure 8 Of Example 1 Figure 7 Enlarged schematic diagram of the local structure at B in; Figure 9 Structural schematic diagram of the sector-shaped hole of Example 1; Figure 10 Finite element simulation diagram of the circular knife displacement of the present invention; Figure 11 Finite element simulation diagram of the circular knife displacement of the zigzag circular knife of the present invention without sector-shaped holes and with 90 saw teeth; Figure 12 Finite element simulation diagram of the circular knife displacement of the zigzag circular knife of the present invention without sector-shaped holes and with 72 saw teeth; Figure 13 Finite element simulation diagram of the circular knife displacement of the zigzag circular knife of the present invention without sector-shaped holes and with 60 saw teeth; Figure 14 Finite element simulation diagram of the circular knife displacement of the zigzag circular knife of the present invention with sector-shaped holes and with 60 saw teeth.

[0026] Wherein: 1, main shaft; 2, ultrasonic oscillator; 201, piezoelectric transducer; 202, horn; 3, ultrasonic cutting tool; 301, sawtooth groove; 302, sawtooth; 3021, secondary cutting surface; 30211, secondary cutting edge; 30212, secondary cutting curved surface; 3022, main cutting surface; 3023, tooth tip; 303, tooth root; 304, sector-shaped hole. Specific embodiments

[0027] The following combines the drawings to illustrate the specific embodiments of the present invention.

[0028] Example 1: As Figures 2 to 14As shown in the figure, a zigzag circular knife ultrasonic cutting acoustic system includes: a main shaft 1, an ultrasonic vibrator 2, and an ultrasonic cutting tool 3. The ultrasonic vibrator 2 is connected to the main shaft 1, and the ultrasonic cutting tool 3 is installed on the side of the ultrasonic vibrator 2 away from the main shaft 1. The ultrasonic vibrator 2 is used to generate ultrasonic frequency vibrations and transmit the generated ultrasonic frequency vibrations to the ultrasonic cutting tool 3, so that the ultrasonic cutting tool 3 performs ultrasonic frequency vibration cutting on the workpiece. A plurality of serrated grooves 301 are formed on the outer peripheral surface of the ultrasonic cutting tool 3, and the plurality of serrated grooves 301 are distributed in an equally spaced circular shape. Serrations 302 are formed between two adjacent serrated grooves 301. Thus, by providing a plurality of serrated grooves 301 on the outer peripheral surface of the ultrasonic cutting tool 3, the processing method of the workpiece is intermittent cutting. Compared with the existing continuous cutting method, this method has a simple structure and is easy to operate, so as to reduce the contact time between the ultrasonic cutting tool 3 and the workpiece, and further reduce the frictional resistance generated by the contact between the ultrasonic cutting tool 3 and the workpiece. In this way, the heat generated between the ultrasonic cutting tool 3 and the workpiece during the workpiece processing can be greatly reduced, and the heat can be released by using the non-contact gap. By reducing the frictional resistance, the cutting force can be reduced. At the same time, due to the intermittent cutting and the serrated grooves 301 can be used as the accommodation space for the chips, during the ultrasonic cutting process, the chips can be temporarily stored to avoid the chips winding around the ultrasonic cutting tool 3, thereby avoiding the scrapping of the processed workpiece and the tool.

[0029] In other words, since the ultrasonic cutting method is intermittent cutting, when the ultrasonic cutting tool 3 is in use, when the serrated groove 301 corresponds to the workpiece, at this time, the ultrasonic cutting tool 3 does not perform the ultrasonic cutting action. Thus, on the one hand, the ultrasonic cutting tool 3 will not generate heat again. On the other hand, while not generating heat, it can also use the non-execution of the ultrasonic cutting action for heat dissipation. Such non-heat generation and heat dissipation can greatly reduce the heat generated between the ultrasonic cutting tool 3 and the workpiece during the workpiece processing, and release the heat by using the non-contact gap. By reducing the frictional resistance, the cutting force can be reduced.

