An ultrasonic energy field and wire feeding mechanism integrated device and wire feeding method

Abstract

The application discloses an ultrasonic energy field and wire feeding mechanism integrated device and a wire feeding method. The application comprises a laser head, the laser head is fixed through a first square buckle and a second square buckle, the second square buckle is connected with a bearing fixing frame and an adjustable fixing frame, a linear bearing is installed on the bearing fixing frame, the adjustable fixing frame is connected with a super energy device fixing frame, an ultrasonic transducer, a fan and a wire positioning plate are installed in the super energy device fixing frame, and the wire passes through the linear bearing and the ultrasonic transducer. The application uses the ultrasonic transducer to drive the wire, the wire is stably fed, the end part of the wire is axially reciprocated at an ultrasonic frequency in a melting pool of additive manufacturing, the integration of the ultrasonic energy field and the wire feeding action is realized, the stable ultrasonic action in the additive manufacturing process is ensured, the ultrasonic directly acts on the melting pool, the attenuation of the ultrasonic in the propagation process is greatly reduced, the ultrasonic utilization rate is improved, and energy saving and environmental protection are achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of additive manufacturing, and particularly relates to a device integrating ultrasonic energy field and wire feeding mechanism and a wire feeding method. BACKGROUND

[0002] Laser additive manufacturing technology is based on a computer three-dimensional digital model, and utilizes the discrete-accumulation principle to form complex parts layer by layer. Due to the advantages of low cost, high efficiency and the ability to manufacture complex parts, laser additive manufacturing technology has been widely used in the fields of aerospace, nuclear energy, medical treatment and the like, and plays an indispensable role in the field of additive manufacturing. According to the processing raw material conveying mode, laser additive manufacturing technology can be divided into powder laser additive manufacturing and wire feeding laser additive manufacturing. Compared with powder additive manufacturing, wire feeding additive manufacturing has the advantages of high raw material utilization rate, close to 100%, high forming efficiency, no dust pollution and the like.

[0003] During laser forming, the material undergoes rapid heating and rapid cooling, and a large temperature gradient is generated between the molten pool and the substrate, forming coarse columnar crystals growing in the deposition direction, and forming large thermal stress and residual stress in the component. The coarse columnar crystals will exhibit anisotropy, making the material organization uneven in each part, thereby affecting the strength, toughness, plasticity and other properties of the parts. Residual stress and thermal stress make the component prone to cracks, pores and inclusions, and further affect the corrosion resistance, wear resistance and the like of the parts.

[0004] The components prepared by laser wire melting additive manufacturing often need to optimize the process or use other auxiliary means to improve the microstructure of the material to meet the use requirements. Among them, applying ultrasonic in the additive manufacturing process is an effective technology to improve the microstructure of laser wire deposition. The improvement of ultrasonic energy field assisted laser wire additive manufacturing technology on the organization is mainly due to the cavitation effect and acoustic streaming effect of ultrasonic in the micro-molten pool. The cavitation effect of ultrasonic in the micro-molten pool can effectively break the primary dendrite arms, and the broken dendrites will become new nucleation points, thereby increasing the nucleation rate and achieving the effect of refining the grains. On the other hand, the acoustic streaming effect of ultrasonic in the micro-molten pool can accelerate the convection of the molten pool, thereby uniforming the temperature field of the molten pool, reducing the temperature gradient, uniforming the solidification organization and reducing the segregation degree. However, the frequency of ultrasonic wave is higher than 20 kHz, and the temperature field of laser wire additive manufacturing is very complex, and the ultrasonic wave attenuates very seriously during propagation. Therefore, it is a big problem in the field of ultrasonic assisted laser wire additive manufacturing to effectively guide the ultrasonic wave into the molten pool.

[0005] In the working process of the conventional ultrasonic energy field assisted additive manufacturing or assisted welding device, the ultrasonic energy is not directly input into the molten pool, and the ultrasonic energy encounters multiple complex impedance interfaces from the transducer to the molten pool, resulting in serious ultrasonic attenuation and extremely low utilization rate. In addition, the conventional ultrasonic energy field assisted device is complex and bulky, and is inconvenient to install and adjust.

