A tool holder for ultrasonic machining

Abstract

This invention discloses a tool holder for ultrasonic machining, applicable to the field of ultrasonic machining technology. The tool holder includes, from top to bottom, an ultrasonic transducer, an amplitude transformer, a detection unit, and a chuck. The ultrasonic transducer emits a predetermined ultrasonic signal. The amplitude transformer converts the ultrasonic signal emitted by the transducer into mechanical vibration and transmits it to the chuck through the detection unit. The detection unit includes a housing, a support frame, and sensors. The top of the housing is fixedly connected to the amplitude transformer, and the bottom of the housing is fixedly connected to the chuck. The support frame is located inside the housing, and multi-directional hinges are provided on each inner wall side of the support frame near the housing. These multi-directional hinges are connected to the sensors, and the support frame ensures that the sensors remain in contact with the inner walls of the housing at all times. The sensors detect cutting deformation of the housing in different dimensions. The chuck is used to mount the cutting tool. The support frame and multi-directional hinges ensure that multiple sensors remain in contact with the inner walls of the housing at all times, enabling the sensors to detect multi-dimensional deformation of the housing.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic machining technology, and more particularly to a tool holder for ultrasonic machining. Background Technology

[0002] With the development of technology, ultrasound is increasingly being used, especially in the field of difficult-to-machine materials, where it has solved many key process problems and achieved good results. Ultrasonic machining is a special processing method that uses ultrasonic energy to remove or deform materials. Its basic principle is to generate high-frequency vibrations through an ultrasonic generator, which are converted into mechanical vibrations by a transducer, thereby driving the tool or workpiece to vibrate at high frequency in a liquid medium, thus achieving the removal or deformation of materials.

[0003] For ultrasonic vibration-assisted machining technology, the quality of obtaining the cutting force parameters directly determines the accuracy of the entire ultrasonic vibration machining process. As an important research object, the cutting force parameters are also being measured in more diverse ways with the continuous development of technology. When the cutting force changes, it will affect the state of the tool and the machine tool spindle, and the current of the machine tool DC motor will also change.

[0004] In existing technologies, some attempts are made to monitor cutting force by recording the electrical signals of DC motors in CNC machine tools. The main principle is to derive the relationship between the change in DC motor current and the cutting force to calculate the cutting force. This method can obtain a rough value of the cutting force, but the relationship model between the cutting force and the DC motor electrical signal is very complex, and there are many influencing factors that cannot be eliminated, resulting in a very low signal-to-noise ratio. Other researchers have tried to use Hall sensors, controlled by a microcontroller, to collect and analyze the offset of the motor current as the cutting force changes, and then analyze the cutting force state. Some existing technologies have also attempted to introduce a three-component accelerometer into the measurement of cutting force. By considering the flexible modal vibration and the inertial and viscous forces of rigid body motion, a self-calibrating filter is designed, which attenuates the error to a certain extent. However, it cannot measure low-frequency cutting forces, and the structure is also relatively complex. Summary of the Invention

[0005] This invention provides a tool holder for ultrasonic machining, aiming to solve the technical problem of low accuracy in obtaining cutting force parameters in the prior art.

[0006] To address the aforementioned problems, the present invention provides a tool holder for ultrasonic machining, comprising, from top to bottom, an ultrasonic transducer, an amplitude transformer, a detection unit, and a chuck connected in sequence.

[0007] The ultrasonic transducer is used to emit a set ultrasonic signal;

[0008] The amplitude transformer is used to convert the ultrasonic signal emitted by the ultrasonic transducer into mechanical vibration and transmit it to the clamp through the detection unit.

[0009] The detection unit includes a housing, a support frame, and a sensor; the top of the housing is fixedly connected to the amplitude transformer, and the bottom of the housing is fixedly connected to the clamp; the support frame is disposed inside the housing, and the support frame is provided with multi-directional hinges on each inner wall side near the housing, the multi-directional hinges being connected to the sensor; the support frame is used to ensure that the sensor always remains in contact with the inner wall of the housing, and the sensor is used to detect the cutting deformation of the housing in different dimensions;

[0010] The chuck is used to mount the cutting tool.

