Novel double-bend ultrasonic cutting device

Abstract

The invention provides a novel double-bend ultrasonic cutting device, the cutting device is provided with a body and two coil racks, the body is provided with two excitation areas, namely an excitation area I and an excitation area II, coils are wound on the coil racks, the coils provide excitation magnetic fields for the excitation area I and the excitation area II, and the coil racks are wound on the coil racks. The two coil racks wound with coils are arranged on the peripheries of the first excitation area and the second excitation area in a sleeving mode respectively, a blade is arranged at the head of the body through a tool bolt, and the first excitation area provides bending vibration parallel to the surface of the blade under the action of an excitation magnetic field. The second excitation area provides bending vibration perpendicular to the surface of the blade under the action of the excitation magnetic field, and therefore a space oval track is coupled at the position of a tool nose of the blade. Composite bending vibration in two directions is realized by changing the direction of a bias magnetic field, so that the elliptical track of a tool nose is coupled, the cutting force is reduced, the surface quality of a workpiece is improved, and blade abrasion is reduced.

Description

Technical Field

[0001] The present invention relates to an ultrasonic machining device, and in particular to a double-bend ultrasonic cutting device. The technology combined with actual machining can be applied to the machining of difficult-to-machine materials, composite materials and other materials, mainly to improve the efficiency of the cutting process, increase the service life of the tool, and reduce the tool machining stress. Background Art

[0002] Ultrasonic cutting is a method of assisting traditional cutting processing with ultrasonic vibration. It is mainly used to improve cutting performance, improve processing quality and solve the processing problems of difficult-to-process materials. This technology combines the high-frequency characteristics of ultrasonic vibration with the mechanical effects of traditional cutting and has been widely used in aerospace, precision manufacturing, automotive industry and electronic manufacturing.

[0003] The ultrasonic transducer in the ultrasonic machining device is the core component of the ultrasonic vibration system. It converts the ultrasonic frequency electrical energy generated by the ultrasonic transmitter into mechanical vibration energy, then amplifies and focuses the amplitude through the horn, and transmits the vibration to the tool head, thereby realizing ultrasonic machining of the workpiece. Currently, the commonly used ultrasonic transducers are mainly divided into two categories: magnetostrictive transducers and piezoelectric transducers.

[0004] The magnetostrictive effect refers to the fact that when a magnetostrictive material is subjected to a magnetic field, the originally disordered magnetic molecules inside it will rearrange themselves along the direction of the magnetic field, causing a change in the length or volume of the material. This effect and its inverse effect are both based on the conversion function between magnetic energy and mechanical energy. Giant magnetostrictive materials have a higher electromechanical coupling coefficient, which enables the magnetostrictive effect and its inverse effect to more efficiently achieve the mutual conversion between magnetic energy and mechanical energy. Summary of the invention

[0005] In view of the above problems, the present invention proposes a novel double-bend ultrasonic cutting device which can effectively reduce cutting force, improve workpiece surface quality and reduce blade wear.

[0006] The technical solution adopted by the present invention is: A novel double-bend ultrasonic cutting device, the cutting device has a main body and two coil frames, the main body has two excitation areas, namely excitation area one and excitation area two, a coil is wound on the coil frame, the coil provides an excitation magnetic field to the excitation area one and the excitation area two, the two coil frames wound with coils are respectively sleeved on the periphery of the excitation area one and the excitation area two, a blade is arranged at the head of the main body through a tool bolt, the excitation area one provides a bending vibration parallel to the blade surface under the action of the excitation magnetic field, and the excitation area two provides a bending vibration perpendicular to the blade surface under the action of the excitation magnetic field, thereby coupling a spatial elliptical trajectory at the tip of the blade.

[0007] Further optimized, The main body has a central column, which is used to place the magnetostrictive block and the magnet; the central column has a cross bracket, a partition, a knife seat and a base; the partition is located in the middle of the central column, and cross brackets are arranged on both sides of the partition, the partition is used to separate the magnetostrictive blocks on the cross brackets 7 on both sides, the knife seat is arranged at the end of the cross bracket on one side, and the base is arranged at the end of the cross bracket on the other side.