[0006] Investigation and research have found that the current ways of introducing ultrasonic energy into the molten pool mainly include the following: (1) the substrate and the ultrasonic generating device are rigidly connected, and the ultrasonic energy is transmitted to the molten pool through the substrate and the deposited layer. This method is simple to operate, but the position of the molten pool changes over time during work, resulting in unstable ultrasonic action and serious ultrasonic attenuation and low utilization rate. (2) a mechanical arm clamps an ultrasonic tool head to act on the deposited layer near the molten pool. In this method, the tool head moves with the molten pool, and stable ultrasonic action can be obtained, but the ultrasonic utilization rate is not high, and the mechanism is complex and has poor operability. (3) a tungsten needle is used to introduce ultrasonic vibration into the molten pool, and the ultrasonic stability and utilization rate are greatly improved, but under the combined action of laser and ultrasonic, the tungsten needle is easy to dissolve in the molten pool, thereby polluting the molten pool. SUMMARY

[0007] The purpose of the present application is to provide an ultrasonic energy field and wire feeding mechanism integrated device and a wire feeding method, which uses an ultrasonic transducer to replace the conventional mechanical wire feeding mechanism and ultrasonic auxiliary device, ensures the precision of the wire movement, and makes the wire entering the molten pool vibrate at the frequency of ultrasonic waves, while realizing the two actions of wire feeding and ultrasonic vibration.

[0008] The purpose of the present application is achieved by the following technical solutions:

[0009] An ultrasonic energy field and wire feeding mechanism integrated device, comprising: a laser head, the laser head is fixed through a connecting square buckle one and a square buckle two, the square buckle two is connected with a bearing fixed frame and an adjustable fixed frame, a linear bearing is installed on the bearing fixed frame, the adjustable fixed frame is connected with a super energy transducer fixed frame, an ultrasonic transducer, a fan and a wire positioning plate are installed in the super energy transducer fixed frame, and the wire passes through the linear bearing and the ultrasonic transducer.

[0010] Further, the ultrasonic transducer comprises a transducer head structure, a group of piezoelectric elements are arranged between the transducer head structure and the super energy transducer fixed frame, the piezoelectric elements comprise two circular ring-shaped piezoelectric ceramic sheets polarized in the axial direction and electrodes, the circular ring-shaped piezoelectric ceramic sheets and the electrodes are connected by a stud bolt, one end of the stud bolt is provided with a nut, the transducer head structure and the nut apply a pre-tightening force to the piezoelectric elements, the piezoelectric effect of the piezoelectric ceramic makes the ultrasonic transducer vibrate forcibly, the vibration track of the ultrasonic transducer is an ellipse, the tangential motion of the ellipse makes the wire enter the molten pool in the form of ultrasonic pulsation, and the radial motion of the ellipse is limited.

[0011] Further, the wire positioning plate is connected with the front guide tube, so that the wire entering the ultrasonic wire guide part is straight, and the resistance of the wire guide is reduced.

[0012] Further, the straight line bearing is inlaid with a group of balls inside, which greatly reduces the friction resistance while straightening the wire.

[0013] Further, the wire groove is provided on the structure of the transducer head, and the friction material layer is provided on the wire groove, so as to drive the wire to pass through the wire groove.

[0014] Further, the transducer fixing frame is provided with a groove inside, and the transducer fixing frame is installed in the groove, so that the position of the ultrasonic transducer is adjustable.

[0015] Further, the side of the transducer fixing frame close to the laser head is made of glass fiber plate, so as to prevent the temperature of the ultrasonic transducer from rising.

[0016] Further, the wire positioning plate is connected with the front guide tube, so that the wire entering the ultrasonic wire guide part is straight, and the resistance of the wire guide is reduced.