[0011] In one embodiment, the support frame includes a plurality of connection points, which are respectively arranged adjacent to the inner walls of the housing;

[0012] The multi-directional hinge is connected to the connection point.

[0013] In one embodiment, the support frame includes a plurality of support rods, which are connected to each other to form a polygonal structure, and the connection points are the points where the sides of the polygonal structure are connected.

[0014] In one embodiment, the support rod is made of an elastic material so that the support frame elastically abuts the sensor against the inner wall of the housing.

[0015] In one embodiment, the multi-directional hinge is a ball joint.

[0016] In one embodiment, the sensor is a piezoelectric thin-film smart sensor.

[0017] In one embodiment, a controller is further included, which is signal-connected to the sensor of the detection unit and the ultrasonic transducer, and the controller is used to adjust the ultrasonic signal output by the ultrasonic transducer according to the signal detected by the sensor.

[0018] In one embodiment, the ultrasonic transducer includes a first matching block, a second matching block, and an ultrasonic transducer;

[0019] The first matching block is located on the side of the ultrasonic transducer near the amplitude transformer, and the first matching block is connected to the ultrasonic transducer;

[0020] The second matching block is located on the side of the ultrasonic transducer away from the amplitude transformer, and the second matching block is connected to the ultrasonic transducer;

[0021] The first matching block and the second matching block are used to ensure the stability of the ultrasonic transducer when it undergoes ultrasonic vibration.

[0022] In one embodiment, the outer diameter of the amplitude transformer gradually decreases from the end near the ultrasonic transducer to the end near the detection unit.

[0023] In one embodiment, the axial dimension of the amplitude transformer is an integer multiple of the wavelength of the ultrasonic signal.

[0024] As can be seen from the above technical solutions, the present invention has at least the following advantages:

[0025] This embodiment provides a tool holder for ultrasonic machining. A detection unit for detecting the cutting state is connected between the chuck and the ultrasonic transducer. The detection unit includes a housing, a support frame, and sensors. Multi-directional hinges are connected to each inner wall of the housing via the support frame, and these hinges are in turn connected to the sensors. The support frame and the multi-directional hinges ensure that multiple sensors remain in contact with each inner wall of the housing at all times. The sensors can detect multi-dimensional deformation of the housing, thereby detecting the cutting force parameters of the chuck and achieving accurate acquisition of these parameters. This effectively solves the technical problem of low accuracy in acquiring cutting force parameters in existing technologies. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of a tool holder for ultrasonic machining provided in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the detection unit provided in an embodiment of the present invention.

[0029] Figure label:

[0030] 100. Control unit; 210. Ultrasonic transducer; 220. First matching block; 230. Second matching block; 240. Connecting flange; 250. Ultrasonic transducer; 300. Amplitude bar; 400. Detection unit; 410. Housing; 420. Support frame; 421. Support rod; 430. Multi-directional hinge; 440. Sensor; 500. Chuck; 600. Cutting tool. Detailed Implementation

[0031] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0032] Ultrasonic machining has many superior characteristics, such as high machining accuracy: due to the concentrated force of ultrasonic waves, it can achieve machining accuracy at the micron or even nanometer level. Wide machining range: ultrasonic machining is suitable for various hard and brittle materials, such as ceramics, glass, and quartz, and can also be used for machining metal materials. Low machining force: during ultrasonic machining, the contact force between the tool and the workpiece is small, reducing cutting forces and heat-affected zones during the machining process. Simple equipment structure: ultrasonic machining equipment is relatively simple and easy to maintain and operate.

[0033] Because of the high-frequency vibrations involved in ultrasonic processing, even the hardest products can be machined with relatively low force and high feed power. This is particularly advantageous for products that are difficult to machine or require high-quality surface treatment. There are many types of ultrasonic machining, such as ultrasonic welding, drilling, grinding and polishing, and cutting. If categorized by process properties, they include ultrasonic composite machining and micro-ultrasonic machining.

