Ultrasonic automatic seam welder for sheet materials

Abstract

The invention discloses an ultrasonic automatic seam welder for sheet materials, and belongs to the technical field of seam welders, the ultrasonic automatic seam welder for sheet materials comprises a workbench, a supporting seat is fixedly mounted at the upper end of the workbench, a transverse moving module is mounted on the supporting seat, and a connecting plate is mounted on the transverse moving module; the back face of the connecting plate is installed on a guide sliding rail fixed to the workbench in a sliding mode, an air cylinder is fixedly connected to the connecting plate, a roll welding assembly is installed at the lower end of the air cylinder, a positioning part is arranged below the roll welding assembly, and the positioning part is fixed to the workbench and used for limiting a material to be welded. According to the ultrasonic automatic seam welder for the flaky materials, when the materials are subjected to seam welding, the air channel is formed in the welding head, heat generated by working of the welding head is taken away through flowing of airflow in the air channel, meanwhile, the air flow speed around the welding head is increased in an air suction and exhaust mode, and heat accumulation caused by the low air flow speed is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of roll welding machines, in particular to an ultrasonic automatic roll welding machine for sheet materials. Background Art

[0002] The consistency and stability of ultrasonic welding effects of metal materials, plastics or composite materials have always been important indicators of product quality. Taking composite materials as an example, composite materials refer to PET materials in the middle layer, and metal materials are attached to the front and back sides by evaporation or spraying. Compared with ordinary metal materials, composite materials are light in weight and high in safety, so they can significantly improve the energy density of lithium batteries. However, due to the presence of PET material in the middle, the metal on the front and back sides of the composite material cannot conduct electricity smoothly, which will prevent the composite material from becoming an electrode. In order to make the front and back sides of the composite material conductive, a layer of corresponding metal material is attached to the front and back sides of the composite material, and welded by roll welding so that the front and back sides can be conductive.

[0003] For example, a new type of ultrasonic roll welding mechanism with the announcement number of CN215620054U includes a frame, a toothed knife roller is mounted on the frame, a roll welding mechanism is arranged above the toothed knife roller, the roll welding mechanism includes a welding head arranged above the toothed knife roller and cooperating with the toothed knife roller, the welding head has a welding part and a roller shaft part for installation, a shaft sleeve is sleeved on the outer surface of the roller shaft part, bearings are installed at both ends of the shaft sleeve and can be rotatably installed on a fixed seat of the frame through the bearing, a servo motor and a synchronous belt assembly for driving the shaft sleeve to rotate are arranged on the frame, and the linear speed of the welding head is the same as the linear speed of the toothed knife roller.

[0004] The above-mentioned prior art has the following technical problems: when the existing rolling welding mechanism welds the workpiece, the electrical energy is converted into high-frequency mechanical vibration energy through the transducer to complete the welding. Therefore, the welding head is prone to high temperature during the welding process. When the welding head is in a high temperature state for a long time, it is easy to affect the service life of the welding head. When the air flow rate around the welding head is poor, it will also cause heat to accumulate around the welding head.

[0005] Therefore, we propose an ultrasonic automatic seam welding machine for sheet materials to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide an ultrasonic automatic seam welding machine for sheet materials to solve the problem raised in the above background technology that the existing seam welding mechanisms on the market convert electrical energy into high-frequency mechanical vibration energy through a transducer when welding the workpiece, thereby completing the welding. Therefore, the welding head is prone to a high temperature state during the welding process. When the welding head is in a high temperature state for a long time, it is easy to affect the service life of the welding head. When the air flow rate around the welding head is poor, it will also cause heat to accumulate around the welding head.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ultrasonic automatic roll welding machine for sheet materials, comprising a workbench, a support seat is fixedly installed on the upper end of the workbench, and a lateral moving module is installed on the support seat, a connecting plate is installed on the lateral moving module, and the back side of the connecting plate is slidably installed on a guide rail fixed on the workbench, and also includes: a cylinder is fixedly connected to the connecting plate, and a roll welding assembly is installed at the lower end of the cylinder, a positioning component is arranged below the roll welding assembly, and the positioning component is fixed on the workbench, which is used to limit the welding material to be welded, and a spoiler cooling structure is installed on the roll welding assembly, which is used to cool the gas supply to the roll welding assembly and increase the air flow rate around the roll welding assembly.