[0008] Further optimized, A first through hole is formed on the base, a second through hole is formed on the cross bracket, a third through hole is formed on the partition, and a threaded hole is formed on the knife holder. Pre-tightening bolts are used to pass through the cross bracket, the partition, and the cross bracket from the base in sequence, and finally connected to the threaded hole on the knife holder.

[0009] Further optimized, A first positioning hole is opened on the side of the base, a second positioning hole is opened on the two end faces of the cross bracket, a third positioning hole is opened on the two side end faces of the partition, and a fourth positioning hole is opened on the side of the knife seat. Four positioning holes are set on each face, and a positioning pin is placed in each positioning hole.

[0010] Further optimized, The cross bracket 7 forms four areas for placing cylindrical magnetostrictive blocks, which areas match the shape of the magnetostrictive blocks. At the bottom of each area, the originally right-angled part is set as a chamfered slope, and a matching slope matching the chamfered slope is set on the magnetostrictive block.

[0011] Further optimized, A first mounting groove is provided on the side of the base close to the cross bracket, a magnet mounting hole is provided on the partition, and a second magnet mounting groove is provided on the side of the knife holder close to the cross bracket 7; when the magnetostrictive block is installed, the magnets placed in the first mounting groove, the magnet mounting hole and the second magnet mounting groove fit with the end of the magnetostrictive block.

[0012] Further optimized, A plurality of magnet placement holes are provided on each separator of the cross bracket for placing magnets providing a bias magnetic field, and a counterweight hole is also provided on the separator.

[0013] Further optimized, The magnetostrictive blocks on both sides of the blade plane are divided into two parts, the two magnetostrictive blocks on one side of the excitation area 1 are the first area magnetostrictive blocks, and the other side is the second area magnetostrictive blocks; the two magnetostrictive blocks on one side of the excitation area 2 are the third area magnetostrictive blocks, and the other side is the fourth area magnetostrictive blocks; The poles of the magnets at both ends of the first-region magnetostrictive block and the second-region magnetostrictive block are arranged in opposite directions, and the bias magnetic fields acting on the first-region magnetostrictive block and the second-region magnetostrictive block will be in opposite directions. When alternating current is passed through the excitation coil to generate an alternating magnetic field, the first-region magnetostrictive block and the second-region magnetostrictive block will have opposite deformation tendencies, thereby realizing one-dimensional bending vibration.

[0014] The magnetic pole arrangement directions of the magnets at both ends of the third-region magnetostrictive block and the fourth-region magnetostrictive block are respectively the same as those of the first-region magnetostrictive block and the second-region magnetostrictive block, but the difference is that the overall phase angle is 90° with the first-region magnetostrictive block and the second-region magnetostrictive block. Therefore, the one-dimensional bending vibration direction generated by the third-region magnetostrictive block and the fourth-region magnetostrictive block will have a 90° phase difference with the one-dimensional bending vibration direction generated by the first-region magnetostrictive block and the second-region magnetostrictive block, so the tool tip will couple a spatial elliptical trajectory.

[0015] Further optimized, The front end of the tool holder is in the shape of a stepped shaft, with chamfers or fillets between each step, and a mounting head at the end, on which the blade is fixed by a tool bolt.

[0016] Further optimized, The material of the coil frame is plastic, ceramic, metal or wood, and the material of the blade is preferably high-speed steel, cemented carbide, ceramic, cubic boron nitride, diamond, The materials of the base, tool bolts, partitions, brackets, tool holders, and pre-tightening bolts are preferably carbon steel, stainless steel, non-magnetic steel, and bearing steel; the materials of the magnets are preferably neodymium iron boron, samarium cobalt, aluminum nickel cobalt, and ferrite magnets; the materials of the magnetostrictive blocks are preferably nickel-titanium alloys, cobalt-iron alloys, and bismuth-iron oxides; The hysteresis expansion block and the cross bracket 7 are matched by gluing or welding, and the magnet and the first mounting groove, the magnet placement hole, the magnet mounting hole, and the second magnet mounting groove are matched by gluing or welding; The diameter of the wound coil is preferably 0.01-5 mm.

[0017] The device of the present invention realizes compound bending vibration in two directions (perpendicular to the direction of the blade and parallel to the direction of the blade) by changing the direction of the bias magnetic field, thereby coupling out an elliptical trajectory of the tool tip, reducing cutting force, improving workpiece surface quality, and reducing blade wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the double-bend ultrasonic cutting device of the present invention.