[0030] It should be noted that: First, intermittent ultrasonic cutting means that: since the outer peripheral surface of the ultrasonic cutting tool 3 is arranged with alternating serrated grooves 301 and serrations 302, during the rotation of the ultrasonic cutting tool 3, when the serration 302 corresponds to the workpiece, the ultrasonic cutting tool 3 is used for ultrasonic cutting of the workpiece. When the serrated groove 301 corresponds to the workpiece, the ultrasonic cutting tool 3 does not perform ultrasonic cutting on the workpiece. Thus, it shows an ultrasonic cutting state for a period of time and a non-ultrasonic cutting state for a period of time, which is intermittent ultrasonic cutting; Second, during the rotation of the ultrasonic cutting tool 3, when the saw teeth 302 correspond to the workpiece, the ultrasonic cutting tool 3 can perform ultrasonic cutting on the workpiece. At this time, the chips generated during the ultrasonic cutting process enter the saw tooth groove 301 for temporary storage as the ultrasonic cutting tool 3 rotates. As the ultrasonic cutting tool 3 further rotates, when the saw tooth groove 301 is released from the restraint of the ultrasonic cutting tool 3, these temporarily stored chips can be discharged in a timely manner. That is, finally, through the multiple saw teeth 302 and the multiple saw tooth grooves 301, it is manifested as intermittent cutting, intermittent chip discharge, and intermittent heat dissipation.

[0031] In this embodiment, the saw tooth 302 includes a secondary cutting surface 3021 and a primary cutting surface 3022, and the intersection of the secondary cutting surface 3021 and the primary cutting surface 3022 is the tooth tip 3023. Thus, through the design of the secondary cutting surface 3021, during ultrasonic cutting, the stress concentration of the ultrasonic cutting tool 3 can be reduced to improve the fatigue life of the ultrasonic cutting tool 3 during intermittent cutting. In addition, it can also guide the entry and discharge of chips, reduce the probability of secondary cutting of chips, thereby improving the service life of the ultrasonic cutting tool 3 and the machining quality of the workpiece; through the design of the primary cutting surface 3022, it is convenient for machining, simplifies the manufacturing process of the ultrasonic cutting tool 3, and ensures the geometric symmetry of the ultrasonic cutting tool 3.

[0032] In this embodiment, the ultrasonic cutting tool 3 further includes a plurality of tooth roots 303. The plurality of tooth roots 303 are distributed in an equally spaced circular pattern. The tooth root 303, the primary cutting surface 3022 of the previous saw tooth 302, and the secondary cutting surface 3021 of the next saw tooth 302 together form the saw tooth groove 301.

[0033] In this embodiment, the cross-section of the tooth root 303 is a straight line. Thus, the straight tooth root 303 facilitates the machining of the entire ultrasonic cutting tool 3, so as to process the circular ultrasonic cutting tool 3 into an ultrasonic cutting tool 3 with saw teeth 302.

[0034] It should be noted that: the cross-section refers to a plane perpendicular to the axis of the ultrasonic cutting tool 3.

[0035] In this embodiment, the secondary cutting surface 3021 includes a secondary cutting edge 30211 and a secondary cutting curved surface 30212. One end of the secondary cutting edge 30211 is connected to the primary cutting surface 3022, the other end of the secondary cutting edge 30211 is connected to one end of the secondary cutting curved surface 30212, and the other end of the secondary cutting curved surface 30212 is connected to the tooth root 303; the coordinates of any point A on the secondary cutting edge 30211 are: ; Coordinates of point A The expression is:

[0036] Tooth tip width The expression for (i.e., the distance between two adjacent tooth tops 3023) is:

[0037] is the distance from the tooth top 3023 to the axis of the ultrasonic cutting tool 3, is the radius of the secondary cutting edge 30211, is the angle between the line connecting point D and the center of the ultrasonic cutting tool 3 and the X-axis, and , is the number of saw teeth 302. Thus, the service life of the saw teeth 302 is extended by the secondary cutting edge 30211 (i.e., the secondary cutting edge 30211 is a curve rather than a single point).

[0038] It should be noted that: as Figures 6 to 8 shown, point D is the intersection of the tooth root 303 and the secondary cutting surface 30212 In this embodiment, the tooth root width The expression for is:

[0039] is the distance from the tooth root 303 to the axis of the ultrasonic cutting tool 3.

[0040] In this embodiment, the volume of the saw tooth groove 301 is calculated as:

[0041] The thickness distribution function is calculated as:

[0042] is the thickness of the equal-thickness section of the ultrasonic cutting tool 3; The arc length microelement of the secondary cutting surface 3021 is calculated as: .

[0043] In this embodiment, the ultrasonic cutting tool 3 is also provided with a plurality of fan-shaped holes 304, and the plurality of fan-shaped holes 304 are annularly distributed at equal intervals; the outer circle radius of the fan-shaped hole 304 is r1, the inner circle radius is r2, and the fan angle of the fan-shaped hole 304 is α; the outer arc length of the fan-shaped hole 304 is calculated as: ; The inner arc length of the fan-shaped hole 304 is calculated as: .