[0008] Preferably, the roll welding assembly includes a conductive slip ring, a transducer, a welding head and a protective cover, the transducer is installed on one side of the conductive slip ring, and the welding head is installed on the end of the transducer away from the conductive slip ring, the welding head is installed on the bearing seat through a bearing, and a dust cover is installed on the bearing seat.

[0009] By adopting the above technical solution, the conductive slip ring and the transducer are arranged to generate ultrasonic vibrations of a certain frequency and amplitude at the welding head.

[0010] Preferably, the turbulence and cooling structure includes an air supply pipe, an air flow channel, an air outlet, a shunt pipe, a connecting block, a containing groove, a wind wheel, a reciprocating screw, a piston block, an empty groove, a vertical rod, a through hole, an auxiliary spring and a vibrating ball. One end of the air supply pipe is installed in the middle of the welding head, and the other end of the air supply pipe is connected to an external air source device. An air flow channel is opened in the middle of the welding head, and air outlets are opened in the circumference of the air flow channel. A shunt pipe is installed on the air supply pipe, and the end of the shunt pipe away from the air supply pipe is connected to the connecting block. The connecting block is provided with a receiving groove inside, and a wind wheel is installed inside the receiving groove, an exhaust passage is provided on the side of the connecting block away from the shunt pipe, the middle key of the wind wheel is connected with a reciprocating screw, and a piston block is installed at the lower end of the reciprocating screw, the piston block is located inside the empty groove, and the empty groove is provided in the middle of the vertical rod, the vertical rod is fixed to the lower end of the connecting block, and a through hole is provided at the bottom of the vertical rod, an auxiliary spring is fixedly connected to the inside of the piston block, and a vibration ball is installed at the end of the auxiliary spring that is not connected to the inside of the piston block.

[0011] By adopting the above technical solution, the auxiliary spring can be provided to enable the vibrating ball to reset after moving inside the vertical rod.

[0012] Preferably, the air flow channel is interconnected with the outside through air outlet holes, and a plurality of air outlet holes are evenly distributed at equal angles along the circumference of the air flow channel.

[0013] By adopting the above technical solution, when air flows into the air flow channel, the air flow can flow out through the air outlet holes, thereby taking away the heat of the welding head.

[0014] Preferably, the welding head can rotate on the gas pipe, and the external gas source equipment connected to the gas pipe is an air pump.

[0015] By adopting the above technical solution, the welding head is rotated on the gas pipe, thereby avoiding affecting the normal rolling welding. At the same time, the air pump can be used to supply air to the inside of the welding head through the gas pipe.

[0016] Preferably, the reciprocating screw and the piston block are threadedly connected, and a sealing ring is fixedly connected to the edge of the piston block.

[0017] By adopting the above technical solution, the sealing performance of the piston block in the hollow groove inside the vertical rod can be ensured by the sealing ring fixed around the piston block.

[0018] Preferably, the piston block can slide in the hollow groove inside the vertical rod, and the outer wall of the piston block and the inner wall of the hollow groove fit each other, and the cross section of the hollow groove is set to be rectangular.

[0019] By adopting the above technical solution and the rectangular structure of the piston block, it is possible to avoid the piston block driving the vertical rod to rotate synchronously.

[0020] Preferably, the hollow groove inside the vertical rod is connected to the outside through a through hole, and the edge of the vertical rod is provided with steel wire bristles, and the steel wire bristles on the edge of the vertical rod are in contact with the welding head.

[0021] By adopting the above technical solution, when the welding head rotates, the powder and debris attached to the surface of the welding head can be cleaned by the steel wire brush on the edge of the vertical rod.

[0022] Preferably, the auxiliary spring and the vibration ball are evenly distributed in the empty groove inside the vertical rod, and the vibration ball and the empty groove inside the vertical rod fit each other.

[0023] By adopting the above technical solution, the auxiliary spring inside the empty slot can be vibrated by suction and blowing, and then the vertical rod can be impacted by the vibrating ball.