[0019] Figure 2 It is a schematic diagram of the separation of the body and the coil frame of the double-bend ultrasonic cutting device of the present invention.

[0020] Figure 3 It is an exploded view of the main body of the double-bend ultrasonic cutting device of the present invention.

[0021] Figure 4 The structure of the base of the present invention is shown in FIG. Figure 1 .

[0022] Figure 5 The structure of the base of the present invention is shown in FIG. Figure 2 .

[0023] Figure 6 It is a schematic diagram of the cross bracket structure of the present invention.

[0024] Figure 7 It is a schematic diagram of the structure of the magnetostrictive block of the present invention.

[0025] Figure 8 It is a schematic diagram of the partition structure of the present invention.

[0026] Fig. 9 It is a structural schematic diagram of the knife holder of the present invention.

[0027] Fig.10 Schematic diagram of the arrangement of the magnetic field and magnetic poles of the present invention.

[0028] Fig.11 Bending vibration modal diagrams in two directions (the z direction is the direction perpendicular to the blade, and the y direction is the direction parallel to the blade) provided by the present invention.

[0029] Fig.12 It is a vibration schematic diagram of the present invention.

[0030] In the figure, the main body 1, the coil frame 2, the tool bolt 3, the blade 4, the excitation area 1 5, the excitation area 2 6, the cross bracket 7, the partition 8, the tool holder 9, the base 10, the pre-tightening bolt 11, the magnetostrictive block 12, the magnet 13, the first through hole 14, the first mounting groove 15, the first positioning hole 16, the second through hole 17, the second positioning hole 18, the counterweight hole 19, the magnet placement hole 20, the chamfered inclined surface 21, the matching inclined surface 22, the third through hole 23, the magnet mounting hole 24, the third positioning hole 25, the threaded hole 26, the second magnet mounting groove 27, the fourth positioning hole 28, and the mounting head 29. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the description of the present invention, it is to be understood that the terms “center”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1 The figure shows the overall structure schematic diagram of a novel double-bend ultrasonic cutting device of the present invention. The proposed novel double-bend ultrasonic cutting device can effectively reduce cutting force, improve the quality of the workpiece surface, and reduce blade wear.

[0035] Reference Figure 1 The cutting device comprises a main body 1 and a coil frame 2 , wherein the coil frame 2 is used for winding the coil, and then the coil frame 2 is sleeved on the outer side of the main body 1 .

[0036] The innovation of the present invention is that two excitation areas are provided to provide vibrations in different directions. Figure 2 , which are respectively recorded as excitation area 1 5 and excitation area 2 6. Correspondingly, a coil frame 2 with a coil wound thereon is provided on the outside of each excitation area to provide an excitation magnetic field. In the present invention, preferably, the material of the coil frame 2 is plastic, ceramic, metal or wood, etc. A blade 4 is provided at the head of the main body 1 through a tool bolt 3. The device of the present invention realizes a composite bending vibration in two directions (perpendicular to the direction of the blade and parallel to the direction of the blade) by changing the direction of the bias magnetic field, thereby coupling out an elliptical trajectory of the tool tip, reducing cutting force, improving the surface quality of the workpiece, and reducing blade wear.

[0037] The blade 4 is used for cutting, and the material of the blade 4 is preferably high-speed steel, cemented carbide, ceramic, cubic boron nitride, diamond, etc.; the tool bolt 3 is used to fasten the blade 4 to the body 1, and the material of the tool bolt 3 is preferably carbon steel, stainless steel, non-magnetic steel and bearing steel, etc.

[0038] Reference Figure 3The main body 1 of the present invention has a central column and other related parts. The central column has a cross bracket 7, a partition 8, a knife seat 9 and a base 10. The partition 8 is located in the middle of the central column and is used to separate the magnetostrictive blocks 12 on both sides. Cross brackets 7 are arranged on both sides of the partition 8, and the cross brackets 7 on both sides are excitation areas. The knife seat 9 is arranged at the end of the cross bracket 7 on one side, and the base 10 is arranged at the end of the cross bracket 7 on the other side.

