Ultrasonic laminated additive manufacturing equipment with intelligent structure

Abstract

The invention provides ultrasonic laminated additive manufacturing equipment with an intelligent structure. The ultrasonic laminated additive manufacturing equipment comprises an ultrasonic consolidation system, a pressing system, a working platform system, a control system and a hood, the ultrasonic consolidation system comprises two transducers which are coaxially connected and form a push-pull structure and a cylindrical ultrasonic welding head in the middle, the maximum ultrasonic amplitude of 40 microns can be provided, and it is ensured that uniform and efficient energy is applied to the surface of the material in the consolidation process. The pressing system not only drives the ultrasonic consolidation system to move up and down along the Z axis, but also can provide a maximum pressing force of 30kN, and can apply uniform and stable pressing on the surface of the material. And the working platform system accurately moves along an XY plane so as to meet the requirement of continuous consolidation forming of the intelligent structure. The control system accurately regulates and controls various parameters of equipment to ensure stable operation of the system. According to the invention, the integration and automation of ultrasonic laminated additive manufacturing are realized by adopting the functions of closed-loop control, integrated load accurate application, servo driving / ultrasonic vibration compound control, pressure / amplitude real-time detection and the like.

Description

Technical Field

[0001] The present invention belongs to the field of additive manufacturing, and relates to an intelligent structure ultrasonic laminated additive manufacturing device integrating precise application of load, composite control of servo drive / ultrasonic vibration, and real-time detection of pressure / amplitude. Background Art

[0002] An intelligent structure refers to a structure that can sense, respond to, and adjust changes in the external environment or internal state by integrating various functional devices such as sensors, actuators, and electronic components. Intelligent structures have characteristics such as self-adaptation, self-monitoring, and self-repair, and can monitor their own health status in real time during use, improving the safety, reliability, and long-term stability of the structure.

[0003] Ultrasonic additive manufacturing technology uses high-power ultrasonic energy, takes metal foils as raw materials, and utilizes the heat generated by the vibration friction between metal layers to promote the mutual diffusion of metal atoms at the interface to form solid-state metallurgical bonding, thereby realizing the emerging additive manufacturing technology of layer-by-layer accumulation. Compared with traditional additive manufacturing technologies (such as laser melting or electron beam melting), ultrasonic laminated additive manufacturing has a lower heat-affected zone, can effectively avoid the problems of thermal stress and thermal deformation during the manufacturing process, and is suitable for the embedding of heat-sensitive functional devices, especially showing unique advantages in the preparation of intelligent structures. During the preparation of intelligent structures, it is often necessary to integrate different functional devices (such as sensors, actuators, composite materials, etc.) into the structure. International leading research has been able to achieve efficient bonding of metals and functional devices, but domestic research on multi-material stacking and intelligent structure manufacturing is still in the exploratory stage. Especially under complex working conditions such as high temperature and high pressure, how to achieve non-destructive bonding between materials and performance optimization is the current research difficulty. In addition, the accuracy and stability of ultrasonic additive manufacturing technology are the basis for its application. Foreign countries have made certain progress in equipment automation and process accuracy, but there is still a gap in domestic equipment manufacturing and process control technology. Especially in the application of high-precision control and closed-loop feedback control systems, the capabilities of some domestic manufacturers in achieving high-precision laminated manufacturing, micron-level layer thickness control, and precise embedding of components have not reached the international leading level.

[0004] Therefore, aiming at the problems of domestic ultrasonic additive manufacturing equipment in many aspects such as manufacturing accuracy, material adaptability, and process control, research and develop special process equipment for intelligent structure ultrasonic laminated additive manufacturing, and use equipment with a high-precision ultrasonic vibration control system and multi-functional material deposition technology to ensure the efficient and precise manufacturing of intelligent structures, solve the problems of low material bonding strength, poor structural stability, and embedding of functional devices during the ultrasonic additive manufacturing process, comprehensively improve the manufacturing accuracy, process control, and intelligent structure integration ability of the equipment, and promote the rapid development and sustainable development of products in high-end manufacturing fields such as aerospace. Summary of the Invention

[0005] To this end, the present invention provides a special device for intelligent structure ultrasonic laminated additive manufacturing, which integrates functions such as precise load application, servo drive / ultrasonic vibration composite control, and real-time detection of pressure / amplitude. It overcomes the problems of low material bonding strength, poor structural stability, and embedding of functional devices in the current ultrasonic additive manufacturing process, and comprehensively improves the manufacturing accuracy, process control, and intelligent structure integration ability of the device.