[0024] Compared with the prior art, the invention has the following beneficial effects: the ultrasonic automatic seam welding machine for sheet materials can, when seam welding the material, open an air passage on the welding head, use the airflow in the air passage to take away the heat generated by the welding head, and at the same time use the method of air extraction and exhaust to speed up the air flow rate around the welding head, so as to avoid heat accumulation caused by slow air flow rate; 1. A lateral moving module is provided, and the cylinder can be set to push the roll welding assembly downward to a position where it fits the material to be welded fixed on the positioning component, thereby adjusting the distance between the roll welding assembly and the material to be welded. At the same time, during welding, the connecting plate is controlled to move on the guide rail by the lateral moving module, and the movement of the lateral moving module is used to drive the roll welding assembly to move synchronously, so that the roll welding assembly can weld the sheet material evenly; 2. An air outlet is provided, and air is delivered to the air flow channel inside the welding head through an air pump and an air delivery pipe. After the air flow flows in the air flow channel inside the welding head, heat is exchanged with the welding head, and the air flow after heat exchange is discharged outward through the air outlet, thereby realizing air flow heat exchange and cooling of the welding head. Part of the air flow in the air delivery pipe enters the interior of the connecting block through the shunt pipe. After the air flow enters the interior of the connecting block, the wind wheel can be driven to rotate. The rotation of the wind wheel and the reciprocating screw can make the piston block reciprocate inside the vertical rod. The reciprocating movement of the piston block can use the through hole and the empty slot to suck and discharge the air flow around the welding head, so as to speed up the air flow rate around the welding head and avoid heat accumulation caused by slow air flow rate; 3. A vibrating ball is provided, and the wire brush bristles are fixed circumferentially on the vertical rod. Therefore, when the welding head rotates for roll welding, the dust attached to the edge of the welding head can be scraped off by the wire brush bristles. At the same time, when the airflow inside the empty slot is squeezed outward, the airflow can cause the auxiliary spring inside the vertical rod to deform and reset. At the same time, the vertical rod is installed on the roll welding assembly. The vibration generated by the roll welding assembly during welding can also cause the auxiliary spring inside the vertical rod to deform and reset. Therefore, the vibration ball at the end can be used to impact the vertical rod through the deformation and reset of the auxiliary spring. The dust attached to the wire brush bristles can be shaken off by the vibration generated by the impact on the vertical rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the front three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the structure of the seam welding assembly and the positioning component of the present invention; Figure 3 It is a schematic diagram of the connecting plate and the cylinder structure of the present invention; Figure 4 It is a schematic diagram of the structure of the transducer and welding head of the present invention; Figure 5 It is a schematic diagram of the welding head and the vertical rod structure of the present invention; Figure 6 It is a schematic diagram of the vertical rod and through hole structure of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the connecting block and the wind wheel of the present invention; Figure 8 This is a schematic diagram of the auxiliary spring and the vibration ball structure of the present invention; Fig. 9 This is a schematic diagram of the structure of the gas transmission pipe and the diversion pipe of the present invention; Fig.10 It is a schematic diagram of the air flow channel and air outlet structure of the present invention.