[0039] In order to make the parts on the central column relatively fixedly connected, through holes or threaded holes are provided in the middle of each component (cross bracket 7, partition plate 8, knife seat 9 and base 10). For the convenience of description, it is noted that the first through hole 14 (such as Figure 4 ), a second through hole 17 is opened on the cross bracket 7 (such as Figure 6 ), a third through hole 23 is opened on the partition 8 (such as Figure 8 ), a threaded hole 26 is provided on the tool holder 9 (such as Fig. 9 ). Pre-tightening bolts 11 are used to pass through the cross bracket 7, the partition 8, the cross bracket 7 from the base 10 in sequence, and finally connected with the threaded holes on the knife seat 9. The pre-tightening bolts 11 provide pre-tightening force for the entire device, and the materials used are carbon steel, stainless steel, non-magnetic steel and bearing steel.

[0040] The pre-tightening bolt 11 is used to fix the components on the central column in the axial direction of the body 1. In order to prevent the components from rotating, multiple positioning holes are opened on the components (cross bracket 7, partition 8, knife seat 9 and base 10). For the convenience of description, it is recorded that the first positioning hole 16 is opened on the side of the base 10, the second positioning hole 18 is opened on the two end faces of the cross bracket 7, the third positioning hole 25 is opened on the two side end faces of the partition 8, and the fourth positioning hole 28 is opened on the side of the knife seat 9. There are 4 positioning holes on each surface, and positioning pins are placed in the positioning holes to ensure that the components will not rotate relative to each other.

[0041] like Figure 6 As shown, combined with Figure 2 , 3 The cross bracket 7 forms four areas for placing the magnetostrictive blocks 12 in a cylindrical shape (a chamfered rectangular parallelepiped), which match the shape of the magnetostrictive blocks 12. The cross bracket 7 is used to separate the magnetostrictive blocks 12 in each area. The originally right-angled portion is set as a chamfered slope 21 at the bottom of each area. The chamfered slope 21 can enhance the rigidity of the cross bracket 7. The magnetostrictive block 12 is provided with a matching slope 22 that matches the chamfered slope 21 (or the matching slope 22 can be slightly larger than the chamfered slope 21).

[0042] like Figure 5As shown, a first mounting groove 15 is provided on the side of the base 10 close to the cross bracket 7, a magnet mounting hole 24 is provided on the partition 8, and a second magnet mounting groove 27 is provided on the side of the knife seat 9 close to the cross bracket 7. When the magnetostrictive block 12 is installed, the magnet 13 placed in the first mounting groove 15, the magnet mounting hole 24, and the second magnet mounting groove 27 fits with the end of the magnetostrictive block 12.

[0043] The front end of the tool holder 9 is in the shape of a stepped shaft, with chamfers or fillets provided between each step, and a mounting head 29 provided at the end, on which the blade 4 is fixed by a tool bolt 3 .

[0044] The first mounting groove 15 , the magnet mounting hole 24 , and the second magnet mounting groove 27 are used to place the magnet 13 that provides a bias magnetic field.

[0045] Reference Figure 2 The one close to the base 10 is the excitation area 1 5 , and the one close to the knife seat 9 is the excitation area 2 6 .

[0046] After being biased by the bias magnetic field, the magnetostrictive block 12 in the excitation region 1 5 provides bending vibration parallel to the blade surface under the action of the excitation magnetic field.

[0047] After being biased by the bias magnetic field, the magnetostrictive block 12 in the excitation region 2 6 provides bending vibration perpendicular to the blade surface under the action of the excitation magnetic field.

[0048] like Figure 6 As shown, a plurality of magnet placement holes 20 are provided on each separator of the cross bracket 7 for placing the magnets 13 providing the bias magnetic field, and such placement can further enhance the strength of the bias magnetic field. A counterweight hole 19 is also provided on the separator, and the function of the counterweight hole 19 is to compensate for the unbalanced weight distribution of the ultrasonic device due to the placement of the blade, so as to make the center of gravity of the entire device as close to the center of the entire device as possible to ensure a better vibration shape.