[0034] The equipment used in ultrasonic processing is crucial, as it determines the stability and adaptability of ultrasonic energy. It typically includes specialized components such as ultrasonic spindles, ultrasonic transducers, and ultrasonic tool holders. Currently, the technological differences in ultrasonic processing largely lie in the equipment, with advanced equipment manufacturers mainly located in Germany and the United States.

[0035] For ultrasonic vibration-assisted machining technology, the quality of obtaining the cutting force parameters directly determines the overall accuracy of the ultrasonic vibration machining process. When selecting an appropriate detection method, the characteristics of the sample, the required detection sensitivity and accuracy, and the ease of operation must be considered. Each method has its limitations, so in practical applications, it may be necessary to combine multiple techniques to obtain more comprehensive analytical results. For example, strain gauge force meters have a large overall size, high natural frequency, and low detection accuracy, making it difficult to detect the machining forces in some micro-ultrasonic machining processes. Piezoelectric force meters have excellent overall performance, but their manufacturing process is extremely precise and their cost is extremely high, therefore they are not widely used. Grating fiber optic force meters have low Z-axis sensitivity and low natural frequencies in all three axes.

[0036] The cutting force measurement method in principle assumes that the workpiece being machined is a rigid body and measures the cutting force acting on it, ignoring the loss during force transmission. However, in actual machining, the rigidity of the workpiece is not infinite, and the force will attenuate to some extent after being transmitted to the force measuring instrument, resulting in a certain discrepancy between the measurement result and the actual force on the tool. With the continuous development of intelligent manufacturing technology, measuring cutting force through intelligent tools has become a new trend.

[0037] Therefore, the present invention provides a tool holder for ultrasonic machining. By connecting a detection unit for detecting the cutting state between the chuck and the ultrasonic transducer, and utilizing multiple sensors in the detection unit to always keep in contact with the inner walls of the housing, multi-dimensional deformation of the housing can be detected, thereby enabling multi-dimensional deformation detection of the chuck. This completely solves the technical problem of low accuracy in obtaining cutting force parameters in the prior art.

[0038] Please see Figure 1 and Figure 2 This embodiment provides a tool holder for ultrasonic machining, including an ultrasonic transducer 210, an amplitude transformer 300, a detection unit 400 and a chuck 500 connected in sequence from top to bottom;

[0039] The ultrasonic transducer 210 is used to emit a set ultrasonic signal;

[0040] The amplitude transformer 300 is used to convert the ultrasonic signal emitted by the ultrasonic transducer 210 into mechanical vibration and transmit it to the chuck 500 through the detection unit 400.

[0041] The detection unit 400 includes a housing 410, a support frame 420, and a sensor 440. The top of the housing 410 is fixedly connected to the amplitude transformer 300, and the bottom of the housing 410 is fixedly connected to the chuck 500. The support frame 420 is located inside the housing 410. Each inner wall side of the support frame 420 near the housing 410 is provided with a multi-directional hinge 430. The multi-directional hinge 430 is connected to the sensor 440. The support frame 420 is used to keep the sensor 440 in contact with the inner wall of the housing 410 at all times. The sensor 440 is used to detect the cutting deformation of the housing 410 in different dimensions.

[0042] The chuck 500 is used for the detachable mounting of the tool 600.

[0043] Among them, the cutting deformation in different dimensions includes at least the vertical direction, the front-back direction, the left-right direction, and two diagonal directions.

[0044] During the ultrasonic machining process in this embodiment, the ultrasonic transducer 210 emits an ultrasonic signal, the amplitude transformer 300 receives the ultrasonic signal, converts the ultrasonic signal into mechanical vibration, and transmits it to the chuck 500 through the detection unit 400. When the chuck 500 is machining the workpiece, the detection unit 400 can obtain the force exerted by the tool 600 on the chuck 500 when machining the workpiece. Specifically, the force exerted by the tool 600 when machining the workpiece will cause the housing 410 to vibrate or deform in multiple dimensions. The sensor 440, which is always in contact with the inner walls of the housing 410, can detect the multi-dimensional vibration or deformation of the housing 410, thereby realizing the real-time and accurate acquisition of cutting force parameters.