[0006] The present invention discloses an intelligent structure ultrasonic laminated additive manufacturing device, including an ultrasonic consolidation system, a downward pressure system, a workbench system, a control system, and a machine cover, as Figure 3 shown. The ultrasonic consolidation system includes a first transducer, a first amplitude modulator, an ultrasonic welding head, a second amplitude modulator, and a second transducer connected coaxially in sequence. A cylindrical pressing roller is coaxially arranged in the middle of the ultrasonic welding head. The first transducer and the second transducer are respectively installed on both sides of the ultrasonic welding head through the first amplitude modulator and the second amplitude modulator to form a push-pull combined control structure. A first connecting shaft is formed at the connection node of the first transducer and the first amplitude modulator, and a second connecting shaft is formed at the connection node of the second transducer and the second amplitude modulator. A synchronous pulley is fixed on the second connecting shaft through a wheel hole. The outer end of the first transducer is connected to a power device through a first conductive slip ring, and the outer end of the second transducer is connected to a power device through a second conductive slip ring.

[0007] The downward pressure system includes a Z-axis servo motor, a Z-axis ball screw, a Z-axis linear guide, a Z-axis slider, and a pressing plate, as Figure 2 and Figure 5 shown. The ultrasonic consolidation system is fixedly installed on a square pressing plate. The pressing plate is fixedly installed on the Z-axis slider. The Z-axis slider is connected to the Z-axis ball screw, and the Z-axis ball screw is connected to the Z-axis servo motor. The Z-axis servo motor drives the Z-axis ball screw to rotate by using a torque control method. The Z-axis slider moves linearly along the Z-axis linear guide under the drive of the Z-axis ball screw. The ultrasonic consolidation system contacts the workbench and stops moving and applies a preset pressure under the drive of the Z-axis slider and the Z-axis pressing plate.

[0008] The workbench system includes an X-axis servo motor, a Y-axis servo motor, an X-axis ball screw, a Y-axis ball screw, an X-axis linear guide, a Y-axis linear guide, an X-axis slider, a Y-axis slider, a frame, and a workbench, as Figure 2 and Figure 5As shown, the working platform is a square metal plate, on which T-shaped grooves for material fixation are machined. It is fixed on the X-axis slider, and the X-axis linear guide is fixed on the machine frame. The machine frame is fixed on the Y-axis slider. The X slider is connected to the X-axis ball screw, and the X-axis ball screw is connected to the X-axis servo motor. The X-axis servo motor drives the X-axis ball screw to rotate by means of displacement control. The X-axis slider moves linearly along the X-axis linear guide under the drive of the X-axis ball screw, and the working platform makes precise movement in the X direction under the drive of the X-axis slider. The connection method and control method of the Y axis are the same as those of the X axis, and the machine frame makes precise movement in the Y direction under the drive of the Y-axis slider.

[0009] The control system is based on the upper and lower computer control mode and industrial Ethernet communication, adopts full digital closed-loop control, and automatically controls the ultrasonic consolidation system, the downward pressure system and the working platform system in real time.

[0010] The intelligent structure ultrasonic additive manufacturing equipment is protected by the machine cover. As Figure 1 shown, the machine cover is a square sheet metal shield, located outside the equipment main body, wrapping the equipment main body part therein, and the circuits of the equipment are arranged and connected in series in the machine cover.

[0011] In some embodiments, as Figure 3 shown, the first transducer and the second transducer are composed of a cylindrical piezoelectric ceramic element as the core part, surrounded by a matching layer and a backing material to optimize the transmission and reception of sound waves, allowing them to emit and receive ultrasonic waves uniformly in the circumferential direction, and being suitable for applications that require continuous beams or sound wave coverage in a specific circumferential area. Gas input devices for cooling them by introducing gas are provided on both the first transducer and the second transducer. A rotary joint is provided on the first conductive slip ring connected to the outer end of the first transducer. One end of the rotary joint is connected to the intake pipe, and the other end of the rotary joint is connected to the gas input device on the first transducer. A rotary joint is provided on the second conductive slip ring connected to the outer end of the second transducer. One end of the rotary joint is connected to the intake pipe, and the other end of the rotary joint is connected to the gas input device on the second transducer.