[0026] In the figure: 1. workbench; 2. support seat; 3. lateral movement module; 4. connecting plate; 5. guide rail; 6. cylinder; 7. roll welding assembly; 701. conductive slip ring; 702. transducer; 703. welding head; 704. protective cover; 8. positioning component; 9. spoiler and cooling structure; 901. air supply pipe; 902. air flow channel; 903. air outlet; 904. shunt pipe; 905. connecting block; 906. receiving groove; 907. wind wheel; 908. reciprocating screw rod; 909. piston block; 910. empty groove; 911. vertical rod; 912. through hole; 913. auxiliary spring; 914. vibration ball. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1: Please refer to Figure 1-Figure 10When the existing roll welding mechanism welds the workpiece, the transducer 702 converts the electrical energy into high-frequency mechanical vibration energy to complete the welding. Therefore, the welding head 703 is prone to high temperature during the welding process. When the welding head 703 is in a high temperature state for a long time, it is easy to affect the service life of the welding head 703. When the air flow rate around the welding head 703 is poor, heat will also accumulate around the welding head 703. In order to solve this technical problem, the present embodiment discloses the following technical content: an ultrasonic automatic roll welding machine for sheet materials, comprising a workbench 1, a support seat 2 is fixedly installed on the upper end of the workbench 1, and a lateral moving module 3 is installed on the support seat 2, a connecting plate 4 is installed on the lateral moving module 3, and the back side of the connecting plate 4 is slidably installed. It is mounted on a guide rail 5 fixed on a workbench 1, and also includes: a cylinder 6 is fixedly connected to the connecting plate 4, and a roll welding assembly 7 is installed at the lower end of the cylinder 6, a positioning component 8 is arranged below the roll welding assembly 7, and the positioning component 8 is fixed on the workbench 1, which is used to limit the welding material to be welded, and a turbulent cooling structure 9 is installed on the roll welding assembly 7, and the turbulent cooling structure 9 is used to cool the air supply of the roll welding assembly 7 and increase the air flow rate around the roll welding assembly 7, the roll welding assembly 7 includes a conductive slip ring 701, a transducer 702, a welding head 703 and a protective cover 704, a transducer 702 is installed on one side of the conductive slip ring 701, and a welding head 703 is installed on the end of the transducer 702 away from the conductive slip ring 701, and the welding head 703 is installed on the bearing seat through a bearing, and the bearing A dust cover 704 is installed on the seat, and the turbulence cooling structure 9 includes an air supply pipe 901, an air flow channel 902, an air outlet 903, a shunt pipe 904, a connecting block 905, a receiving groove 906, a wind wheel 907, a reciprocating screw rod 908, a piston block 909, an empty groove 910, a vertical rod 911, a through hole 912, an auxiliary spring 913 and a vibration ball 914. One end of the air supply pipe 901 is installed in the middle of the welding head 703, and the other end of the air supply pipe 901 is connected to an external air source device. An air flow channel 902 is opened in the middle of the welding head 703, and an air outlet 903 is opened in the circumference of the air flow channel 902. A shunt pipe 904 is installed on the air supply pipe 901, and the end of the shunt pipe 904 away from the air supply pipe 901 is connected to the connecting block 905. The connecting block An accommodating groove 906 is provided inside 905, and a wind wheel 907 is installed inside the accommodating groove 906. An exhaust passage is provided on the side of the connecting block 905 away from the shunt pipe 904. A reciprocating screw rod 908 is keyed to the middle of the wind wheel 907, and a piston block 909 is installed at the lower end of the reciprocating screw rod 908. The piston block 909 is located inside the empty groove 910, and the empty groove 910 is provided in the middle of the vertical rod 911. The vertical rod 911 is fixed to the lower end of the connecting block 905, and a through hole 912 is provided at the bottom of the vertical rod 911. An auxiliary spring 913 is fixedly connected to the inside of the piston block 909, and a vibration ball 914 is installed at the end of the auxiliary spring 913 that is not connected to the inside of the piston block 909. The airflow channel 902 is connected to the outside through the air outlet 903.There are multiple air outlet holes 903 evenly distributed at equal angles along the circumference of the air flow channel 902. The welding head 703 can rotate on the air pipe 901. The external air source device connected to the air pipe 901 is an air pump. The reciprocating screw 908 and the piston block 909 are threadedly connected, and a sealing ring is fixedly connected to the edge of the piston block 909. The piston block 909 can slide in the empty groove 910 inside the vertical rod 911, and the outer wall of the piston block 909 and the inner wall of the empty groove 910 fit each other. The cross section of the empty groove 910 is set to a rectangle, and the empty groove 910 inside the vertical rod 911 is connected to the outside through the through hole 912.