[0045] The advantages of this embodiment are as follows: First, it has a simple structure and low data processing difficulty. Compared with the scheme that uses the electrical signal of the DC motor in the CNC machine tool to monitor, or uses Hall sensor 440 and single-chip microcomputer control to collect and analyze the offset of the motor current as the cutting force changes, this scheme only requires housing 410, support frame 420 and sensor 440 to realize the cutting deformation of tool 600 in different dimensions, and the data processing difficulty is low. Second, it has accurate detection. Compared with some schemes that simply fix sensor 440 horizontally to housing 410, when housing 410 deforms, it can intelligently detect the deformation in the horizontal cutting direction because it is simply attached to housing 410, which in turn leads to the intelligent detection of the machining parameter change signal in the horizontal cutting direction.

[0046] In one specific embodiment, such as Figure 1 and Figure 2 As shown, a feasible structure for the housing 410 in the detection unit 400 is further provided. The housing 410 has a hollow inner cavity that can accommodate the support frame 420, the multi-directional hinge 430, and the sensor 440.

[0047] In one specific embodiment, such as Figure 1 and Figure 2As shown, a feasible structure for the support frame 420 in the detection unit 400 is further provided. The support frame 420 includes multiple connection points, which are respectively arranged adjacent to the inner walls of the housing 410. That is, if the housing 410 is a cube, the support frame 420 includes at least six connection points, which are respectively arranged on the six surfaces of the housing 410: top, bottom, front, back, left, and right. Multi-directional hinges 430 are connected to the connection points. The multi-directional hinges 430 on each connection point can fix the support frame 420 and the sensor 440. The sensor 440 is in surface contact with the inner wall of the housing 410, while the sensor 440 is connected to the support frame 420 through the multi-directional hinges 430 to form a point structure connection. After the housing 410 vibrates or deforms, the sensor 440 can be adjusted around the connection points so that the sensor 440 fits as closely as possible to the inner wall of the housing 410, thereby accurately and comprehensively detecting the deformation of the housing 410.

[0048] In one embodiment, to improve the tightness of the fit between the sensor 440 and the inner wall of the housing 410, the support frame 420 includes multiple support rods 421. The multiple support rods 421 are interconnected to form a polygonal structure. The connection points of each side of the polygonal structure are connection points. The multiple support rods 421 can be fixed according to a preset structure to form the support frame 420. For example, when the housing 410 is a cube, the support frame 420 is a cube and each vertex of the cube is a connection point. The support frame 420 is arranged at an angle inside the housing 410. Compared with a single rod supporting a multi-directional hinge 430, the connection points are polygonal in shape with a polygonal structure. The support of the sensor 440 is more stable and will not cause the sensor 440 to detach from the inner wall of the housing 410 due to the deformation of a single rod.

[0049] Based on the above embodiments, in order to further improve the tightness of the fit between the sensor 440 and the inner wall of the housing 410, the support rod 421 is made of elastic material so that the support frame 420 elastically abuts the sensor 440 against the inner wall of the housing 410. The entire support frame 420 forms an elastic structure that can match the inner cavity of the housing 410. For example, the support frame can be made of flexible metal material. That is, considering that the housing 410 itself will deform during the processing of the tool 600, by setting the multi-directional hinge at the connection of multiple connecting rods and setting the connecting rods to be made of elastic material, the connecting rods can change accordingly when the housing 410 deforms, thereby causing the position of the connection of each connecting rod to change accordingly, thereby driving the sensor 440 to fit better against the inner wall of the housing.

[0050] In one specific embodiment, such as Figure 1 and Figure 2As shown, a feasible structure for the multi-directional hinge 430 in the detection unit 400 is further provided. The multi-directional hinge 430 is a ball joint, and multiple multi-directional hinges 430 are provided, each corresponding to one of the multiple sensors 440. The multi-directional hinges 430 are fixedly mounted on the support frame 420 and are universally connected to the sensors 440. The advantage of using a ball joint connection is that the structure of the ball joint itself provides multi-directional degrees of freedom of movement, allowing the sensors 440 to better adapt to shape changes and minor deformations inside the housing 410. This flexibility may help the sensors 440 maintain good contact with the inner wall of the housing 410 under different operating conditions.

