Ultrasonic vibration knife handle device with variable vibration modes and grooving method

Abstract

The invention discloses an ultrasonic vibration knife handle device with a variable vibration mode and a grooving method, the ultrasonic vibration knife handle device comprises an ultrasonic vibration knife handle, an ultrasonic electric energy transmission primary side device and an ultrasonic generator, a knife is mounted at the lower end of a mode converter of the ultrasonic vibration knife handle, and the upper end of the mode converter is detachably connected with the lower end of an ultrasonic transducer; the upper end of the ultrasonic transducer is installed in the ultrasonic knife handle shell, a secondary side magnetic core structure is arranged on the side edge of the ultrasonic knife handle shell, the ultrasonic knife handle shell is further used for being connected with a machine tool spindle, and the upper end of the ultrasonic electric energy transmission primary side device is installed on the outer side of the machine tool spindle. The lower end of the primary side magnetic core structure is arranged above the secondary side magnetic core structure, parallel and opposite primary side magnetic core structures are arranged corresponding to the secondary side magnetic core structure, and the primary side magnetic core structures are connected with an ultrasonic generator. According to the invention, convenient switching of the vibration form is realized through the detachable mode converter, and the mode converter with different chute structures can be manufactured according to the processing requirement or the longitudinal / torsional amplitude ratio requirement and can be replaced according to the requirement, so that the matched vibration form is obtained.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic vibration technology, specifically to an ultrasonic vibration tool holder device with variable vibration modes and a grooving method. Background Technology

[0002] Ultrasonic vibration machining technology is based on the ultrasonic piezoelectric effect. It uses an ultrasonic generator to produce an electrical signal in the ultrasonic frequency band, driving an ultrasonic transducer to vibrate at the same frequency, which in turn causes the cutting tool to vibrate at a high frequency. This advanced machining technology effectively improves the machinability of difficult-to-machine materials such as engineering ceramics and high-strength metals, reducing cutting forces, suppressing machining damage, and improving machining quality. Currently, ultrasonic vibration machining technology is widely used in the automotive, 3C (computer, communication, and consumer electronics) and aerospace manufacturing industries.

[0003] However, in actual processing, different processing conditions have different requirements for the amplitude and vibration mode. Usually, the amplitude can be changed by adjusting the output power of the ultrasonic generator, but traditional ultrasonic vibration tool holders only have a single vibration mode. If the vibration mode needs to be changed, a corresponding type of ultrasonic vibration tool holder device must be replaced, which is costly.

[0004] Therefore, there is an urgent need for an ultrasonic vibration tool holder device with variable vibration modes and a grooving method to solve the problem of inconvenient vibration mode changes. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an ultrasonic vibration tool holder device with variable vibration modes and a grooving method, thereby solving the problem of inconvenient vibration mode changes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A variable vibration mode ultrasonic vibrating tool holder device, characterized in that it includes an ultrasonic vibrating tool holder, an ultrasonic power transmission primary-side device, and an ultrasonic generator. The ultrasonic vibrating tool holder includes a mode converter, an ultrasonic transducer, and an ultrasonic tool holder housing. The lower end of the mode converter is used to mount the tool, and the upper end of the mode converter is detachably connected to the lower end of the ultrasonic transducer. The upper end of the ultrasonic transducer is fixedly installed inside the ultrasonic tool holder housing. A secondary magnetic core structure electrically connected to the ultrasonic transducer is provided on the side of the ultrasonic tool holder housing. The ultrasonic tool holder housing located above the secondary magnetic core structure is used to connect to the machine tool spindle. The upper end of the ultrasonic power transmission primary-side device is sleeved and installed on the outside of the machine tool spindle. The lower end of the ultrasonic power transmission primary-side device is located above the secondary magnetic core structure, and a parallel primary magnetic core structure is provided corresponding to the secondary magnetic core structure. The primary magnetic core structure is electrically connected to the ultrasonic generator through a power transmission line.