[0049] The materials of the base 2, the partition 4, the bracket 5 and the knife seat 7 are preferably carbon steel, stainless steel, non-magnetic steel, bearing steel. The magnetostrictive block 12 and the cross bracket 7 are preferably glued or welded. The material of the magnetostrictive block 12 is preferably nickel-titanium alloy, cobalt-iron alloy, bismuth-iron oxide, etc. The material of the magnet 13 is preferably neodymium iron boron, samarium cobalt, aluminum nickel cobalt, ferrite magnet, etc. The magnet 13 and the first mounting groove 15, the magnet placement hole 20, the magnet mounting hole 24, and the second magnet mounting groove 27 are preferably glued or welded. The diameter of the wound coil is preferably 0.01-5mm.

[0050] Reference Figure 3 , 12The magnetostrictive blocks 12 on both sides of the blade 4 plane are divided into two parts. The two magnetostrictive blocks 12 on one side of the excitation region 1 5 are the first region magnetostrictive blocks 12.1, and the other side is the second region magnetostrictive blocks 12.2. The two magnetostrictive blocks 12 on one side of the excitation region 2 6 are the third region magnetostrictive blocks 12.3, and the other side is the fourth region magnetostrictive blocks 12.4.

[0051] Reference Fig.10 , 12 The poles of the magnets 13 at both ends of the first-region magnetostrictive block 12.1 and the second-region magnetostrictive block 12.2 are arranged in opposite directions, and the bias magnetic fields acting on the first-region magnetostrictive block 12.1 and the second-region magnetostrictive block 12.2 are in opposite directions. When alternating current is passed through the excitation coil, an alternating magnetic field is generated, and the first-region magnetostrictive block 12.1 and the second-region magnetostrictive block 12.2 will have opposite deformation tendencies, thereby realizing one-dimensional bending vibration.

[0052] Reference Fig.10 , 12 The magnetic pole arrangement directions of the magnets 13 at both ends of the third-region magnetostrictive block 12.3 and the fourth-region magnetostrictive block 12.4 are respectively the same as those of the first-region magnetostrictive block 12.1 and the second-region magnetostrictive block 12.2, except that the overall phase angle is 90° with the first-region magnetostrictive block 12.1 and the second-region magnetostrictive block 12.2. Therefore, the one-dimensional bending vibration direction generated by the third-region magnetostrictive block 12.3 and the fourth-region magnetostrictive block 12.4 will have a 90° phase difference with the one-dimensional bending vibration direction generated by the first-region magnetostrictive block 12.1 and the second-region magnetostrictive block 12.2, so the tool tip will couple a spatial elliptical trajectory.

[0053] The device of the present invention realizes compound bending vibration in two directions (perpendicular to the direction of the blade and parallel to the direction of the blade) by changing the direction of the bias magnetic field, thereby coupling out an elliptical trajectory of the tool tip, reducing cutting force, improving workpiece surface quality, and reducing blade wear.

Claims

1. A novel double-bend ultrasonic cutting device, characterized in that: The cutting device comprises a main body and two coil frames, wherein the main body is provided with two excitation areas, namely, excitation area 1 and excitation area 2, a coil is wound on the coil frame, and the coil provides an excitation magnetic field to the excitation area 1 and the excitation area 2, and the two coil frames with the coils wound thereon are respectively sleeved on the peripheries of the excitation area 1 and the excitation area 2, and a blade is arranged at the head of the main body through a tool bolt, The first excitation region provides bending vibration parallel to the blade surface under the action of the excitation magnetic field, and the second excitation region provides bending vibration perpendicular to the blade surface under the action of the excitation magnetic field, thereby coupling a spatial elliptical trajectory at the tip of the blade.

2. A novel double-bend ultrasonic cutting device according to claim 1, characterized in that: The main body has a central column, which is used to place the magnetostrictive block and the magnet; the central column has a cross bracket, a partition, a knife seat and a base; the partition is located in the middle of the central column, and cross brackets are arranged on both sides of the partition, the partition is used to separate the magnetostrictive blocks on the cross brackets 7 on both sides, the knife seat is arranged at the end of the cross bracket on one side, and the base is arranged at the end of the cross bracket on the other side.

3. A novel double-bend ultrasonic cutting device according to claim 2, characterized in that: A first through hole is formed on the base, a second through hole is formed on the cross bracket, a third through hole is formed on the partition, and a threaded hole is formed on the knife holder. Pre-tightening bolts are used to pass through the cross bracket, the partition, and the cross bracket from the base in sequence, and finally connected to the threaded hole on the knife holder.