[0029] When the sheet material needs to be roll welded, the sheet material is placed on the positioning component 8 on the workbench 1 and fixed, and then the cylinder 6 is turned on. After the cylinder 6 is turned on, the roll welding component 7 moves downward and contacts the sheet material fixed on the positioning component 8. At this time, the conductive slip ring 701 and the transducer 702 on the roll welding component 7 convert the electrical energy into ultrasonic mechanical energy, and the ultrasonic vibration is used to convert the energy to the welding mark through the welding head 703, so that the materials are welded together. In the process of roll welding, the connecting plate 4 is controlled to move on the guide rail 5 through the lateral movement module 3. The movement of the connecting plate 4 can make the roll welding component 7 move synchronously, and the roll welding component 7 The movement of the welding material can be uniformly rolled welded. During the welding process, air is supplied to the air flow channel 902 inside the welding head 703 through the air pump and the air pipe 901. After the air flow flows in the air flow channel 902, the air flow exchanges heat with the welding head 703, thereby taking away the heat of the welding head 703. The air flow after heat exchange flows outward through the air outlet 903 circumferentially of the welding head 703, so as to realize air cooling of the welding head 703. At the same time, after the air flow enters the air pipe 901, the air flow can enter the connecting block 905 through the shunt pipe 904. After the connecting block 905 enters the air flow, the air flow can drive the wind wheel 907 in the receiving groove 906 to rotate. After the wind wheel 907 rotates The reciprocating screw rod 908 can be driven to rotate synchronously. The rotation of the reciprocating screw rod 908 can make the threaded piston block 909 move back and forth up and down in the empty slot 910 inside the vertical rod 911. When the piston block 909 moves to the top of the vertical rod 911, the airflow around the welding head 703 can be sucked into the inside of the empty slot 910 through the through hole 912. When the piston block 909 moves downward, the airflow inside the empty slot 910 can be squeezed out through the through hole 912. In this way, the airflow around the welding head 703 is extracted and discharged, thereby accelerating the air flow rate around the welding head 703, avoiding heat accumulation due to the slow air flow rate around the welding head 703, which is very useful for direct air cooling. Although it can also reduce the temperature of the welding head, its effect may be limited by the contact area and contact time between the cold air and the surface of the welding head. In addition, direct air blowing may not be able to fully cool the heat accumulation area inside the welding head. The temperature control of direct air blowing cooling may be relatively rough, because the flow and direction of the cold air may not be accurately adjusted, resulting in different cooling speeds of various parts of the welding head. Internal open-hole air cooling can more accurately control the temperature of the welding head by precisely controlling the flow, speed and direction of the cold air, which helps to reduce potential problems such as thermal stress, deformation and cracks during welding. Since the cold air can be blown directly into the welding head, it can take away the heat generated during welding more quickly.

[0030] Embodiment 2: The technical contents disclosed in this embodiment are further improved on the basis of the above-mentioned embodiment 1. The following technical contents are disclosed in this embodiment: the edge of the vertical rod 911 is provided with steel wire bristles, and the steel wire bristles on the edge of the vertical rod 911 fit with the welding head 703. The auxiliary spring 913 and the vibration ball 914 are evenly distributed in the empty groove 910 inside the vertical rod 911, and the vibration ball 914 fits with the empty groove 910 inside the vertical rod 911.

[0031] Because the edge of the vertical rod 911 is provided with wire bristles, when the welding head 703 is performing the rotary roll welding operation, the dust on the surface of the welding head 703 can be scraped off by the wire bristles on the edge of the vertical rod 911, thereby realizing automatic cleaning of the welding head 703. At the same time, when the vertical rod 911 is exhausted outwardly through the through hole 912, the auxiliary spring 913 can be vibrated through the outward exhaust, thereby utilizing the vibrating ball 914 at the end of the auxiliary spring 913 to impact the vertical rod 911, and the dust attached to the wire bristles can be shaken off by the vibration generated by the impact on the vertical rod 911. At the same time, the vertical rod 911 is also installed on the roll welding assembly 7. When the roll welding assembly 7 is performing welding, it realizes welding by generating ultrasonic vibrations of a certain frequency and amplitude. Therefore, when the roll welding assembly 7 vibrates, the auxiliary spring 913 inside the vertical rod 911 can also be vibrated, and then the vibrating ball 914 at the end of the auxiliary spring 913 can be used to impact the vertical rod 911.

[0032] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultrasonic automatic seam welding machine for sheet materials, comprising a workbench (1), a support seat (2) fixedly mounted on the upper end of the workbench (1), a lateral moving module (3) mounted on the support seat (2), a connecting plate (4) mounted on the lateral moving module (3), and the back side of the connecting plate (4) slidably mounted on a guide rail (5) fixed on the workbench (1), characterized in that: Also includes: The connecting plate (4) is fixedly connected to a cylinder (6), and a roll welding assembly (7) is installed at the lower end of the cylinder (6). A positioning component (8) is arranged below the roll welding assembly (7), and the positioning component (8) is fixed on the workbench (1) and is used to limit the position of the material to be welded. The roll welding assembly (7) is installed with a spoiler and cooling structure (9), and the spoiler and cooling structure (9) is used to cool the air supply of the roll welding assembly (7) and to increase the air flow rate around the roll welding assembly (7).