[0012] In some embodiments, as Figure 3 shown, the first amplitude modulator and the second amplitude modulator are of cylindrical structure, and the amplitude modulation ratio is 2:1. They can achieve frequency conversion, generate sidebands and harmonic components, and select the required ultrasonic frequency components through a selective circuit and filter out other components.

[0013] In some embodiments, as Figure 3As shown, the first conductive slip ring and the second conductive slip ring are of annular structure and are fixed on the rotating shaft of the ultrasonic consolidation system, capable of realizing continuous transmission of electric energy and signals under the rotating state of the ultrasonic consolidation system.

[0014] In some instances, such as Figure 3 As shown, the ultrasonic consolidation system further includes a square device fixing plate at the top, and the outer ends of the first conductive slip ring and the second conductive slip ring are respectively fixedly connected to the device fixing plate at the top through hanging plates.

[0015] In some instances, the ultrasonic consolidation system is connected to an ultrasonic generator, and the ultrasonic generator further causes the ultrasonic welding head to generate mechanical vibration by transmitting high-frequency electrical signals to the first transducer and the second transducer.

[0016] In some embodiments, the downward pressing system includes a pressure sensor, and the pressure sensor is installed in the pressing plate and moves with the pressing plate for measuring and feedback of the downward pressure.

[0017] In some embodiments, the control system may include a touch screen, an industrial personal computer, and a PLC system. Control parameters are input into the PLC system through the touch screen or the industrial personal computer; the PLC system is used for collecting the detection data of each system and controlling the start and stop of the X-axis servo motor, Y-axis servo motor, Z-axis servo motor, and the ultrasonic generator.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1) The present invention can realize three control modes: automatic, semi-automatic, and manual, ensuring the consistency and stability of the quality of ultrasonic consolidation products;

[0020] 2) The ultrasonic consolidation system of the present invention uses a push-pull transducer structure. Through the cooperative action of two transducers, the power of the ultrasonic consolidation system can be increased to 10 kW, and the maximum amplitude of the ultrasonic welding head can reach 40 μm;

[0021] 3) The present invention adopts torque mode to control the servo motor of the downward pressing system, which can provide a maximum downward pressure of 30 kN and apply uniform and stable pressing to the material surface;

[0022] 4) The working platform system of the present invention can perform precise planar movement according to control parameters, and the accuracy can reach ±0.02 mm, meeting the requirements of continuous consolidation forming of intelligent structures;

[0023] 5) The control system of the present invention can adopt industrial Ethernet communication, with fast data transmission speed and strong anti-interference ability, and can realize remote monitoring. Description of the Drawings

[0024] Figure 1Schematic diagram of the intelligent structure ultrasonic laminated additive manufacturing equipment of the present invention.

[0025] Figure 2 Schematic diagram of the main part of the intelligent structure ultrasonic additive manufacturing equipment of the present invention.

[0026] Figure 3 Schematic diagram of the ultrasonic consolidation system of the present invention.

[0027] Figure 4 Schematic diagram of the principle of ultrasonic laminated additive manufacturing of the present invention.

[0028] Figure 5 Schematic diagram of the downward pressure system of the present invention.

[0029] Figure 6 Schematic diagram of the control system of the present invention.

[0030] Figure 7 Schematic diagram of the touch screen parameter setting interface of the present invention.

[0031] Figure 8 Schematic diagram of the touch screen operation interface of the present invention.

[0032] Figure 9 Schematic diagram of the working process of the present invention.

[0033] The descriptions of the reference numerals in the figure are as follows:

[0034] 1. Ultrasonic consolidation system; 2. Touch screen; 3. Downward pressure system; 4. Working platform system; 5. Machine cover;

[0035] 1-1. Ultrasonic welding head; 1-2. First amplitude modulator; 1-3. First transducer; 1-4. First conductive slip ring;

[0036] 1-5. Second amplitude modulator; 1-6. Second transducer; 1-7. Second conductive slip ring; 1-8. Power device;

[0037] 1-9. Synchronous belt pulley; 1-10. Synchronous belt; 1-11. Device fixing plate;

[0038] 3-1. Z-axis servo motor; 3-2. Z-axis ball screw; 3-3. Z-axis linear guide; 3-4. Z-axis slider;

[0039] 3-5. Pressure plate;

[0040] 4-1. X-axis servo motor; 4-2. X-axis ball screw; 4-3. X-axis linear guide; 4-4. X-axis slider;

[0041] 4-5. Y-axis servo motor; 4-6. Y-axis ball screw; 4-7. Y-axis linear guide; 4-8. Y-axis slider;

[0042] 4 - 9, working platform; 4 - 10, frame. Detailed implementation manner

[0043] In order to more clearly understand the above - mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made to the embodiments of the present invention, and these all belong to the protection scope of the present invention.