[0007] To optimize the above technical solution, the specific measures also include: Furthermore, the bottom of the mode converter has an axially upward mounting hole, and the top of the mode converter has a narrow-end upward-facing mating frustum. The top of the mating frustum has an axially downward-facing threaded hole that extends to the mounting hole. The bottom of the ultrasonic transducer has a concave mating groove corresponding to the mating frustum. The mating groove allows the mating frustum to be inserted. The mating groove has an axially upward-facing threaded hole. The mounting hole allows a screw to be inserted and threadedly connected to the threaded holes of the mode converter and the ultrasonic transducer.

[0008] Furthermore, the bottom of the mounting hole in the modal converter is set as a wide opening with an increased inner diameter, which allows for the insertion of cutting tools. The outer wall of the modal converter located at the wide opening is provided with external threads, which allow for the installation of cutting tools by spring collets and nuts.

[0009] Furthermore, the outer side of the mode converter has an arc-shaped surface that tapers from top to bottom.

[0010] Furthermore, the ultrasonic transducer includes an amplitude transformer, a rear cover plate, several piezoelectric ceramic plates, and several electrode plates. The lower end of the amplitude transformer is used to connect to a mode converter, and a stud is provided at the center of the upper end of the amplitude transformer. The piezoelectric ceramic plates and electrode plates are sequentially and spaced on the stud. The rear cover plate is used to be threadedly connected to the stud and to press the piezoelectric ceramic plates and electrode plates tightly. The upper side of the amplitude transformer is used to connect to the lower end of the ultrasonic scalpel handle housing. The rear cover plate, piezoelectric ceramic plates, and electrode plates are disposed inside the ultrasonic scalpel handle housing. The electrode plates are electrically connected to the secondary magnetic core structure through wires.

[0011] Furthermore, the ultrasonic scalpel holder housing includes a scalpel holder housing and a clamping head. The lower end of the scalpel holder housing has an installation cavity into which the upper end of the ultrasonic transducer can extend. The upper outer ring of the scalpel holder housing has the secondary magnetic core structure. The upper end of the scalpel holder housing is connected to a clamping head that can be used for clamping and connecting to a machine tool spindle.

[0012] Furthermore, the secondary magnetic core structure includes a first coil, a secondary magnetic core, an aluminum ring, and a first epoxy resin layer. An aluminum ring is fitted around the side of the ultrasonic scalpel handle housing. The secondary magnetic core is installed inside the aluminum ring. The secondary magnetic core has an annular groove. The first coil is embedded in the annular groove of the secondary magnetic core. The first epoxy resin layer is used to encapsulate the first coil in the annular groove. The two terminals of the first coil extend into the interior of the ultrasonic scalpel handle housing and are connected to the ultrasonic transducer.

[0013] Furthermore, the ultrasonic power transmission primary device includes a spindle collar, two side plates, and a base plate. The spindle collar is sleeved and installed on the outside of the machine tool spindle. Two vertically arranged side plates are symmetrically connected to the sides of the spindle collar. The lower ends of the two side plates are connected to a base plate. A primary magnetic core structure is embedded in the base plate. An aviation wiring socket is installed on the side of each side plate. The wiring terminal of the primary magnetic core structure is connected to the wiring terminal of the aviation wiring socket. The aviation wiring socket is used to connect the ultrasonic generator through the power transmission line.

[0014] Furthermore, the primary magnetic core structure includes a primary magnetic core, a second coil, and a second epoxy resin layer. A ring of primary magnetic core is embedded in the base plate. A ring groove is provided on the primary magnetic core. A ring of second coil is embedded inside the ring groove of the primary magnetic core and encapsulated by the second epoxy resin layer. The two terminals of the second coil are connected to the two terminals of the aviation wiring socket.