[0051] In one embodiment, the ball joint mainly includes a ball and a shell. The ball is housed in the shell and can be omnidirectionally connected to the shell. The shell is fixedly connected to the support frame 420, and the ball is fixedly connected to the sensor 440.

[0052] In one specific embodiment, such as Figure 1 and Figure 2 As shown, a feasible structure for the sensor 440 in the detection unit 400 is further provided. The sensor 440 is a piezoelectric thin film smart sensor 440 or other flexible sensor 440. The flexible sensor 440 can detect multi-dimensional deformation of the housing 410.

[0053] It should be noted that in some alternative methods, the sensor 440 is bonded and fixed to the shell to detect the deformation of the shell 410. However, compared with the simple solution of attaching the sensor 440 to the shell 410, when the shell 410 deforms, it can only detect the deformation in the horizontal cutting direction because it is simply attached to the shell 410.

[0054] In one specific embodiment, such as Figure 1 and Figure 2 As shown, in order to improve the intelligent control of ultrasonic output, a controller is also included. The controller is signal-connected to the sensor 440 and the ultrasonic transducer 210 of the detection unit 400. The controller is used to adjust the ultrasonic signal output by the ultrasonic transducer 210 according to the signal detected by the sensor 440. In specific implementation, the detection unit 400 is communicatively connected to the control unit 100. The detection unit 400 obtains the force exerted by the tool 600 on the workpiece during processing and transmits the force exerted on the tool 600 during processing to the control unit 100, so that the control unit 100 can adjust the ultrasonic signal emitted by the ultrasonic transducer 210 based on the force, thereby realizing the dynamic adjustment of the cutting state of the tool holder of ultrasonic processing provided by the present invention relative to the tool 600.

[0055] In one specific embodiment, such as Figure 1 and Figure 2As shown, a feasible structure for the ultrasonic transducer 210 is further provided. The ultrasonic transducer 210 includes a first matching block 220, a second matching block 230, and an ultrasonic transducer 250. The first matching block 220 is located on the side of the ultrasonic transducer 250 near the amplitude transformer 300 and is connected to the ultrasonic transducer 250, that is, the first matching block 220 is located at the bottom of the ultrasonic transducer 250 (also referred to as the rear section of the ultrasonic transducer 250). The second matching block 230 is located on the side of the ultrasonic transducer 250 away from the amplitude transformer 300 and is connected to the ultrasonic transducer 250, that is, the second matching block 230 is located at the top of the ultrasonic transducer 250 (also referred to as the front section of the ultrasonic transducer 250). The first matching block 220 and the second matching block 230 are used to ensure the stability of the ultrasonic transducer 210 when it performs ultrasonic vibration.

[0056] The ultrasonic transducer 210 has at least the following advantages when it adopts this configuration: First, the first matching block 220 and the second matching block 230 can match the acoustic impedance of the ultrasonic transducer 210, thereby improving the energy transfer efficiency; second, the first matching block 220 and the second matching block 230 can ensure that the ultrasonic transducer 210 maintains a stable vibration state during operation; and third, the rigidity of the overall structure can suppress the generation of harmful vibrations and ensure the stability and consistency of ultrasonic vibration.

[0057] In one embodiment, the outer surfaces of the first matching block 220 and the second matching block 230 may be provided with cooling structures, such as heat sinks or cooling channels, to dissipate the heat generated by the ultrasonic transducer 210 during operation. This helps to maintain a stable operating temperature of the ultrasonic transducer 210.