[0044] Thus, through the multiple fan-shaped holes 304 provided, the stress generated during the operation of the ultrasonic cutting tool 3 can be reduced, thereby avoiding the risk of reducing the fracture of the ultrasonic cutting tool 3, and further avoiding the scrapping of the machined workpiece and the tool; the fan-shaped holes 304 are radially distributed and are adapted to the ultrasonic cutting tool 3, which can reduce the generation of radial stress of the ultrasonic cutting tool 3.

[0045] In this embodiment, the ultrasonic vibrator 2 includes: a piezoelectric transducer 201 and a horn 202. The piezoelectric transducer 201 is connected to the input end of the horn 202, and the output end of the horn 202 is connected to the ultrasonic cutting tool 3.

[0046] It should be noted that: I. During ultrasonic cutting, by providing a serrated groove 301 and fan-shaped holes 304 on the ultrasonic cutting tool 3, the amplitude of the ultrasonic cutting tool 3 can be increased to improve the ultrasonic cutting efficiency in an intermittent manner, so as to ensure that the intermittent manner will not affect the machining efficiency of the workpiece; II. As Figures 10 to 14 shown, the amplitude of the circular knife is 4.52 μm, the amplitude of the serrated circular knife without fan-shaped holes 304 and with 90 serrations is 6.34 μm, the amplitude of the serrated circular knife without fan-shaped holes 304 and with 72 serrations is 10.07 μm, the amplitude of the serrated circular knife without fan-shaped holes 304 and with 60 serrations is 14.80 μm, and the amplitude of the serrated circular knife with fan-shaped holes 304 and with 60 serrations is 16.6 μm. Compared with the ordinary circular knife, the amplitudes of the serrated circular knife without fan-shaped holes 304 and with 90 serrations, the serrated circular knife without fan-shaped holes 304 and with 72 serrations, the serrated circular knife without fan-shaped holes 304 and with 60 serrations, and the serrated circular knife with fan-shaped holes 304 and with 60 serrations are increased by 40%, 123%, 227%, and 267% respectively. Therefore, the fewer the number of serrations, the greater its amplitude (the number of serrations is inversely proportional to the amplitude), and providing fan-shaped holes 304 can increase the amplitude of the tool compared with not providing fan-shaped holes 304.

[0047] The working process of the serrated circular knife ultrasonic cutting acoustic system of the present invention is as follows: First, the entire serrated circular knife ultrasonic cutting acoustic system is installed on the machine tool through the main shaft 1; finally, the ultrasonic generator (not shown in the figure) is started, the piezoelectric transducer 201 converts the ultrasonic frequency electrical signal output by the ultrasonic generator into ultrasonic frequency vibration, the horn 202 amplifies the ultrasonic frequency vibration generated by the piezoelectric transducer 201, and transmits it to the ultrasonic cutting tool 3, and the ultrasonic cutting tool 3 rotates counterclockwise (as Figure 3The workpiece is subjected to intermittent ultrasonic vibration cutting (as shown). During the ultrasonic cutting process, the chips generated during the ultrasonic cutting process are temporarily stored in the serrated groove 301, and as the ultrasonic cutting tool 3 rotates counterclockwise, the chips stored in the serrated groove 301 can be discharged (after the serrated groove 301 is released from the restraint of the tool).

[0048] The difference from the first embodiment is that the cross-section of the tooth root 303 is an arc line. Thus, the surface of the tooth root 303 with the arc line is relatively smooth, which can facilitate the discharge of chips after ultrasonic cutting, so as to further reduce the risk of chips winding around the ultrasonic cutting tool 3.

[0049] In summary, the present invention is provided with a plurality of serrated grooves 301 on the outer peripheral surface of the ultrasonic cutting tool 3, so that the processing mode of the workpiece is intermittent cutting. Compared with the existing continuous cutting mode, this mode has a simple structure and is easy to operate, so as to reduce the contact time between the ultrasonic cutting tool 3 and the workpiece, and further reduce the frictional resistance generated by the contact between the ultrasonic cutting tool 3 and the workpiece. In this way, the heat generated between the ultrasonic cutting tool 3 and the workpiece during the workpiece processing can be greatly reduced, and the heat is released through the non-contact gap. By reducing the frictional resistance, the cutting force is reduced. At the same time, due to the intermittent cutting and the serrated groove 301 can be used as a chip accommodating space, during the ultrasonic cutting process, the chips can be temporarily stored to avoid the chips winding around the ultrasonic cutting tool 3, thereby avoiding the scrapping of the processed workpiece and the tool.