[0015] Furthermore, a grooving method for a skewed slot in a mode converter is characterized by comprising the following steps: Establish a chute structure model, with point O as the initial point of the chute, point O' as the end point of the chute, the vertical length of the chute being l, the width being b, the depth being h, the angle being α, and the number being g. Let the initial longitudinal wave displacement y(t) at point O at time t be:

[0016] Where A is the amplitude; f is the resonant frequency; The vibration distribution at point O is the skew groove solid m. e (t) and the non-sloping section m e1 (t) is then represented as:

[0017] In the formula, L is the vertical length of the mode converter, and r is the radius of the mode converter; The difference in vibration displacement between the two at point O' is:

[0018] The phase difference between the two is:

[0019] In the formula, E is the elastic modulus of the material, and ρ is the density; Combining the vibrations in the two directions at point O' into a longitudinal vibration along the y-direction and a torsional vibration along the x-direction, the formula for the combination in the x and y directions is:

[0020]

[0021] In the formula: Let , , Combining the above equations, we can obtain the equation of the ellipse:

[0022] The equation for the longitudinal / torsional amplitude ratio is: ; Based on the longitudinal / torsional amplitude ratio equation, pre-input the longitudinal / torsional amplitude ratio. The values ​​of any five of the following parameters are used to determine the vertical length l, width b, depth h, angle α, and quantity g of the inclined groove, in order to obtain the remaining parameter that meets the expectations, and then the inclined groove is cut based on the result.

[0023] The beneficial effects of this invention are: This invention enables convenient switching of the vibration mode of an ultrasonic vibrating tool holder by using a mode transducer that is detachably connected to the ultrasonic transducer. Furthermore, when wear occurs on the spring collet mating surface, the accuracy of the ultrasonic vibrating tool holder can be restored by replacing the mode transducer, effectively reducing operating costs. This invention has a simple structure, is easy to install, and exhibits stable performance, making it promising for broad applications.

[0024] According to the processing requirements or the longitudinal / torsional amplitude ratio requirements, the present invention can manufacture modal transducers with different inclined groove structures as needed and replace them to obtain a matching vibration mode. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an ultrasonic vibration knife holder device with variable vibration modes proposed in this invention; Figure 2 This is a schematic diagram of the ultrasonic vibration knife holder of the variable vibration mode ultrasonic vibration knife holder device proposed in this invention; Figure 3 This is a schematic diagram of the ultrasonic transducer of an ultrasonic vibration tool holder device with variable vibration modes proposed in this invention; Figure 4 This is a schematic diagram of the ultrasonic knife handle housing of an ultrasonic vibration knife handle device with variable vibration modes proposed in this invention; Figure 5 This is a schematic diagram of the ultrasonic power transmission primary device of an ultrasonic vibration tool holder with variable vibration modes proposed in this invention. Figure 6 This is a schematic diagram of the mode converter of an ultrasonic vibration tool holder device with variable vibration modes proposed in this invention; Figure 7 This is another schematic diagram of the mode converter of the ultrasonic vibration tool holder device with variable vibration modes proposed in this invention; Figure 8 This is a schematic diagram of the inclined groove structure model of the grooving method proposed in this invention; Figure 9 This is a schematic diagram of the inclined groove cross-section of a grooving method proposed in this invention; Figure 10 This is a vibration diagram of a grooving method proposed in this invention.

[0026] Reference numerals: 1. Ultrasonic vibrating tool holder; 2. Ultrasonic transducer; 3. Mode converter; 4. Spring collet; 5. Screw; 6. Tool; 7. Nut; 8. Ultrasonic tool holder housing; 9. Ultrasonic power transmission primary device; 10. Ultrasonic generator; 11. Machine tool spindle; 12. Side fastening screw; 13. Power transmission line; 201. Rear cover plate; 202. Piezoelectric ceramic plate; 203. Electrode plate; 204. Wire; 205. Amplitude transformer; 801. First coil; 802. Secondary magnetic core; 803. Aluminum ring; 804. First epoxy resin layer; 805. Tool holder housing; 901. Aviation wiring socket; 902. Spindle collar; 903. Side plate; 904. Base plate. Detailed Implementation

[0027] The invention will now be described in further detail with reference to the accompanying drawings.