[0017] The application can also include:

[0018] A wire feeding method of the ultrasonic energy field and wire feeding mechanism integrated device as above, the method comprises:

[0019] During operation, specific voltages are input to the electrodes of the ultrasonic transducer, when the frequency of the input voltage reaches a certain order of natural frequency of the ultrasonic transducer, the ultrasonic transducer will resonate, and the inverse piezoelectric effect of the piezoelectric ceramic is utilized to make the transducer head structure do elliptical motion under the joint action of the pre-tightening force and the electric field, the elliptical motion is decomposed into radial motion and tangential motion, the tangential motion feeds the wire into the molten pool, and the radial motion is limited by the transducer fixing frame and the wire positioning plate, so that the motion of the wire and the ultrasonic transmission are combined, and the loss of the ultrasonic transmission at the interface is reduced.

[0020] Further, according to the relationship between the polarization direction and the vibration direction of the piezoelectric ceramic, the piezoelectric ceramic can generate various modes of vibration, when the polarization direction and the vibration direction are the same, the piezoelectric ceramic is in longitudinal vibration mode, and when the polarization direction and the vibration direction are perpendicular, the piezoelectric ceramic is in transverse vibration mode.

[0021] Further, specific voltages are input to the electrodes of the ultrasonic transducer, and the inverse piezoelectric effect of the piezoelectric element can excite two-phase orthogonal same-frequency vibration modes of the ultrasonic transducer, so as to obtain elliptical motion, and drive the wire to do ultrasonic motion.

[0022] The beneficial effects of this invention are as follows:

[0023] The ultrasonic motor of this invention applies simple harmonic vibrations at ultrasonic frequency to the molten pool while performing wire feeding, thereby integrating the ultrasonic energy field with wire feeding.

[0024] The present invention uses ultrasonic vibration to enter the molten pool, which eliminates the intermediate transmission link compared to the traditional method of applying ultrasound with an amplitude transformer, thus greatly improving the ultrasonic transmission efficiency; the high frequency of the wire movement and the small movement distance of the wire in each cycle enable high-precision control.

[0025] The device of this invention has a compact structure, is easy to install and maintain, is driven by a low-power ultrasonic motor with low noise, and can be extended to additive manufacturing and welding fields with other heat source forms.

[0026] This invention utilizes an ultrasonic motor to drive a wire. While the wire is stably fed, its end undergoes an axial reciprocating motion at an ultrasonic frequency within the molten pool of the additive manufacturing process. This integrates the ultrasonic energy field with the wire feeding action, ensuring stable ultrasonic action during additive manufacturing. The ultrasound acts directly on the molten pool, significantly reducing attenuation during propagation, improving ultrasound utilization, and saving energy and protecting the environment. The device is simple, easy to install, and suitable for wires of different diameters. Furthermore, the ultrasonic motor can adjust its position and angle according to the focal length of the laser head, ensuring the wire enters the molten pool at the optimal angle. In addition, this method is not limited by the heat source type in additive manufacturing and can be extended to additive manufacturing methods with other heat sources. This method is also applicable to the field of ultrasonic-assisted welding. Attached Figure Description

[0027] Appendix Figure 1 This is a structural schematic diagram of the invention from a first angle.

[0028] Appendix Figure 2 This is a structural schematic diagram of the second angle of the present invention.

[0029] Appendix Figure 3 This is a partial cross-sectional view of the present invention.

[0030] Appendix Figure 4 This is a schematic diagram of the structure of the ultrasonic transducer of the present invention.

[0031] Appendix Figure 5 This is a schematic diagram of the motion of the ultrasonic transducer of the present invention when the vibration trajectory is an ellipse.

[0032] In the attached diagram: 1: Laser head, 2: Square buckle one, 3: Nut, 4: Bolt, 5: Square buckle two, 6: Linear bearing fixing bracket, 7: Adjustable fixing bracket, 8: Linear bearing, 9: Wire material, 10: Ultrasonic transducer fixing bracket, 11: Fan, 12: Ultrasonic transducer, 13: Wire material positioning plate, 14: Fiberglass board, 15: Groove, 12-1: Nut, 12-2: Fixing bracket, 12-3: Piezoelectric ceramic, 12-4: Head, 12-5: Wire material groove, 12-6: Electrode. Detailed Implementation

[0033] The present invention will now be further described with reference to the accompanying drawings.