[0050] The above description is an explanation of the present invention, not a limitation of the invention. The scope defined by the present invention is referred to the claims, and any form of modification can be made within the protection scope of the present invention.

Claims

1. A zigzag circular knife ultrasonic cutting acoustic system, characterized in that, Comprising: A main shaft (1), and An ultrasonic oscillator (2), the ultrasonic oscillator (2) being connected to the main shaft (1); An ultrasonic cutting tool (3), the ultrasonic cutting tool (3) being mounted on a side of the ultrasonic oscillator (2) away from the main shaft (1), the ultrasonic oscillator (2) being configured to generate ultrasonic frequency vibrations and transmit the generated ultrasonic frequency vibrations to the ultrasonic cutting tool (3) so that the ultrasonic cutting tool (3) performs ultrasonic frequency vibration cutting on a workpiece. A plurality of serrated grooves (301) are formed on an outer peripheral surface of the ultrasonic cutting tool (3), and the plurality of serrated grooves (301) are distributed in an equidistant annular pattern. A serration (302) is formed between two adjacent serrated grooves (301); The ultrasonic cutting tool (3) is further provided with a plurality of fan-shaped holes (304), and the plurality of fan-shaped holes (304) are distributed in an equidistant annular pattern.

2. The serrated circular knife ultrasonic cutting acoustic system according to claim 1, characterized in that: The serration (302) includes: A secondary cutting surface (3021) and a primary cutting surface (3022), and an intersection point of the secondary cutting surface (3021) and the primary cutting surface (3022) is a tooth tip (3023).

3. The zigzag circular knife ultrasonic cutting acoustic system according to claim 2, characterized in that: The ultrasonic cutting tool (3) further includes: A plurality of tooth roots (303), the plurality of tooth roots (303) being distributed in an equidistant annular pattern, and the tooth roots (303), the primary cutting surface (3022) of the previous serration (302), and the secondary cutting surface (3021) of the next serration (302) together form the serrated groove (301).

4. The zigzag circular knife ultrasonic cutting acoustic system according to claim 3, wherein: The cross-section of the tooth root (303) is a straight line.

5. The zigzag circular knife ultrasonic cutting acoustic system according to claim 3, characterized in that: The cross-section of the tooth root (303) is an arc line.

6. The zigzag circular knife ultrasonic cutting acoustic system according to claim 3, characterized in that: The secondary cutting surface (3021) includes: A secondary cutting edge (30211) and a secondary cutting curved surface (30212), one end of the secondary cutting edge (30211) being connected to the primary cutting surface (3022), the other end of the secondary cutting edge (30211) being connected to one end of the secondary cutting curved surface (30212), and the other end of the secondary cutting curved surface (30212) being connected to the tooth root (303); The coordinates of any point A on the secondary cutting edge (30211) are as follows: ; Coordinates of point A The expression is as follows: Tooth tip width The expression is as follows: is the distance from the tooth tip (3023) to the axis of the ultrasonic cutting tool (3), is the radius of the secondary cutting edge (30211), is the angle between the line connecting point D and the center of the ultrasonic cutting tool (3) and the X-axis, and , is the number of the saw teeth (302).

7. The zigzag circular knife ultrasonic cutting acoustic system according to claim 6, characterized in that: Tooth root width The expression is: is the distance from the tooth root (303) to the axis of the ultrasonic cutting tool (3).

8. The zigzag circular knife ultrasonic cutting acoustic system according to claim 7, wherein: The volume of the sawtooth groove (301) is calculated by the formula: Thickness distribution function The calculation formula is as follows: is the thickness of the equal-thickness section of the ultrasonic cutting tool (3); The arc length element of the secondary cutting surface (3021) is calculated by the formula: 。 9. The zigzag circular blade ultrasonic cutting acoustic system according to claim 1, characterized in that: The outer circle radius of the fan-shaped hole (304) is r1, the inner circle radius is r2, and the sector angle of the fan-shaped hole (304) is α; The outer arc length of the sector-shaped hole (304) The calculation formula is as follows: ； The inner arc length of the sector hole (304) is calculated by the formula: 。 10. The serrated circular knife ultrasonic cutting acoustic system according to claim 1, characterized in that: The ultrasonic oscillator (2) includes: A piezoelectric transducer (201) and a horn (202), the piezoelectric transducer (201) being connected to an input end of the horn (202), and an output end of the horn (202) being connected to the ultrasonic cutting tool (3).

Images