[0044] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0045] This embodiment provides a special device for intelligent structural ultrasonic laminated additive manufacturing, which includes five parts: an ultrasonic consolidation system, a downward pressure system, a working platform system, a control system and a machine cover. As Figure 1 shown, each part will be further described in detail below with reference to the accompanying drawings.

[0046] The ultrasonic consolidation system 1 of this embodiment includes as Figure 3The first transducer 1-3, the first amplitude modulator 1-2, the ultrasonic welding head 1-1, the second amplitude modulator 1-5, and the second transducer 1-6 are coaxially connected in sequence as shown. The ultrasonic welding head 1-1 is a full-wavelength welding head. The vibration frequencies of the first transducer 1-3 and the second transducer 1-6 are both 20 kHz. The amplitude modulation ratios of the first amplitude modulator 1-2 and the second amplitude modulator 1-5 are both 2:1. The ultrasonic welding head 1-1 is a cylindrical pressing roller coaxially arranged in the middle. The first transducer 1-3 and the second transducer 1-6 are respectively installed on both sides of the ultrasonic welding head 1-1 through the first amplitude modulator 1-2 and the second amplitude modulator 1-5. Among them, the piezoelectric ceramics in the first transducer 1-3 and the piezoelectric ceramics symmetrically distributed in the second transducer 1-6 have opposite polarization directions at any moment. The push-pull structure is realized by the way that the piezoelectric ceramics in the two symmetrically distributed transducers have opposite polarization directions at any moment. A connecting shaft is formed at the connection node of the second transducer 1-6 and the second amplitude modulator 1-5. A synchronous pulley 1-9 is fixed on the connecting shaft through a wheel hole. The synchronous pulley 1-9 is connected to the power device 1-8 through a synchronous belt 1-10. The outer end of the first transducer 1-3 is connected to the power device through a first conductive slip ring 1-4. The outer end of the second transducer 1-6 is connected to the power device through a second conductive slip ring 1-7. The ultrasonic consolidation system 1 of this embodiment further includes a device fixing plate 1-11 at the top, which is connected to the pressing plate in the pressing system 3 through the mounting holes on the device fixing plate 1-11, and the precise application of pressure can be realized.

[0047] Specifically, as Figure 4 shown, the working principle of the ultrasonic laminated additive manufacturing is to use high-power ultrasonic energy, take metal foil as raw material, and utilize the heat generated by the vibration friction between metal layers to promote the mutual diffusion of metal atoms at the interface to form solid-state metallurgical bonding, so as to realize the layer-by-layer accumulation of metal materials. Under continuous ultrasonic vibration, high-frequency friction will occur between two layers of metal foil. The oxides and pollutants covering the metal surface are stripped off, exposing the pure metal inside. Then, the ultrasonic vibration and static pressure soften the relatively pure metal material and fill it on the surface of the metal foil that has been welded. In this process, the atoms of the two metal foils will penetrate and fuse with each other, further improving the strength of the welding interface. This process is repeated layer by layer until the additive manufacturing of complex components is finally completed.

[0048] Specifically, as Figure 2 and Figure 4 shown, the working mode of the ultrasonic consolidation system 1 is to select a metal plate with a certain thickness as the consolidation substrate, fix the first layer of metal foil on the substrate, and at Figure 1Set control parameters on the shown touch screen 2, start the intelligent structural ultrasonic laminated additive manufacturing equipment, the ultrasonic welding head 1-1 starts to rotate and performs ultrasonic vibration under the drive of the first transducer 1-3 and the second transducer 1-6. The pressing system 2 drives the ultrasonic consolidation system 1 to approach and contact the first layer of foil. After contact, the ultrasonic welding head 1-1 applies ultrasonic vibration to the foil in the Y-axis direction and applies a downward pressure in the Z-axis direction. At the same time, the X-axis servo motor 4-1 drives the X-axis ball screw 4-2 to control the working platform 4-9 to move forward along the X-axis direction, and consolidates the first layer of metal foil with the consolidation substrate. Then, while the ultrasonic welding head 1-1 is lifted under the drive of the Z-axis servo motor 3-1, the Y-axis servo motor 4-5 drives the Y-axis screw 4-6 to control the working platform 4-9 to translate forward along the Y-axis. Repeat the above consolidation process, and closely arrange each strip of foil with the previous one to obtain a metal matrix formed by consolidating multiple metal foils.