[0028] As attached Figure 1 As shown in the figure, an ultrasonic vibrating knife handle device with variable vibration modes according to an embodiment of the present invention includes an ultrasonic vibrating knife handle 1, an ultrasonic power transmission primary device 9, and an ultrasonic generator 10. The ultrasonic vibrating knife handle 1 includes a mode converter 3, an ultrasonic transducer 2, and an ultrasonic knife handle housing 8. The lower end of the mode converter 3 is used to install a knife 6, and the upper end of the mode converter 3 is detachably connected to the lower end of the ultrasonic transducer 2. The upper end of the ultrasonic transducer 2 is fixedly installed inside the ultrasonic knife handle housing 8, and a ring is provided on the side of the ultrasonic knife handle housing 8. The ultrasonic transducer 2 is electrically connected to the secondary magnetic core structure. The ultrasonic shank housing 8 located above the secondary magnetic core structure is used to connect with the machine tool spindle 11. The upper end of the ultrasonic power transmission primary device 9 is sleeved and installed on the outside of the machine tool spindle 11. The lower end of the ultrasonic power transmission primary device 9 is located above the secondary magnetic core structure. A parallel primary magnetic core structure is provided corresponding to the secondary magnetic core structure. The primary magnetic core structure is electrically connected to the ultrasonic generator 10 through the power transmission line 13. The ultrasonic generator 10 is used to transmit high-frequency power.

[0029] In the above scheme, the mode converter 3 has a cylindrical structure, which can be easily disassembled and replaced as needed. During use, if attached... Figure 6 and attached Figure 7As shown, the mode converter 3 can be selected as a longitudinal vibration mode converter without sloping slots in the circumferential direction, or a longitudinal-torsional composite mode converter with sloping slots in the circumferential direction, as needed. The vibration mode can be changed through the sloping slots. A certain number of sloping slots can be set in the circumferential direction of the mode converter 3 according to the vibration mode requirements. Therefore, by replacing the mode converter 3 with different sloping slot structures, a matching vibration mode can be easily obtained. Specifically, for example, according to the vibration requirements of the longitudinal-torsional ratio, the sloping slot length on the mode converter 3 can be set to 3mm-13mm, the slot width to 0.8mm-2mm, the slot depth to 1.5mm-3mm, the number to 4-8, and the angle to 15 degrees-75 degrees. The longitudinal-torsional ratio calculated through simulation is 0.16-0.46. The operating resonant frequency can be 16kHz-30kHz.

[0030] As attached Figure 2 As shown, in a specific embodiment based on the above, the modal transducer 3 has an axially upward mounting hole at its bottom, and a narrow-end upward-facing mating frustum at its top. The conical surface of the mating frustum is 1:10. A threaded hole extending through the mounting hole is axially downward-facing at the top of the mating frustum. The ultrasonic transducer 2 has a concave mating groove at its bottom corresponding to the mating frustum. The mating groove allows the mating frustum to be inserted. A threaded hole is axially upward-facing in the mating groove. The mounting hole allows a screw 5 to be inserted, and the screw 5 is threaded into the threaded holes of the modal transducer 3 and the ultrasonic transducer 2. Thus, the mounting hole and threaded hole facilitate the assembly and disassembly of the modal transducer 3 and the ultrasonic transducer 2, and the mating frustum and mating groove facilitate installation positioning.

[0031] In a further specific embodiment based on the above, the bottom of the mounting hole in the modal converter 3 is designed as a wide opening with an increased inner diameter, allowing the tool 6 to be inserted. The outer wall of the modal converter 3 at the wide opening has external threads, which allow the spring collet 4 and the nut 7 to mount the tool 6. Specifically, the tool 6 is placed in the center hole of the spring collet 4 and mounted at the wide opening at the front end of the modal converter 3, and is fixed and locked by the nut 7.

[0032] In a further specific embodiment based on the above, the outer side of the mode converter 3 is an arc-shaped surface that tapers from top to bottom. In this solution, the arc-shaped surface on the outer side of the mode converter 3 can be provided with a circumferential groove structure.

[0033] As attached Figure 3As shown, in another specific embodiment based on the above, the ultrasonic transducer 2 includes an amplitude transformer 205, a rear cover plate 201, several piezoelectric ceramic plates 202, and several electrode plates 203. The lower end of the amplitude transformer 205 is used to connect to the mode converter 3. A stud is provided at the center of the upper end of the amplitude transformer 205. The piezoelectric ceramic plates 202 and electrode plates 203 are sequentially and spaced on the stud. The rear cover plate 201 is used to connect with the stud threadedly and to press the piezoelectric ceramic plates 202 and electrode plates 203. The upper side of the amplitude transformer 205 is used to connect to the lower end of the ultrasonic scalpel handle housing 8. The rear cover plate 201, piezoelectric ceramic plates 202, and electrode plates 203 are disposed inside the ultrasonic scalpel handle housing 8. The electrode plates 203 are electrically connected to the secondary magnetic core structure through wires 204.