[0058] In this embodiment, the first matching block 220 and the second matching block 230 can be made of metallic materials, such as aluminum or titanium. The size and shape of the first matching block 220 and the second matching block 230 can be optimized according to the parameters of the ultrasonic transducer 210. Preferably, the length of the first matching block 220 and / or the second matching block 230 is 1 / 4 or 3 / 4 of the ultrasonic wavelength emitted by the ultrasonic transducer 210, the first matching block 220 and / or the second matching block 230 has a conical structure, and the size of the side of the first matching block 220 and the second matching block 230 closer to the ultrasonic transducer 210 is larger than the size of the side farther away from the ultrasonic transducer 210.

[0059] In one embodiment, the tool holder for ultrasonic processing of this application further includes an ultrasonic power supply. The ultrasonic power supply is connected to the ultrasonic transducer 250 via a wire, and the output power emitted by the ultrasonic transducer 250 is adjusted by the change of current in the ultrasonic power supply, thereby realizing the adjustment of the ultrasonic signal emitted by the ultrasonic transducer 250. Preferably, a piezoelectric ceramic membrane is provided inside the ultrasonic transducer and is connected to the ultrasonic power supply via a wire. The ultrasonic power supply can change the output power of the piezoelectric ceramic membrane inside the ultrasonic transducer 250 according to the processing requirements.

[0060] In one specific embodiment, such as Figure 1 and Figure 2 As shown, a feasible structure for the amplitude transformer 300 is further provided. The outer diameter of the amplitude transformer 300 gradually decreases from the end near the ultrasonic transducer 210 to the end near the detection part 400. That is, from the top to the bottom of the amplitude transformer 300, the outer diameter of the amplitude transformer 300 gradually decreases to form a tapered structure with a large top and a small bottom. In specific implementation, the cross-sectional area structure of the tapered rod of the amplitude transformer 300 can concentrate the vibration energy at the end with a small cross-sectional area, thereby achieving the effect of amplitude amplification. Furthermore, during vibration, the shape of the tapered rod allows the stress to be distributed more evenly on the rod. Due to the gradual change in cross-sectional area, stress concentration is relatively less, reducing the risk of fatigue failure or damage to the rod due to excessive local stress.

[0061] In other words, the amplitude-amplifying boom, through geometric design (such as stepped or exponential shapes), concentrates and amplifies the energy of the transducer's output micro-amplitude (approximately a few micrometers), bringing it to the tens to hundreds of micrometers required for actual machining. For example, a stepped boom can achieve amplitude amplification of more than 20 times. Energy focusing, through changes in cross-sectional area, concentrates ultrasonic energy in a smaller area, increasing energy density and enhancing machining efficiency. Impedance matching and energy transmission optimization, acting as a bridge between the transducer and the tool head, adjust the mechanical impedance, reduce resonant impedance, improve electroacoustic conversion efficiency, and extend transducer life. Environmental isolation and system fixation: In high-temperature or corrosive environments, the boom isolates the transducer from harsh conditions and fixes the vibration system via a flange.

[0062] In one embodiment, the axial dimension of the amplitude transformer 300 is an integer multiple of the ultrasonic signal wavelength. For example, if the ultrasonic signal wavelength is 10 mm, the axial dimension of the amplitude transformer 300 is 20 mm, 30 mm, 40 mm, 50 mm, or other integer multiples thereof. In specific implementation, when the axial dimension of the amplitude transformer 300 is an integer multiple of the ultrasonic signal wavelength, the amplitude transformer 300 will resonate with the ultrasonic signal emitted by the ultrasonic transducer 210. In the resonant state, the amplitude transformer 300 can more effectively absorb ultrasonic energy and convert it into mechanical vibration, thereby improving energy conversion efficiency and enhancing the vibration amplitude and output power of the amplitude transformer 300.

[0063] That is, the amplitude transformer is a tuning device that amplifies the amplitude through expansion and contraction. It must also resonate at a specific frequency in order to transmit ultrasonic energy from the transducer to the clamp. In order to function effectively, the amplitude transformer must be an integer multiple of the wavelength of the ultrasonic wave in its manufacturing material, otherwise the amplitude will be easily canceled out.