[0049] The pressing system 3 of this embodiment includes as Figure 2 and Figure 5 shown Z-axis servo motor 3-1, Z-axis ball screw 3-2, Z-axis linear guide 3-3, Z-axis slider 3-4 and pressing plate 3-5. The ultrasonic consolidation system 1 is fixed on the pressing plate 3-5 through the device fixing plate 1-11. The pressing plate 3-5 is fixed on the Z-axis slider 3-4. The Z-axis slider 3-4 is connected to the Z-axis ball screw 3-2. The Z-axis ball screw 3-2 is connected to the Z-axis servo motor 3-1. The Z-axis servo motor 3-1 drives the Z-axis ball screw 3-2 to rotate by using a torque control method. The Z-axis slider 3-4 performs a linear motion along the Z-axis linear guide 3-3 under the drive of the Z-axis ball screw 3-2. The ultrasonic consolidation system 1 is driven by the Z-axis slider 3-4 and the pressing plate 3-5, contacts the working platform 4-9 and stops moving and applies a preset pressure.

[0050] The working platform system 4 of this embodiment includes as Figure 2The X-axis servo motor 4-1, Y-axis servo motor 4-5, X-axis ball screw 4-2, Y-axis ball screw 4-6, X-axis linear guide 4-3, Y-axis linear guide 4-7, X-axis slider 4-4, Y-axis slider 4-8, frame 4-10 and working platform 4-9 shown. The working platform 4-9 is fixed on the X-axis slider 4-4. The X-axis linear guide 4-3 is fixed on the frame 4-10. The frame 4-10 is fixed on the Y-axis slider 4-8. The X slider 4-4 is connected to the X-axis ball screw 4-2. The X-axis ball screw 4-2 is connected to the X-axis servo motor 4-1. The X-axis servo motor 4-1 drives the X-axis ball screw 4-2 to rotate by means of displacement control. The X-axis slider 4-4 moves linearly along the X-axis linear guide 4-3 under the drive of the X-axis ball screw 4-2. The working platform 4-9 makes precise movement in the X direction under the drive of the X-axis slider 4-4. The connection method and control method of the Y-axis are the same as those of the X-axis. The frame 4-10 makes precise movement in the Y direction under the drive of the Y-axis slider 4-8.

[0051] The control system of this example adopts the upper and lower computer control mode and closed-loop control to achieve precise monitoring and control of the additive manufacturing equipment. As Figure 6 shown, the upper computer system mainly includes a touch screen 2 and an industrial computer, which are responsible for monitoring the real-time state of the additive manufacturing equipment and inputting control parameters into the PLC system through the touch screen 2 or the industrial computer. The lower computer system mainly includes a PLC system. The PLC system can collect data of pressure sensors, ultrasonic generators and servo motors, and control the start and stop of 3 servo motors and ultrasonic generators to ensure the accuracy and stability of the equipment operation. The actual working parameters measured by the pressure sensor and the ultrasonic generator can be input through the analog input module, and the control value can be output through the analog output module to adjust the corresponding pressure and ultrasonic amplitude to achieve closed-loop control. In particular, the industrial computer of the control system in this embodiment uses industrial Ethernet communication, which has strong anti-interference ability and has intelligent functions such as database and process parameter analysis. The touch screen 2 uses serial communication to be able to display experimental data in real time and input control parameters, enabling operators to intuitively monitor and control the entire additive manufacturing equipment.

[0052] The machine cover 5 of this embodiment is a square sheet metal cover, which is located outside the equipment main body and wraps the equipment main body part. The circuits inside the equipment are arranged and connected in series in the machine cover 5.

[0053] The present invention will be further described below through the specific forming method and working process of the present invention. Taking the ultrasonic additive manufacturing process of aluminum alloy foil as an example, combined with Figure 9 shown, the specific process is as follows:

[0054] First step, material clamping: Clamp the aluminum alloy substrate onto the working platform 4-9, and place the aluminum alloy foil to be ultrasonically consolidated under the ultrasonic welding head 1-1.