[0034] Specifically, in this scheme, the piezoelectric ceramic sheet 202 can be of model PZT-8, with dimensions of Ф50×Ф20×6, and the quantity of piezoelectric ceramic sheets 202 is 4. In the scheme combining the above-mentioned mode converter 3 structure, the aforementioned docking groove is formed on the amplitude transformer 205.

[0035] As attached Figure 4 As shown, in another specific embodiment based on the above, the ultrasonic scalpel handle housing 8 includes a scalpel handle housing 805 and a clamping head. The lower end of the scalpel handle housing 805 is provided with a mounting cavity into which the upper end of the ultrasonic transducer 2 can extend. The upper outer ring of the scalpel handle housing 805 is provided with a secondary magnetic core structure. The upper end of the scalpel handle housing 805 is connected to a clamping head that can be clamped and connected to the machine tool spindle 11.

[0036] In this solution, the ultrasonic stalk housing 8 is installed at the front end of the machine tool spindle 11 through a clamping head that cooperates with the machine tool spindle 11. The machine tool spindle 11 has a structure that can be clamped and connected with the clamping head. This structure is existing technology and is a common structure of the machine tool spindle 11. It does not involve any improvement and will not be described in detail.

[0037] In the scheme combining the above-described ultrasonic transducer 2 structure, a flange can be provided on the upper side of the amplitude transformer 205 of the ultrasonic transducer 2 for connection with the end of the mounting cavity of the tool holder housing 805. During installation, the flange of the ultrasonic transducer 2 and the hole at the front end of the tool holder housing 805 need to be interference-fitted with an interference amount of 0.02mm-0.05mm to ensure that the two will not loosen during the welding process. After assembly, the ultrasonic transducer 2 and the tool holder housing 805 can be connected by laser welding with a laser welding power of 800W, a welding speed of 400mm / min, and a welding depth of 3mm.

[0038] In another specific embodiment based on the above, the secondary magnetic core structure includes a first coil 801, a secondary magnetic core 802, an aluminum ring 803, and a first epoxy resin layer 804. An aluminum ring 803 is sleeved on the side of the ultrasonic scalpel handle housing 8. The secondary magnetic core 802 is installed inside the aluminum ring 803. The secondary magnetic core 802 has an annular groove. The first coil 801 is embedded in the annular groove of the secondary magnetic core 802. The first epoxy resin layer 804 is used to encapsulate the first coil 801 in the annular groove. The two terminals of the first coil 801 extend into the interior of the ultrasonic scalpel handle housing 8 and are connected to the ultrasonic transducer 2.

[0039] In this design, the aluminum ring 803 can be fitted onto the tool holder housing 805 and secured with quick-drying adhesive.

[0040] In the embodiment combining the above-described ultrasonic transducer 2 structure, the two terminals of the first coil 801 extend into the interior of the ultrasonic scalpel handle housing 8 and are connected to the electrode plate 203. In the embodiment combining the above-described ultrasonic scalpel handle housing 8 structure, the two terminals of the first coil 801 pass through the opening in the handle housing 805 into the mounting cavity.

[0041] As attached Figure 5 As shown, in another specific embodiment based on the above, the ultrasonic power transmission primary device 9 includes a spindle collar 902, two side plates 903, and a base plate 904. The spindle collar 902 is sleeved and installed on the outside of the machine tool spindle 11. Two vertically arranged side plates 903 are symmetrically connected to the side of the spindle collar 902. The lower ends of the two side plates 903 are connected to a base plate 904. A primary magnetic core structure is embedded in the base plate 904. An aviation wiring socket 901 is installed on the side of any side plate 903. The wiring end of the primary magnetic core structure is connected to the wire end of the aviation wiring socket 901. The aviation wiring socket 901 is used to connect to the ultrasonic generator 10 through the power transmission line 13.