[0034] Example 1:

[0035] This embodiment provides a device integrating an ultrasonic energy field and a wire feeding mechanism, as shown in the attached diagram. Figures 1-2 As shown, it includes: a laser head 1, which is fixed by connecting square buckle 1 2 and square buckle 2 5. Square buckle 2 5 is connected to a bearing fixing frame 6 and an adjustable fixing frame 7. A linear bearing 8 is installed on the bearing fixing frame 6. The adjustable fixing frame 7 is connected to an ultrasonic transducer fixing frame 10. An ultrasonic transducer 10, a fan 11, and a wire positioning plate 13 are installed inside the ultrasonic transducer fixing frame 10. The wire 9 passes through the linear bearing 8 and the ultrasonic transducer 12.

[0036] In this embodiment, an adjustable mounting bracket 7 is used as a fixing device for the ultrasonic transducer. To accommodate different laser head focal lengths, the ultrasonic transducer is adjustable. Therefore, a groove 15 is used to install the ultrasonic transducer mounting bracket 12-2 in the groove, making the position of the ultrasonic transducer adjustable.

[0037] In this embodiment, a fixed frame 6 and a linear bearing 8 are used as the pre-guided filament mechanism. As is well known, the filaments in additive manufacturing are coiled, and straightening the filament as much as possible during use increases the filament feeding efficiency of the ultrasonic transducer and reduces ultrasonic loss. The linear bearing 8 has many regularly arranged balls embedded inside, which greatly reduces frictional resistance while straightening the filament, thus reducing the impact of the filament guide structure on the filament feeding of the ultrasonic transducer.

[0038] The ultrasonic transducer mounting bracket 10 has a groove 15 inside, which allows the position of the ultrasonic transducer 12 to be adjusted.

[0039] In this embodiment, a fiberglass board 14 is used as a heat insulation device. The side of the ultrasonic transducer mounting bracket 10 closest to the laser head 1 is made of fiberglass board 14 to prevent the temperature of the ultrasonic transducer from rising. The large amount of heat radiation generated during laser filament melting can cause the temperature of the ultrasonic transducer to rise, thus affecting its performance. Therefore, a fiberglass board is used to prevent the temperature of the ultrasonic transducer from rising.

[0040] The embodiment uses two fans 11 as heat dissipation mechanisms. Piezoelectric ceramics are very sensitive to temperature, and their piezoelectric properties will decrease with the increase of temperature. When the temperature is higher than the Curie point, piezoelectric ceramics will depolarize, and the piezoelectric effect will decrease. Therefore, two fans are used to reduce the temperature of piezoelectric ceramics during use.

[0041] The embodiment uses a wire positioning plate 13 as a wire guide and wire positioning device. The wire positioning plate 13 is connected with the front guide tube, which ensures that the wire entering the ultrasonic wire site is straight and reduces the resistance of the wire guide.

[0042] Firstly, the wire enters the front small hole and contacts with the groove of the ultrasonic transducer head, so that it enters the molten pool under the action of the ultrasonic transducer. Secondly, the bottom is connected with the ultrasonic transducer fixing frame 10 by four bolts, which can realize fine adjustment of the position of the wire and the ultrasonic transducer, and enhance the wire feeding effect of the transducer.

[0043] The embodiment uses an ultrasonic transducer as a wire feeding mechanism for additive manufacturing or welding process, so that the wire enters the molten pool in the form of ultrasonic pulsation, realizing the integration of ultrasonic energy field and wire feeding action. Two voltages with the same frequency and a phase difference of 90° are input to the ultrasonic transducer. When the frequency of the voltage is equal to the natural frequency of the ultrasonic transducer, mechanical resonance is generated under the joint action of pre-tightening force and electric field. According to the relationship between the polarization direction of piezoelectric ceramics and the vibration direction, the ultrasonic transducer can output an elliptical motion. The elliptical motion of the ultrasonic transducer is decomposed into radial motion and tangential motion, where the tangential motion drives the wire into the molten pool, and the radial direction is limited.