[0055] Second step, ultrasonic parameter setting: Set the ultrasonic amplitude to 30% on the parameter setting interface displayed on the touch screen 2 ( Figure 7 ). The maximum ultrasonic amplitude of the equipment is 40μm, and 30% represents 12μm. After parameter setting, observe Figure 8 the ultrasonic monitoring interface on the right. If the vibration indication shows normal, then the ultrasonic self-check is normal and the next step can be entered. If the ultrasonic self-check is abnormal, the vibration indication shows emergency stop. Wait for the system to perform ultrasonic correction until the vibration indication shows normal and then enter the next step.

[0056] Third step, pressure parameter setting: Set the descending pressure to 3000N on the parameter setting interface displayed on the touch screen 2 ( Figure 7 ). After parameter setting, observe Figure 8 the pressure monitoring interface on the right. If the pressure indication shows normal, then the pressure setting is normal and the next step can be entered. If the pressure feedback is abnormal, the pressure indication shows emergency stop. Wait for the system to perform pressure correction until the pressure indication shows normal and then enter the next step.

[0057] Fourth step, speed and distance parameter setting: Set the X-axis moving speed and distance to 10mm / s and 140mm respectively, and set the Y-axis moving speed and distance to 10mm / s and 22mm on the parameter setting interface displayed on the touch screen 2 ( Figure 7 ).

[0058] Fifth step, the working platform returns to the origin: After completing the above parameter settings, click "Position Clear" on the operation interface displayed on the touch screen 2 ( Figure 8 ). The working platform returns to the origin, and the positions of the X-axis and Y-axis on the corresponding position monitoring display 0mm.

[0059] Sixth step, the device presses down: Click the "Descend" button on the operation interface displayed on the touch screen 2 ( Figure 8 ). The Z-axis servo motor 3-1 in the pressing-down system 3 starts according to the given descending pressure of 3000N, driving the ultrasonic consolidation system 1 to descend until it touches the working platform 4-9 and stops moving, and applies the preset pressure of 3000N.

[0060] Seventh step, start ultrasonic consolidation: On the operation interface displayed on the touch screen 2 ( Figure 8)After clicking jog selection and then ultrasonic on successively, the ultrasonic consolidation system 1 is started. The ultrasonic welding head 1-1 vibrates at a set ultrasonic amplitude of 30% under the drive of the first transducer 1-3 and the second transducer 1-6, and moves according to the set X-axis rate of 10 mm / s, position parameter of 140 mm, Y-axis rate of 10 mm / s, and position parameter to consolidate the aluminum alloy foil on the metal substrate.

Claims

1. An intelligent structure ultrasonic lamination additive manufacturing device, characterized in that: It includes an ultrasonic consolidation system, a downward pressure system, a working platform system, a control system and a hood; the ultrasonic consolidation system includes a first transducer, a first amplitude modulator, an ultrasonic welding head, a second amplitude modulator and a second transducer which are coaxially connected in sequence, a cylindrical pressing roller is coaxially arranged in the middle of the ultrasonic welding head, the first transducer and the second transducer are respectively installed on both sides of the ultrasonic welding head through the first amplitude modulator and the second amplitude modulator to form a push-pull combined control structure, a first connecting shaft is formed at the connecting node of the first transducer and the first amplitude modulator, a second connecting shaft is formed at the connecting node of the second transducer and the second amplitude modulator, a synchronous pulley is fixed on the second connecting shaft through a wheel hole, the outer end of the first transducer is connected to the power device through a first conductive slip ring, and the outer end of the second transducer is connected to the power device through a second conductive slip ring.

2. The intelligent structure ultrasonic lamination additive manufacturing device according to claim 1, characterized in that: The pressing system includes a Z-axis servo motor, a Z-axis ball screw, a Z-axis linear guide, a Z-axis slider and a pressure plate; the ultrasonic consolidation system is installed and fixed on the square pressure plate, the pressure plate is installed and fixed on the Z-axis slider, the Z-axis slider is connected to the Z-axis ball screw, the Z-axis ball screw is connected to the Z-axis servo motor, the Z-axis servo motor adopts a torque control method to drive the Z-axis ball screw to rotate, the Z-axis slider moves linearly along the Z-axis linear guide under the drive of the Z-axis ball screw, and the ultrasonic consolidation system, driven by the Z-axis slider and the Z-axis pressure plate, contacts the working platform to stop moving and apply a preset pressure.