2. The ultrasonic automatic seam welding machine for sheet materials according to claim 1, characterized in that: The roll welding assembly (7) comprises a conductive slip ring (701), a transducer (702), a welding head (703) and a protective cover (704); the transducer (702) is installed on one side of the conductive slip ring (701), and the welding head (703) is installed on an end of the transducer (702) away from the conductive slip ring (701); the welding head (703) is installed on a bearing seat via a bearing, and a dust cover (704) is installed on the bearing seat.

3. The ultrasonic automatic seam welding machine for sheet materials according to claim 2, characterized in that: The turbulent flow cooling structure (9) comprises an air supply pipe (901), an air flow channel (902), an air outlet (903), a shunt pipe (904), a connecting block (905), a containing groove (906), a wind wheel (907), a reciprocating screw rod (908), a piston block (909), an empty groove (910), a vertical rod (911), a through hole (912), an auxiliary spring (913) and a vibrating ball (914). One end of the air supply pipe (901) is installed in the middle of the welding head (703), and the other end of the air supply pipe (901) is connected to an external air source device. The middle of the welding head (703) is provided with an air flow channel (902), and the air outlet (903) is provided in the circumferential direction of the air flow channel (902). The shunt pipe (904) is installed on the air supply pipe (901), and one end of the shunt pipe (904) away from the air supply pipe (901) is connected to the connecting block (905). ) are interconnected, a receiving groove (906) is provided inside the connecting block (905), and a wind wheel (907) is installed inside the receiving groove (906), an exhaust passage is provided on the side of the connecting block (905) away from the shunt pipe (904), a reciprocating screw rod (908) is keyed in the middle of the wind wheel (907), and a piston block (909) is installed at the lower end of the reciprocating screw rod (908), the piston block (909) is located inside the empty groove (910), and the empty groove (910) is provided in the middle of the vertical rod (911), the vertical rod (911) is fixed to the lower end of the connecting block (905), and a through hole (912) is provided at the bottom of the vertical rod (911), an auxiliary spring (913) is fixedly connected inside the piston block (909), and a vibration ball (914) is installed at the end of the auxiliary spring (913) that is not connected to the inside of the piston block (909).

4. The ultrasonic automatic seam welding machine for sheet materials according to claim 3, characterized in that: The airflow channel (902) is connected to the outside through the air outlet holes (903), and a plurality of air outlet holes (903) are evenly distributed at equal angles along the circumference of the airflow channel (902).

5. The ultrasonic automatic seam welding machine for sheet materials according to claim 3, characterized in that: The welding head (703) is capable of rotating on the gas pipe (901), and the external gas source device connected to the gas pipe (901) is an air pump.

6. The ultrasonic automatic seam welding machine for sheet materials according to claim 3, characterized in that: The reciprocating screw rod (908) and the piston block (909) are threadedly connected, and a sealing ring is fixedly connected to the edge of the piston block (909).

7. The ultrasonic automatic seam welding machine for sheet materials according to claim 3, characterized in that: The piston block (909) can slide in the hollow groove (910) inside the vertical rod (911), and the outer wall of the piston block (909) and the inner wall of the hollow groove (910) fit each other, and the cross-section of the hollow groove (910) is set to be rectangular.

8. The ultrasonic automatic seam welding machine for sheet materials according to claim 3, characterized in that: The hollow groove (910) inside the vertical rod (911) is connected to the outside through the through hole (912), and the edge of the vertical rod (911) is provided with steel wire bristles, and the steel wire bristles on the edge of the vertical rod (911) are in contact with the welding head (703).

9. The ultrasonic automatic seam welding machine for sheet materials according to claim 3, characterized in that: The auxiliary spring (913) and the vibration ball (914) are evenly distributed in the empty slot (910) inside the vertical rod (911), and the vibration ball (914) and the empty slot (910) inside the vertical rod (911) fit each other.

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