[0044] As shown in the accompanying drawings, Figures 3-4 The ultrasonic transducer 12 includes a transducer head structure 12-4, and a group of piezoelectric elements 12-3 between the transducer head structure 12-4 and the ultrasonic transducer fixing frame 12-2. The piezoelectric elements 12-3 include two circular ring-shaped piezoelectric ceramic sheets 12-3 polarized in the axial direction, and electrodes 12-6. The circular ring-shaped piezoelectric ceramic sheets 12-3 and the electrodes 12-6 are connected by a double-headed bolt, one end of which is provided with a nut 12-1. The transducer head structure 12-4 and the nut 12-1 apply pre-tightening force to the piezoelectric elements 12-3. The piezoelectric effect of the piezoelectric ceramics 3 causes the ultrasonic transducer 12 to vibrate forcibly, and the vibration trajectory is an ellipse. The tangential motion of the ellipse makes the wire enter the molten pool in the form of ultrasonic pulsation, and the radial motion of the ellipse is limited.

[0045] The transducer head structure 12-4 has a wire groove 12-5, and the wire groove 12-5 has a layer of friction material to drive the wire 9 through the wire groove.

[0046] A set of piezoelectric elements is composed of two circular ring-shaped piezoelectric ceramic sheets polarized in the axial direction, and the front metal part and the rear nut apply a pre-tightening force to the piezoelectric elements. By inputting a specific voltage to the electrodes of the ultrasonic transducer, two-phase orthogonal vibration modes of the same frequency of the ultrasonic transducer can be excited by using the inverse piezoelectric effect of the piezoelectric elements, so that elliptical motion is obtained, and the wire is driven to ultrasonic motion.

[0047] The application uses the ultrasonic transducer to simultaneously realize wire feeding and ultrasonic vibration, directly makes the wire entering the molten pool realize ultrasonic vibration, greatly reduces the attenuation of ultrasonic, makes the ultrasonic stably produce cavitation and acoustic streaming effect in the molten pool, promotes the flow of the melt, reduces the temperature gradient, and thus achieves the purposes of refining grains, inhibiting cracks, reducing pores and other defects.

[0048] The ultrasonic transducer 12 in the embodiment is the key to realize the wire motion and ultrasonic vibration. Specifically, in the ultrasonic transducer, the nut 1 is fastened with the internal double-headed bolt, on the one hand, to install the piezoelectric ceramic and the electrode, and on the other hand, to apply a pre-tightening force to the piezoelectric ceramic 3. By inputting a specific voltage into the piezoelectric ceramic 3, through the action of the electric field, the relative displacement of the positive and negative charges in the piezoelectric ceramic will be caused, resulting in the deformation of the material. Through the interaction of the pre-tightening force and the electric field, the inherent vibration of the piezoelectric ceramic is excited, so that when the frequency is close to the inherent frequency of the ultrasonic transducer 12, resonance is generated, and the amplitude is increased. The piezoelectric effect of the piezoelectric ceramic 3 is used to make the ultrasonic transducer 12 produce forced vibration, and the vibration trajectory is an ellipse. The tangential motion of the ellipse makes the wire enter the molten pool in the form of ultrasonic pulsation, and the radial motion of the ellipse is limited.

[0049] The circular ring-shaped thin plate piezoelectric ceramic is used in the application, and the inherent vibration thereof is divided into out-of-plane inherent vibration and in-plane inherent vibration. The out-of-plane inherent vibration refers to that the thin plate only has displacement in the z-axis direction , and the displacement in the directions of and . The in-plane vibration is opposite , and the displacement is in the directions of .

[0050] Through mathematical analysis, the out-of-plane inherent vibration mode frequency of the circular ring-shaped piezoelectric ceramic is:

[0051] (1)

[0052] In the formula, is the out-of-plane inherent vibration mode frequency, is the out-of-plane vibration mode constant of the circular ring-shaped thin plate (depends on b / a, b is the inner diameter), a is the outer diameter, D is the bending stiffness, h is the thickness, is the density.

[0053] The in-plane natural vibration frequency of the circular ring piezoelectric ceramic is:

[0054] (2)

[0055] In the formula, E is the elastic modulus, is the Poisson's ratio.