[0042] In this design, the spindle collar 902 and the two side plates 903 are fixed together with screws. Similarly, the side plates 903 and the base plate 904 are locked together with screws. The spindle collar 902 is fixed to the outer side of the machine tool spindle 11 with side-locking screws 12. One end of the power transmission line 13 is connected to the aviation connector 901, and the other end is connected to the power output interface of the ultrasonic generator 10. During use, the gap between the secondary and primary magnetic core structures can be controlled by adjusting the height of the ultrasonic power transmission device 9 on the machine tool spindle 11, ensuring the gap is between 0.1mm and 1mm.

[0043] In a further specific embodiment based on the above, the primary magnetic core structure includes a primary magnetic core, a second coil, and a second epoxy resin layer. A ring of primary magnetic core is embedded in the base plate 904. The primary magnetic core has an annular groove. A ring of second coil is embedded inside the annular groove of the primary magnetic core and encapsulated by the second epoxy resin layer. The two terminals of the second coil are connected to the two terminals of the aviation wiring socket 901.

[0044] A method for slotting a skewed groove in a mode converter includes the following steps: As attached Figure 8 As shown, a sloping groove structure model is established. Point O is the initial point of the sloping groove, and point O' is the end point of the sloping groove. The vertical length of the sloping groove is l, the width is b, the depth is h, the angle is α, and the number is g. According to the ultrasonic vibration mode conversion theory, when the vibration is transmitted to point O, due to the effect of the sloping groove, the vibration direction changes from the initial longitudinal vibration to the vibration along the solid between the two sloping grooves. In the solid section without the chute, the longitudinal vibration direction is the same as the initial direction. Let the initial longitudinal wave vibration displacement y(t) at point O at time t be:

[0045] Where A is the amplitude; f is the resonant frequency; As attached Figure 9 As shown in the diagram, the above analysis indicates that the vibration at point O is divided into two parts. Since vibration is a manifestation of energy transfer, its magnitude is mainly related to the cross-sectional area of ​​the transmission medium. Therefore, the vibration distribution at point O is as follows: [The text abruptly ends here, so the translation stops as well.] e (t) and the non-sloping section m e1 (t) is then represented as:

[0046] In the formula, L is the vertical length of mode converter 3, and r is the radius of mode converter 3; Compared to the section without the skew groove, the longitudinal vibration is transmitted over a longer length within the skew groove structure than the section without the skew groove. Therefore, the difference in vibration displacement at point O' is:

[0047] The phase difference is not only related to the structural dimensions of the inclined groove, but also to the elastic modulus E, density ρ, and resonant frequency f of the material. Therefore, the phase difference between the two is:

[0048] In the formula, E is the elastic modulus of the material, and ρ is the density; As attached Figure 10As shown, the vibrations at point O' in two directions are synthesized into longitudinal vibration along the y-direction and torsional vibration along the x-direction. However, in the actual vibration process, the amplitude transformer 205 of the ultrasonic transducer vibrates in the same phase in the longitudinal vibration of the same cross section. Therefore, when synthesizing the amplitudes, the amplitudes in the two directions are made to have the same phase when synthesized in the y-direction. Then the synthesis formula for the x and y directions is:

[0049]

[0050] In the formula: Let , , Under the action of the inclined groove structure, the initial longitudinal vibration can be transformed into a vibration with a long axis of 2Gy, a short axis of 2Gx, and a phase difference of . If θ undergoes elliptical vibration, then combining the above equations yields the equation of the ellipse:

[0051] The equation for the ratio of longitudinal to torsional amplitude, i.e., the equation for the ratio of torsional amplitude to longitudinal amplitude, is: ; Based on the longitudinal / torsional amplitude ratio equation, pre-input the longitudinal / torsional amplitude ratio. The values ​​of any five of the following parameters are obtained: vertical length l, width b, depth h, angle α, and quantity g of the inclined groove. The remaining parameter is then used to obtain the value that meets the expectations. Based on the result, the inclined groove is slotted. After obtaining the mode converter 3 that can meet the required vibration mode, it can be replaced accordingly.