4. A novel double-bend ultrasonic cutting device according to claim 3, characterized in that: A first positioning hole is opened on the side of the base, a second positioning hole is opened on the two end faces of the cross bracket, a third positioning hole is opened on the two side end faces of the partition, and a fourth positioning hole is opened on the side of the knife seat. Four positioning holes are set on each face, and a positioning pin is placed in each positioning hole.

5. A novel double-bend ultrasonic cutting device according to claim 4, characterized in that: The cross bracket 7 forms four areas for placing cylindrical magnetostrictive blocks, which areas match the shape of the magnetostrictive blocks. At the bottom of each area, the originally right-angled part is set as a chamfered slope, and a matching slope matching the chamfered slope is set on the magnetostrictive block.

6. A novel double-bend ultrasonic cutting device according to claim 5, characterized in that: A first mounting groove is provided on the side of the base close to the cross bracket, a magnet mounting hole is provided on the partition, and a second magnet mounting groove is provided on the side of the knife holder close to the cross bracket 7; when the magnetostrictive block is installed, the magnets placed in the first mounting groove, the magnet mounting hole and the second magnet mounting groove fit with the end of the magnetostrictive block.

7. A novel double-bend ultrasonic cutting device according to claim 6, characterized in that: A plurality of magnet placement holes are provided on each separator of the cross bracket for placing magnets providing a bias magnetic field, and a counterweight hole is also provided on the separator.

8. A novel double-bend ultrasonic cutting device according to claim 7, characterized in that: The magnetostrictive blocks on both sides of the blade plane are divided into two parts, the two magnetostrictive blocks on one side of the excitation area 1 are the first area magnetostrictive blocks, and the other side is the second area magnetostrictive blocks; the two magnetostrictive blocks on one side of the excitation area 2 are the third area magnetostrictive blocks, and the other side is the fourth area magnetostrictive blocks; The poles of the magnets at both ends of the magnetostrictive block in the first region and the magnetostrictive block in the second region are arranged in opposite directions, so the bias magnetic fields acting on the magnetostrictive block in the first region and the magnetostrictive block in the second region are in opposite directions. When alternating current is passed through the excitation coil, an alternating magnetic field is generated, and the magnetostrictive block in the first region and the magnetostrictive block in the second region have opposite deformation tendencies, thereby realizing one-dimensional bending vibration. The magnetic pole arrangement directions of the magnets at both ends of the third-region magnetostrictive block and the fourth-region magnetostrictive block are respectively the same as those of the first-region magnetostrictive block and the second-region magnetostrictive block, but the difference is that the overall phase angle is 90° with the first-region magnetostrictive block and the second-region magnetostrictive block. Therefore, the one-dimensional bending vibration direction generated by the third-region magnetostrictive block and the fourth-region magnetostrictive block will have a 90° phase difference with the one-dimensional bending vibration direction generated by the first-region magnetostrictive block and the second-region magnetostrictive block, so the tool tip will couple a spatial elliptical trajectory.

9. A novel double-bend ultrasonic cutting device according to claim 8, characterized in that: The front end of the tool holder is in the shape of a stepped shaft, with chamfers or fillets between each step, and a mounting head at the end, on which the blade is fixed by a tool bolt.

10. A novel double-bend ultrasonic cutting device according to claim 9, characterized in that: The material of the coil frame is plastic, ceramic, metal or wood, and the material of the blade is preferably high-speed steel, cemented carbide, ceramic, cubic boron nitride, diamond, The materials of the base, tool bolts, partitions, brackets, tool holders, and pre-tightening bolts are preferably carbon steel, stainless steel, non-magnetic steel, and bearing steel; the materials of the magnets are preferably neodymium iron boron, samarium cobalt, aluminum nickel cobalt, and ferrite magnets; the materials of the magnetostrictive blocks are preferably nickel-titanium alloys, cobalt-iron alloys, and bismuth-iron oxides; The hysteresis expansion block and the cross bracket 7 are matched by gluing or welding, and the magnet and the first mounting groove, the magnet placement hole, the magnet mounting hole, and the second magnet mounting groove are matched by gluing or welding; The diameter of the wound coil is preferably 0.01-5 mm.

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