[0056] The elliptical motion law of the ultrasonic transducer is shown in the attached figure. Figure 5 When t=0, the ultrasonic transducer head is located at the left end of the elliptical motion, and the wire is in contact with the ultrasonic transducer head. In the interval of 0

[0057] The circular ring piezoelectric ceramic described above is a piezoelectric vibrator, characterized in that the piezoelectric ceramic itself is an elastic body, and has infinite natural frequencies. When the frequency of the voltage applied to the piezoelectric ceramic is equal to a certain order of natural frequency, mechanical resonance is generated under the joint action of the pre-tightening force and the electric field. According to the relationship between the polarization direction of the piezoelectric ceramic and the vibration direction, the piezoelectric ceramic can generate various modes of vibration. When the polarization direction and the vibration direction are the same, the piezoelectric ceramic is in longitudinal vibration mode at this time. When the polarization direction and the vibration direction are perpendicular, it is in transverse vibration mode.

[0058] The working mode of the ultrasonic transducer described above, the two groups of piezoelectric ceramics of the ultrasonic transducer do the longitudinal vibration in opposite directions, exciting the anti-symmetric vibration of the ultrasonic transducer.

[0059] The excitation mode of the ultrasonic transducer described above, the same frequency and 90° phase difference voltage is input to the two groups of piezoelectric ceramics, exciting the vibration mode of the ultrasonic transducer, so that it generates elliptical motion, the tangential motion of the ellipse drives the wire to move forward, and the radial motion of the ellipse is limited.

[0060] The present application utilizes the inverse piezoelectric effect of piezoelectric ceramics, and under the joint action of pre-tightening force and electric field, the transducer head makes elliptical motion, which can be decomposed into radial motion and tangential motion, the tangential motion sends the wire into the molten pool, and the radial motion is limited by the ultrasonic transducer fixing frame 10 and the wire positioning plate 13.

[0061] Embodiment 2:

[0062] The ultrasonic energy field and wire feeding mechanism integrated device according to embodiment 1, combined with the attached Figures 1-3 , the installation steps of the device are as follows:

[0063] Step 1: install the ultrasonic transducer 12;

[0064] Step 2: fix the ultrasonic transducer 12 and the fan 11 to the ultrasonic transducer fixing frame 10;

[0065] Step 3: install the square buckle 2 and the square buckle 5 to the laser head 1;

[0066] Step 4: install the linear bearing fixing frame 6 and the adjustable fixing frame 7 to the square buckle 4;

[0067] Step 5: according to the focal length of the laser used, install the ultrasonic transducer fixing frame 10 to the appropriate position of the adjustable fixing frame 7;

[0068] Step 6: install the linear bearing 8 to the linear bearing fixing frame 6;

[0069] Step 7: pass the wire 9 through the linear bearing 8;

[0070] Step 8: fix the wire positioning plate 13 to the ultrasonic transducer fixing frame 10, and adjust the relative position of the wire and the ultrasonic transducer 12;

[0071]

[0072] Step 9: install the glass fiber plate 14 to the ultrasonic transducer fixing frame 10.

[0073] The present application first vibrates the wire directly into the molten pool at ultrasonic frequency, without intermediate transmission, greatly reducing the attenuation of ultrasonic. Secondly, its structure is simple, occupies small space, is relatively easy to realize high vacuum environment, has strong adaptability to additive manufacturing, and can also be extended to other heat source form of additive manufacturing.

[0074] On the other hand, due to the similarity between laser wire additive manufacturing and welding process and the small size and compact structure of the present ultrasonic energy field and wire feeding mechanism integrated device, it is also suitable for the welding field, and the ultrasonic energy field is introduced into the welding process to improve the welding quality. ​