[0052] Specifically, the remaining value obtained can be rounded to the nearest whole number according to a preset error range to determine the expected value.

[0053] This invention enables convenient switching of the vibration mode of the ultrasonic vibrating tool holder by using a mode converter 3 that is detachably connected to the ultrasonic transducer 2. Simultaneously, when wear occurs on the mating surface of the spring collet 4, the accuracy of the ultrasonic vibrating tool holder can be restored by replacing the mode converter 3, effectively reducing operating costs. This invention has a simple structure, is easy to install, and exhibits stable performance, possessing broad application prospects.

[0054] According to the processing requirements or the longitudinal / torsional amplitude ratio requirements, the present invention can manufacture different inclined groove structures of mode converter 3 as needed for replacement to obtain a matching vibration mode.

[0055] It should be noted that the terms such as "upper", "lower", "left", "right", "front", and "back" used in the invention are only for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0056] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that those skilled in the art will understand that various changes, modifications, substitutions, refinements, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations should be considered within the scope of protection of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable vibration mode ultrasonic vibration knife holder device, characterized in that: The device includes an ultrasonic vibrating knife handle (1), an ultrasonic power transmission primary device (9), and an ultrasonic generator (10). The ultrasonic vibrating knife handle (1) includes a mode converter (3), an ultrasonic transducer (2), and an ultrasonic knife handle housing (8). The lower end of the mode converter (3) is used to install the knife (6), and the upper end of the mode converter (3) is detachably connected to the lower end of the ultrasonic transducer (2). The upper end of the ultrasonic transducer (2) is fixedly installed inside the ultrasonic knife handle housing (8). The side of the ultrasonic knife handle housing (8) is provided with a... The secondary magnetic core structure is electrically connected to the ultrasonic transducer (2). The ultrasonic shank shell (8) located above the secondary magnetic core structure is used to connect to the machine tool spindle (11). The upper end of the ultrasonic power transmission primary device (9) is sleeved and installed on the outside of the machine tool spindle (11). The lower end of the ultrasonic power transmission primary device (9) is set above the secondary magnetic core structure. The secondary magnetic core structure is provided with parallel and opposite primary magnetic core structures. The primary magnetic core structure is electrically connected to the ultrasonic generator (10) through the power transmission line (13).

2. The ultrasonic vibration knife holder device with variable vibration modes according to claim 1, characterized in that: The modal converter (3) has an axially upward mounting hole at its bottom and a narrow-end upward-facing docking frustum at its top. The top of the docking frustum has an axially downward-facing threaded hole that extends to the mounting hole. The bottom of the ultrasonic transducer (2) has an upward-facing docking groove corresponding to the docking frustum. The docking groove allows the docking frustum to be inserted. The docking groove has an axially upward-facing threaded hole. The mounting hole allows a screw (5) to be inserted and threadedly connected to the threaded holes of the modal converter (3) and the ultrasonic transducer (2).

3. The ultrasonic vibration knife holder device with variable vibration modes according to claim 2, characterized in that: The bottom of the mounting hole in the modal converter (3) is set as a wide opening with an increased inner diameter. The wide opening allows the tool (6) to be inserted. The outer wall of the modal converter (3) located at the wide opening is provided with an external thread. The external thread allows the spring collet (4) and nut (7) to install the tool (6).

4. The ultrasonic vibration knife holder device with variable vibration modes according to claim 2, characterized in that: The outer side of the mode converter (3) is an arc-shaped surface that contracts from top to bottom.

5. The ultrasonic vibration knife holder device with variable vibration modes according to claim 1, characterized in that: The ultrasonic transducer (2) includes an amplitude transformer (205), a rear cover plate (201), several piezoelectric ceramic plates (202) and several electrode plates (203). The lower end of the amplitude transformer (205) is used to connect to the mode converter (3). A stud is provided at the center of the upper end of the amplitude transformer (205). The piezoelectric ceramic plates (202) and electrode plates (203) are sequentially and spaced on the stud. The rear cover plate (201) is used to connect with the stud and press the piezoelectric ceramic plates (202) and electrode plates (203) tightly. The upper side of the amplitude transformer (205) is used to connect to the lower end of the ultrasonic scalpel handle housing (8). The rear cover plate (201), piezoelectric ceramic plates (202) and electrode plates (203) are disposed inside the ultrasonic scalpel handle housing (8). The electrode plates (203) are electrically connected to the secondary magnetic core structure through wires (204).