3. The intelligent structure ultrasonic lamination additive manufacturing device according to claim 1, characterized in that: The work platform system comprises an X-axis servo motor, a Y-axis servo motor, an X-axis ball screw, a Y-axis ball screw, an X-axis linear guide, a Y-axis linear guide, an X-axis slider, a Y-axis slider, a frame and a work platform; the work platform is a square metal plate, on which a T-slot for material fixing is processed, and is fixed on the X-axis slider, the X-axis linear guide is fixed on the frame, the frame is fixed on the Y-axis slider, the X-slide is connected to the X-axis ball screw, the X-axis ball screw is connected to the X-axis servo motor, the X-axis servo motor drives the X-axis ball screw to rotate by a displacement control method, the X-axis slider moves linearly along the X-axis linear guide under the drive of the X-axis ball screw, and the work platform moves precisely in the X direction under the drive of the X-axis slider; the connection method and control method of the Y-axis are the same as those of the X-axis, and the frame moves precisely in the Y direction under the drive of the Y-axis slider.

4. The intelligent structure ultrasonic lamination additive manufacturing device according to claim 1, characterized in that: The control system is based on upper and lower computer control modes and industrial Ethernet communication, and adopts full digital closed-loop control to automatically control the ultrasonic consolidation system, the pressing system and the working platform system in real time.

5. The intelligent structure ultrasonic lamination additive manufacturing device according to claim 1, characterized in that: The intelligent structure ultrasonic lamination additive manufacturing equipment is protected by the machine cover; the machine cover is a square sheet metal shield, which is located outside the equipment body and wraps the equipment body part therein, and the circuits in the equipment are arranged and connected in series in the machine cover.

6. The intelligent structure ultrasonic lamination additive manufacturing device according to claim 1, characterized in that: The first transducer and the second transducer are composed of a cylindrical piezoelectric ceramic element as the core part, which is surrounded by a matching layer and a backing material to optimize the transmission and reception of sound waves, allowing them to uniformly emit and receive ultrasonic waves in the circumferential direction; the first transducer and the second transducer are both provided with a gas input device for passing gas for cooling, and a first conductive slip ring connected to the outer end of the first transducer is provided with a rotary joint, one end of the rotary joint is connected to the air inlet pipe, and the other end of the rotary joint is connected to the gas input device on the first transducer; the second conductive slip ring connected to the outer end of the second transducer is provided with a rotary joint, one end of the rotary joint is connected to the air inlet pipe, and the other end of the rotary joint is connected to the gas input device on the second transducer.

7. The intelligent structure ultrasonic lamination additive manufacturing device according to claim 1, characterized in that: The first amplitude modulator and the second amplitude modulator are cylindrical structures, and the amplitude modulation ratio is 2:1 to achieve frequency conversion.

8. The intelligent structure ultrasonic lamination additive manufacturing device according to claim 1 or 6, characterized in that: The first conductive slip ring and the second conductive slip ring are annular structures, fixed on the rotating shaft of the ultrasonic consolidation system, and realize continuous transmission of electric energy and signals when the ultrasonic consolidation system is in a rotating state.

9. The intelligent structure ultrasonic lamination additive manufacturing device according to claim 1, 2 or 4, characterized in that: The ultrasonic consolidation system further comprises a square device fixing plate at the top, and the outer ends of the first conductive slip ring and the second conductive slip ring are respectively fixedly connected to the device fixing plate at the top via hanging plates.

10. The intelligent structure ultrasonic lamination additive manufacturing device according to claim 9, characterized in that: The ultrasonic consolidation system is connected to an ultrasonic generator, and the ultrasonic generator further causes the ultrasonic horn to generate mechanical vibration by transmitting high-frequency electrical signals to the first transducer and the second transducer.

11. The intelligent structure ultrasonic lamination additive manufacturing device according to claim 1, 2 or 4, characterized in that: The downward pressure system includes a pressure sensor, which is installed in the pressure plate and moves with the pressure plate to measure and feed back the downward pressure.

12. The intelligent structure ultrasonic lamination additive manufacturing device according to claim 1 or 4, characterized in that: The control system includes a touch screen, an industrial computer and a PLC system, and control parameters are input into the PLC system through the touch screen or the industrial computer; the PLC system is used to collect detection data of each system and control the start and stop of the X-axis servo motor, the Y-axis servo motor, the Z-axis servo motor and the ultrasonic generator.

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