[0075] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An apparatus for integrating an ultrasonic energy field with a wire feed mechanism, comprising: a wire feed mechanism; an ultrasonic energy field generator; and a coupling device for coupling the wire feed mechanism to the ultrasonic energy field generator. It includes: The laser head (1) is fixed by connecting square buckle one (2) and square buckle two (5), square buckle two (5) is connected with bearing fixed frame (6) and adjustable fixed frame (7), linear bearing (8) is installed on bearing fixed frame (6), adjustable fixed frame (7) is connected with super energy ware fixed frame (10), ultrasonic transducer (12), fan (11) and wire positioning plate (13) are installed in super energy ware fixed frame (10), wire (9) passes through linear bearing (8) and ultrasonic transducer (12); The ultrasonic transducer (12) includes transducer head structure (12-4), a group of piezoelectric elements (12-3) between transducer head structure (12-4) and super energy ware fixed frame (10), piezoelectric elements (12-3) include two circular ring piezoelectric ceramic sheets polarized along the axis, electrode (12-6), circular ring piezoelectric ceramic sheet and electrode (12-6) are connected by stud bolt, one end of stud bolt is provided with nut (12-1), transducer head structure (12-4) and nut (12-1) apply pre-tightening force to piezoelectric elements (12-3), piezoelectric effect of piezoelectric ceramic makes ultrasonic transducer (12) produce forced vibration, the vibration track is ellipse, the tangential motion of ellipse makes wire enter the molten pool in the form of ultrasonic pulse, the radial motion of ellipse is limited; Specific voltage is input to the electrode (12-6) of the ultrasonic transducer (12), two-phase orthogonal same frequency vibration modes of the ultrasonic transducer can be excited by using the inverse piezoelectric effect of the piezoelectric element, so as to obtain elliptical motion, and drive the wire (9) to make ultrasonic motion.

2. The apparatus of claim 1, wherein the ultrasonic energy field is integrated with the wire feed mechanism. The wire positioning plate (13) is connected with the front guide pipe, so that the wire entering the ultrasonic guide wire part is straight, and the resistance of the guide wire is reduced.

3. The apparatus of claim 1, wherein the ultrasonic energy field is integrated with the wire feed mechanism. The linear bearing (8) is inlaid with a group of balls, which greatly reduces the friction resistance while straightening the wire (9).

4. The apparatus of claim 1, wherein the ultrasonic energy field is integrated with the wire feed mechanism. The transducer head structure (12-4) has a wire groove (12-5), and the wire groove (12-5) has a friction material layer to drive the wire (9) to pass through the wire groove.

5. The apparatus of claim 1, wherein the ultrasonic energy field is integrated with the wire feed mechanism. The super energy ware fixed frame (10) is close to the glass fiber plate (14) on one side of the laser head (1), which prevents the temperature of the ultrasonic transducer from rising.

6. The apparatus of claim 1, wherein the ultrasonic energy field is integrated with the wire feed mechanism. The wire positioning plate (13) is used as a guide wire and wire positioning device, and is connected with the front guide pipe, so that the wire entering the ultrasonic guide wire part is straight, and the resistance of the guide wire is reduced.

7. A method of wire feeding for a device for the integration of an ultrasonic energy field and a wire feeding mechanism according to one of claims 1 to 6, characterized in that The method comprises: In operation, specific voltage is input to the electrodes (12-6) of the ultrasonic transducer (12) respectively, when the frequency of the input voltage reaches a certain order natural frequency of the ultrasonic transducer (12), the ultrasonic transducer (12) will resonate, using the inverse piezoelectric effect of piezoelectric ceramic, the transducer head structure (12-4) makes elliptical motion under the joint action of pre-tightening force and electric field, the elliptical motion is decomposed into radial motion and tangential motion, the tangential motion sends the wire into the molten pool, the radial motion is limited by the ultrasonic transducer holder (10) and the wire positioning plate (13), the combination of the wire motion and the ultrasonic transmission reduces the loss of the ultrasonic transmission at the interface.

8. The wire feeding method of the apparatus integrating the ultrasonic energy field and the wire feeding mechanism according to claim 7, characterized by, According to the relationship between the polarization direction of the piezoelectric ceramic and the vibration direction, the piezoelectric ceramic can produce various modes of vibration, when the polarization direction and the vibration direction are the same, the piezoelectric ceramic is in longitudinal vibration mode, and when the polarization direction and the vibration direction are perpendicular, it is in transverse vibration mode.

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