6. The ultrasonic vibration knife holder device with variable vibration modes according to claim 1, characterized in that: The ultrasonic scalpel handle housing (8) includes a scalpel handle housing (805) and a clamping head. The lower end of the scalpel handle housing (805) is provided with an installation cavity into which the upper end of the ultrasonic transducer (2) can extend. The upper outer ring of the scalpel handle housing (805) is provided with the secondary magnetic core structure. The upper end of the scalpel handle housing (805) is connected to a clamping head that can be clamped and connected to the machine tool spindle (11).

7. The ultrasonic vibration knife holder device with variable vibration modes according to claim 1, characterized in that: The secondary magnetic core structure includes a first coil (801), a secondary magnetic core (802), an aluminum ring (803), and a first epoxy resin layer (804). An aluminum ring (803) is fitted around the side of the ultrasonic scalpel handle housing (8). The secondary magnetic core (802) is installed inside the aluminum ring (803). The secondary magnetic core (802) has an annular groove. The first coil (801) is embedded in the annular groove of the secondary magnetic core (802). The first epoxy resin layer (804) is used to encapsulate the first coil (801) in the annular groove. The two terminals of the first coil (801) penetrate into the interior of the ultrasonic scalpel handle housing (8) and are connected to the ultrasonic transducer (2).

8. The ultrasonic vibration knife holder device with variable vibration modes according to claim 1, characterized in that: The ultrasonic power transmission primary device (9) includes a spindle collar (902), two side plates (903) and a base plate (904). The spindle collar (902) is sleeved and installed on the outside of the machine tool spindle (11). Two vertically arranged side plates (903) are symmetrically connected to the side of the spindle collar (902). The lower ends of the two side plates (903) are connected to a base plate (904). A primary magnetic core structure is embedded in the base plate (904). An aviation wiring socket (901) is installed on the side of any side plate (903). The wiring end of the primary magnetic core structure is connected to the wire end of the aviation wiring socket (901). The aviation wiring socket (901) is used to connect the ultrasonic generator (10) through the power transmission line (13).

9. The ultrasonic vibration knife holder device with variable vibration modes according to claim 8, characterized in that: The primary magnetic core structure includes a primary magnetic core, a second coil, and a second epoxy resin layer. A primary magnetic core is embedded in the base plate (904). The primary magnetic core has an annular groove. A second coil is embedded inside the annular groove of the primary magnetic core and encapsulated by the second epoxy resin layer. The two terminals of the second coil are connected to the two terminals of the aviation wiring socket (901).

10. A method for slotting a skewed groove in a mode converter, characterized in that, Includes the following steps: Establish a chute structure model, with point O as the initial point of the chute, point O' as the end point of the chute, the vertical length of the chute being l, the width being b, the depth being h, the angle being α, and the number being g. Let the initial longitudinal wave displacement y(t) at point O at time t be: Where A is the amplitude; f is the resonant frequency; The vibration distribution at point O is the skewed groove solid m. e (t) and the non-sloping section m e1 (t) is then represented as: In the formula, L is the vertical length of the mode converter (3), and r is the radius of the mode converter (3); The difference in vibration displacement between the two at point O' is: The phase difference between the two is: In the formula, E is the elastic modulus of the material, and ρ is the density; Combining the vibrations in the two directions at point O' into a longitudinal vibration along the y-direction and a torsional vibration along the x-direction, the formula for the combination in the x and y directions is: In the formula: Let , , Combining the above equations, we can obtain the equation of the ellipse: The equation for the longitudinal / torsional amplitude ratio is: ； Based on the longitudinal / torsional amplitude ratio equation, pre-input the longitudinal / torsional amplitude ratio. The values ​​of any five of the following parameters are used to determine the vertical length l, width b, depth h, angle α, and quantity g of the inclined groove, in order to obtain the remaining parameter that meets the expectations, and then the inclined groove is cut based on the result.

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