[0064] It should be noted that a connecting flange 240 is fixedly connected between the ultrasonic transducer 210 and the amplitude transformer 300. The connecting flange 240 is used to fix the ultrasonic transducer 210 and the amplitude transformer 300. Preferably, the surface of the connecting flange 240 has threaded holes for installation with other equipment, which can be easily disassembled and assembled. The connecting flange 240, the ultrasonic transducer 250, the first matching block 220 and the second matching block 230 can be combined into a whole by threaded connection or other fastening methods. This integrated structure can improve the rigidity of the ultrasonic transducer 210 and reduce energy loss during vibration.

[0065] In some cases, the ultrasonic transducer 210 can be connected to other components via flanges or other connection structures to facilitate overall assembly and disassembly. This design facilitates the installation, maintenance, and replacement of the ultrasonic transducer 210.

[0066] In one embodiment, the amplitude rod 300 is axially telescopic.

[0067] In one specific embodiment, such as Figure 1 and Figure 2 As shown, a feasible structure for a chuck 500 is further provided. The chuck 500 is used for detachable connection with the tool 600, thereby enabling the detection of the tool 600. The chuck 500 is a micro tool holder.

[0068] In other embodiments, the chuck 500, the cutting tool 600, and the detection unit 400 are integrally formed. The detection unit 400 is built into the cutting tool 600 and abuts against the cutting tool 600. This can improve the detection accuracy, save detection space, and make it easy to replace the cutting tool 600 to adapt to ultrasonic processing of different materials.

[0069] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0070] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0071] Finally, it should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A tool holder for ultrasonic machining, characterized by It includes, from top to bottom, an ultrasonic transducer, an amplitude transformer, a detection unit, and a clamp; The ultrasonic transducer is used to emit a set ultrasonic signal; The amplitude transformer is used to convert the ultrasonic signal emitted by the ultrasonic transducer into mechanical vibration and transmit it to the clamp through the detection unit. The detection unit includes a housing, a support frame, and a sensor; the top of the housing is fixedly connected to the amplitude transformer, and the bottom of the housing is fixedly connected to the clamp; the support frame is disposed inside the housing, and each inner wall side of the support frame near the housing is provided with a multi-directional hinge, which is connected to the sensor; the support frame is used to ensure that the sensor is always in contact with the inner wall of the housing, and the sensor is used to detect the cutting deformation of the housing in different dimensions; the support frame includes multiple connection points, which are respectively arranged adjacent to each inner wall of the housing; the multi-directional hinges are connected to the connection points; the support frame includes multiple support rods, which are connected to each other to form a polygonal structure, and the connection points are the points where the sides of the polygonal structure are connected. The chuck is used to mount the cutting tool.

2. The tool holder according to claim 1, characterized in that The support rod is made of an elastic material so that the support frame elastically abuts the sensor against the inner wall of the housing.

3. The tool holder according to any one of claims 1 to 2, characterized in that The multi-directional hinge is a ball joint.

4. The tool holder according to any one of claims 1 to 2, characterized in that The sensor is a piezoelectric thin-film smart sensor.

5. The tool holder according to claim 1, wherein It also includes a controller, which is signal-connected to the sensor of the detection unit and the ultrasonic transducer, and is used to adjust the ultrasonic signal output by the ultrasonic transducer according to the signal detected by the sensor.

6. The tool holder according to claim 1, wherein The ultrasonic transducer includes a first matching block, a second matching block, and an ultrasonic transducer; The first matching block is located on the side of the ultrasonic transducer near the amplitude transformer, and the first matching block is connected to the ultrasonic transducer; The second matching block is located on the side of the ultrasonic transducer away from the amplitude transformer, and the second matching block is connected to the ultrasonic transducer; The first matching block and the second matching block are used to ensure the stability of the ultrasonic transducer when it undergoes ultrasonic vibration.

7. The tool holder according to claim 1, wherein The outer diameter of the amplitude transformer gradually decreases from the end near the ultrasonic transducer to the end near the detection section.

8. The tool holder according to claim 7, characterized in that The axial dimension of the amplitude transformer is an integer multiple of the wavelength of the ultrasonic signal.

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